Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1 | /* |
| 2 | * drm_irq.c IRQ and vblank support |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| 5 | * \author Gareth Hughes <gareth@valinux.com> |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com |
| 10 | * |
| 11 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. |
| 12 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| 13 | * All Rights Reserved. |
| 14 | * |
| 15 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 16 | * copy of this software and associated documentation files (the "Software"), |
| 17 | * to deal in the Software without restriction, including without limitation |
| 18 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 19 | * and/or sell copies of the Software, and to permit persons to whom the |
| 20 | * Software is furnished to do so, subject to the following conditions: |
| 21 | * |
| 22 | * The above copyright notice and this permission notice (including the next |
| 23 | * paragraph) shall be included in all copies or substantial portions of the |
| 24 | * Software. |
| 25 | * |
| 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 27 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 28 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 29 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 30 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 31 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 32 | * OTHER DEALINGS IN THE SOFTWARE. |
| 33 | */ |
| 34 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 35 | #include <drm/drmP.h> |
Jesse Barnes | ac2874b | 2010-07-01 16:47:31 -0700 | [diff] [blame] | 36 | #include "drm_trace.h" |
Daniel Vetter | 1888299 | 2014-09-10 08:16:10 +0200 | [diff] [blame] | 37 | #include "drm_internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #include <linux/interrupt.h> /* For task queue support */ |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Dave Airlie | 28d5204 | 2009-09-21 14:33:58 +1000 | [diff] [blame] | 42 | #include <linux/vgaarb.h> |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 43 | #include <linux/export.h> |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 44 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 45 | /* Retry timestamp calculation up to 3 times to satisfy |
| 46 | * drm_timestamp_precision before giving up. |
| 47 | */ |
| 48 | #define DRM_TIMESTAMP_MAXRETRIES 3 |
| 49 | |
| 50 | /* Threshold in nanoseconds for detection of redundant |
| 51 | * vblank irq in drm_handle_vblank(). 1 msec should be ok. |
| 52 | */ |
| 53 | #define DRM_REDUNDANT_VBLIRQ_THRESH_NS 1000000 |
| 54 | |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 55 | static bool |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 56 | drm_get_last_vbltimestamp(struct drm_device *dev, unsigned int pipe, |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 57 | struct timeval *tvblank, unsigned flags); |
| 58 | |
Daniel Vetter | 1888299 | 2014-09-10 08:16:10 +0200 | [diff] [blame] | 59 | static unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
| 60 | |
| 61 | /* |
| 62 | * Default to use monotonic timestamps for wait-for-vblank and page-flip |
| 63 | * complete events. |
| 64 | */ |
| 65 | unsigned int drm_timestamp_monotonic = 1; |
| 66 | |
| 67 | static int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
| 68 | |
| 69 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
| 70 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); |
| 71 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
Dan Carpenter | d9d8c4c | 2016-01-08 14:00:45 +0300 | [diff] [blame] | 72 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)"); |
| 73 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); |
| 74 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
Daniel Vetter | 1888299 | 2014-09-10 08:16:10 +0200 | [diff] [blame] | 75 | |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 76 | static void store_vblank(struct drm_device *dev, unsigned int pipe, |
Daniel Vetter | 209e4dbc | 2015-08-07 12:31:17 +0200 | [diff] [blame] | 77 | u32 vblank_count_inc, |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 78 | struct timeval *t_vblank, u32 last) |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 79 | { |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 80 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 81 | |
| 82 | assert_spin_locked(&dev->vblank_time_lock); |
| 83 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 84 | vblank->last = last; |
| 85 | |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 86 | write_seqlock(&vblank->seqlock); |
| 87 | vblank->time = *t_vblank; |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 88 | vblank->count += vblank_count_inc; |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 89 | write_sequnlock(&vblank->seqlock); |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 90 | } |
| 91 | |
Shawn Guo | 5ac7475 | 2017-02-07 17:16:15 +0800 | [diff] [blame] | 92 | /* |
| 93 | * "No hw counter" fallback implementation of .get_vblank_counter() hook, |
| 94 | * if there is no useable hardware frame counter available. |
| 95 | */ |
| 96 | static u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe) |
| 97 | { |
| 98 | WARN_ON_ONCE(dev->max_vblank_count != 0); |
| 99 | return 0; |
| 100 | } |
| 101 | |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 102 | static u32 __get_vblank_counter(struct drm_device *dev, unsigned int pipe) |
| 103 | { |
| 104 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 105 | struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe); |
| 106 | |
| 107 | if (crtc->funcs->get_vblank_counter) |
| 108 | return crtc->funcs->get_vblank_counter(crtc); |
| 109 | } |
| 110 | |
| 111 | if (dev->driver->get_vblank_counter) |
| 112 | return dev->driver->get_vblank_counter(dev, pipe); |
| 113 | |
| 114 | return drm_vblank_no_hw_counter(dev, pipe); |
| 115 | } |
| 116 | |
Daniel Vetter | 00edbe1 | 2016-05-31 23:11:14 +0200 | [diff] [blame] | 117 | /* |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 118 | * Reset the stored timestamp for the current vblank count to correspond |
| 119 | * to the last vblank occurred. |
| 120 | * |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 121 | * Only to be called from drm_crtc_vblank_on(). |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 122 | * |
Daniel Vetter | ef40cbf9 | 2017-01-25 07:26:47 +0100 | [diff] [blame] | 123 | * Note: caller must hold &drm_device.vbl_lock since this reads & writes |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 124 | * device vblank fields. |
| 125 | */ |
| 126 | static void drm_reset_vblank_timestamp(struct drm_device *dev, unsigned int pipe) |
| 127 | { |
| 128 | u32 cur_vblank; |
| 129 | bool rc; |
| 130 | struct timeval t_vblank; |
| 131 | int count = DRM_TIMESTAMP_MAXRETRIES; |
| 132 | |
| 133 | spin_lock(&dev->vblank_time_lock); |
| 134 | |
| 135 | /* |
| 136 | * sample the current counter to avoid random jumps |
| 137 | * when drm_vblank_enable() applies the diff |
| 138 | */ |
| 139 | do { |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 140 | cur_vblank = __get_vblank_counter(dev, pipe); |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 141 | rc = drm_get_last_vbltimestamp(dev, pipe, &t_vblank, 0); |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 142 | } while (cur_vblank != __get_vblank_counter(dev, pipe) && --count > 0); |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 143 | |
| 144 | /* |
| 145 | * Only reinitialize corresponding vblank timestamp if high-precision query |
| 146 | * available and didn't fail. Otherwise reinitialize delayed at next vblank |
| 147 | * interrupt and assign 0 for now, to mark the vblanktimestamp as invalid. |
| 148 | */ |
| 149 | if (!rc) |
| 150 | t_vblank = (struct timeval) {0, 0}; |
| 151 | |
| 152 | /* |
| 153 | * +1 to make sure user will never see the same |
| 154 | * vblank counter value before and after a modeset |
| 155 | */ |
| 156 | store_vblank(dev, pipe, 1, &t_vblank, cur_vblank); |
| 157 | |
| 158 | spin_unlock(&dev->vblank_time_lock); |
| 159 | } |
| 160 | |
Daniel Vetter | 00edbe1 | 2016-05-31 23:11:14 +0200 | [diff] [blame] | 161 | /* |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 162 | * Call back into the driver to update the appropriate vblank counter |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 163 | * (specified by @pipe). Deal with wraparound, if it occurred, and |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 164 | * update the last read value so we can deal with wraparound on the next |
| 165 | * call if necessary. |
| 166 | * |
| 167 | * Only necessary when going from off->on, to account for frames we |
| 168 | * didn't get an interrupt for. |
| 169 | * |
Daniel Vetter | ef40cbf9 | 2017-01-25 07:26:47 +0100 | [diff] [blame] | 170 | * Note: caller must hold &drm_device.vbl_lock since this reads & writes |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 171 | * device vblank fields. |
| 172 | */ |
Ville Syrjälä | a6e610d | 2015-09-14 22:43:47 +0300 | [diff] [blame] | 173 | static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe, |
| 174 | unsigned long flags) |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 175 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 176 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 177 | u32 cur_vblank, diff; |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 178 | bool rc; |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 179 | struct timeval t_vblank; |
Ville Syrjälä | facfb06 | 2015-09-14 22:43:48 +0300 | [diff] [blame] | 180 | int count = DRM_TIMESTAMP_MAXRETRIES; |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 181 | int framedur_ns = vblank->framedur_ns; |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 182 | |
| 183 | /* |
| 184 | * Interrupts were disabled prior to this call, so deal with counter |
| 185 | * wrap if needed. |
Michel Dänzer | 5ceecb2 | 2015-05-26 17:53:38 +0900 | [diff] [blame] | 186 | * NOTE! It's possible we lost a full dev->max_vblank_count + 1 events |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 187 | * here if the register is small or we had vblank interrupts off for |
| 188 | * a long time. |
| 189 | * |
| 190 | * We repeat the hardware vblank counter & timestamp query until |
| 191 | * we get consistent results. This to prevent races between gpu |
| 192 | * updating its hardware counter while we are retrieving the |
| 193 | * corresponding vblank timestamp. |
| 194 | */ |
| 195 | do { |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 196 | cur_vblank = __get_vblank_counter(dev, pipe); |
Ville Syrjälä | a6e610d | 2015-09-14 22:43:47 +0300 | [diff] [blame] | 197 | rc = drm_get_last_vbltimestamp(dev, pipe, &t_vblank, flags); |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 198 | } while (cur_vblank != __get_vblank_counter(dev, pipe) && --count > 0); |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 199 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 200 | if (dev->max_vblank_count != 0) { |
| 201 | /* trust the hw counter when it's around */ |
| 202 | diff = (cur_vblank - vblank->last) & dev->max_vblank_count; |
| 203 | } else if (rc && framedur_ns) { |
| 204 | const struct timeval *t_old; |
| 205 | u64 diff_ns; |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 206 | |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 207 | t_old = &vblank->time; |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 208 | diff_ns = timeval_to_ns(&t_vblank) - timeval_to_ns(t_old); |
| 209 | |
| 210 | /* |
| 211 | * Figure out how many vblanks we've missed based |
| 212 | * on the difference in the timestamps and the |
| 213 | * frame/field duration. |
| 214 | */ |
| 215 | diff = DIV_ROUND_CLOSEST_ULL(diff_ns, framedur_ns); |
| 216 | |
| 217 | if (diff == 0 && flags & DRM_CALLED_FROM_VBLIRQ) |
Ville Syrjälä | 235fabe | 2015-10-09 22:57:37 +0300 | [diff] [blame] | 218 | DRM_DEBUG_VBL("crtc %u: Redundant vblirq ignored." |
| 219 | " diff_ns = %lld, framedur_ns = %d)\n", |
| 220 | pipe, (long long) diff_ns, framedur_ns); |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 221 | } else { |
| 222 | /* some kind of default for drivers w/o accurate vbl timestamping */ |
| 223 | diff = (flags & DRM_CALLED_FROM_VBLIRQ) != 0; |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 224 | } |
| 225 | |
Mario Kleiner | 99b8e71 | 2016-02-12 20:30:28 +0100 | [diff] [blame] | 226 | /* |
Mario Kleiner | c61934e | 2016-02-12 20:30:29 +0100 | [diff] [blame] | 227 | * Within a drm_vblank_pre_modeset - drm_vblank_post_modeset |
| 228 | * interval? If so then vblank irqs keep running and it will likely |
| 229 | * happen that the hardware vblank counter is not trustworthy as it |
| 230 | * might reset at some point in that interval and vblank timestamps |
| 231 | * are not trustworthy either in that interval. Iow. this can result |
| 232 | * in a bogus diff >> 1 which must be avoided as it would cause |
| 233 | * random large forward jumps of the software vblank counter. |
| 234 | */ |
| 235 | if (diff > 1 && (vblank->inmodeset & 0x2)) { |
| 236 | DRM_DEBUG_VBL("clamping vblank bump to 1 on crtc %u: diffr=%u" |
| 237 | " due to pre-modeset.\n", pipe, diff); |
| 238 | diff = 1; |
| 239 | } |
| 240 | |
Ville Syrjälä | 235fabe | 2015-10-09 22:57:37 +0300 | [diff] [blame] | 241 | DRM_DEBUG_VBL("updating vblank count on crtc %u:" |
| 242 | " current=%u, diff=%u, hw=%u hw_last=%u\n", |
| 243 | pipe, vblank->count, diff, cur_vblank, vblank->last); |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 244 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 245 | if (diff == 0) { |
| 246 | WARN_ON_ONCE(cur_vblank != vblank->last); |
Mario Kleiner | da8f439 | 2014-09-13 18:25:54 +0200 | [diff] [blame] | 247 | return; |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 248 | } |
Mario Kleiner | da8f439 | 2014-09-13 18:25:54 +0200 | [diff] [blame] | 249 | |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 250 | /* |
| 251 | * Only reinitialize corresponding vblank timestamp if high-precision query |
