Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2006-2010 Intel Corporation |
| 3 | * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 6 | * copy of this software and associated documentation files (the "Software"), |
| 7 | * to deal in the Software without restriction, including without limitation |
| 8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 9 | * and/or sell copies of the Software, and to permit persons to whom the |
| 10 | * Software is furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice (including the next |
| 13 | * paragraph) shall be included in all copies or substantial portions of the |
| 14 | * Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 22 | * DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: |
| 25 | * Eric Anholt <eric@anholt.net> |
| 26 | * Dave Airlie <airlied@linux.ie> |
| 27 | * Jesse Barnes <jesse.barnes@intel.com> |
| 28 | * Chris Wilson <chris@chris-wilson.co.uk> |
| 29 | */ |
| 30 | |
Joe Perches | a70491c | 2012-03-18 13:00:11 -0700 | [diff] [blame] | 31 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 32 | |
Javi Merino | f766093 | 2015-04-16 12:43:45 -0700 | [diff] [blame] | 33 | #include <linux/kernel.h> |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 34 | #include <linux/moduleparam.h> |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 35 | #include <linux/pwm.h> |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 36 | #include "intel_drv.h" |
| 37 | |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 38 | #define CRC_PMIC_PWM_PERIOD_NS 21333 |
| 39 | |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 40 | void |
Ville Syrjälä | 4c6df4b | 2013-09-02 21:13:39 +0300 | [diff] [blame] | 41 | intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 42 | struct drm_display_mode *adjusted_mode) |
| 43 | { |
Ville Syrjälä | 4c6df4b | 2013-09-02 21:13:39 +0300 | [diff] [blame] | 44 | drm_mode_copy(adjusted_mode, fixed_mode); |
Imre Deak | a52690e | 2013-08-27 12:24:09 +0300 | [diff] [blame] | 45 | |
| 46 | drm_mode_set_crtcinfo(adjusted_mode, 0); |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 47 | } |
| 48 | |
Jani Nikula | 525997e | 2014-04-29 23:30:48 +0300 | [diff] [blame] | 49 | /** |
| 50 | * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID |
| 51 | * @dev: drm device |
| 52 | * @fixed_mode : panel native mode |
| 53 | * @connector: LVDS/eDP connector |
| 54 | * |
| 55 | * Return downclock_avail |
| 56 | * Find the reduced downclock for LVDS/eDP in EDID. |
| 57 | */ |
| 58 | struct drm_display_mode * |
| 59 | intel_find_panel_downclock(struct drm_device *dev, |
| 60 | struct drm_display_mode *fixed_mode, |
| 61 | struct drm_connector *connector) |
| 62 | { |
| 63 | struct drm_display_mode *scan, *tmp_mode; |
| 64 | int temp_downclock; |
| 65 | |
| 66 | temp_downclock = fixed_mode->clock; |
| 67 | tmp_mode = NULL; |
| 68 | |
| 69 | list_for_each_entry(scan, &connector->probed_modes, head) { |
| 70 | /* |
| 71 | * If one mode has the same resolution with the fixed_panel |
| 72 | * mode while they have the different refresh rate, it means |
| 73 | * that the reduced downclock is found. In such |
| 74 | * case we can set the different FPx0/1 to dynamically select |
| 75 | * between low and high frequency. |
| 76 | */ |
| 77 | if (scan->hdisplay == fixed_mode->hdisplay && |
| 78 | scan->hsync_start == fixed_mode->hsync_start && |
| 79 | scan->hsync_end == fixed_mode->hsync_end && |
| 80 | scan->htotal == fixed_mode->htotal && |
| 81 | scan->vdisplay == fixed_mode->vdisplay && |
| 82 | scan->vsync_start == fixed_mode->vsync_start && |
| 83 | scan->vsync_end == fixed_mode->vsync_end && |
| 84 | scan->vtotal == fixed_mode->vtotal) { |
| 85 | if (scan->clock < temp_downclock) { |
| 86 | /* |
| 87 | * The downclock is already found. But we |
| 88 | * expect to find the lower downclock. |
| 89 | */ |
| 90 | temp_downclock = scan->clock; |
| 91 | tmp_mode = scan; |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | if (temp_downclock < fixed_mode->clock) |
| 97 | return drm_mode_duplicate(dev, tmp_mode); |
| 98 | else |
| 99 | return NULL; |
| 100 | } |
| 101 | |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 102 | /* adjusted_mode has been preset to be the panel's fixed mode */ |
| 103 | void |
Jesse Barnes | b074cec | 2013-04-25 12:55:02 -0700 | [diff] [blame] | 104 | intel_pch_panel_fitting(struct intel_crtc *intel_crtc, |
Ander Conselvan de Oliveira | 5cec258 | 2015-01-15 14:55:21 +0200 | [diff] [blame] | 105 | struct intel_crtc_state *pipe_config, |
Jesse Barnes | b074cec | 2013-04-25 12:55:02 -0700 | [diff] [blame] | 106 | int fitting_mode) |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 107 | { |
Ville Syrjälä | 7c5f93b | 2015-09-08 13:40:49 +0300 | [diff] [blame] | 108 | const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; |
| 109 | int x = 0, y = 0, width = 0, height = 0; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 110 | |
| 111 | /* Native modes don't need fitting */ |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 112 | if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w && |
| 113 | adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h) |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 114 | goto done; |
| 115 | |
| 116 | switch (fitting_mode) { |
| 117 | case DRM_MODE_SCALE_CENTER: |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame] | 118 | width = pipe_config->pipe_src_w; |
| 119 | height = pipe_config->pipe_src_h; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 120 | x = (adjusted_mode->crtc_hdisplay - width + 1)/2; |
| 121 | y = (adjusted_mode->crtc_vdisplay - height + 1)/2; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 122 | break; |
| 123 | |
| 124 | case DRM_MODE_SCALE_ASPECT: |
| 125 | /* Scale but preserve the aspect ratio */ |
| 126 | { |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 127 | u32 scaled_width = adjusted_mode->crtc_hdisplay |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 128 | * pipe_config->pipe_src_h; |
| 129 | u32 scaled_height = pipe_config->pipe_src_w |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 130 | * adjusted_mode->crtc_vdisplay; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 131 | if (scaled_width > scaled_height) { /* pillar */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame] | 132 | width = scaled_height / pipe_config->pipe_src_h; |
Adam Jackson | 302983e | 2011-07-13 16:32:32 -0400 | [diff] [blame] | 133 | if (width & 1) |
Akshay Joshi | 0206e35 | 2011-08-16 15:34:10 -0400 | [diff] [blame] | 134 | width++; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 135 | x = (adjusted_mode->crtc_hdisplay - width + 1) / 2; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 136 | y = 0; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 137 | height = adjusted_mode->crtc_vdisplay; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 138 | } else if (scaled_width < scaled_height) { /* letter */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame] | 139 | height = scaled_width / pipe_config->pipe_src_w; |
Adam Jackson | 302983e | 2011-07-13 16:32:32 -0400 | [diff] [blame] | 140 | if (height & 1) |
| 141 | height++; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 142 | y = (adjusted_mode->crtc_vdisplay - height + 1) / 2; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 143 | x = 0; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 144 | width = adjusted_mode->crtc_hdisplay; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 145 | } else { |
| 146 | x = y = 0; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 147 | width = adjusted_mode->crtc_hdisplay; |
| 148 | height = adjusted_mode->crtc_vdisplay; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 149 | } |
| 150 | } |
| 151 | break; |
| 152 | |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 153 | case DRM_MODE_SCALE_FULLSCREEN: |
| 154 | x = y = 0; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 155 | width = adjusted_mode->crtc_hdisplay; |
| 156 | height = adjusted_mode->crtc_vdisplay; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 157 | break; |
Jesse Barnes | ab3e67f | 2013-04-25 12:55:03 -0700 | [diff] [blame] | 158 | |
| 159 | default: |
| 160 | WARN(1, "bad panel fit mode: %d\n", fitting_mode); |
| 161 | return; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | done: |
Jesse Barnes | b074cec | 2013-04-25 12:55:02 -0700 | [diff] [blame] | 165 | pipe_config->pch_pfit.pos = (x << 16) | y; |
| 166 | pipe_config->pch_pfit.size = (width << 16) | height; |
Chris Wilson | fd4daa9 | 2013-08-27 17:04:17 +0100 | [diff] [blame] | 167 | pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 168 | } |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 169 | |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 170 | static void |
Ville Syrjälä | 5e7234c | 2015-09-25 16:37:43 +0300 | [diff] [blame] | 171 | centre_horizontally(struct drm_display_mode *adjusted_mode, |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 172 | int width) |
| 173 | { |
| 174 | u32 border, sync_pos, blank_width, sync_width; |
| 175 | |
| 176 | /* keep the hsync and hblank widths constant */ |
Ville Syrjälä | 5e7234c | 2015-09-25 16:37:43 +0300 | [diff] [blame] | 177 | sync_width = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start; |
| 178 | blank_width = adjusted_mode->crtc_hblank_end - adjusted_mode->crtc_hblank_start; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 179 | sync_pos = (blank_width - sync_width + 1) / 2; |
| 180 | |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 181 | border = (adjusted_mode->crtc_hdisplay - width + 1) / 2; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 182 | border += border & 1; /* make the border even */ |
| 183 | |
Ville Syrjälä | 5e7234c | 2015-09-25 16:37:43 +0300 | [diff] [blame] | 184 | adjusted_mode->crtc_hdisplay = width; |
| 185 | adjusted_mode->crtc_hblank_start = width + border; |
| 186 | adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_hblank_start + blank_width; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 187 | |
Ville Syrjälä | 5e7234c | 2015-09-25 16:37:43 +0300 | [diff] [blame] | 188 | adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hblank_start + sync_pos; |
| 189 | adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + sync_width; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static void |
Ville Syrjälä | 5e7234c | 2015-09-25 16:37:43 +0300 | [diff] [blame] | 193 | centre_vertically(struct drm_display_mode *adjusted_mode, |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 194 | int height) |
| 195 | { |
| 196 | u32 border, sync_pos, blank_width, sync_width; |
| 197 | |
| 198 | /* keep the vsync and vblank widths constant */ |
Ville Syrjälä | 5e7234c | 2015-09-25 16:37:43 +0300 | [diff] [blame] | 199 | sync_width = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start; |
| 200 | blank_width = adjusted_mode->crtc_vblank_end - adjusted_mode->crtc_vblank_start; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 201 | sync_pos = (blank_width - sync_width + 1) / 2; |
| 202 | |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 203 | border = (adjusted_mode->crtc_vdisplay - height + 1) / 2; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 204 | |