Ville Syrjälä | fa4270d | 2015-09-30 19:21:34 +0300 | [diff] [blame] | 252 | * available and didn't fail, or we were called from the vblank interrupt. |
| 253 | * Otherwise reinitialize delayed at next vblank interrupt and assign 0 |
| 254 | * for now, to mark the vblanktimestamp as invalid. |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 255 | */ |
Ville Syrjälä | fa4270d | 2015-09-30 19:21:34 +0300 | [diff] [blame] | 256 | if (!rc && (flags & DRM_CALLED_FROM_VBLIRQ) == 0) |
Mario Kleiner | d66a1e3 | 2015-05-04 06:29:46 +0200 | [diff] [blame] | 257 | t_vblank = (struct timeval) {0, 0}; |
| 258 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 259 | store_vblank(dev, pipe, diff, &t_vblank, cur_vblank); |
Ville Syrjälä | 13b030af5 | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 260 | } |
| 261 | |
Daniel Vetter | d6b0f62 | 2016-11-14 10:02:53 +0100 | [diff] [blame] | 262 | static u32 drm_vblank_count(struct drm_device *dev, unsigned int pipe) |
| 263 | { |
| 264 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
| 265 | |
| 266 | if (WARN_ON(pipe >= dev->num_crtcs)) |
| 267 | return 0; |
| 268 | |
| 269 | return vblank->count; |
| 270 | } |
| 271 | |
Maarten Lankhorst | af61d5c | 2016-05-17 15:07:44 +0200 | [diff] [blame] | 272 | /** |
| 273 | * drm_accurate_vblank_count - retrieve the master vblank counter |
| 274 | * @crtc: which counter to retrieve |
| 275 | * |
| 276 | * This function is similar to @drm_crtc_vblank_count but this |
| 277 | * function interpolates to handle a race with vblank irq's. |
| 278 | * |
| 279 | * This is mostly useful for hardware that can obtain the scanout |
| 280 | * position, but doesn't have a frame counter. |
| 281 | */ |
| 282 | u32 drm_accurate_vblank_count(struct drm_crtc *crtc) |
| 283 | { |
| 284 | struct drm_device *dev = crtc->dev; |
| 285 | unsigned int pipe = drm_crtc_index(crtc); |
| 286 | u32 vblank; |
| 287 | unsigned long flags; |
| 288 | |
| 289 | WARN(!dev->driver->get_vblank_timestamp, |
| 290 | "This function requires support for accurate vblank timestamps."); |
| 291 | |
| 292 | spin_lock_irqsave(&dev->vblank_time_lock, flags); |
| 293 | |
| 294 | drm_update_vblank_count(dev, pipe, 0); |
| 295 | vblank = drm_vblank_count(dev, pipe); |
| 296 | |
| 297 | spin_unlock_irqrestore(&dev->vblank_time_lock, flags); |
| 298 | |
| 299 | return vblank; |
| 300 | } |
| 301 | EXPORT_SYMBOL(drm_accurate_vblank_count); |
| 302 | |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 303 | static void __disable_vblank(struct drm_device *dev, unsigned int pipe) |
| 304 | { |
| 305 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 306 | struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe); |
| 307 | |
| 308 | if (crtc->funcs->disable_vblank) { |
| 309 | crtc->funcs->disable_vblank(crtc); |
| 310 | return; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | dev->driver->disable_vblank(dev, pipe); |
| 315 | } |
| 316 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 317 | /* |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 318 | * Disable vblank irq's on crtc, make sure that last vblank count |
| 319 | * of hardware and corresponding consistent software vblank counter |
| 320 | * are preserved, even if there are any spurious vblank irq's after |
| 321 | * disable. |
| 322 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 323 | static void vblank_disable_and_save(struct drm_device *dev, unsigned int pipe) |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 324 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 325 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 326 | unsigned long irqflags; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 327 | |
Chris Wilson | 43dc7fe | 2017-03-17 20:20:27 +0000 | [diff] [blame] | 328 | assert_spin_locked(&dev->vbl_lock); |
| 329 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 330 | /* Prevent vblank irq processing while disabling vblank irqs, |
| 331 | * so no updates of timestamps or count can happen after we've |
| 332 | * disabled. Needed to prevent races in case of delayed irq's. |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 333 | */ |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 334 | spin_lock_irqsave(&dev->vblank_time_lock, irqflags); |
| 335 | |
Ville Syrjälä | 812e746 | 2014-08-06 14:49:48 +0300 | [diff] [blame] | 336 | /* |
Laurent Pinchart | eb2ed66 | 2015-01-29 01:09:24 +0200 | [diff] [blame] | 337 | * Only disable vblank interrupts if they're enabled. This avoids |
| 338 | * calling the ->disable_vblank() operation in atomic context with the |
| 339 | * hardware potentially runtime suspended. |
| 340 | */ |
Chris Wilson | f5f4c61 | 2017-03-30 15:08:32 +0100 | [diff] [blame] | 341 | if (vblank->enabled) { |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 342 | __disable_vblank(dev, pipe); |
Chris Wilson | f5f4c61 | 2017-03-30 15:08:32 +0100 | [diff] [blame] | 343 | vblank->enabled = false; |
| 344 | } |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 345 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 346 | /* |
| 347 | * Always update the count and timestamp to maintain the |
| 348 | * appearance that the counter has been ticking all along until |
| 349 | * this time. This makes the count account for the entire time |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 350 | * between drm_crtc_vblank_on() and drm_crtc_vblank_off(). |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 351 | */ |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 352 | drm_update_vblank_count(dev, pipe, 0); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 353 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 354 | spin_unlock_irqrestore(&dev->vblank_time_lock, irqflags); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 355 | } |
| 356 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 357 | static void vblank_disable_fn(unsigned long arg) |
| 358 | { |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 359 | struct drm_vblank_crtc *vblank = (void *)arg; |
| 360 | struct drm_device *dev = vblank->dev; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 361 | unsigned int pipe = vblank->pipe; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 362 | unsigned long irqflags; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 363 | |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 364 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
| 365 | if (atomic_read(&vblank->refcount) == 0 && vblank->enabled) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 366 | DRM_DEBUG("disabling vblank on crtc %u\n", pipe); |
| 367 | vblank_disable_and_save(dev, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 368 | } |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 369 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 370 | } |
| 371 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 372 | /** |
| 373 | * drm_vblank_cleanup - cleanup vblank support |
| 374 | * @dev: DRM device |
| 375 | * |
| 376 | * This function cleans up any resources allocated in drm_vblank_init. |
| 377 | */ |
Keith Packard | 5244021 | 2008-11-18 09:30:25 -0800 | [diff] [blame] | 378 | void drm_vblank_cleanup(struct drm_device *dev) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 379 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 380 | unsigned int pipe; |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 381 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 382 | /* Bail if the driver didn't call drm_vblank_init() */ |
| 383 | if (dev->num_crtcs == 0) |
| 384 | return; |
| 385 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 386 | for (pipe = 0; pipe < dev->num_crtcs; pipe++) { |
| 387 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 388 | |
Chris Wilson | 43dc7fe | 2017-03-17 20:20:27 +0000 | [diff] [blame] | 389 | WARN_ON(READ_ONCE(vblank->enabled) && |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 390 | drm_core_check_feature(dev, DRIVER_MODESET)); |
Mario Kleiner | 2368ffb | 2014-08-06 03:22:46 +0200 | [diff] [blame] | 391 | |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 392 | del_timer_sync(&vblank->disable_timer); |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 393 | } |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 394 | |
Ville Syrjälä | 5380e92 | 2013-10-04 14:53:36 +0300 | [diff] [blame] | 395 | kfree(dev->vblank); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 396 | |
| 397 | dev->num_crtcs = 0; |
| 398 | } |
Jerome Glisse | e77cef9 | 2010-01-07 15:39:13 +0100 | [diff] [blame] | 399 | EXPORT_SYMBOL(drm_vblank_cleanup); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 400 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 401 | /** |
| 402 | * drm_vblank_init - initialize vblank support |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 403 | * @dev: DRM device |
| 404 | * @num_crtcs: number of CRTCs supported by @dev |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 405 | * |
| 406 | * This function initializes vblank support for @num_crtcs display pipelines. |
| 407 | * |
| 408 | * Returns: |
| 409 | * Zero on success or a negative error code on failure. |
| 410 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 411 | int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 412 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 413 | int ret = -ENOMEM; |
| 414 | unsigned int i; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 415 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 416 | spin_lock_init(&dev->vbl_lock); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 417 | spin_lock_init(&dev->vblank_time_lock); |
| 418 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 419 | dev->num_crtcs = num_crtcs; |
| 420 | |
Ville Syrjälä | 5380e92 | 2013-10-04 14:53:36 +0300 | [diff] [blame] | 421 | dev->vblank = kcalloc(num_crtcs, sizeof(*dev->vblank), GFP_KERNEL); |
| 422 | if (!dev->vblank) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 423 | goto err; |
| 424 | |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 425 | for (i = 0; i < num_crtcs; i++) { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 426 | struct drm_vblank_crtc *vblank = &dev->vblank[i]; |
| 427 | |
| 428 | vblank->dev = dev; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 429 | vblank->pipe = i; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 430 | init_waitqueue_head(&vblank->queue); |
| 431 | setup_timer(&vblank->disable_timer, vblank_disable_fn, |
| 432 | (unsigned long)vblank); |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 433 | seqlock_init(&vblank->seqlock); |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 434 | } |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 435 | |
Mario Kleiner | 8f6fce0 | 2013-10-30 05:13:06 +0100 | [diff] [blame] | 436 | DRM_INFO("Supports vblank timestamp caching Rev 2 (21.10.2013).\n"); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 437 | |
| 438 | /* Driver specific high-precision vblank timestamping supported? */ |
| 439 | if (dev->driver->get_vblank_timestamp) |
| 440 | DRM_INFO("Driver supports precise vblank timestamp query.\n"); |
| 441 | else |
| 442 | DRM_INFO("No driver support for vblank timestamp query.\n"); |
| 443 | |
Mario Kleiner | 5a8b21b | 2015-05-04 06:29:45 +0200 | [diff] [blame] | 444 | /* Must have precise timestamping for reliable vblank instant disable */ |
| 445 | if (dev->vblank_disable_immediate && !dev->driver->get_vblank_timestamp) { |
| 446 | dev->vblank_disable_immediate = false; |
| 447 | DRM_INFO("Setting vblank_disable_immediate to false because " |
| 448 | "get_vblank_timestamp == NULL\n"); |
| 449 | } |
| 450 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 451 | return 0; |
| 452 | |
| 453 | err: |
Mario Kleiner | 79a093ae | 2014-08-06 03:22:44 +0200 | [diff] [blame] | 454 | dev->num_crtcs = 0; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 455 | return ret; |
| 456 | } |
| 457 | EXPORT_SYMBOL(drm_vblank_init); |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | /** |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 460 | * drm_irq_install - install IRQ handler |
| 461 | * @dev: DRM device |
| 462 | * @irq: IRQ number to install the handler for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | * |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 464 | * Initializes the IRQ related data. Installs the handler, calling the driver |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 465 | * irq_preinstall() and irq_postinstall() functions before and after the |
| 466 | * installation. |
| 467 | * |
| 468 | * This is the simplified helper interface provided for drivers with no special |
| 469 | * needs. Drivers which need to install interrupt handlers for multiple |
Daniel Vetter | ef40cbf9 | 2017-01-25 07:26:47 +0100 | [diff] [blame] | 470 | * interrupts must instead set &drm_device.irq_enabled to signal the DRM core |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 471 | * that vblank interrupts are available. |
| 472 | * |
| 473 | * Returns: |
| 474 | * Zero on success or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | */ |
Daniel Vetter | bb0f1b5 | 2013-11-03 21:09:27 +0100 | [diff] [blame] | 476 | int drm_irq_install(struct drm_device *dev, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | { |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 478 | int ret; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 479 | unsigned long sh_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) |
| 482 | return -EINVAL; |
| 483 | |
Daniel Vetter | 7c1a38e3 | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 484 | if (irq == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | return -EINVAL; |
| 486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | /* Driver must have been initialized */ |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 488 | if (!dev->dev_private) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 491 | if (dev->irq_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | return -EBUSY; |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 493 | dev->irq_enabled = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Daniel Vetter | 7c1a38e3 | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 495 | DRM_DEBUG("irq=%d\n", irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 497 | /* Before installing handler */ |