Ville Syrjälä | 5e7234c | 2015-09-25 16:37:43 +0300 | [diff] [blame] | 205 | adjusted_mode->crtc_vdisplay = height; |
| 206 | adjusted_mode->crtc_vblank_start = height + border; |
| 207 | adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vblank_start + blank_width; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 208 | |
Ville Syrjälä | 5e7234c | 2015-09-25 16:37:43 +0300 | [diff] [blame] | 209 | adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vblank_start + sync_pos; |
| 210 | adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + sync_width; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | static inline u32 panel_fitter_scaling(u32 source, u32 target) |
| 214 | { |
| 215 | /* |
| 216 | * Floating point operation is not supported. So the FACTOR |
| 217 | * is defined, which can avoid the floating point computation |
| 218 | * when calculating the panel ratio. |
| 219 | */ |
| 220 | #define ACCURACY 12 |
| 221 | #define FACTOR (1 << ACCURACY) |
| 222 | u32 ratio = source * FACTOR / target; |
| 223 | return (FACTOR * ratio + FACTOR/2) / FACTOR; |
| 224 | } |
| 225 | |
Ander Conselvan de Oliveira | 5cec258 | 2015-01-15 14:55:21 +0200 | [diff] [blame] | 226 | static void i965_scale_aspect(struct intel_crtc_state *pipe_config, |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 227 | u32 *pfit_control) |
| 228 | { |
Ville Syrjälä | 7c5f93b | 2015-09-08 13:40:49 +0300 | [diff] [blame] | 229 | const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 230 | u32 scaled_width = adjusted_mode->crtc_hdisplay * |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 231 | pipe_config->pipe_src_h; |
| 232 | u32 scaled_height = pipe_config->pipe_src_w * |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 233 | adjusted_mode->crtc_vdisplay; |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 234 | |
| 235 | /* 965+ is easy, it does everything in hw */ |
| 236 | if (scaled_width > scaled_height) |
| 237 | *pfit_control |= PFIT_ENABLE | |
| 238 | PFIT_SCALING_PILLAR; |
| 239 | else if (scaled_width < scaled_height) |
| 240 | *pfit_control |= PFIT_ENABLE | |
| 241 | PFIT_SCALING_LETTER; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 242 | else if (adjusted_mode->crtc_hdisplay != pipe_config->pipe_src_w) |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 243 | *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO; |
| 244 | } |
| 245 | |
Ander Conselvan de Oliveira | 5cec258 | 2015-01-15 14:55:21 +0200 | [diff] [blame] | 246 | static void i9xx_scale_aspect(struct intel_crtc_state *pipe_config, |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 247 | u32 *pfit_control, u32 *pfit_pgm_ratios, |
| 248 | u32 *border) |
| 249 | { |
Ander Conselvan de Oliveira | 2d112de | 2015-01-15 14:55:22 +0200 | [diff] [blame] | 250 | struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 251 | u32 scaled_width = adjusted_mode->crtc_hdisplay * |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 252 | pipe_config->pipe_src_h; |
| 253 | u32 scaled_height = pipe_config->pipe_src_w * |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 254 | adjusted_mode->crtc_vdisplay; |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 255 | u32 bits; |
| 256 | |
| 257 | /* |
| 258 | * For earlier chips we have to calculate the scaling |
| 259 | * ratio by hand and program it into the |
| 260 | * PFIT_PGM_RATIO register |
| 261 | */ |
| 262 | if (scaled_width > scaled_height) { /* pillar */ |
| 263 | centre_horizontally(adjusted_mode, |
| 264 | scaled_height / |
| 265 | pipe_config->pipe_src_h); |
| 266 | |
| 267 | *border = LVDS_BORDER_ENABLE; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 268 | if (pipe_config->pipe_src_h != adjusted_mode->crtc_vdisplay) { |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 269 | bits = panel_fitter_scaling(pipe_config->pipe_src_h, |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 270 | adjusted_mode->crtc_vdisplay); |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 271 | |
| 272 | *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | |
| 273 | bits << PFIT_VERT_SCALE_SHIFT); |
| 274 | *pfit_control |= (PFIT_ENABLE | |
| 275 | VERT_INTERP_BILINEAR | |
| 276 | HORIZ_INTERP_BILINEAR); |
| 277 | } |
| 278 | } else if (scaled_width < scaled_height) { /* letter */ |
| 279 | centre_vertically(adjusted_mode, |
| 280 | scaled_width / |
| 281 | pipe_config->pipe_src_w); |
| 282 | |
| 283 | *border = LVDS_BORDER_ENABLE; |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 284 | if (pipe_config->pipe_src_w != adjusted_mode->crtc_hdisplay) { |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 285 | bits = panel_fitter_scaling(pipe_config->pipe_src_w, |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 286 | adjusted_mode->crtc_hdisplay); |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 287 | |
| 288 | *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | |
| 289 | bits << PFIT_VERT_SCALE_SHIFT); |
| 290 | *pfit_control |= (PFIT_ENABLE | |
| 291 | VERT_INTERP_BILINEAR | |
| 292 | HORIZ_INTERP_BILINEAR); |
| 293 | } |
| 294 | } else { |
| 295 | /* Aspects match, Let hw scale both directions */ |
| 296 | *pfit_control |= (PFIT_ENABLE | |
| 297 | VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | |
| 298 | VERT_INTERP_BILINEAR | |
| 299 | HORIZ_INTERP_BILINEAR); |
| 300 | } |
| 301 | } |
| 302 | |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 303 | void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc, |
Ander Conselvan de Oliveira | 5cec258 | 2015-01-15 14:55:21 +0200 | [diff] [blame] | 304 | struct intel_crtc_state *pipe_config, |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 305 | int fitting_mode) |
| 306 | { |
| 307 | struct drm_device *dev = intel_crtc->base.dev; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 308 | u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0; |
Ville Syrjälä | 7c5f93b | 2015-09-08 13:40:49 +0300 | [diff] [blame] | 309 | struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 310 | |
| 311 | /* Native modes don't need fitting */ |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 312 | if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w && |
| 313 | adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h) |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 314 | goto out; |
| 315 | |
| 316 | switch (fitting_mode) { |
| 317 | case DRM_MODE_SCALE_CENTER: |
| 318 | /* |
| 319 | * For centered modes, we have to calculate border widths & |
| 320 | * heights and modify the values programmed into the CRTC. |
| 321 | */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame] | 322 | centre_horizontally(adjusted_mode, pipe_config->pipe_src_w); |
| 323 | centre_vertically(adjusted_mode, pipe_config->pipe_src_h); |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 324 | border = LVDS_BORDER_ENABLE; |
| 325 | break; |
| 326 | case DRM_MODE_SCALE_ASPECT: |
| 327 | /* Scale but preserve the aspect ratio */ |
Daniel Vetter | 9084e7d | 2013-09-16 23:43:45 +0200 | [diff] [blame] | 328 | if (INTEL_INFO(dev)->gen >= 4) |
| 329 | i965_scale_aspect(pipe_config, &pfit_control); |
| 330 | else |
| 331 | i9xx_scale_aspect(pipe_config, &pfit_control, |
| 332 | &pfit_pgm_ratios, &border); |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 333 | break; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 334 | case DRM_MODE_SCALE_FULLSCREEN: |
| 335 | /* |
| 336 | * Full scaling, even if it changes the aspect ratio. |
| 337 | * Fortunately this is all done for us in hw. |
| 338 | */ |
Ville Syrjälä | aad941d | 2015-09-25 16:38:56 +0300 | [diff] [blame] | 339 | if (pipe_config->pipe_src_h != adjusted_mode->crtc_vdisplay || |
| 340 | pipe_config->pipe_src_w != adjusted_mode->crtc_hdisplay) { |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 341 | pfit_control |= PFIT_ENABLE; |
| 342 | if (INTEL_INFO(dev)->gen >= 4) |
| 343 | pfit_control |= PFIT_SCALING_AUTO; |
| 344 | else |
| 345 | pfit_control |= (VERT_AUTO_SCALE | |
| 346 | VERT_INTERP_BILINEAR | |
| 347 | HORIZ_AUTO_SCALE | |
| 348 | HORIZ_INTERP_BILINEAR); |
| 349 | } |
| 350 | break; |
Jesse Barnes | ab3e67f | 2013-04-25 12:55:03 -0700 | [diff] [blame] | 351 | default: |
| 352 | WARN(1, "bad panel fit mode: %d\n", fitting_mode); |
| 353 | return; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | /* 965+ wants fuzzy fitting */ |
| 357 | /* FIXME: handle multiple panels by failing gracefully */ |
| 358 | if (INTEL_INFO(dev)->gen >= 4) |
| 359 | pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) | |
| 360 | PFIT_FILTER_FUZZY); |
| 361 | |
| 362 | out: |
| 363 | if ((pfit_control & PFIT_ENABLE) == 0) { |
| 364 | pfit_control = 0; |
| 365 | pfit_pgm_ratios = 0; |
| 366 | } |
| 367 | |
Daniel Vetter | 6b89cdd | 2014-07-09 22:35:53 +0200 | [diff] [blame] | 368 | /* Make sure pre-965 set dither correctly for 18bpp panels. */ |
| 369 | if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18) |
| 370 | pfit_control |= PANEL_8TO6_DITHER_ENABLE; |
| 371 | |
Daniel Vetter | 2deefda | 2013-04-25 22:52:17 +0200 | [diff] [blame] | 372 | pipe_config->gmch_pfit.control = pfit_control; |
| 373 | pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios; |
Daniel Vetter | 68fc874 | 2013-04-25 22:52:16 +0200 | [diff] [blame] | 374 | pipe_config->gmch_pfit.lvds_border_bits = border; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Jani Nikula | 525997e | 2014-04-29 23:30:48 +0300 | [diff] [blame] | 377 | enum drm_connector_status |
| 378 | intel_panel_detect(struct drm_device *dev) |
| 379 | { |
| 380 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 381 | |
| 382 | /* Assume that the BIOS does not lie through the OpRegion... */ |
| 383 | if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) { |
Williams, Dan J | 115719f | 2015-10-12 21:12:57 +0000 | [diff] [blame] | 384 | return *dev_priv->opregion.lid_state & 0x1 ? |
Jani Nikula | 525997e | 2014-04-29 23:30:48 +0300 | [diff] [blame] | 385 | connector_status_connected : |
| 386 | connector_status_disconnected; |
| 387 | } |
| 388 | |
| 389 | switch (i915.panel_ignore_lid) { |
| 390 | case -2: |
| 391 | return connector_status_connected; |
| 392 | case -1: |
| 393 | return connector_status_disconnected; |
| 394 | default: |
| 395 | return connector_status_unknown; |
| 396 | } |
| 397 | } |
| 398 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 399 | /** |
| 400 | * scale - scale values from one range to another |
| 401 | * |
| 402 | * @source_val: value in range [@source_min..@source_max] |
| 403 | * |
| 404 | * Return @source_val in range [@source_min..@source_max] scaled to range |
| 405 | * [@target_min..@target_max]. |
| 406 | */ |
| 407 | static uint32_t scale(uint32_t source_val, |
| 408 | uint32_t source_min, uint32_t source_max, |
| 409 | uint32_t target_min, uint32_t target_max) |
| 410 | { |
| 411 | uint64_t target_val; |
| 412 | |
| 413 | WARN_ON(source_min > source_max); |
| 414 | WARN_ON(target_min > target_max); |
| 415 | |
| 416 | /* defensive */ |
| 417 | source_val = clamp(source_val, source_min, source_max); |
| 418 | |
| 419 | /* avoid overflows */ |
U. Artie Eoff | 673e7bb | 2014-09-29 15:49:32 -0700 | [diff] [blame] | 420 | target_val = DIV_ROUND_CLOSEST_ULL((uint64_t)(source_val - source_min) * |
| 421 | (target_max - target_min), source_max - source_min); |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 422 | target_val += target_min; |
| 423 | |
| 424 | return target_val; |
| 425 | } |
| 426 | |
| 427 | /* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */ |
| 428 | static inline u32 scale_user_to_hw(struct intel_connector *connector, |
| 429 | u32 user_level, u32 user_max) |
| 430 | { |
| 431 | struct intel_panel *panel = &connector->panel; |
| 432 | |
| 433 | return scale(user_level, 0, user_max, |
| 434 | panel->backlight.min, panel->backlight.max); |
| 435 | } |
| 436 | |
| 437 | /* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result |
| 438 | * to [hw_min..hw_max]. */ |
| 439 | static inline u32 clamp_user_to_hw(struct intel_connector *connector, |
| 440 | u32 user_level, u32 user_max) |
| 441 | { |
| 442 | struct intel_panel *panel = &connector->panel; |
| 443 | u32 hw_level; |
| 444 | |
| 445 | hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max); |
| 446 | hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max); |
| 447 | |
| 448 | return hw_level; |
| 449 | } |
| 450 | |
| 451 | /* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */ |
| 452 | static inline u32 scale_hw_to_user(struct intel_connector *connector, |
| 453 | u32 hw_level, u32 user_max) |
| 454 | { |
| 455 | struct intel_panel *panel = &connector->panel; |
| 456 | |
| 457 | return scale(hw_level, panel->backlight.min, panel->backlight.max, |
| 458 | 0, user_max); |
| 459 | } |
| 460 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 461 | static u32 intel_panel_compute_brightness(struct intel_connector *connector, |
| 462 | u32 val) |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 463 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 464 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 465 | struct intel_panel *panel = &connector->panel; |
| 466 | |
| 467 | WARN_ON(panel->backlight.max == 0); |
Carsten Emde | 4dca20e | 2012-03-15 15:56:26 +0100 | [diff] [blame] | 468 | |
Jani Nikula | d330a95 | 2014-01-21 11:24:25 +0200 | [diff] [blame] | 469 | if (i915.invert_brightness < 0) |
Carsten Emde | 4dca20e | 2012-03-15 15:56:26 +0100 | [diff] [blame] | 470 | return val; |
| 471 | |
Jani Nikula | d330a95 | 2014-01-21 11:24:25 +0200 | [diff] [blame] | 472 | if (i915.invert_brightness > 0 || |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 473 | dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 474 | return panel->backlight.max - val; |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 475 | } |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 476 | |
| 477 | return val; |
| 478 | } |
| 479 | |
Jani Nikula | 437b15b | 2015-09-04 16:55:13 +0300 | [diff] [blame] | 480 | static u32 lpt_get_backlight(struct intel_connector *connector) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 481 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 482 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 483 | |
| 484 | return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; |
| 485 | } |
| 486 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 487 | static u32 pch_get_backlight(struct intel_connector *connector) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 488 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 489 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 490 | |
| 491 | return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
| 492 | } |
| 493 | |
| 494 | static u32 i9xx_get_backlight(struct intel_connector *connector) |
| 495 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 496 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 497 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 498 | u32 val; |
| 499 | |
| 500 | val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 501 | if (INTEL_INFO(dev_priv)->gen < 4) |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 502 | val >>= 1; |
| 503 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 504 | if (panel->backlight.combination_mode) { |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 505 | u8 lbpc; |
| 506 | |
Joonas Lahtinen | e10fa55 | 2016-04-15 12:03:39 +0300 | [diff] [blame] | 507 | pci_read_config_byte(dev_priv->dev->pdev, LBPC, &lbpc); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 508 | val *= lbpc; |
| 509 | } |
| 510 | |
| 511 | return val; |
| 512 | } |
| 513 | |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 514 | static u32 _vlv_get_backlight(struct drm_i915_private *dev_priv, enum pipe pipe) |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 515 | { |
Ville Syrjälä | 23ec0a8 | 2014-11-07 11:15:59 +0200 | [diff] [blame] | 516 | if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B)) |
| 517 | return 0; |
| 518 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 519 | return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; |
| 520 | } |
| 521 | |
| 522 | static u32 vlv_get_backlight(struct intel_connector *connector) |
| 523 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 524 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 525 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
| 526 | |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 527 | return _vlv_get_backlight(dev_priv, pipe); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 528 | } |
| 529 | |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 530 | static u32 bxt_get_backlight(struct intel_connector *connector) |
| 531 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 532 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 533 | struct intel_panel *panel = &connector->panel; |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 534 | |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 535 | return I915_READ(BXT_BLC_PWM_DUTY(panel->backlight.controller)); |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 536 | } |
| 537 | |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 538 | static u32 pwm_get_backlight(struct intel_connector *connector) |
| 539 | { |
| 540 | struct intel_panel *panel = &connector->panel; |
| 541 | int duty_ns; |
| 542 | |
| 543 | duty_ns = pwm_get_duty_cycle(panel->backlight.pwm); |
| 544 | return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS); |
| 545 | } |
| 546 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 547 | static u32 intel_panel_get_backlight(struct intel_connector *connector) |
| 548 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 549 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Ville Syrjälä | 2d72f6c | 2014-11-07 15:18:45 +0200 | [diff] [blame] | 550 | struct intel_panel *panel = &connector->panel; |
| 551 | u32 val = 0; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 552 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 553 | mutex_lock(&dev_priv->backlight_lock); |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 554 | |
Ville Syrjälä | 2d72f6c | 2014-11-07 15:18:45 +0200 | [diff] [blame] | 555 | if (panel->backlight.enabled) { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 556 | val = panel->backlight.get(connector); |
Ville Syrjälä | 2d72f6c | 2014-11-07 15:18:45 +0200 | [diff] [blame] | 557 | val = intel_panel_compute_brightness(connector, val); |
| 558 | } |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 559 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 560 | mutex_unlock(&dev_priv->backlight_lock); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 561 | |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 562 | DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val); |
| 563 | return val; |
| 564 | } |
| 565 | |
Jani Nikula | 437b15b | 2015-09-04 16:55:13 +0300 | [diff] [blame] | 566 | static void lpt_set_backlight(struct intel_connector *connector, u32 level) |
Ben Widawsky | f8e1006 | 2013-11-11 11:12:57 +0200 | [diff] [blame] | 567 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 568 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Ben Widawsky | f8e1006 | 2013-11-11 11:12:57 +0200 | [diff] [blame] | 569 | u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; |
| 570 | I915_WRITE(BLC_PWM_PCH_CTL2, val | level); |
| 571 | } |
| 572 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 573 | static void pch_set_backlight(struct intel_connector *connector, u32 level) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 574 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 575 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 576 | u32 tmp; |
| 577 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 578 | tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; |
| 579 | I915_WRITE(BLC_PWM_CPU_CTL, tmp | level); |
| 580 | } |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 581 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 582 | static void i9xx_set_backlight(struct intel_connector *connector, u32 level) |
| 583 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 584 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 585 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | b329b32 | 2013-11-08 16:48:57 +0200 | [diff] [blame] | 586 | u32 tmp, mask; |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 587 | |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 588 | WARN_ON(panel->backlight.max == 0); |
| 589 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 590 | if (panel->backlight.combination_mode) { |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 591 | u8 lbpc; |
| 592 | |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 593 | lbpc = level * 0xfe / panel->backlight.max + 1; |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 594 | level /= lbpc; |
Joonas Lahtinen | e10fa55 | 2016-04-15 12:03:39 +0300 | [diff] [blame] | 595 | pci_write_config_byte(dev_priv->dev->pdev, LBPC, lbpc); |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 596 | } |
| 597 | |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 598 | if (IS_GEN4(dev_priv)) { |
Jani Nikula | b329b32 | 2013-11-08 16:48:57 +0200 | [diff] [blame] | 599 | mask = BACKLIGHT_DUTY_CYCLE_MASK; |
| 600 | } else { |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 601 | level <<= 1; |
Jani Nikula | b329b32 | 2013-11-08 16:48:57 +0200 | [diff] [blame] | 602 | mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV; |
| 603 | } |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 604 | |
Jani Nikula | b329b32 | 2013-11-08 16:48:57 +0200 | [diff] [blame] | 605 | tmp = I915_READ(BLC_PWM_CTL) & ~mask; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 606 | I915_WRITE(BLC_PWM_CTL, tmp | level); |
| 607 | } |
| 608 | |
| 609 | static void vlv_set_backlight(struct intel_connector *connector, u32 level) |
| 610 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 611 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 612 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
| 613 | u32 tmp; |
| 614 | |
Ville Syrjälä | 23ec0a8 | 2014-11-07 11:15:59 +0200 | [diff] [blame] | 615 | if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B)) |
| 616 | return; |
| 617 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 618 | tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK; |
| 619 | I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level); |