Joonyoung Shim | 5037f8a | 2011-08-04 05:41:01 +0000 | [diff] [blame] | 498 | if (dev->driver->irq_preinstall) |
| 499 | dev->driver->irq_preinstall(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 501 | /* Install handler */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED)) |
Thomas Gleixner | 935f6e3 | 2006-07-01 19:29:34 -0700 | [diff] [blame] | 503 | sh_flags = IRQF_SHARED; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 504 | |
Daniel Vetter | 7c1a38e3 | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 505 | ret = request_irq(irq, dev->driver->irq_handler, |
Daniel Vetter | 5829d18 | 2013-11-03 21:48:48 +0100 | [diff] [blame] | 506 | sh_flags, dev->driver->name, dev); |
Jesse Barnes | 9bfbd5c | 2008-09-15 15:00:33 -0700 | [diff] [blame] | 507 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 508 | if (ret < 0) { |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 509 | dev->irq_enabled = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | return ret; |
| 511 | } |
| 512 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 513 | /* After installing handler */ |
Joonyoung Shim | 5037f8a | 2011-08-04 05:41:01 +0000 | [diff] [blame] | 514 | if (dev->driver->irq_postinstall) |
| 515 | ret = dev->driver->irq_postinstall(dev); |
| 516 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 517 | if (ret < 0) { |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 518 | dev->irq_enabled = false; |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 519 | if (drm_core_check_feature(dev, DRIVER_LEGACY)) |
Joonyoung Shim | e1c44ac | 2011-08-04 05:41:00 +0000 | [diff] [blame] | 520 | vga_client_register(dev->pdev, NULL, NULL, NULL); |
Daniel Vetter | 7c1a38e3 | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 521 | free_irq(irq, dev); |
| 522 | } else { |
| 523 | dev->irq = irq; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 524 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 526 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | } |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 528 | EXPORT_SYMBOL(drm_irq_install); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
| 530 | /** |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 531 | * drm_irq_uninstall - uninstall the IRQ handler |
| 532 | * @dev: DRM device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 534 | * Calls the driver's irq_uninstall() function and unregisters the IRQ handler. |
| 535 | * This should only be called by drivers which used drm_irq_install() to set up |
| 536 | * their interrupt handler. Other drivers must only reset |
Daniel Vetter | ef40cbf9 | 2017-01-25 07:26:47 +0100 | [diff] [blame] | 537 | * &drm_device.irq_enabled to false. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 539 | * Note that for kernel modesetting drivers it is a bug if this function fails. |
| 540 | * The sanity checks are only to catch buggy user modesetting drivers which call |
| 541 | * the same function through an ioctl. |
| 542 | * |
| 543 | * Returns: |
| 544 | * Zero on success or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | */ |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 546 | int drm_irq_uninstall(struct drm_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | { |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 548 | unsigned long irqflags; |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 549 | bool irq_enabled; |
| 550 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
| 552 | if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) |
| 553 | return -EINVAL; |
| 554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | irq_enabled = dev->irq_enabled; |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 556 | dev->irq_enabled = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 558 | /* |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 559 | * Wake up any waiters so they don't hang. This is just to paper over |
Frank Binns | c78d1ca2 | 2016-06-24 11:15:37 +0100 | [diff] [blame] | 560 | * issues for UMS drivers which aren't in full control of their |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 561 | * vblank/irq handling. KMS drivers must ensure that vblanks are all |
| 562 | * disabled when uninstalling the irq handler. |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 563 | */ |
Ben Skeggs | bde4889 | 2011-07-04 12:52:27 +1000 | [diff] [blame] | 564 | if (dev->num_crtcs) { |
| 565 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
| 566 | for (i = 0; i < dev->num_crtcs; i++) { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 567 | struct drm_vblank_crtc *vblank = &dev->vblank[i]; |
| 568 | |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 569 | if (!vblank->enabled) |
| 570 | continue; |
| 571 | |
| 572 | WARN_ON(drm_core_check_feature(dev, DRIVER_MODESET)); |
| 573 | |
| 574 | vblank_disable_and_save(dev, i); |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 575 | wake_up(&vblank->queue); |
Ben Skeggs | bde4889 | 2011-07-04 12:52:27 +1000 | [diff] [blame] | 576 | } |
| 577 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 578 | } |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 579 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 580 | if (!irq_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | return -EINVAL; |
| 582 | |
Daniel Vetter | 7c1a38e3 | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 583 | DRM_DEBUG("irq=%d\n", dev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 585 | if (drm_core_check_feature(dev, DRIVER_LEGACY)) |
Dave Airlie | 28d5204 | 2009-09-21 14:33:58 +1000 | [diff] [blame] | 586 | vga_client_register(dev->pdev, NULL, NULL, NULL); |
| 587 | |
Joonyoung Shim | 5037f8a | 2011-08-04 05:41:01 +0000 | [diff] [blame] | 588 | if (dev->driver->irq_uninstall) |
| 589 | dev->driver->irq_uninstall(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
Daniel Vetter | 7c1a38e3 | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 591 | free_irq(dev->irq, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
| 593 | return 0; |
| 594 | } |
| 595 | EXPORT_SYMBOL(drm_irq_uninstall); |
| 596 | |
Daniel Vetter | 25a9939 | 2016-12-14 00:08:02 +0100 | [diff] [blame] | 597 | int drm_legacy_irq_control(struct drm_device *dev, void *data, |
| 598 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 600 | struct drm_control *ctl = data; |
Daniel Vetter | a319c1a | 2013-11-03 21:09:15 +0100 | [diff] [blame] | 601 | int ret = 0, irq; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 602 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 603 | /* if we haven't irq we fallback for compatibility reasons - |
| 604 | * this used to be a separate function in drm_dma.h |
| 605 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
Daniel Vetter | 22471cf | 2013-11-03 20:02:50 +0100 | [diff] [blame] | 607 | if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) |
| 608 | return 0; |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 609 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Daniel Vetter | 22471cf | 2013-11-03 20:02:50 +0100 | [diff] [blame] | 610 | return 0; |
Frank Binns | c78d1ca2 | 2016-06-24 11:15:37 +0100 | [diff] [blame] | 611 | /* UMS was only ever supported on pci devices. */ |
Daniel Vetter | 22471cf | 2013-11-03 20:02:50 +0100 | [diff] [blame] | 612 | if (WARN_ON(!dev->pdev)) |
| 613 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 615 | switch (ctl->func) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | case DRM_INST_HANDLER: |
Daniel Vetter | a319c1a | 2013-11-03 21:09:15 +0100 | [diff] [blame] | 617 | irq = dev->pdev->irq; |
| 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | if (dev->if_version < DRM_IF_VERSION(1, 2) && |
Daniel Vetter | a319c1a | 2013-11-03 21:09:15 +0100 | [diff] [blame] | 620 | ctl->irq != irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | return -EINVAL; |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 622 | mutex_lock(&dev->struct_mutex); |
Daniel Vetter | bb0f1b5 | 2013-11-03 21:09:27 +0100 | [diff] [blame] | 623 | ret = drm_irq_install(dev, irq); |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 624 | mutex_unlock(&dev->struct_mutex); |
| 625 | |
| 626 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | case DRM_UNINST_HANDLER: |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 628 | mutex_lock(&dev->struct_mutex); |
| 629 | ret = drm_irq_uninstall(dev); |
| 630 | mutex_unlock(&dev->struct_mutex); |
| 631 | |
| 632 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | default: |
| 634 | return -EINVAL; |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | /** |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 639 | * drm_calc_timestamping_constants - calculate vblank timestamp constants |
| 640 | * @crtc: drm_crtc whose timestamp constants should be updated. |
| 641 | * @mode: display mode containing the scanout timings |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 642 | * |
Ville Syrjälä | 21b2156 | 2013-10-26 17:22:52 +0300 | [diff] [blame] | 643 | * Calculate and store various constants which are later |
| 644 | * needed by vblank and swap-completion timestamping, e.g, |
| 645 | * by drm_calc_vbltimestamp_from_scanoutpos(). They are |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 646 | * derived from CRTC's true scanout timing, so they take |
Ville Syrjälä | 21b2156 | 2013-10-26 17:22:52 +0300 | [diff] [blame] | 647 | * things like panel scaling or other adjustments into account. |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 648 | */ |
Ville Syrjälä | 545cdd5 | 2013-10-26 17:16:30 +0300 | [diff] [blame] | 649 | void drm_calc_timestamping_constants(struct drm_crtc *crtc, |
| 650 | const struct drm_display_mode *mode) |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 651 | { |
Ville Syrjälä | 0c545ac | 2015-11-12 14:34:18 +0200 | [diff] [blame] | 652 | struct drm_device *dev = crtc->dev; |
| 653 | unsigned int pipe = drm_crtc_index(crtc); |
| 654 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 20b2020 | 2015-09-14 22:43:45 +0300 | [diff] [blame] | 655 | int linedur_ns = 0, framedur_ns = 0; |
Ville Syrjälä | 77666b72 | 2013-10-27 21:22:58 +0200 | [diff] [blame] | 656 | int dotclock = mode->crtc_clock; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 657 | |
Ville Syrjälä | 0c545ac | 2015-11-12 14:34:18 +0200 | [diff] [blame] | 658 | if (!dev->num_crtcs) |
| 659 | return; |
| 660 | |
| 661 | if (WARN_ON(pipe >= dev->num_crtcs)) |
| 662 | return; |
| 663 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 664 | /* Valid dotclock? */ |
| 665 | if (dotclock > 0) { |
Ville Syrjälä | 0dae35a | 2013-10-26 17:11:01 +0300 | [diff] [blame] | 666 | int frame_size = mode->crtc_htotal * mode->crtc_vtotal; |
| 667 | |
| 668 | /* |
| 669 | * Convert scanline length in pixels and video |
Ville Syrjälä | 20b2020 | 2015-09-14 22:43:45 +0300 | [diff] [blame] | 670 | * dot clock to line duration and frame duration |
| 671 | * in nanoseconds: |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 672 | */ |
Ville Syrjälä | 0dae35a | 2013-10-26 17:11:01 +0300 | [diff] [blame] | 673 | linedur_ns = div_u64((u64) mode->crtc_htotal * 1000000, dotclock); |
| 674 | framedur_ns = div_u64((u64) frame_size * 1000000, dotclock); |
Ville Syrjälä | c0ae24c | 2013-10-28 19:53:25 +0200 | [diff] [blame] | 675 | |
| 676 | /* |
| 677 | * Fields of interlaced scanout modes are only half a frame duration. |
| 678 | */ |
| 679 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
| 680 | framedur_ns /= 2; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 681 | } else |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 682 | DRM_ERROR("crtc %u: Can't calculate constants, dotclock = 0!\n", |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 683 | crtc->base.id); |
| 684 | |
Ville Syrjälä | eba1f35 | 2015-09-14 22:43:43 +0300 | [diff] [blame] | 685 | vblank->linedur_ns = linedur_ns; |
| 686 | vblank->framedur_ns = framedur_ns; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 687 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 688 | DRM_DEBUG("crtc %u: hwmode: htotal %d, vtotal %d, vdisplay %d\n", |
Ville Syrjälä | 545cdd5 | 2013-10-26 17:16:30 +0300 | [diff] [blame] | 689 | crtc->base.id, mode->crtc_htotal, |
| 690 | mode->crtc_vtotal, mode->crtc_vdisplay); |
Ville Syrjälä | 20b2020 | 2015-09-14 22:43:45 +0300 | [diff] [blame] | 691 | DRM_DEBUG("crtc %u: clock %d kHz framedur %d linedur %d\n", |
| 692 | crtc->base.id, dotclock, framedur_ns, linedur_ns); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 693 | } |
| 694 | EXPORT_SYMBOL(drm_calc_timestamping_constants); |
| 695 | |
| 696 | /** |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 697 | * drm_calc_vbltimestamp_from_scanoutpos - precise vblank timestamp helper |
| 698 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 699 | * @pipe: index of CRTC whose vblank timestamp to retrieve |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 700 | * @max_error: Desired maximum allowable error in timestamps (nanosecs) |
| 701 | * On return contains true maximum error of timestamp |
| 702 | * @vblank_time: Pointer to struct timeval which should receive the timestamp |
| 703 | * @flags: Flags to pass to driver: |
| 704 | * 0 = Default, |
| 705 | * DRM_CALLED_FROM_VBLIRQ = If function is called from vbl IRQ handler |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 706 | * @mode: mode which defines the scanout timings |
| 707 | * |
| 708 | * Implements calculation of exact vblank timestamps from given drm_display_mode |
| 709 | * timings and current video scanout position of a CRTC. This can be called from |
| 710 | * within get_vblank_timestamp() implementation of a kms driver to implement the |
| 711 | * actual timestamping. |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 712 | * |
| 713 | * Should return timestamps conforming to the OML_sync_control OpenML |
| 714 | * extension specification. The timestamp corresponds to the end of |
| 715 | * the vblank interval, aka start of scanout of topmost-leftmost display |
| 716 | * pixel in the following video frame. |
| 717 | * |
| 718 | * Requires support for optional dev->driver->get_scanout_position() |
| 719 | * in kms driver, plus a bit of setup code to provide a drm_display_mode |
| 720 | * that corresponds to the true scanout timing. |
| 721 | * |
| 722 | * The current implementation only handles standard video modes. It |
| 723 | * returns as no operation if a doublescan or interlaced video mode is |
| 724 | * active. Higher level code is expected to handle this. |
| 725 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 726 | * Returns: |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 727 | * |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 728 | * Returns true on success, and false on failure, i.e. when no accurate |
| 729 | * timestamp could be acquired. |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 730 | */ |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 731 | bool drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, |
| 732 | unsigned int pipe, |
| 733 | int *max_error, |
| 734 | struct timeval *vblank_time, |
| 735 | unsigned flags, |
| 736 | const struct drm_display_mode *mode) |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 737 | { |
Imre Deak | e62f2f5 | 2012-10-23 18:53:25 +0000 | [diff] [blame] | 738 | struct timeval tv_etime; |
Thomas Gleixner | d2cb58c | 2014-07-16 21:04:26 +0000 | [diff] [blame] | 739 | ktime_t stime, etime; |
Ville Syrjälä | ad1716e | 2015-09-14 22:43:49 +0300 | [diff] [blame] | 740 | unsigned int vbl_status; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 741 | int vpos, hpos, i; |
Ville Syrjälä | 3bb403b | 2015-09-14 22:43:44 +0300 | [diff] [blame] | 742 | int delta_ns, duration_ns; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 743 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 744 | if (pipe >= dev->num_crtcs) { |
| 745 | DRM_ERROR("Invalid crtc %u\n", pipe); |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 746 | return false; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | /* Scanout position query not supported? Should not happen. */ |
| 750 | if (!dev->driver->get_scanout_position) { |
| 751 | DRM_ERROR("Called from driver w/o get_scanout_position()!?\n"); |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 752 | return false; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 753 | } |
| 754 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 755 | /* If mode timing undefined, just return as no-op: |
| 756 | * Happens during initial modesetting of a crtc. |
| 757 | */ |
Ville Syrjälä | 3bb403b | 2015-09-14 22:43:44 +0300 | [diff] [blame] | 758 | if (mode->crtc_clock == 0) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 759 | DRM_DEBUG("crtc %u: Noop due to uninitialized mode.\n", pipe); |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 760 | return false; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 761 | } |
| 762 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 763 | /* Get current scanout position with system timestamp. |
| 764 | * Repeat query up to DRM_TIMESTAMP_MAXRETRIES times |
| 765 | * if single query takes longer than max_error nanoseconds. |
| 766 | * |
| 767 | * This guarantees a tight bound on maximum error if |
| 768 | * code gets preempted or delayed for some reason. |
| 769 | */ |
| 770 | for (i = 0; i < DRM_TIMESTAMP_MAXRETRIES; i++) { |
Mario Kleiner | 8f6fce0 | 2013-10-30 05:13:06 +0100 | [diff] [blame] | 771 | /* |
| 772 | * Get vertical and horizontal scanout position vpos, hpos, |
| 773 | * and bounding timestamps stime, etime, pre/post query. |
| 774 | */ |
Ville Syrjälä | 3bb403b | 2015-09-14 22:43:44 +0300 | [diff] [blame] | 775 | vbl_status = dev->driver->get_scanout_position(dev, pipe, flags, |
| 776 | &vpos, &hpos, |
| 777 | &stime, &etime, |
| 778 | mode); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 779 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 780 | /* Return as no-op if scanout query unsupported or failed. */ |
| 781 | if (!(vbl_status & DRM_SCANOUTPOS_VALID)) { |
Ville Syrjälä | ad1716e | 2015-09-14 22:43:49 +0300 | [diff] [blame] | 782 | DRM_DEBUG("crtc %u : scanoutpos query failed [0x%x].\n", |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 783 | pipe, vbl_status); |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 784 | return false; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 785 | } |
| 786 | |
Mario Kleiner | 8f6fce0 | 2013-10-30 05:13:06 +0100 | [diff] [blame] | 787 | /* Compute uncertainty in timestamp of scanout position query. */ |
Imre Deak | e62f2f5 | 2012-10-23 18:53:25 +0000 | [diff] [blame] | 788 | duration_ns = ktime_to_ns(etime) - ktime_to_ns(stime); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 789 | |
| 790 | /* Accept result with < max_error nsecs timing uncertainty. */ |
Ville Syrjälä | 3c184f6 | 2013-10-26 17:38:52 +0300 | [diff] [blame] | 791 | if (duration_ns <= *max_error) |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 792 | break; |
| 793 | } |
| 794 | |
| 795 | /* Noisy system timing? */ |
| 796 | if (i == DRM_TIMESTAMP_MAXRETRIES) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 797 | DRM_DEBUG("crtc %u: Noisy timestamp %d us > %d us [%d reps].\n", |
| 798 | pipe, duration_ns/1000, *max_error/1000, i); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | /* Return upper bound of timestamp precision error. */ |
Ville Syrjälä | 3c184f6 | 2013-10-26 17:38:52 +0300 | [diff] [blame] | 802 | *max_error = duration_ns; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 803 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 804 | /* Convert scanout position into elapsed time at raw_time query |
| 805 | * since start of scanout at first display scanline. delta_ns |
| 806 | * can be negative if start of scanout hasn't happened yet. |
| 807 | */ |
Ville Syrjälä | 3bb403b | 2015-09-14 22:43:44 +0300 | [diff] [blame] | 808 | delta_ns = div_s64(1000000LL * (vpos * mode->crtc_htotal + hpos), |
| 809 | mode->crtc_clock); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 810 | |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 811 | if (!drm_timestamp_monotonic) |
Thomas Gleixner | d2cb58c | 2014-07-16 21:04:26 +0000 | [diff] [blame] | 812 | etime = ktime_mono_to_real(etime); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 813 | |
Imre Deak | e62f2f5 | 2012-10-23 18:53:25 +0000 | [diff] [blame] | 814 | /* save this only for debugging purposes */ |
| 815 | tv_etime = ktime_to_timeval(etime); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 816 | /* Subtract time delta from raw timestamp to get final |
| 817 | * vblank_time timestamp for end of vblank. |
| 818 | */ |
Daniel Vetter | a91d7b9 | 2016-03-29 13:12:22 +0200 | [diff] [blame] | 819 | etime = ktime_sub_ns(etime, delta_ns); |
Imre Deak | e62f2f5 | 2012-10-23 18:53:25 +0000 | [diff] [blame] | 820 | *vblank_time = ktime_to_timeval(etime); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 821 | |
Ville Syrjälä | 235fabe | 2015-10-09 22:57:37 +0300 | [diff] [blame] | 822 | DRM_DEBUG_VBL("crtc %u : v 0x%x p(%d,%d)@ %ld.%ld -> %ld.%ld [e %d us, %d rep]\n", |
| 823 | pipe, vbl_status, hpos, vpos, |
| 824 | (long)tv_etime.tv_sec, (long)tv_etime.tv_usec, |
| 825 | (long)vblank_time->tv_sec, (long)vblank_time->tv_usec, |
| 826 | duration_ns/1000, i); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 827 | |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 828 | return true; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 829 | } |
| 830 | EXPORT_SYMBOL(drm_calc_vbltimestamp_from_scanoutpos); |
| 831 | |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 832 | static struct timeval get_drm_timestamp(void) |
| 833 | { |
| 834 | ktime_t now; |
| 835 | |
Thomas Gleixner | d2cb58c | 2014-07-16 21:04:26 +0000 | [diff] [blame] | 836 | now = drm_timestamp_monotonic ? ktime_get() : ktime_get_real(); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 837 | return ktime_to_timeval(now); |
| 838 | } |
| 839 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 840 | /** |
| 841 | * drm_get_last_vbltimestamp - retrieve raw timestamp for the most recent |
Thierry Reding | 4dfd909 | 2014-12-10 13:03:34 +0100 | [diff] [blame] | 842 | * vblank interval |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 843 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 844 | * @pipe: index of CRTC whose vblank timestamp to retrieve |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 845 | * @tvblank: Pointer to target struct timeval which should receive the timestamp |
| 846 | * @flags: Flags to pass to driver: |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 847 | * 0 = Default, |
| 848 | * DRM_CALLED_FROM_VBLIRQ = If function is called from vbl IRQ handler |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 849 | * |
| 850 | * Fetches the system timestamp corresponding to the time of the most recent |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 851 | * vblank interval on specified CRTC. May call into kms-driver to |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 852 | * compute the timestamp with a high-precision GPU specific method. |
| 853 | * |
| 854 | * Returns zero if timestamp originates from uncorrected do_gettimeofday() |
| 855 | * call, i.e., it isn't very precisely locked to the true vblank. |
| 856 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 857 | * Returns: |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 858 | * True if timestamp is considered to be very precise, false otherwise. |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 859 | */ |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 860 | static bool |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 861 | drm_get_last_vbltimestamp(struct drm_device *dev, unsigned int pipe, |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 862 | struct timeval *tvblank, unsigned flags) |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 863 | { |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 864 | bool ret = false; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 865 | |
| 866 | /* Define requested maximum error on timestamps (nanoseconds). */ |
| 867 | int max_error = (int) drm_timestamp_precision * 1000; |
| 868 | |
| 869 | /* Query driver if possible and precision timestamping enabled. */ |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 870 | if (dev->driver->get_vblank_timestamp && (max_error > 0)) |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 871 | ret = dev->driver->get_vblank_timestamp(dev, pipe, &max_error, |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 872 | tvblank, flags); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 873 | |
| 874 | /* GPU high precision timestamp query unsupported or failed. |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 875 | * Return current monotonic/gettimeofday timestamp as best estimate. |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 876 | */ |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 877 | if (!ret) |
| 878 | *tvblank = get_drm_timestamp(); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 879 | |
Daniel Vetter | d673c02 | 2017-05-09 16:03:25 +0200 | [diff] [blame^] | 880 | return ret; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 881 | } |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 882 | |
| 883 | /** |
Thierry Reding | 96d3f91 | 2014-12-16 13:08:47 +0100 | [diff] [blame] | 884 | * drm_crtc_vblank_count - retrieve "cooked" vblank counter value |
| 885 | * @crtc: which counter to retrieve |
| 886 | * |
| 887 | * Fetches the "cooked" vblank count value that represents the number of |
| 888 | * vblank events since the system was booted, including lost events due to |
| 889 | * modesetting activity. |
| 890 | * |
Thierry Reding | 96d3f91 | 2014-12-16 13:08:47 +0100 | [diff] [blame] | 891 | * Returns: |
| 892 | * The software vblank counter. |
| 893 | */ |
| 894 | u32 drm_crtc_vblank_count(struct drm_crtc *crtc) |
| 895 | { |
| 896 | return drm_vblank_count(crtc->dev, drm_crtc_index(crtc)); |
| 897 | } |
| 898 | EXPORT_SYMBOL(drm_crtc_vblank_count); |
| 899 | |
| 900 | /** |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 901 | * drm_vblank_count_and_time - retrieve "cooked" vblank counter value and the |
| 902 | * system timestamp corresponding to that vblank counter value. |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 903 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 904 | * @pipe: index of CRTC whose counter to retrieve |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 905 | * @vblanktime: Pointer to struct timeval to receive the vblank timestamp. |
| 906 | * |
| 907 | * Fetches the "cooked" vblank count value that represents the number of |
| 908 | * vblank events since the system was booted, including lost events due to |
| 909 | * modesetting activity. Returns corresponding system timestamp of the time |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 910 | * of the vblank interval that corresponds to the current vblank counter value. |
Thierry Reding | cf64830 | 2015-09-24 18:35:36 +0200 | [diff] [blame] | 911 | * |
| 912 | * This is the legacy version of drm_crtc_vblank_count_and_time(). |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 913 | */ |
Gustavo Padovan | 6e5f73f | 2016-07-04 21:04:47 -0300 | [diff] [blame] | 914 | static u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe, |
| 915 | struct timeval *vblanktime) |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 916 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 917 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 918 | u32 vblank_count; |
| 919 | unsigned int seq; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 920 | |