| 620 | } |
| 621 | |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 622 | static void bxt_set_backlight(struct intel_connector *connector, u32 level) |
| 623 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 624 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 625 | struct intel_panel *panel = &connector->panel; |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 626 | |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 627 | I915_WRITE(BXT_BLC_PWM_DUTY(panel->backlight.controller), level); |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 628 | } |
| 629 | |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 630 | static void pwm_set_backlight(struct intel_connector *connector, u32 level) |
| 631 | { |
| 632 | struct intel_panel *panel = &connector->panel; |
| 633 | int duty_ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100); |
| 634 | |
| 635 | pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS); |
| 636 | } |
| 637 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 638 | static void |
| 639 | intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level) |
| 640 | { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 641 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 642 | |
| 643 | DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); |
| 644 | |
| 645 | level = intel_panel_compute_brightness(connector, level); |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 646 | panel->backlight.set(connector, level); |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 647 | } |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 648 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 649 | /* set backlight brightness to level in range [0..max], scaling wrt hw min */ |
| 650 | static void intel_panel_set_backlight(struct intel_connector *connector, |
| 651 | u32 user_level, u32 user_max) |
Takashi Iwai | f52c619 | 2011-10-14 11:45:40 +0200 | [diff] [blame] | 652 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 653 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 654 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 655 | u32 hw_level; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 656 | |
Ville Syrjälä | 260d8f9 | 2014-11-07 15:20:23 +0200 | [diff] [blame] | 657 | if (!panel->backlight.present) |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 658 | return; |
| 659 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 660 | mutex_lock(&dev_priv->backlight_lock); |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 661 | |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 662 | WARN_ON(panel->backlight.max == 0); |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 663 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 664 | hw_level = scale_user_to_hw(connector, user_level, user_max); |
| 665 | panel->backlight.level = hw_level; |
Jani Nikula | b6b3ba5 | 2013-03-12 11:44:15 +0200 | [diff] [blame] | 666 | |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 667 | if (panel->backlight.enabled) |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 668 | intel_panel_actually_set_backlight(connector, hw_level); |
| 669 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 670 | mutex_unlock(&dev_priv->backlight_lock); |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | /* set backlight brightness to level in range [0..max], assuming hw min is |
| 674 | * respected. |
| 675 | */ |
| 676 | void intel_panel_set_backlight_acpi(struct intel_connector *connector, |
| 677 | u32 user_level, u32 user_max) |
| 678 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 679 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 680 | struct intel_panel *panel = &connector->panel; |
| 681 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
| 682 | u32 hw_level; |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 683 | |
Ville Syrjälä | 260d8f9 | 2014-11-07 15:20:23 +0200 | [diff] [blame] | 684 | /* |
| 685 | * INVALID_PIPE may occur during driver init because |
| 686 | * connection_mutex isn't held across the entire backlight |
| 687 | * setup + modeset readout, and the BIOS can issue the |
| 688 | * requests at any time. |
| 689 | */ |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 690 | if (!panel->backlight.present || pipe == INVALID_PIPE) |
| 691 | return; |
| 692 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 693 | mutex_lock(&dev_priv->backlight_lock); |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 694 | |
| 695 | WARN_ON(panel->backlight.max == 0); |
| 696 | |
| 697 | hw_level = clamp_user_to_hw(connector, user_level, user_max); |
| 698 | panel->backlight.level = hw_level; |
| 699 | |
| 700 | if (panel->backlight.device) |
| 701 | panel->backlight.device->props.brightness = |
| 702 | scale_hw_to_user(connector, |
| 703 | panel->backlight.level, |
| 704 | panel->backlight.device->props.max_brightness); |
| 705 | |
| 706 | if (panel->backlight.enabled) |
| 707 | intel_panel_actually_set_backlight(connector, hw_level); |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 708 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 709 | mutex_unlock(&dev_priv->backlight_lock); |
Takashi Iwai | f52c619 | 2011-10-14 11:45:40 +0200 | [diff] [blame] | 710 | } |
| 711 | |
Jani Nikula | 437b15b | 2015-09-04 16:55:13 +0300 | [diff] [blame] | 712 | static void lpt_disable_backlight(struct intel_connector *connector) |
| 713 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 714 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 437b15b | 2015-09-04 16:55:13 +0300 | [diff] [blame] | 715 | u32 tmp; |
| 716 | |
| 717 | intel_panel_actually_set_backlight(connector, 0); |
| 718 | |
Jani Nikula | 6675bce | 2015-10-28 13:57:09 +0200 | [diff] [blame] | 719 | /* |
| 720 | * Although we don't support or enable CPU PWM with LPT/SPT based |
| 721 | * systems, it may have been enabled prior to loading the |
| 722 | * driver. Disable to avoid warnings on LCPLL disable. |
| 723 | * |
| 724 | * This needs rework if we need to add support for CPU PWM on PCH split |
| 725 | * platforms. |
| 726 | */ |
| 727 | tmp = I915_READ(BLC_PWM_CPU_CTL2); |
| 728 | if (tmp & BLM_PWM_ENABLE) { |
| 729 | DRM_DEBUG_KMS("cpu backlight was enabled, disabling\n"); |
| 730 | I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); |
| 731 | } |
| 732 | |
Jani Nikula | 437b15b | 2015-09-04 16:55:13 +0300 | [diff] [blame] | 733 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
| 734 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); |
| 735 | } |
| 736 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 737 | static void pch_disable_backlight(struct intel_connector *connector) |
| 738 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 739 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 740 | u32 tmp; |
| 741 | |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 742 | intel_panel_actually_set_backlight(connector, 0); |
| 743 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 744 | tmp = I915_READ(BLC_PWM_CPU_CTL2); |
| 745 | I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); |
| 746 | |
| 747 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
| 748 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); |
| 749 | } |
| 750 | |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 751 | static void i9xx_disable_backlight(struct intel_connector *connector) |
| 752 | { |
| 753 | intel_panel_actually_set_backlight(connector, 0); |
| 754 | } |
| 755 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 756 | static void i965_disable_backlight(struct intel_connector *connector) |
| 757 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 758 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 759 | u32 tmp; |
| 760 | |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 761 | intel_panel_actually_set_backlight(connector, 0); |
| 762 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 763 | tmp = I915_READ(BLC_PWM_CTL2); |
| 764 | I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); |
| 765 | } |
| 766 | |
| 767 | static void vlv_disable_backlight(struct intel_connector *connector) |
| 768 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 769 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 770 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
| 771 | u32 tmp; |
| 772 | |
Ville Syrjälä | 23ec0a8 | 2014-11-07 11:15:59 +0200 | [diff] [blame] | 773 | if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B)) |
| 774 | return; |
| 775 | |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 776 | intel_panel_actually_set_backlight(connector, 0); |
| 777 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 778 | tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe)); |
| 779 | I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE); |
| 780 | } |
| 781 | |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 782 | static void bxt_disable_backlight(struct intel_connector *connector) |
| 783 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 784 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 785 | struct intel_panel *panel = &connector->panel; |
| 786 | u32 tmp, val; |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 787 | |
| 788 | intel_panel_actually_set_backlight(connector, 0); |
| 789 | |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 790 | tmp = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); |
| 791 | I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), |
| 792 | tmp & ~BXT_BLC_PWM_ENABLE); |
| 793 | |
| 794 | if (panel->backlight.controller == 1) { |
| 795 | val = I915_READ(UTIL_PIN_CTL); |
| 796 | val &= ~UTIL_PIN_ENABLE; |
| 797 | I915_WRITE(UTIL_PIN_CTL, val); |
| 798 | } |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 799 | } |
| 800 | |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 801 | static void pwm_disable_backlight(struct intel_connector *connector) |
| 802 | { |
| 803 | struct intel_panel *panel = &connector->panel; |
| 804 | |
| 805 | /* Disable the backlight */ |
| 806 | pwm_config(panel->backlight.pwm, 0, CRC_PMIC_PWM_PERIOD_NS); |
| 807 | usleep_range(2000, 3000); |
| 808 | pwm_disable(panel->backlight.pwm); |
| 809 | } |
| 810 | |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 811 | void intel_panel_disable_backlight(struct intel_connector *connector) |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 812 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 813 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 814 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 815 | |
Ville Syrjälä | 260d8f9 | 2014-11-07 15:20:23 +0200 | [diff] [blame] | 816 | if (!panel->backlight.present) |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 817 | return; |
| 818 | |
Jani Nikula | 3f57757 | 2013-07-25 14:31:30 +0300 | [diff] [blame] | 819 | /* |
Lukas Wunner | 5389e91 | 2015-09-04 21:06:15 +0200 | [diff] [blame] | 820 | * Do not disable backlight on the vga_switcheroo path. When switching |
Jani Nikula | 3f57757 | 2013-07-25 14:31:30 +0300 | [diff] [blame] | 821 | * away from i915, the other client may depend on i915 to handle the |
| 822 | * backlight. This will leave the backlight on unnecessarily when |
| 823 | * another client is not activated. |