Arnd Bergmann | cff52e5 | 2016-10-18 00:13:39 +0200 | [diff] [blame] | 921 | if (WARN_ON(pipe >= dev->num_crtcs)) { |
| 922 | *vblanktime = (struct timeval) { 0 }; |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 923 | return 0; |
Arnd Bergmann | cff52e5 | 2016-10-18 00:13:39 +0200 | [diff] [blame] | 924 | } |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 925 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 926 | do { |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 927 | seq = read_seqbegin(&vblank->seqlock); |
| 928 | vblank_count = vblank->count; |
| 929 | *vblanktime = vblank->time; |
| 930 | } while (read_seqretry(&vblank->seqlock, seq)); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 931 | |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 932 | return vblank_count; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 933 | } |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 934 | |
Thierry Reding | cf64830 | 2015-09-24 18:35:36 +0200 | [diff] [blame] | 935 | /** |
| 936 | * drm_crtc_vblank_count_and_time - retrieve "cooked" vblank counter value |
| 937 | * and the system timestamp corresponding to that vblank counter value |
| 938 | * @crtc: which counter to retrieve |
| 939 | * @vblanktime: Pointer to struct timeval to receive the vblank timestamp. |
| 940 | * |
| 941 | * Fetches the "cooked" vblank count value that represents the number of |
| 942 | * vblank events since the system was booted, including lost events due to |
| 943 | * modesetting activity. Returns corresponding system timestamp of the time |
| 944 | * of the vblank interval that corresponds to the current vblank counter value. |
Thierry Reding | cf64830 | 2015-09-24 18:35:36 +0200 | [diff] [blame] | 945 | */ |
| 946 | u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc, |
| 947 | struct timeval *vblanktime) |
| 948 | { |
| 949 | return drm_vblank_count_and_time(crtc->dev, drm_crtc_index(crtc), |
| 950 | vblanktime); |
| 951 | } |
| 952 | EXPORT_SYMBOL(drm_crtc_vblank_count_and_time); |
| 953 | |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 954 | static void send_vblank_event(struct drm_device *dev, |
| 955 | struct drm_pending_vblank_event *e, |
| 956 | unsigned long seq, struct timeval *now) |
| 957 | { |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 958 | e->event.sequence = seq; |
| 959 | e->event.tv_sec = now->tv_sec; |
| 960 | e->event.tv_usec = now->tv_usec; |
| 961 | |
Daniel Vetter | 7d52cb88 | 2017-03-08 15:12:43 +0100 | [diff] [blame] | 962 | trace_drm_vblank_event_delivered(e->base.file_priv, e->pipe, |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 963 | e->event.sequence); |
Matthew Auld | c001da4 | 2016-06-20 17:42:46 +0100 | [diff] [blame] | 964 | |
| 965 | drm_send_event_locked(dev, &e->base); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | /** |
Daniel Vetter | bbc8764 | 2015-11-10 17:37:31 +0100 | [diff] [blame] | 969 | * drm_crtc_arm_vblank_event - arm vblank event after pageflip |
| 970 | * @crtc: the source CRTC of the vblank event |
| 971 | * @e: the event to send |
| 972 | * |
| 973 | * A lot of drivers need to generate vblank events for the very next vblank |
| 974 | * interrupt. For example when the page flip interrupt happens when the page |
| 975 | * flip gets armed, but not when it actually executes within the next vblank |
| 976 | * period. This helper function implements exactly the required vblank arming |
| 977 | * behaviour. |
| 978 | * |
Daniel Vetter | ef40cbf9 | 2017-01-25 07:26:47 +0100 | [diff] [blame] | 979 | * NOTE: Drivers using this to send out the &drm_crtc_state.event as part of an |
| 980 | * atomic commit must ensure that the next vblank happens at exactly the same |
| 981 | * time as the atomic commit is committed to the hardware. This function itself |
| 982 | * does **not** protect again the next vblank interrupt racing with either this |
| 983 | * function call or the atomic commit operation. A possible sequence could be: |
Daniel Vetter | 6180213 | 2016-09-30 12:04:56 +0200 | [diff] [blame] | 984 | * |
| 985 | * 1. Driver commits new hardware state into vblank-synchronized registers. |
| 986 | * 2. A vblank happens, committing the hardware state. Also the corresponding |
| 987 | * vblank interrupt is fired off and fully processed by the interrupt |
| 988 | * handler. |
| 989 | * 3. The atomic commit operation proceeds to call drm_crtc_arm_vblank_event(). |
| 990 | * 4. The event is only send out for the next vblank, which is wrong. |
| 991 | * |
| 992 | * An equivalent race can happen when the driver calls |
| 993 | * drm_crtc_arm_vblank_event() before writing out the new hardware state. |
| 994 | * |
| 995 | * The only way to make this work safely is to prevent the vblank from firing |
| 996 | * (and the hardware from committing anything else) until the entire atomic |
| 997 | * commit sequence has run to completion. If the hardware does not have such a |
| 998 | * feature (e.g. using a "go" bit), then it is unsafe to use this functions. |
| 999 | * Instead drivers need to manually send out the event from their interrupt |
| 1000 | * handler by calling drm_crtc_send_vblank_event() and make sure that there's no |
| 1001 | * possible race with the hardware committing the atomic update. |
| 1002 | * |
Daniel Vetter | bbc8764 | 2015-11-10 17:37:31 +0100 | [diff] [blame] | 1003 | * Caller must hold event lock. Caller must also hold a vblank reference for |
| 1004 | * the event @e, which will be dropped when the next vblank arrives. |
Daniel Vetter | bbc8764 | 2015-11-10 17:37:31 +0100 | [diff] [blame] | 1005 | */ |
| 1006 | void drm_crtc_arm_vblank_event(struct drm_crtc *crtc, |
| 1007 | struct drm_pending_vblank_event *e) |
| 1008 | { |
Gustavo Padovan | 93507d1 | 2016-06-07 11:07:55 -0300 | [diff] [blame] | 1009 | struct drm_device *dev = crtc->dev; |
| 1010 | unsigned int pipe = drm_crtc_index(crtc); |
| 1011 | |
| 1012 | assert_spin_locked(&dev->event_lock); |
| 1013 | |
| 1014 | e->pipe = pipe; |
| 1015 | e->event.sequence = drm_vblank_count(dev, pipe); |
Ander Conselvan de Oliveira | 5db06a8 | 2017-04-04 17:52:21 +0100 | [diff] [blame] | 1016 | e->event.crtc_id = crtc->base.id; |
Gustavo Padovan | 93507d1 | 2016-06-07 11:07:55 -0300 | [diff] [blame] | 1017 | list_add_tail(&e->base.link, &dev->vblank_event_list); |
Daniel Vetter | bbc8764 | 2015-11-10 17:37:31 +0100 | [diff] [blame] | 1018 | } |
| 1019 | EXPORT_SYMBOL(drm_crtc_arm_vblank_event); |
| 1020 | |
| 1021 | /** |
Gustavo Padovan | db749b7e | 2016-06-07 11:07:54 -0300 | [diff] [blame] | 1022 | * drm_crtc_send_vblank_event - helper to send vblank event after pageflip |
| 1023 | * @crtc: the source CRTC of the vblank event |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1024 | * @e: the event to send |
| 1025 | * |
Daniel Vetter | 6180213 | 2016-09-30 12:04:56 +0200 | [diff] [blame] | 1026 | * Updates sequence # and timestamp on event for the most recently processed |
| 1027 | * vblank, and sends it to userspace. Caller must hold event lock. |
| 1028 | * |
| 1029 | * See drm_crtc_arm_vblank_event() for a helper which can be used in certain |
| 1030 | * situation, especially to send out events for atomic commit operations. |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1031 | */ |
Gustavo Padovan | db749b7e | 2016-06-07 11:07:54 -0300 | [diff] [blame] | 1032 | void drm_crtc_send_vblank_event(struct drm_crtc *crtc, |
| 1033 | struct drm_pending_vblank_event *e) |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1034 | { |
Gustavo Padovan | db749b7e | 2016-06-07 11:07:54 -0300 | [diff] [blame] | 1035 | struct drm_device *dev = crtc->dev; |
| 1036 | unsigned int seq, pipe = drm_crtc_index(crtc); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1037 | struct timeval now; |
Thierry Reding | 4dfd909 | 2014-12-10 13:03:34 +0100 | [diff] [blame] | 1038 | |
Thierry Reding | 2a7d3d6 | 2015-08-12 17:00:24 +0200 | [diff] [blame] | 1039 | if (dev->num_crtcs > 0) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1040 | seq = drm_vblank_count_and_time(dev, pipe, &now); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1041 | } else { |
| 1042 | seq = 0; |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 1043 | |
| 1044 | now = get_drm_timestamp(); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1045 | } |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1046 | e->pipe = pipe; |
Ander Conselvan de Oliveira | 5db06a8 | 2017-04-04 17:52:21 +0100 | [diff] [blame] | 1047 | e->event.crtc_id = crtc->base.id; |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1048 | send_vblank_event(dev, e, seq, &now); |
| 1049 | } |
Thierry Reding | a4d7b30 | 2014-12-15 14:47:18 +0100 | [diff] [blame] | 1050 | EXPORT_SYMBOL(drm_crtc_send_vblank_event); |
| 1051 | |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 1052 | static int __enable_vblank(struct drm_device *dev, unsigned int pipe) |
| 1053 | { |
| 1054 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 1055 | struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe); |
| 1056 | |
| 1057 | if (crtc->funcs->enable_vblank) |
| 1058 | return crtc->funcs->enable_vblank(crtc); |
| 1059 | } |
| 1060 | |
| 1061 | return dev->driver->enable_vblank(dev, pipe); |
| 1062 | } |
| 1063 | |
Thierry Reding | a4d7b30 | 2014-12-15 14:47:18 +0100 | [diff] [blame] | 1064 | /** |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1065 | * drm_vblank_enable - enable the vblank interrupt on a CRTC |
| 1066 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1067 | * @pipe: CRTC index |
Thierry Reding | c30e11f | 2015-08-12 17:00:33 +0200 | [diff] [blame] | 1068 | * |
| 1069 | * Returns: |
| 1070 | * Zero on success or a negative error code on failure. |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1071 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1072 | static int drm_vblank_enable(struct drm_device *dev, unsigned int pipe) |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1073 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1074 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1075 | int ret = 0; |
| 1076 | |
| 1077 | assert_spin_locked(&dev->vbl_lock); |
| 1078 | |
| 1079 | spin_lock(&dev->vblank_time_lock); |
| 1080 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1081 | if (!vblank->enabled) { |
Daniel Vetter | 1cfb80b | 2014-05-21 15:11:33 +0200 | [diff] [blame] | 1082 | /* |
| 1083 | * Enable vblank irqs under vblank_time_lock protection. |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1084 | * All vblank count & timestamp updates are held off |
| 1085 | * until we are done reinitializing master counter and |
| 1086 | * timestamps. Filtercode in drm_handle_vblank() will |
| 1087 | * prevent double-accounting of same vblank interval. |
| 1088 | */ |
Shawn Guo | 84e3548 | 2017-02-07 17:16:13 +0800 | [diff] [blame] | 1089 | ret = __enable_vblank(dev, pipe); |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1090 | DRM_DEBUG("enabling vblank on crtc %u, ret: %d\n", pipe, ret); |
Chris Wilson | 43dc7fe | 2017-03-17 20:20:27 +0000 | [diff] [blame] | 1091 | if (ret) { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1092 | atomic_dec(&vblank->refcount); |
Chris Wilson | 43dc7fe | 2017-03-17 20:20:27 +0000 | [diff] [blame] | 1093 | } else { |
Ville Syrjälä | a6e610d | 2015-09-14 22:43:47 +0300 | [diff] [blame] | 1094 | drm_update_vblank_count(dev, pipe, 0); |
Chris Wilson | 43dc7fe | 2017-03-17 20:20:27 +0000 | [diff] [blame] | 1095 | /* drm_update_vblank_count() includes a wmb so we just |
| 1096 | * need to ensure that the compiler emits the write |
| 1097 | * to mark the vblank as enabled after the call |
| 1098 | * to drm_update_vblank_count(). |
| 1099 | */ |
| 1100 | WRITE_ONCE(vblank->enabled, true); |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1101 | } |
| 1102 | } |
| 1103 | |
| 1104 | spin_unlock(&dev->vblank_time_lock); |
| 1105 | |
| 1106 | return ret; |
| 1107 | } |
| 1108 | |
| 1109 | /** |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1110 | * drm_vblank_get - get a reference count on vblank events |
| 1111 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1112 | * @pipe: index of CRTC to own |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1113 | * |
| 1114 | * Acquire a reference count on vblank events to avoid having them disabled |
| 1115 | * while in use. |
| 1116 | * |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1117 | * This is the legacy version of drm_crtc_vblank_get(). |
| 1118 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1119 | * Returns: |
Thierry Reding | c30e11f | 2015-08-12 17:00:33 +0200 | [diff] [blame] | 1120 | * Zero on success or a negative error code on failure. |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1121 | */ |
Gustavo Padovan | ceb7415 | 2016-06-07 11:07:56 -0300 | [diff] [blame] | 1122 | static int drm_vblank_get(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1123 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1124 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Peter Hurley | 97cbc88 | 2013-08-20 21:51:12 -0400 | [diff] [blame] | 1125 | unsigned long irqflags; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1126 | int ret = 0; |
| 1127 | |
Gerd Hoffmann | 16e3247 | 2015-03-30 12:50:50 +0200 | [diff] [blame] | 1128 | if (!dev->num_crtcs) |
| 1129 | return -EINVAL; |
| 1130 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1131 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1132 | return -EINVAL; |
| 1133 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1134 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
| 1135 | /* Going from 0->1 means we have to enable interrupts again */ |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1136 | if (atomic_add_return(1, &vblank->refcount) == 1) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1137 | ret = drm_vblank_enable(dev, pipe); |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1138 | } else { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1139 | if (!vblank->enabled) { |