| 824 | */ |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 825 | if (dev_priv->dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) { |
Jani Nikula | 3f57757 | 2013-07-25 14:31:30 +0300 | [diff] [blame] | 826 | DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n"); |
| 827 | return; |
| 828 | } |
| 829 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 830 | mutex_lock(&dev_priv->backlight_lock); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 831 | |
Jani Nikula | ab656bb | 2014-08-13 12:10:12 +0300 | [diff] [blame] | 832 | if (panel->backlight.device) |
| 833 | panel->backlight.device->props.power = FB_BLANK_POWERDOWN; |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 834 | panel->backlight.enabled = false; |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 835 | panel->backlight.disable(connector); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 836 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 837 | mutex_unlock(&dev_priv->backlight_lock); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 838 | } |
| 839 | |
Jani Nikula | 437b15b | 2015-09-04 16:55:13 +0300 | [diff] [blame] | 840 | static void lpt_enable_backlight(struct intel_connector *connector) |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 841 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 842 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 843 | struct intel_panel *panel = &connector->panel; |
| 844 | u32 pch_ctl1, pch_ctl2; |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 845 | |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 846 | pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); |
| 847 | if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { |
| 848 | DRM_DEBUG_KMS("pch backlight already enabled\n"); |
| 849 | pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; |
| 850 | I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 851 | } |
| 852 | |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 853 | pch_ctl2 = panel->backlight.max << 16; |
| 854 | I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2); |
| 855 | |
| 856 | pch_ctl1 = 0; |
| 857 | if (panel->backlight.active_low_pwm) |
| 858 | pch_ctl1 |= BLM_PCH_POLARITY; |
| 859 | |
Jani Nikula | e6b2627 | 2014-10-10 17:53:33 +0300 | [diff] [blame] | 860 | /* After LPT, override is the default. */ |
| 861 | if (HAS_PCH_LPT(dev_priv)) |
| 862 | pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 863 | |
| 864 | I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); |
| 865 | POSTING_READ(BLC_PWM_PCH_CTL1); |
| 866 | I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE); |
| 867 | |
| 868 | /* This won't stick until the above enable. */ |
| 869 | intel_panel_actually_set_backlight(connector, panel->backlight.level); |
| 870 | } |
| 871 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 872 | static void pch_enable_backlight(struct intel_connector *connector) |
| 873 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 874 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 875 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 876 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
| 877 | enum transcoder cpu_transcoder = |
| 878 | intel_pipe_to_cpu_transcoder(dev_priv, pipe); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 879 | u32 cpu_ctl2, pch_ctl1, pch_ctl2; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 880 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 881 | cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2); |
| 882 | if (cpu_ctl2 & BLM_PWM_ENABLE) { |
Scot Doyle | 813008c | 2014-08-19 02:07:13 +0000 | [diff] [blame] | 883 | DRM_DEBUG_KMS("cpu backlight already enabled\n"); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 884 | cpu_ctl2 &= ~BLM_PWM_ENABLE; |
| 885 | I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 886 | } |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 887 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 888 | pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); |
| 889 | if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { |
| 890 | DRM_DEBUG_KMS("pch backlight already enabled\n"); |
| 891 | pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; |
| 892 | I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); |
| 893 | } |
| 894 | |
| 895 | if (cpu_transcoder == TRANSCODER_EDP) |
| 896 | cpu_ctl2 = BLM_TRANSCODER_EDP; |
| 897 | else |
| 898 | cpu_ctl2 = BLM_PIPE(cpu_transcoder); |
| 899 | I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2); |
| 900 | POSTING_READ(BLC_PWM_CPU_CTL2); |
| 901 | I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); |
| 902 | |
| 903 | /* This won't stick until the above enable. */ |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 904 | intel_panel_actually_set_backlight(connector, panel->backlight.level); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 905 | |
| 906 | pch_ctl2 = panel->backlight.max << 16; |
| 907 | I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2); |
| 908 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 909 | pch_ctl1 = 0; |
| 910 | if (panel->backlight.active_low_pwm) |
| 911 | pch_ctl1 |= BLM_PCH_POLARITY; |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 912 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 913 | I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); |
| 914 | POSTING_READ(BLC_PWM_PCH_CTL1); |
| 915 | I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE); |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 916 | } |
| 917 | |
| 918 | static void i9xx_enable_backlight(struct intel_connector *connector) |
| 919 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 920 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 921 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 922 | u32 ctl, freq; |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 923 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 924 | ctl = I915_READ(BLC_PWM_CTL); |
| 925 | if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) { |
Scot Doyle | 813008c | 2014-08-19 02:07:13 +0000 | [diff] [blame] | 926 | DRM_DEBUG_KMS("backlight already enabled\n"); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 927 | I915_WRITE(BLC_PWM_CTL, 0); |
| 928 | } |
| 929 | |
| 930 | freq = panel->backlight.max; |
| 931 | if (panel->backlight.combination_mode) |
| 932 | freq /= 0xff; |
| 933 | |
| 934 | ctl = freq << 17; |
Jani Nikula | b6ab66aa | 2014-02-25 13:11:47 +0200 | [diff] [blame] | 935 | if (panel->backlight.combination_mode) |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 936 | ctl |= BLM_LEGACY_MODE; |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 937 | if (IS_PINEVIEW(dev_priv) && panel->backlight.active_low_pwm) |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 938 | ctl |= BLM_POLARITY_PNV; |
| 939 | |
| 940 | I915_WRITE(BLC_PWM_CTL, ctl); |
| 941 | POSTING_READ(BLC_PWM_CTL); |
| 942 | |
| 943 | /* XXX: combine this into above write? */ |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 944 | intel_panel_actually_set_backlight(connector, panel->backlight.level); |
Jani Nikula | 2059ac3 | 2015-06-26 14:18:56 +0300 | [diff] [blame] | 945 | |
| 946 | /* |
| 947 | * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is |
| 948 | * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2 |
| 949 | * that has backlight. |
| 950 | */ |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 951 | if (IS_GEN2(dev_priv)) |
Jani Nikula | 2059ac3 | 2015-06-26 14:18:56 +0300 | [diff] [blame] | 952 | I915_WRITE(BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 953 | } |
| 954 | |
| 955 | static void i965_enable_backlight(struct intel_connector *connector) |
| 956 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 957 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 958 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 959 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 960 | u32 ctl, ctl2, freq; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 961 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 962 | ctl2 = I915_READ(BLC_PWM_CTL2); |
| 963 | if (ctl2 & BLM_PWM_ENABLE) { |
Scot Doyle | 813008c | 2014-08-19 02:07:13 +0000 | [diff] [blame] | 964 | DRM_DEBUG_KMS("backlight already enabled\n"); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 965 | ctl2 &= ~BLM_PWM_ENABLE; |
| 966 | I915_WRITE(BLC_PWM_CTL2, ctl2); |
| 967 | } |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 968 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 969 | freq = panel->backlight.max; |
| 970 | if (panel->backlight.combination_mode) |
| 971 | freq /= 0xff; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 972 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 973 | ctl = freq << 16; |
| 974 | I915_WRITE(BLC_PWM_CTL, ctl); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 975 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 976 | ctl2 = BLM_PIPE(pipe); |
| 977 | if (panel->backlight.combination_mode) |
| 978 | ctl2 |= BLM_COMBINATION_MODE; |
| 979 | if (panel->backlight.active_low_pwm) |
| 980 | ctl2 |= BLM_POLARITY_I965; |
| 981 | I915_WRITE(BLC_PWM_CTL2, ctl2); |
| 982 | POSTING_READ(BLC_PWM_CTL2); |
| 983 | I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); |
Jani Nikula | 2e7eeeb | 2014-06-09 18:24:34 +0300 | [diff] [blame] | 984 | |
| 985 | intel_panel_actually_set_backlight(connector, panel->backlight.level); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 986 | } |
| 987 | |
| 988 | static void vlv_enable_backlight(struct intel_connector *connector) |
| 989 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 990 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 991 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 992 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 993 | u32 ctl, ctl2; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 994 | |
Ville Syrjälä | 23ec0a8 | 2014-11-07 11:15:59 +0200 | [diff] [blame] | 995 | if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B)) |
| 996 | return; |
| 997 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 998 | ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe)); |
| 999 | if (ctl2 & BLM_PWM_ENABLE) { |
Scot Doyle | 813008c | 2014-08-19 02:07:13 +0000 | [diff] [blame] | 1000 | DRM_DEBUG_KMS("backlight already enabled\n"); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 1001 | ctl2 &= ~BLM_PWM_ENABLE; |
| 1002 | I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2); |
| 1003 | } |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1004 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 1005 | ctl = panel->backlight.max << 16; |
| 1006 | I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1007 | |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 1008 | /* XXX: combine this into above write? */ |
Jani Nikula | 3bd712e | 2013-11-08 16:48:59 +0200 | [diff] [blame] | 1009 | intel_panel_actually_set_backlight(connector, panel->backlight.level); |
Jani Nikula | b35684b | 2013-11-14 12:13:41 +0200 | [diff] [blame] | 1010 | |
| 1011 | ctl2 = 0; |
| 1012 | if (panel->backlight.active_low_pwm) |
| 1013 | ctl2 |= BLM_POLARITY_I965; |
| 1014 | I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2); |
| 1015 | POSTING_READ(VLV_BLC_PWM_CTL2(pipe)); |
| 1016 | I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1017 | } |
| 1018 | |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1019 | static void bxt_enable_backlight(struct intel_connector *connector) |
| 1020 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1021 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1022 | struct intel_panel *panel = &connector->panel; |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 1023 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
| 1024 | u32 pwm_ctl, val; |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1025 | |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 1026 | /* To use 2nd set of backlight registers, utility pin has to be |
| 1027 | * enabled with PWM mode. |
| 1028 | * The field should only be changed when the utility pin is disabled |
| 1029 | */ |
| 1030 | if (panel->backlight.controller == 1) { |
| 1031 | val = I915_READ(UTIL_PIN_CTL); |
| 1032 | if (val & UTIL_PIN_ENABLE) { |
| 1033 | DRM_DEBUG_KMS("util pin already enabled\n"); |
| 1034 | val &= ~UTIL_PIN_ENABLE; |
| 1035 | I915_WRITE(UTIL_PIN_CTL, val); |
| 1036 | } |
| 1037 | |
| 1038 | val = 0; |
| 1039 | if (panel->backlight.util_pin_active_low) |
| 1040 | val |= UTIL_PIN_POLARITY; |
| 1041 | I915_WRITE(UTIL_PIN_CTL, val | UTIL_PIN_PIPE(pipe) | |
| 1042 | UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE); |
| 1043 | } |
| 1044 | |
| 1045 | pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1046 | if (pwm_ctl & BXT_BLC_PWM_ENABLE) { |
| 1047 | DRM_DEBUG_KMS("backlight already enabled\n"); |
| 1048 | pwm_ctl &= ~BXT_BLC_PWM_ENABLE; |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 1049 | I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), |
| 1050 | pwm_ctl); |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1051 | } |
| 1052 | |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 1053 | I915_WRITE(BXT_BLC_PWM_FREQ(panel->backlight.controller), |
| 1054 | panel->backlight.max); |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1055 | |
| 1056 | intel_panel_actually_set_backlight(connector, panel->backlight.level); |
| 1057 | |
| 1058 | pwm_ctl = 0; |
| 1059 | if (panel->backlight.active_low_pwm) |
| 1060 | pwm_ctl |= BXT_BLC_PWM_POLARITY; |
| 1061 | |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 1062 | I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); |
| 1063 | POSTING_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); |
| 1064 | I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), |
| 1065 | pwm_ctl | BXT_BLC_PWM_ENABLE); |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1066 | } |
| 1067 | |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 1068 | static void pwm_enable_backlight(struct intel_connector *connector) |
| 1069 | { |
| 1070 | struct intel_panel *panel = &connector->panel; |
| 1071 | |
| 1072 | pwm_enable(panel->backlight.pwm); |
| 1073 | intel_panel_actually_set_backlight(connector, panel->backlight.level); |
| 1074 | } |
| 1075 | |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1076 | void intel_panel_enable_backlight(struct intel_connector *connector) |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 1077 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1078 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1079 | struct intel_panel *panel = &connector->panel; |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1080 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 1081 | |
Ville Syrjälä | 260d8f9 | 2014-11-07 15:20:23 +0200 | [diff] [blame] | 1082 | if (!panel->backlight.present) |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1083 | return; |
| 1084 | |
Damien Lespiau | 6f2bcce | 2013-10-16 12:29:54 +0100 | [diff] [blame] | 1085 | DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe)); |
Chris Wilson | 540b5d0 | 2013-10-13 12:56:31 +0100 | [diff] [blame] | 1086 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 1087 | mutex_lock(&dev_priv->backlight_lock); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 1088 | |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 1089 | WARN_ON(panel->backlight.max == 0); |
| 1090 | |
Jeremiah Mahler | 13f3fbe | 2015-01-12 11:01:03 -0800 | [diff] [blame] | 1091 | if (panel->backlight.level <= panel->backlight.min) { |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 1092 | panel->backlight.level = panel->backlight.max; |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1093 | if (panel->backlight.device) |
| 1094 | panel->backlight.device->props.brightness = |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1095 | scale_hw_to_user(connector, |
| 1096 | panel->backlight.level, |
| 1097 | panel->backlight.device->props.max_brightness); |
Jani Nikula | b6b3ba5 | 2013-03-12 11:44:15 +0200 | [diff] [blame] | 1098 | } |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 1099 | |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1100 | panel->backlight.enable(connector); |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1101 | panel->backlight.enabled = true; |
Jani Nikula | ab656bb | 2014-08-13 12:10:12 +0300 | [diff] [blame] | 1102 | if (panel->backlight.device) |
| 1103 | panel->backlight.device->props.power = FB_BLANK_UNBLANK; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 1104 | |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 1105 | mutex_unlock(&dev_priv->backlight_lock); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 1106 | } |
| 1107 | |
Jani Nikula | 912e8b1 | 2013-09-18 17:19:45 +0300 | [diff] [blame] | 1108 | #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1109 | static int intel_backlight_device_update_status(struct backlight_device *bd) |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1110 | { |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1111 | struct intel_connector *connector = bl_get_data(bd); |
Jani Nikula | ab656bb | 2014-08-13 12:10:12 +0300 | [diff] [blame] | 1112 | struct intel_panel *panel = &connector->panel; |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1113 | struct drm_device *dev = connector->base.dev; |
| 1114 | |
Rob Clark | 51fd371 | 2013-11-19 12:10:12 -0500 | [diff] [blame] | 1115 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); |
Chris Wilson | 540b5d0 | 2013-10-13 12:56:31 +0100 | [diff] [blame] | 1116 | DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", |
| 1117 | bd->props.brightness, bd->props.max_brightness); |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1118 | intel_panel_set_backlight(connector, bd->props.brightness, |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 1119 | bd->props.max_brightness); |
Jani Nikula | ab656bb | 2014-08-13 12:10:12 +0300 | [diff] [blame] | 1120 | |
| 1121 | /* |
| 1122 | * Allow flipping bl_power as a sub-state of enabled. Sadly the |
| 1123 | * backlight class device does not make it easy to to differentiate |
| 1124 | * between callbacks for brightness and bl_power, so our backlight_power |
| 1125 | * callback needs to take this into account. |
| 1126 | */ |
| 1127 | if (panel->backlight.enabled) { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1128 | if (panel->backlight.power) { |
Jani Nikula | e6755fb | 2014-08-12 17:11:42 +0300 | [diff] [blame] | 1129 | bool enable = bd->props.power == FB_BLANK_UNBLANK && |
| 1130 | bd->props.brightness != 0; |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1131 | panel->backlight.power(connector, enable); |
Jani Nikula | ab656bb | 2014-08-13 12:10:12 +0300 | [diff] [blame] | 1132 | } |
| 1133 | } else { |
| 1134 | bd->props.power = FB_BLANK_POWERDOWN; |
| 1135 | } |
| 1136 | |
Rob Clark | 51fd371 | 2013-11-19 12:10:12 -0500 | [diff] [blame] | 1137 | drm_modeset_unlock(&dev->mode_config.connection_mutex); |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1138 | return 0; |
| 1139 | } |
| 1140 | |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1141 | static int intel_backlight_device_get_brightness(struct backlight_device *bd) |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1142 | { |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1143 | struct intel_connector *connector = bl_get_data(bd); |
| 1144 | struct drm_device *dev = connector->base.dev; |
Paulo Zanoni | c8c8fb3 | 2013-11-27 18:21:54 -0200 | [diff] [blame] | 1145 | struct drm_i915_private *dev_priv = dev->dev_private; |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1146 | u32 hw_level; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1147 | int ret; |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1148 | |
Paulo Zanoni | c8c8fb3 | 2013-11-27 18:21:54 -0200 | [diff] [blame] | 1149 | intel_runtime_pm_get(dev_priv); |
Rob Clark | 51fd371 | 2013-11-19 12:10:12 -0500 | [diff] [blame] | 1150 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1151 | |
| 1152 | hw_level = intel_panel_get_backlight(connector); |
| 1153 | ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness); |
| 1154 | |
Rob Clark | 51fd371 | 2013-11-19 12:10:12 -0500 | [diff] [blame] | 1155 | drm_modeset_unlock(&dev->mode_config.connection_mutex); |
Paulo Zanoni | c8c8fb3 | 2013-11-27 18:21:54 -0200 | [diff] [blame] | 1156 | intel_runtime_pm_put(dev_priv); |
Jesse Barnes | 752aa88 | 2013-10-31 18:55:49 +0200 | [diff] [blame] | 1157 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1158 | return ret; |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1159 | } |
| 1160 | |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1161 | static const struct backlight_ops intel_backlight_device_ops = { |
| 1162 | .update_status = intel_backlight_device_update_status, |
| 1163 | .get_brightness = intel_backlight_device_get_brightness, |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1164 | }; |
| 1165 | |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1166 | static int intel_backlight_device_register(struct intel_connector *connector) |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1167 | { |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1168 | struct intel_panel *panel = &connector->panel; |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1169 | struct backlight_properties props; |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1170 | |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1171 | if (WARN_ON(panel->backlight.device)) |
Jani Nikula | dc652f9 | 2013-04-12 15:18:38 +0300 | [diff] [blame] | 1172 | return -ENODEV; |
| 1173 | |
Ville Syrjälä | 0962c3c | 2014-11-07 15:19:46 +0200 | [diff] [blame] | 1174 | if (!panel->backlight.present) |
| 1175 | return 0; |
| 1176 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1177 | WARN_ON(panel->backlight.max == 0); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1178 | |
Corentin Chary | af437cf | 2012-05-22 10:29:46 +0100 | [diff] [blame] | 1179 | memset(&props, 0, sizeof(props)); |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1180 | props.type = BACKLIGHT_RAW; |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1181 | |
| 1182 | /* |
| 1183 | * Note: Everything should work even if the backlight device max |
| 1184 | * presented to the userspace is arbitrarily chosen. |
| 1185 | */ |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1186 | props.max_brightness = panel->backlight.max; |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1187 | props.brightness = scale_hw_to_user(connector, |