| 1140 | atomic_dec(&vblank->refcount); |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1141 | ret = -EINVAL; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1142 | } |
| 1143 | } |
| 1144 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
| 1145 | |
| 1146 | return ret; |
| 1147 | } |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1148 | |
| 1149 | /** |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1150 | * drm_crtc_vblank_get - get a reference count on vblank events |
| 1151 | * @crtc: which CRTC to own |
| 1152 | * |
| 1153 | * Acquire a reference count on vblank events to avoid having them disabled |
| 1154 | * while in use. |
| 1155 | * |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1156 | * Returns: |
Thierry Reding | c30e11f | 2015-08-12 17:00:33 +0200 | [diff] [blame] | 1157 | * Zero on success or a negative error code on failure. |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1158 | */ |
| 1159 | int drm_crtc_vblank_get(struct drm_crtc *crtc) |
| 1160 | { |
| 1161 | return drm_vblank_get(crtc->dev, drm_crtc_index(crtc)); |
| 1162 | } |
| 1163 | EXPORT_SYMBOL(drm_crtc_vblank_get); |
| 1164 | |
| 1165 | /** |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1166 | * drm_vblank_put - release ownership of vblank events |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1167 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1168 | * @pipe: index of CRTC to release |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1169 | * |
| 1170 | * Release ownership of a given vblank counter, turning off interrupts |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1171 | * if possible. Disable interrupts after drm_vblank_offdelay milliseconds. |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1172 | * |
| 1173 | * This is the legacy version of drm_crtc_vblank_put(). |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1174 | */ |
Gustavo Padovan | ceb7415 | 2016-06-07 11:07:56 -0300 | [diff] [blame] | 1175 | static void drm_vblank_put(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1176 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1177 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1178 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1179 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | 7f907bf2 | 2014-11-08 10:16:19 -0500 | [diff] [blame] | 1180 | return; |
Chris Wilson | b3f5e73 | 2009-02-19 14:48:22 +0000 | [diff] [blame] | 1181 | |
Thierry Reding | 7d1de85 | 2015-08-12 17:00:30 +0200 | [diff] [blame] | 1182 | if (WARN_ON(atomic_read(&vblank->refcount) == 0)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1183 | return; |
| 1184 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1185 | /* Last user schedules interrupt disable */ |
Ville Syrjälä | 4ed0ce3 | 2014-08-06 14:49:53 +0300 | [diff] [blame] | 1186 | if (atomic_dec_and_test(&vblank->refcount)) { |
Daniel Vetter | ab8905f | 2014-09-10 17:36:08 +0200 | [diff] [blame] | 1187 | if (drm_vblank_offdelay == 0) |
| 1188 | return; |
Chris Wilson | 608b205 | 2017-03-15 20:40:25 +0000 | [diff] [blame] | 1189 | else if (drm_vblank_offdelay < 0) |
Ville Syrjälä | 4ed0ce3 | 2014-08-06 14:49:53 +0300 | [diff] [blame] | 1190 | vblank_disable_fn((unsigned long)vblank); |
Chris Wilson | 608b205 | 2017-03-15 20:40:25 +0000 | [diff] [blame] | 1191 | else if (!dev->vblank_disable_immediate) |
Ville Syrjälä | 4ed0ce3 | 2014-08-06 14:49:53 +0300 | [diff] [blame] | 1192 | mod_timer(&vblank->disable_timer, |
| 1193 | jiffies + ((drm_vblank_offdelay * HZ)/1000)); |
| 1194 | } |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1195 | } |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1196 | |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1197 | /** |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1198 | * drm_crtc_vblank_put - give up ownership of vblank events |
| 1199 | * @crtc: which counter to give up |
| 1200 | * |
| 1201 | * Release ownership of a given vblank counter, turning off interrupts |
| 1202 | * if possible. Disable interrupts after drm_vblank_offdelay milliseconds. |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1203 | */ |
| 1204 | void drm_crtc_vblank_put(struct drm_crtc *crtc) |
| 1205 | { |
| 1206 | drm_vblank_put(crtc->dev, drm_crtc_index(crtc)); |
| 1207 | } |
| 1208 | EXPORT_SYMBOL(drm_crtc_vblank_put); |
| 1209 | |
| 1210 | /** |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1211 | * drm_wait_one_vblank - wait for one vblank |
| 1212 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1213 | * @pipe: CRTC index |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1214 | * |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 1215 | * This waits for one vblank to pass on @pipe, using the irq driver interfaces. |
| 1216 | * It is a failure to call this when the vblank irq for @pipe is disabled, e.g. |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1217 | * due to lack of driver support or because the crtc is off. |
| 1218 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1219 | void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe) |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1220 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1221 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1222 | int ret; |
| 1223 | u32 last; |
| 1224 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1225 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Thierry Reding | 7d1de85 | 2015-08-12 17:00:30 +0200 | [diff] [blame] | 1226 | return; |
| 1227 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1228 | ret = drm_vblank_get(dev, pipe); |
| 1229 | if (WARN(ret, "vblank not available on crtc %i, ret=%i\n", pipe, ret)) |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1230 | return; |
| 1231 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1232 | last = drm_vblank_count(dev, pipe); |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1233 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1234 | ret = wait_event_timeout(vblank->queue, |
| 1235 | last != drm_vblank_count(dev, pipe), |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1236 | msecs_to_jiffies(100)); |
| 1237 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1238 | WARN(ret == 0, "vblank wait timed out on crtc %i\n", pipe); |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1239 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1240 | drm_vblank_put(dev, pipe); |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1241 | } |
| 1242 | EXPORT_SYMBOL(drm_wait_one_vblank); |
| 1243 | |
| 1244 | /** |
| 1245 | * drm_crtc_wait_one_vblank - wait for one vblank |
| 1246 | * @crtc: DRM crtc |
| 1247 | * |
| 1248 | * This waits for one vblank to pass on @crtc, using the irq driver interfaces. |
| 1249 | * It is a failure to call this when the vblank irq for @crtc is disabled, e.g. |
| 1250 | * due to lack of driver support or because the crtc is off. |
| 1251 | */ |
| 1252 | void drm_crtc_wait_one_vblank(struct drm_crtc *crtc) |
| 1253 | { |
| 1254 | drm_wait_one_vblank(crtc->dev, drm_crtc_index(crtc)); |
| 1255 | } |
| 1256 | EXPORT_SYMBOL(drm_crtc_wait_one_vblank); |
| 1257 | |
| 1258 | /** |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1259 | * drm_crtc_vblank_off - disable vblank events on a CRTC |
| 1260 | * @crtc: CRTC in question |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1261 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1262 | * Drivers can use this function to shut down the vblank interrupt handling when |
| 1263 | * disabling a crtc. This function ensures that the latest vblank frame count is |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1264 | * stored so that drm_vblank_on can restore it again. |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1265 | * |
| 1266 | * Drivers must use this function when the hardware vblank counter can get |
| 1267 | * reset, e.g. when suspending. |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1268 | */ |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1269 | void drm_crtc_vblank_off(struct drm_crtc *crtc) |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1270 | { |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1271 | struct drm_device *dev = crtc->dev; |
| 1272 | unsigned int pipe = drm_crtc_index(crtc); |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1273 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1274 | struct drm_pending_vblank_event *e, *t; |
| 1275 | struct timeval now; |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1276 | unsigned long irqflags; |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1277 | unsigned int seq; |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1278 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1279 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1280 | return; |
| 1281 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1282 | spin_lock_irqsave(&dev->event_lock, irqflags); |
| 1283 | |
| 1284 | spin_lock(&dev->vbl_lock); |
Mario Kleiner | e823589 | 2016-02-12 20:30:27 +0100 | [diff] [blame] | 1285 | DRM_DEBUG_VBL("crtc %d, vblank enabled %d, inmodeset %d\n", |
| 1286 | pipe, vblank->enabled, vblank->inmodeset); |
| 1287 | |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1288 | /* Avoid redundant vblank disables without previous |
| 1289 | * drm_crtc_vblank_on(). */ |
Mario Kleiner | e823589 | 2016-02-12 20:30:27 +0100 | [diff] [blame] | 1290 | if (drm_core_check_feature(dev, DRIVER_ATOMIC) || !vblank->inmodeset) |
| 1291 | vblank_disable_and_save(dev, pipe); |
| 1292 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1293 | wake_up(&vblank->queue); |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1294 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1295 | /* |
| 1296 | * Prevent subsequent drm_vblank_get() from re-enabling |
| 1297 | * the vblank interrupt by bumping the refcount. |
| 1298 | */ |
| 1299 | if (!vblank->inmodeset) { |
| 1300 | atomic_inc(&vblank->refcount); |
| 1301 | vblank->inmodeset = 1; |
| 1302 | } |
| 1303 | spin_unlock(&dev->vbl_lock); |
| 1304 | |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1305 | /* Send any queued vblank events, lest the natives grow disquiet */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1306 | seq = drm_vblank_count_and_time(dev, pipe, &now); |
Imre Deak | e7783ba | 2012-11-02 13:30:50 +0200 | [diff] [blame] | 1307 | |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1308 | list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1309 | if (e->pipe != pipe) |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1310 | continue; |
Ville Syrjälä | 4484489 | 2015-10-09 22:57:36 +0300 | [diff] [blame] | 1311 | DRM_DEBUG("Sending premature vblank event on disable: " |
Rodrigo Vivi | 1d77685 | 2016-08-03 09:53:46 -0700 | [diff] [blame] | 1312 | "wanted %u, current %u\n", |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1313 | e->event.sequence, seq); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1314 | list_del(&e->base.link); |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1315 | drm_vblank_put(dev, pipe); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1316 | send_vblank_event(dev, e, seq, &now); |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1317 | } |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1318 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1319 | } |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1320 | EXPORT_SYMBOL(drm_crtc_vblank_off); |
| 1321 | |
| 1322 | /** |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1323 | * drm_crtc_vblank_reset - reset vblank state to off on a CRTC |
Thierry Reding | 2b193f0 | 2015-09-24 18:35:30 +0200 | [diff] [blame] | 1324 | * @crtc: CRTC in question |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1325 | * |
| 1326 | * Drivers can use this function to reset the vblank state to off at load time. |
| 1327 | * Drivers should use this together with the drm_crtc_vblank_off() and |
| 1328 | * drm_crtc_vblank_on() functions. The difference compared to |
| 1329 | * drm_crtc_vblank_off() is that this function doesn't save the vblank counter |
| 1330 | * and hence doesn't need to call any driver hooks. |
| 1331 | */ |
Thierry Reding | 2b193f0 | 2015-09-24 18:35:30 +0200 | [diff] [blame] | 1332 | void drm_crtc_vblank_reset(struct drm_crtc *crtc) |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1333 | { |
Thierry Reding | 2b193f0 | 2015-09-24 18:35:30 +0200 | [diff] [blame] | 1334 | struct drm_device *dev = crtc->dev; |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1335 | unsigned long irqflags; |
Thierry Reding | 2b193f0 | 2015-09-24 18:35:30 +0200 | [diff] [blame] | 1336 | unsigned int pipe = drm_crtc_index(crtc); |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 1337 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1338 | |
| 1339 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
| 1340 | /* |
| 1341 | * Prevent subsequent drm_vblank_get() from enabling the vblank |
| 1342 | * interrupt by bumping the refcount. |
| 1343 | */ |
| 1344 | if (!vblank->inmodeset) { |
| 1345 | atomic_inc(&vblank->refcount); |
| 1346 | vblank->inmodeset = 1; |
| 1347 | } |
| 1348 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
| 1349 | |
| 1350 | WARN_ON(!list_empty(&dev->vblank_event_list)); |
| 1351 | } |
| 1352 | EXPORT_SYMBOL(drm_crtc_vblank_reset); |
| 1353 | |
| 1354 | /** |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1355 | * drm_crtc_vblank_on - enable vblank events on a CRTC |
| 1356 | * @crtc: CRTC in question |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1357 | * |
| 1358 | * This functions restores the vblank interrupt state captured with |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1359 | * drm_crtc_vblank_off() again. Note that calls to drm_crtc_vblank_on() and |
| 1360 | * drm_crtc_vblank_off() can be unbalanced and so can also be unconditionally called |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1361 | * in driver load code to reflect the current hardware state of the crtc. |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1362 | */ |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1363 | void drm_crtc_vblank_on(struct drm_crtc *crtc) |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1364 | { |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1365 | struct drm_device *dev = crtc->dev; |