| 1188 | panel->backlight.level, |
| 1189 | props.max_brightness); |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1190 | |
Jani Nikula | ab656bb | 2014-08-13 12:10:12 +0300 | [diff] [blame] | 1191 | if (panel->backlight.enabled) |
| 1192 | props.power = FB_BLANK_UNBLANK; |
| 1193 | else |
| 1194 | props.power = FB_BLANK_POWERDOWN; |
| 1195 | |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1196 | /* |
| 1197 | * Note: using the same name independent of the connector prevents |
| 1198 | * registration of multiple backlight devices in the driver. |
| 1199 | */ |
| 1200 | panel->backlight.device = |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1201 | backlight_device_register("intel_backlight", |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1202 | connector->base.kdev, |
| 1203 | connector, |
| 1204 | &intel_backlight_device_ops, &props); |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1205 | |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1206 | if (IS_ERR(panel->backlight.device)) { |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1207 | DRM_ERROR("Failed to register backlight: %ld\n", |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1208 | PTR_ERR(panel->backlight.device)); |
| 1209 | panel->backlight.device = NULL; |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1210 | return -ENODEV; |
| 1211 | } |
Ville Syrjälä | 0962c3c | 2014-11-07 15:19:46 +0200 | [diff] [blame] | 1212 | |
| 1213 | DRM_DEBUG_KMS("Connector %s backlight sysfs interface registered\n", |
| 1214 | connector->base.name); |
| 1215 | |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1216 | return 0; |
| 1217 | } |
| 1218 | |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1219 | static void intel_backlight_device_unregister(struct intel_connector *connector) |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1220 | { |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1221 | struct intel_panel *panel = &connector->panel; |
| 1222 | |
| 1223 | if (panel->backlight.device) { |
| 1224 | backlight_device_unregister(panel->backlight.device); |
| 1225 | panel->backlight.device = NULL; |
Jani Nikula | dc652f9 | 2013-04-12 15:18:38 +0300 | [diff] [blame] | 1226 | } |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1227 | } |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1228 | #else /* CONFIG_BACKLIGHT_CLASS_DEVICE */ |
| 1229 | static int intel_backlight_device_register(struct intel_connector *connector) |
| 1230 | { |
| 1231 | return 0; |
| 1232 | } |
| 1233 | static void intel_backlight_device_unregister(struct intel_connector *connector) |
| 1234 | { |
| 1235 | } |
| 1236 | #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ |
| 1237 | |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 1238 | /* |
Jani Nikula | 2dd6982 | 2015-12-01 10:23:50 +0200 | [diff] [blame] | 1239 | * BXT: PWM clock frequency = 19.2 MHz. |
| 1240 | */ |
| 1241 | static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) |
| 1242 | { |
Ville Syrjälä | 37f2248 | 2016-03-02 17:22:18 +0200 | [diff] [blame] | 1243 | return DIV_ROUND_CLOSEST(KHz(19200), pwm_freq_hz); |
Jani Nikula | 2dd6982 | 2015-12-01 10:23:50 +0200 | [diff] [blame] | 1244 | } |
| 1245 | |
| 1246 | /* |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1247 | * SPT: This value represents the period of the PWM stream in clock periods |
| 1248 | * multiplied by 16 (default increment) or 128 (alternate increment selected in |
| 1249 | * SCHICKEN_1 bit 0). PWM clock is 24 MHz. |
| 1250 | */ |
| 1251 | static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) |
| 1252 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1253 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1254 | u32 mul; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1255 | |
| 1256 | if (I915_READ(SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY) |
| 1257 | mul = 128; |
| 1258 | else |
| 1259 | mul = 16; |
| 1260 | |
Ville Syrjälä | 37f2248 | 2016-03-02 17:22:18 +0200 | [diff] [blame] | 1261 | return DIV_ROUND_CLOSEST(MHz(24), pwm_freq_hz * mul); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1262 | } |
| 1263 | |
| 1264 | /* |
| 1265 | * LPT: This value represents the period of the PWM stream in clock periods |
| 1266 | * multiplied by 128 (default increment) or 16 (alternate increment, selected in |
| 1267 | * LPT SOUTH_CHICKEN2 register bit 5). |
| 1268 | */ |
| 1269 | static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) |
| 1270 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1271 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1272 | u32 mul, clock; |
| 1273 | |
| 1274 | if (I915_READ(SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY) |
| 1275 | mul = 16; |
| 1276 | else |
| 1277 | mul = 128; |
| 1278 | |
Ville Syrjälä | 56f5f70 | 2015-11-30 16:23:44 +0200 | [diff] [blame] | 1279 | if (HAS_PCH_LPT_H(dev_priv)) |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1280 | clock = MHz(135); /* LPT:H */ |
| 1281 | else |
| 1282 | clock = MHz(24); /* LPT:LP */ |
| 1283 | |
Ville Syrjälä | 37f2248 | 2016-03-02 17:22:18 +0200 | [diff] [blame] | 1284 | return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1285 | } |
| 1286 | |
| 1287 | /* |
| 1288 | * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH |
| 1289 | * display raw clocks multiplied by 128. |
| 1290 | */ |
| 1291 | static u32 pch_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) |
| 1292 | { |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1293 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1294 | |
Ville Syrjälä | 37f2248 | 2016-03-02 17:22:18 +0200 | [diff] [blame] | 1295 | return DIV_ROUND_CLOSEST(KHz(dev_priv->rawclk_freq), pwm_freq_hz * 128); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | /* |
| 1299 | * Gen2: This field determines the number of time base events (display core |
| 1300 | * clock frequency/32) in total for a complete cycle of modulated backlight |
| 1301 | * control. |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 1302 | * |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1303 | * Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock) |
| 1304 | * divided by 32. |
| 1305 | */ |
| 1306 | static u32 i9xx_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) |
| 1307 | { |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1308 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1309 | int clock; |
| 1310 | |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1311 | if (IS_PINEVIEW(dev_priv)) |
| 1312 | clock = KHz(dev_priv->rawclk_freq); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1313 | else |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1314 | clock = KHz(dev_priv->cdclk_freq); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1315 | |
Ville Syrjälä | 37f2248 | 2016-03-02 17:22:18 +0200 | [diff] [blame] | 1316 | return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 32); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1317 | } |
| 1318 | |
| 1319 | /* |
| 1320 | * Gen4: This value represents the period of the PWM stream in display core |
Ville Syrjälä | 83d8339 | 2015-11-30 16:23:43 +0200 | [diff] [blame] | 1321 | * clocks ([DevCTG] HRAW clocks) multiplied by 128. |
| 1322 | * |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1323 | */ |
| 1324 | static u32 i965_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) |
| 1325 | { |
| 1326 | struct drm_device *dev = connector->base.dev; |
| 1327 | struct drm_i915_private *dev_priv = dev->dev_private; |
Ville Syrjälä | 83d8339 | 2015-11-30 16:23:43 +0200 | [diff] [blame] | 1328 | int clock; |
| 1329 | |
| 1330 | if (IS_G4X(dev_priv)) |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1331 | clock = KHz(dev_priv->rawclk_freq); |
Ville Syrjälä | 83d8339 | 2015-11-30 16:23:43 +0200 | [diff] [blame] | 1332 | else |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1333 | clock = KHz(dev_priv->cdclk_freq); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1334 | |
Ville Syrjälä | 37f2248 | 2016-03-02 17:22:18 +0200 | [diff] [blame] | 1335 | return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 128); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1336 | } |
| 1337 | |
| 1338 | /* |
| 1339 | * VLV: This value represents the period of the PWM stream in display core |
| 1340 | * clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks |
| 1341 | * multiplied by 16. CHV uses a 19.2MHz S0IX clock. |
| 1342 | */ |
| 1343 | static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) |
| 1344 | { |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1345 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
| 1346 | int mul, clock; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1347 | |
| 1348 | if ((I915_READ(CBR1_VLV) & CBR_PWM_CLOCK_MUX_SELECT) == 0) { |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1349 | if (IS_CHERRYVIEW(dev_priv)) |
| 1350 | clock = KHz(19200); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1351 | else |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1352 | clock = MHz(25); |
| 1353 | mul = 16; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1354 | } else { |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1355 | clock = KHz(dev_priv->rawclk_freq); |
| 1356 | mul = 128; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1357 | } |
Ville Syrjälä | e7dc33f | 2016-03-02 17:22:13 +0200 | [diff] [blame] | 1358 | |
Ville Syrjälä | 37f2248 | 2016-03-02 17:22:18 +0200 | [diff] [blame] | 1359 | return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1360 | } |
| 1361 | |
| 1362 | static u32 get_backlight_max_vbt(struct intel_connector *connector) |
| 1363 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1364 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1365 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1366 | u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz; |
| 1367 | u32 pwm; |
| 1368 | |
Jani Nikula | 5075222 | 2015-12-01 10:23:51 +0200 | [diff] [blame] | 1369 | if (!panel->backlight.hz_to_pwm) { |
| 1370 | DRM_DEBUG_KMS("backlight frequency conversion not supported\n"); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1371 | return 0; |
| 1372 | } |
| 1373 | |
Jani Nikula | 5075222 | 2015-12-01 10:23:51 +0200 | [diff] [blame] | 1374 | if (pwm_freq_hz) { |
| 1375 | DRM_DEBUG_KMS("VBT defined backlight frequency %u Hz\n", |
| 1376 | pwm_freq_hz); |
| 1377 | } else { |
| 1378 | pwm_freq_hz = 200; |
| 1379 | DRM_DEBUG_KMS("default backlight frequency %u Hz\n", |
| 1380 | pwm_freq_hz); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1381 | } |
| 1382 | |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1383 | pwm = panel->backlight.hz_to_pwm(connector, pwm_freq_hz); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1384 | if (!pwm) { |
| 1385 | DRM_DEBUG_KMS("backlight frequency conversion failed\n"); |
| 1386 | return 0; |
| 1387 | } |
| 1388 | |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1389 | return pwm; |
| 1390 | } |
| 1391 | |
| 1392 | /* |
| 1393 | * Note: The setup hooks can't assume pipe is set! |