| 1366 | unsigned int pipe = drm_crtc_index(crtc); |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1367 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1368 | unsigned long irqflags; |
| 1369 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1370 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1371 | return; |
| 1372 | |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1373 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
Mario Kleiner | e823589 | 2016-02-12 20:30:27 +0100 | [diff] [blame] | 1374 | DRM_DEBUG_VBL("crtc %d, vblank enabled %d, inmodeset %d\n", |
| 1375 | pipe, vblank->enabled, vblank->inmodeset); |
| 1376 | |
Ville Syrjälä | 7ffd7a6 | 2014-08-06 14:49:44 +0300 | [diff] [blame] | 1377 | /* Drop our private "prevent drm_vblank_get" refcount */ |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1378 | if (vblank->inmodeset) { |
| 1379 | atomic_dec(&vblank->refcount); |
| 1380 | vblank->inmodeset = 0; |
Ville Syrjälä | 7ffd7a6 | 2014-08-06 14:49:44 +0300 | [diff] [blame] | 1381 | } |
Ville Syrjälä | f8ad028 | 2014-08-06 14:49:49 +0300 | [diff] [blame] | 1382 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 1383 | drm_reset_vblank_timestamp(dev, pipe); |
| 1384 | |
Ville Syrjälä | cd19e52 | 2014-08-06 14:49:56 +0300 | [diff] [blame] | 1385 | /* |
| 1386 | * re-enable interrupts if there are users left, or the |
| 1387 | * user wishes vblank interrupts to be enabled all the time. |
| 1388 | */ |
Mario Kleiner | bb74fc1 | 2016-02-12 20:30:30 +0100 | [diff] [blame] | 1389 | if (atomic_read(&vblank->refcount) != 0 || drm_vblank_offdelay == 0) |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1390 | WARN_ON(drm_vblank_enable(dev, pipe)); |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1391 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
| 1392 | } |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1393 | EXPORT_SYMBOL(drm_crtc_vblank_on); |
| 1394 | |
Daniel Vetter | 07600c5 | 2016-11-14 10:02:52 +0100 | [diff] [blame] | 1395 | static void drm_legacy_vblank_pre_modeset(struct drm_device *dev, |
| 1396 | unsigned int pipe) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1397 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1398 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1399 | |
Huacai Chen | b7ea85a | 2013-05-21 06:23:43 +0000 | [diff] [blame] | 1400 | /* vblank is not initialized (IRQ not installed ?), or has been freed */ |
Jerome Glisse | e77cef9 | 2010-01-07 15:39:13 +0100 | [diff] [blame] | 1401 | if (!dev->num_crtcs) |
| 1402 | return; |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1403 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1404 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1405 | return; |
| 1406 | |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1407 | /* |
| 1408 | * To avoid all the problems that might happen if interrupts |
| 1409 | * were enabled/disabled around or between these calls, we just |
| 1410 | * have the kernel take a reference on the CRTC (just once though |
| 1411 | * to avoid corrupting the count if multiple, mismatch calls occur), |
| 1412 | * so that interrupts remain enabled in the interim. |
| 1413 | */ |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1414 | if (!vblank->inmodeset) { |
| 1415 | vblank->inmodeset = 0x1; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1416 | if (drm_vblank_get(dev, pipe) == 0) |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1417 | vblank->inmodeset |= 0x2; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1418 | } |
| 1419 | } |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1420 | |
Daniel Vetter | 07600c5 | 2016-11-14 10:02:52 +0100 | [diff] [blame] | 1421 | static void drm_legacy_vblank_post_modeset(struct drm_device *dev, |
| 1422 | unsigned int pipe) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1423 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1424 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1425 | unsigned long irqflags; |
| 1426 | |
Huacai Chen | b7ea85a | 2013-05-21 06:23:43 +0000 | [diff] [blame] | 1427 | /* vblank is not initialized (IRQ not installed ?), or has been freed */ |
| 1428 | if (!dev->num_crtcs) |
| 1429 | return; |
| 1430 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1431 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Thierry Reding | 7d1de85 | 2015-08-12 17:00:30 +0200 | [diff] [blame] | 1432 | return; |
| 1433 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1434 | if (vblank->inmodeset) { |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1435 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
Mario Kleiner | c61934e | 2016-02-12 20:30:29 +0100 | [diff] [blame] | 1436 | drm_reset_vblank_timestamp(dev, pipe); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1437 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
Chris Wilson | b3f5e73 | 2009-02-19 14:48:22 +0000 | [diff] [blame] | 1438 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1439 | if (vblank->inmodeset & 0x2) |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1440 | drm_vblank_put(dev, pipe); |
Chris Wilson | b3f5e73 | 2009-02-19 14:48:22 +0000 | [diff] [blame] | 1441 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1442 | vblank->inmodeset = 0; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1443 | } |
| 1444 | } |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1445 | |
Daniel Vetter | 25a9939 | 2016-12-14 00:08:02 +0100 | [diff] [blame] | 1446 | int drm_legacy_modeset_ctl(struct drm_device *dev, void *data, |
| 1447 | struct drm_file *file_priv) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1448 | { |
| 1449 | struct drm_modeset_ctl *modeset = data; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1450 | unsigned int pipe; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1451 | |
| 1452 | /* If drm_vblank_init() hasn't been called yet, just no-op */ |
| 1453 | if (!dev->num_crtcs) |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1454 | return 0; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1455 | |
Laurent Pinchart | 2993555 | 2012-05-30 00:58:09 +0200 | [diff] [blame] | 1456 | /* KMS drivers handle this internally */ |
Daniel Vetter | fa53864 | 2016-08-03 21:11:10 +0200 | [diff] [blame] | 1457 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
Laurent Pinchart | 2993555 | 2012-05-30 00:58:09 +0200 | [diff] [blame] | 1458 | return 0; |
| 1459 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1460 | pipe = modeset->crtc; |
| 1461 | if (pipe >= dev->num_crtcs) |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1462 | return -EINVAL; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1463 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1464 | switch (modeset->cmd) { |
| 1465 | case _DRM_PRE_MODESET: |
Daniel Vetter | 07600c5 | 2016-11-14 10:02:52 +0100 | [diff] [blame] | 1466 | drm_legacy_vblank_pre_modeset(dev, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1467 | break; |
| 1468 | case _DRM_POST_MODESET: |
Daniel Vetter | 07600c5 | 2016-11-14 10:02:52 +0100 | [diff] [blame] | 1469 | drm_legacy_vblank_post_modeset(dev, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1470 | break; |
| 1471 | default: |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1472 | return -EINVAL; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1473 | } |
| 1474 | |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1475 | return 0; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1476 | } |
| 1477 | |
Chris Wilson | 9a4d9ba | 2017-03-22 10:06:50 +0000 | [diff] [blame] | 1478 | static inline bool vblank_passed(u32 seq, u32 ref) |
| 1479 | { |
| 1480 | return (seq - ref) <= (1 << 23); |
| 1481 | } |
| 1482 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1483 | static int drm_queue_vblank_event(struct drm_device *dev, unsigned int pipe, |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1484 | union drm_wait_vblank *vblwait, |
| 1485 | struct drm_file *file_priv) |
| 1486 | { |
Ville Syrjälä | ffe7c73 | 2014-08-06 14:49:52 +0300 | [diff] [blame] | 1487 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1488 | struct drm_pending_vblank_event *e; |
| 1489 | struct timeval now; |
| 1490 | unsigned long flags; |
| 1491 | unsigned int seq; |
Chris Wilson | ea5d552 | 2010-12-01 19:41:31 +0000 | [diff] [blame] | 1492 | int ret; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1493 | |
Thierry Reding | f76511b | 2014-12-10 13:03:40 +0100 | [diff] [blame] | 1494 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
Chris Wilson | ea5d552 | 2010-12-01 19:41:31 +0000 | [diff] [blame] | 1495 | if (e == NULL) { |
| 1496 | ret = -ENOMEM; |
| 1497 | goto err_put; |
| 1498 | } |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1499 | |
| 1500 | e->pipe = pipe; |
| 1501 | e->event.base.type = DRM_EVENT_VBLANK; |
Thierry Reding | f76511b | 2014-12-10 13:03:40 +0100 | [diff] [blame] | 1502 | e->event.base.length = sizeof(e->event); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1503 | e->event.user_data = vblwait->request.signal; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1504 | |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1505 | spin_lock_irqsave(&dev->event_lock, flags); |
| 1506 | |
Ville Syrjälä | ffe7c73 | 2014-08-06 14:49:52 +0300 | [diff] [blame] | 1507 | /* |
Daniel Vetter | 2d1e331 | 2016-11-14 10:02:54 +0100 | [diff] [blame] | 1508 | * drm_crtc_vblank_off() might have been called after we called |
| 1509 | * drm_vblank_get(). drm_crtc_vblank_off() holds event_lock around the |
| 1510 | * vblank disable, so no need for further locking. The reference from |
| 1511 | * drm_vblank_get() protects against vblank disable from another source. |
Ville Syrjälä | ffe7c73 | 2014-08-06 14:49:52 +0300 | [diff] [blame] | 1512 | */ |
Chris Wilson | 43dc7fe | 2017-03-17 20:20:27 +0000 | [diff] [blame] | 1513 | if (!READ_ONCE(vblank->enabled)) { |
Ville Syrjälä | ffe7c73 | 2014-08-06 14:49:52 +0300 | [diff] [blame] | 1514 | ret = -EINVAL; |
| 1515 | goto err_unlock; |
| 1516 | } |
| 1517 | |
Daniel Vetter | 4020b22 | 2016-01-28 12:01:04 +0100 | [diff] [blame] | 1518 | ret = drm_event_reserve_init_locked(dev, file_priv, &e->base, |
| 1519 | &e->event.base); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1520 | |
Daniel Vetter | 4020b22 | 2016-01-28 12:01:04 +0100 | [diff] [blame] | 1521 | if (ret) |
| 1522 | goto err_unlock; |
| 1523 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1524 | seq = drm_vblank_count_and_time(dev, pipe, &now); |
| 1525 | |
Rodrigo Vivi | 1d77685 | 2016-08-03 09:53:46 -0700 | [diff] [blame] | 1526 | DRM_DEBUG("event on vblank count %u, current %u, crtc %u\n", |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1527 | vblwait->request.sequence, seq, pipe); |
| 1528 | |
Daniel Vetter | 7d52cb88 | 2017-03-08 15:12:43 +0100 | [diff] [blame] | 1529 | trace_drm_vblank_event_queued(file_priv, pipe, |
Jesse Barnes | b9c2c9a | 2010-07-01 16:48:09 -0700 | [diff] [blame] | 1530 | vblwait->request.sequence); |
| 1531 | |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1532 | e->event.sequence = vblwait->request.sequence; |
Chris Wilson | 9a4d9ba | 2017-03-22 10:06:50 +0000 | [diff] [blame] | 1533 | if (vblank_passed(seq, vblwait->request.sequence)) { |
Dan Carpenter | 6f33162 | 2010-12-09 08:35:40 +0300 | [diff] [blame] | 1534 | drm_vblank_put(dev, pipe); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1535 | send_vblank_event(dev, e, seq, &now); |
Mario Kleiner | 000fa7c | 2010-12-10 16:00:19 +0100 | [diff] [blame] | 1536 | vblwait->reply.sequence = seq; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1537 | } else { |
Ilija Hadzic | a6778e9 | 2011-10-31 13:11:57 -0400 | [diff] [blame] | 1538 | /* drm_handle_vblank_events will call drm_vblank_put */ |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1539 | list_add_tail(&e->base.link, &dev->vblank_event_list); |
Mario Kleiner | 000fa7c | 2010-12-10 16:00:19 +0100 | [diff] [blame] | 1540 | vblwait->reply.sequence = vblwait->request.sequence; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1541 | } |
| 1542 | |
| 1543 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 1544 | |
| 1545 | return 0; |
Chris Wilson | ea5d552 | 2010-12-01 19:41:31 +0000 | [diff] [blame] | 1546 | |
| 1547 | err_unlock: |
| 1548 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 1549 | kfree(e); |
| 1550 | err_put: |
Dan Carpenter | 6f33162 | 2010-12-09 08:35:40 +0300 | [diff] [blame] | 1551 | drm_vblank_put(dev, pipe); |
Chris Wilson | ea5d552 | 2010-12-01 19:41:31 +0000 | [diff] [blame] | 1552 | return ret; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1553 | } |
| 1554 | |
Chris Wilson | b33b027 | 2017-03-17 20:20:30 +0000 | [diff] [blame] | 1555 | static bool drm_wait_vblank_is_query(union drm_wait_vblank *vblwait) |
| 1556 | { |
| 1557 | if (vblwait->request.sequence) |
| 1558 | return false; |
| 1559 | |
| 1560 | return _DRM_VBLANK_RELATIVE == |
| 1561 | (vblwait->request.type & (_DRM_VBLANK_TYPES_MASK | |
| 1562 | _DRM_VBLANK_EVENT | |
| 1563 | _DRM_VBLANK_NEXTONMISS)); |
| 1564 | } |
| 1565 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1566 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | * Wait for VBLANK. |
| 1568 | * |
| 1569 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1570 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | * \param cmd command. |
| 1572 | * \param data user argument, pointing to a drm_wait_vblank structure. |
| 1573 | * \return zero on success or a negative number on failure. |
| 1574 | * |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1575 | * This function enables the vblank interrupt on the pipe requested, then |
| 1576 | * sleeps waiting for the requested sequence number to occur, and drops |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1577 | * the vblank interrupt refcount afterwards. (vblank IRQ disable follows that |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1578 | * after a timeout with no further vblank waits scheduled). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | */ |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1580 | int drm_wait_vblank(struct drm_device *dev, void *data, |
| 1581 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1583 | struct drm_vblank_crtc *vblank; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1584 | union drm_wait_vblank *vblwait = data; |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1585 | int ret; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1586 | unsigned int flags, seq, pipe, high_pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | |
Daniel Vetter | 4984979b | 2013-08-28 15:02:37 +0200 | [diff] [blame] | 1588 | if (!dev->irq_enabled) |
| 1589 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1591 | if (vblwait->request.type & _DRM_VBLANK_SIGNAL) |
| 1592 | return -EINVAL; |
| 1593 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1594 | if (vblwait->request.type & |
Ilija Hadzic | 19b01b5 | 2011-03-18 16:58:04 -0500 | [diff] [blame] | 1595 | ~(_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK | |
| 1596 | _DRM_VBLANK_HIGH_CRTC_MASK)) { |
=?utf-8?q?Michel_D=C3=A4nzer?= | 776c944 | 2006-10-24 22:24:38 +1000 | [diff] [blame] | 1597 | DRM_ERROR("Unsupported type value 0x%x, supported mask 0x%x\n", |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1598 | vblwait->request.type, |
Ilija Hadzic | 19b01b5 | 2011-03-18 16:58:04 -0500 | [diff] [blame] | 1599 | (_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK | |
| 1600 | _DRM_VBLANK_HIGH_CRTC_MASK)); |
=?utf-8?q?Michel_D=C3=A4nzer?= | 776c944 | 2006-10-24 22:24:38 +1000 | [diff] [blame] | 1601 | return -EINVAL; |
| 1602 | } |
| 1603 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1604 | flags = vblwait->request.type & _DRM_VBLANK_FLAGS_MASK; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1605 | high_pipe = (vblwait->request.type & _DRM_VBLANK_HIGH_CRTC_MASK); |
| 1606 | if (high_pipe) |
| 1607 | pipe = high_pipe >> _DRM_VBLANK_HIGH_CRTC_SHIFT; |
Ilija Hadzic | 19b01b5 | 2011-03-18 16:58:04 -0500 | [diff] [blame] | 1608 | else |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1609 | pipe = flags & _DRM_VBLANK_SECONDARY ? 1 : 0; |
| 1610 | if (pipe >= dev->num_crtcs) |
=?utf-8?q?Michel_D=C3=A4nzer?= | 776c944 | 2006-10-24 22:24:38 +1000 | [diff] [blame] | 1611 | return -EINVAL; |
| 1612 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1613 | vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1614 | |
Chris Wilson | b33b027 | 2017-03-17 20:20:30 +0000 | [diff] [blame] | 1615 | /* If the counter is currently enabled and accurate, short-circuit |
| 1616 | * queries to return the cached timestamp of the last vblank. |
| 1617 | */ |
| 1618 | if (dev->vblank_disable_immediate && |
| 1619 | drm_wait_vblank_is_query(vblwait) && |
| 1620 | READ_ONCE(vblank->enabled)) { |
| 1621 | struct timeval now; |
| 1622 | |
| 1623 | vblwait->reply.sequence = |
| 1624 | drm_vblank_count_and_time(dev, pipe, &now); |
| 1625 | vblwait->reply.tval_sec = now.tv_sec; |
| 1626 | vblwait->reply.tval_usec = now.tv_usec; |
| 1627 | return 0; |
| 1628 | } |
| 1629 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1630 | ret = drm_vblank_get(dev, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1631 | if (ret) { |
Chris Wilson | 82c8e02 | 2017-03-15 20:40:26 +0000 | [diff] [blame] | 1632 | DRM_DEBUG("crtc %d failed to acquire vblank counter, %d\n", pipe, ret); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1633 | return ret; |
| 1634 | } |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1635 | seq = drm_vblank_count(dev, pipe); |
=?utf-8?q?Michel_D=C3=A4nzer?= | 776c944 | 2006-10-24 22:24:38 +1000 | [diff] [blame] | 1636 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1637 | switch (vblwait->request.type & _DRM_VBLANK_TYPES_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | case _DRM_VBLANK_RELATIVE: |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1639 | vblwait->request.sequence += seq; |
| 1640 | vblwait->request.type &= ~_DRM_VBLANK_RELATIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | case _DRM_VBLANK_ABSOLUTE: |
| 1642 | break; |
| 1643 | default: |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1644 | ret = -EINVAL; |
| 1645 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | } |
| 1647 | |
Michel Dänzer | 97ef1ae | 2016-06-24 16:59:47 +0900 | [diff] [blame] | 1648 | if ((flags & _DRM_VBLANK_NEXTONMISS) && |
Chris Wilson | 9a4d9ba | 2017-03-22 10:06:50 +0000 | [diff] [blame] | 1649 | vblank_passed(seq, vblwait->request.sequence)) |
Michel Dänzer | 97ef1ae | 2016-06-24 16:59:47 +0900 | [diff] [blame] | 1650 | vblwait->request.sequence = seq + 1; |
Michel Dänzer | 97ef1ae | 2016-06-24 16:59:47 +0900 | [diff] [blame] | 1651 | |
Ilija Hadzic | a6778e9 | 2011-10-31 13:11:57 -0400 | [diff] [blame] | 1652 | if (flags & _DRM_VBLANK_EVENT) { |
| 1653 | /* must hold on to the vblank ref until the event fires |
| 1654 | * drm_vblank_put will be called asynchronously |
| 1655 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1656 | return drm_queue_vblank_event(dev, pipe, vblwait, file_priv); |
Ilija Hadzic | a6778e9 | 2011-10-31 13:11:57 -0400 | [diff] [blame] | 1657 | } |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1658 | |
Chris Wilson | 82c8e02 | 2017-03-15 20:40:26 +0000 | [diff] [blame] | 1659 | if (vblwait->request.sequence != seq) { |
| 1660 | DRM_DEBUG("waiting on vblank count %u, crtc %u\n", |
| 1661 | vblwait->request.sequence, pipe); |
| 1662 | DRM_WAIT_ON(ret, vblank->queue, 3 * HZ, |
Chris Wilson | 9a4d9ba | 2017-03-22 10:06:50 +0000 | [diff] [blame] | 1663 | vblank_passed(drm_vblank_count(dev, pipe), |
| 1664 | vblwait->request.sequence) || |
Chris Wilson | 6c06a59 | 2017-03-17 20:20:28 +0000 | [diff] [blame] | 1665 | !READ_ONCE(vblank->enabled)); |
Chris Wilson | 82c8e02 | 2017-03-15 20:40:26 +0000 | [diff] [blame] | 1666 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1668 | if (ret != -EINTR) { |
| 1669 | struct timeval now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1671 | vblwait->reply.sequence = drm_vblank_count_and_time(dev, pipe, &now); |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1672 | vblwait->reply.tval_sec = now.tv_sec; |
| 1673 | vblwait->reply.tval_usec = now.tv_usec; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1674 | |
Chris Wilson | 82c8e02 | 2017-03-15 20:40:26 +0000 | [diff] [blame] | 1675 | DRM_DEBUG("crtc %d returning %u to client\n", |
| 1676 | pipe, vblwait->reply.sequence); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | } else { |
Chris Wilson | 82c8e02 | 2017-03-15 20:40:26 +0000 | [diff] [blame] | 1678 | DRM_DEBUG("crtc %d vblank wait interrupted by signal\n", pipe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | } |
| 1680 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1681 | done: |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1682 | drm_vblank_put(dev, pipe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | return ret; |
| 1684 | } |
| 1685 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1686 | static void drm_handle_vblank_events(struct drm_device *dev, unsigned int pipe) |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1687 | { |
| 1688 | struct drm_pending_vblank_event *e, *t; |
| 1689 | struct timeval now; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1690 | unsigned int seq; |
| 1691 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1692 | assert_spin_locked(&dev->event_lock); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1693 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1694 | seq = drm_vblank_count_and_time(dev, pipe, &now); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1695 | |
| 1696 | list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1697 | if (e->pipe != pipe) |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1698 | continue; |
Chris Wilson | 9a4d9ba | 2017-03-22 10:06:50 +0000 | [diff] [blame] | 1699 | if (!vblank_passed(seq, e->event.sequence)) |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1700 | continue; |
| 1701 | |
Rodrigo Vivi | 1d77685 | 2016-08-03 09:53:46 -0700 | [diff] [blame] | 1702 | DRM_DEBUG("vblank event on %u, current %u\n", |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1703 | e->event.sequence, seq); |
| 1704 | |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1705 | list_del(&e->base.link); |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1706 | drm_vblank_put(dev, pipe); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1707 | send_vblank_event(dev, e, seq, &now); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1708 | } |
| 1709 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1710 | trace_drm_vblank_event(pipe, seq); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1711 | } |
| 1712 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | /** |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1714 | * drm_handle_vblank - handle a vblank event |
| 1715 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1716 | * @pipe: index of CRTC where this event occurred |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1717 | * |
| 1718 | * Drivers should call this routine in their vblank interrupt handlers to |
| 1719 | * update the vblank counter and send any signals that may be pending. |
Thierry Reding | 115ebcd | 2014-12-15 14:47:18 +0100 | [diff] [blame] | 1720 | * |
| 1721 | * This is the legacy version of drm_crtc_handle_vblank(). |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1722 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1723 | bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1724 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1725 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1726 | unsigned long irqflags; |
Chris Wilson | 75cff08 | 2017-03-24 17:30:58 +0000 | [diff] [blame] | 1727 | bool disable_irq; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1728 | |
Daniel Vetter | ee3c779 | 2015-02-22 15:11:20 +0100 | [diff] [blame] | 1729 | if (WARN_ON_ONCE(!dev->num_crtcs)) |
Chris Wilson | 78c6e17 | 2011-01-31 10:48:04 +0000 | [diff] [blame] | 1730 | return false; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1731 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1732 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1733 | return false; |
| 1734 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1735 | spin_lock_irqsave(&dev->event_lock, irqflags); |
| 1736 | |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1737 | /* Need timestamp lock to prevent concurrent execution with |
| 1738 | * vblank enable/disable, as this would cause inconsistent |
| 1739 | * or corrupted timestamps and vblank counts. |
| 1740 | */ |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1741 | spin_lock(&dev->vblank_time_lock); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1742 | |
| 1743 | /* Vblank irq handling disabled. Nothing to do. */ |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1744 | if (!vblank->enabled) { |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1745 | spin_unlock(&dev->vblank_time_lock); |
| 1746 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
Chris Wilson | 78c6e17 | 2011-01-31 10:48:04 +0000 | [diff] [blame] | 1747 | return false; |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1748 | } |
| 1749 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 1750 | drm_update_vblank_count(dev, pipe, DRM_CALLED_FROM_VBLIRQ); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1751 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1752 | spin_unlock(&dev->vblank_time_lock); |
| 1753 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1754 | wake_up(&vblank->queue); |
Mario Kleiner | 27641c3f | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1755 | |
Chris Wilson | 608b205 | 2017-03-15 20:40:25 +0000 | [diff] [blame] | 1756 | /* With instant-off, we defer disabling the interrupt until after |
Chris Wilson | 75cff08 | 2017-03-24 17:30:58 +0000 | [diff] [blame] | 1757 | * we finish processing the following vblank after all events have |
| 1758 | * been signaled. The disable has to be last (after |
| 1759 | * drm_handle_vblank_events) so that the timestamp is always accurate. |
Chris Wilson | 608b205 | 2017-03-15 20:40:25 +0000 | [diff] [blame] | 1760 | */ |
Chris Wilson | 75cff08 | 2017-03-24 17:30:58 +0000 | [diff] [blame] | 1761 | disable_irq = (dev->vblank_disable_immediate && |
| 1762 | drm_vblank_offdelay > 0 && |
| 1763 | !atomic_read(&vblank->refcount)); |
| 1764 | |
| 1765 | drm_handle_vblank_events(dev, pipe); |
Chris Wilson | 608b205 | 2017-03-15 20:40:25 +0000 | [diff] [blame] | 1766 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1767 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
| 1768 | |
Chris Wilson | 75cff08 | 2017-03-24 17:30:58 +0000 | [diff] [blame] | 1769 | if (disable_irq) |
| 1770 | vblank_disable_fn((unsigned long)vblank); |
| 1771 | |
Chris Wilson | 78c6e17 | 2011-01-31 10:48:04 +0000 | [diff] [blame] | 1772 | return true; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1773 | } |
| 1774 | EXPORT_SYMBOL(drm_handle_vblank); |
Thierry Reding | 115ebcd | 2014-12-15 14:47:18 +0100 | [diff] [blame] | 1775 | |
| 1776 | /** |
| 1777 | * drm_crtc_handle_vblank - handle a vblank event |
| 1778 | * @crtc: where this event occurred |
| 1779 | * |
| 1780 | * Drivers should call this routine in their vblank interrupt handlers to |
| 1781 | * update the vblank counter and send any signals that may be pending. |
| 1782 | * |
| 1783 | * This is the native KMS version of drm_handle_vblank(). |
| 1784 | * |
| 1785 | * Returns: |
| 1786 | * True if the event was successfully handled, false on failure. |
| 1787 | */ |
| 1788 | bool drm_crtc_handle_vblank(struct drm_crtc *crtc) |
| 1789 | { |
| 1790 | return drm_handle_vblank(crtc->dev, drm_crtc_index(crtc)); |
| 1791 | } |
| 1792 | EXPORT_SYMBOL(drm_crtc_handle_vblank); |