Jani Nikula | f91c15e | 2013-11-08 16:49:00 +0200 | [diff] [blame] | 1394 | */ |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1395 | static u32 get_backlight_min_vbt(struct intel_connector *connector) |
| 1396 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1397 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1398 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | e1c412e | 2014-11-05 14:46:31 +0200 | [diff] [blame] | 1399 | int min; |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1400 | |
| 1401 | WARN_ON(panel->backlight.max == 0); |
| 1402 | |
Jani Nikula | e1c412e | 2014-11-05 14:46:31 +0200 | [diff] [blame] | 1403 | /* |
| 1404 | * XXX: If the vbt value is 255, it makes min equal to max, which leads |
| 1405 | * to problems. There are such machines out there. Either our |
| 1406 | * interpretation is wrong or the vbt has bogus data. Or both. Safeguard |
| 1407 | * against this by letting the minimum be at most (arbitrarily chosen) |
| 1408 | * 25% of the max. |
| 1409 | */ |
| 1410 | min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64); |
| 1411 | if (min != dev_priv->vbt.backlight.min_brightness) { |
| 1412 | DRM_DEBUG_KMS("clamping VBT min backlight %d/255 to %d/255\n", |
| 1413 | dev_priv->vbt.backlight.min_brightness, min); |
| 1414 | } |
| 1415 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1416 | /* vbt value is a coefficient in range [0..255] */ |
Jani Nikula | e1c412e | 2014-11-05 14:46:31 +0200 | [diff] [blame] | 1417 | return scale(min, 0, 255, 0, panel->backlight.max); |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1418 | } |
| 1419 | |
Jani Nikula | 437b15b | 2015-09-04 16:55:13 +0300 | [diff] [blame] | 1420 | static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused) |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 1421 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1422 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 1423 | struct intel_panel *panel = &connector->panel; |
| 1424 | u32 pch_ctl1, pch_ctl2, val; |
| 1425 | |
| 1426 | pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); |
| 1427 | panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; |
| 1428 | |
| 1429 | pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2); |
| 1430 | panel->backlight.max = pch_ctl2 >> 16; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1431 | |
| 1432 | if (!panel->backlight.max) |
| 1433 | panel->backlight.max = get_backlight_max_vbt(connector); |
| 1434 | |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 1435 | if (!panel->backlight.max) |
| 1436 | return -ENODEV; |
| 1437 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1438 | panel->backlight.min = get_backlight_min_vbt(connector); |
| 1439 | |
Jani Nikula | 437b15b | 2015-09-04 16:55:13 +0300 | [diff] [blame] | 1440 | val = lpt_get_backlight(connector); |
Daniel Vetter | 96ab4c7 | 2013-11-14 15:17:41 +0100 | [diff] [blame] | 1441 | panel->backlight.level = intel_panel_compute_brightness(connector, val); |
| 1442 | |
| 1443 | panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) && |
| 1444 | panel->backlight.level != 0; |
| 1445 | |
| 1446 | return 0; |
| 1447 | } |
| 1448 | |
Ville Syrjälä | 6517d27 | 2014-11-07 11:16:02 +0200 | [diff] [blame] | 1449 | static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused) |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1450 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1451 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1452 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1453 | u32 cpu_ctl2, pch_ctl1, pch_ctl2, val; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1454 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1455 | pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); |
| 1456 | panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; |
| 1457 | |
| 1458 | pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2); |
| 1459 | panel->backlight.max = pch_ctl2 >> 16; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1460 | |
| 1461 | if (!panel->backlight.max) |
| 1462 | panel->backlight.max = get_backlight_max_vbt(connector); |
| 1463 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1464 | if (!panel->backlight.max) |
| 1465 | return -ENODEV; |
| 1466 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1467 | panel->backlight.min = get_backlight_min_vbt(connector); |
| 1468 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1469 | val = pch_get_backlight(connector); |
| 1470 | panel->backlight.level = intel_panel_compute_brightness(connector, val); |
| 1471 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1472 | cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2); |
| 1473 | panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && |
| 1474 | (pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0; |
| 1475 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1476 | return 0; |
| 1477 | } |
| 1478 | |
Ville Syrjälä | 6517d27 | 2014-11-07 11:16:02 +0200 | [diff] [blame] | 1479 | static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused) |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1480 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1481 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1482 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1483 | u32 ctl, val; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1484 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1485 | ctl = I915_READ(BLC_PWM_CTL); |
| 1486 | |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1487 | if (IS_GEN2(dev_priv) || IS_I915GM(dev_priv) || IS_I945GM(dev_priv)) |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1488 | panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; |
| 1489 | |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1490 | if (IS_PINEVIEW(dev_priv)) |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1491 | panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; |
| 1492 | |
| 1493 | panel->backlight.max = ctl >> 17; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1494 | |
| 1495 | if (!panel->backlight.max) { |
| 1496 | panel->backlight.max = get_backlight_max_vbt(connector); |
| 1497 | panel->backlight.max >>= 1; |
| 1498 | } |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1499 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1500 | if (!panel->backlight.max) |
| 1501 | return -ENODEV; |
| 1502 | |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1503 | if (panel->backlight.combination_mode) |
| 1504 | panel->backlight.max *= 0xff; |
| 1505 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1506 | panel->backlight.min = get_backlight_min_vbt(connector); |
| 1507 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1508 | val = i9xx_get_backlight(connector); |
| 1509 | panel->backlight.level = intel_panel_compute_brightness(connector, val); |
| 1510 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1511 | panel->backlight.enabled = panel->backlight.level != 0; |
| 1512 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1513 | return 0; |
| 1514 | } |
| 1515 | |
Ville Syrjälä | 6517d27 | 2014-11-07 11:16:02 +0200 | [diff] [blame] | 1516 | static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused) |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1517 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1518 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1519 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1520 | u32 ctl, ctl2, val; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1521 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1522 | ctl2 = I915_READ(BLC_PWM_CTL2); |
| 1523 | panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; |
| 1524 | panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; |
| 1525 | |
| 1526 | ctl = I915_READ(BLC_PWM_CTL); |
| 1527 | panel->backlight.max = ctl >> 16; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1528 | |
| 1529 | if (!panel->backlight.max) |
| 1530 | panel->backlight.max = get_backlight_max_vbt(connector); |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1531 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1532 | if (!panel->backlight.max) |
| 1533 | return -ENODEV; |
| 1534 | |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1535 | if (panel->backlight.combination_mode) |
| 1536 | panel->backlight.max *= 0xff; |
| 1537 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1538 | panel->backlight.min = get_backlight_min_vbt(connector); |
| 1539 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1540 | val = i9xx_get_backlight(connector); |
| 1541 | panel->backlight.level = intel_panel_compute_brightness(connector, val); |
| 1542 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1543 | panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) && |
| 1544 | panel->backlight.level != 0; |
| 1545 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1546 | return 0; |
| 1547 | } |
| 1548 | |
Ville Syrjälä | 6517d27 | 2014-11-07 11:16:02 +0200 | [diff] [blame] | 1549 | static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe) |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1550 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1551 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1552 | struct intel_panel *panel = &connector->panel; |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1553 | u32 ctl, ctl2, val; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1554 | |
Ville Syrjälä | 6517d27 | 2014-11-07 11:16:02 +0200 | [diff] [blame] | 1555 | if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B)) |
| 1556 | return -ENODEV; |
| 1557 | |
| 1558 | ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe)); |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1559 | panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; |
| 1560 | |
Ville Syrjälä | 6517d27 | 2014-11-07 11:16:02 +0200 | [diff] [blame] | 1561 | ctl = I915_READ(VLV_BLC_PWM_CTL(pipe)); |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1562 | panel->backlight.max = ctl >> 16; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1563 | |
| 1564 | if (!panel->backlight.max) |
| 1565 | panel->backlight.max = get_backlight_max_vbt(connector); |
| 1566 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1567 | if (!panel->backlight.max) |
| 1568 | return -ENODEV; |
| 1569 | |
Jani Nikula | 6dda730 | 2014-06-24 18:27:40 +0300 | [diff] [blame] | 1570 | panel->backlight.min = get_backlight_min_vbt(connector); |
| 1571 | |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1572 | val = _vlv_get_backlight(dev_priv, pipe); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1573 | panel->backlight.level = intel_panel_compute_brightness(connector, val); |
| 1574 | |
Jani Nikula | 636baeb | 2013-11-08 16:49:02 +0200 | [diff] [blame] | 1575 | panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) && |
| 1576 | panel->backlight.level != 0; |
| 1577 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1578 | return 0; |
| 1579 | } |
| 1580 | |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1581 | static int |
| 1582 | bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) |
| 1583 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1584 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1585 | struct intel_panel *panel = &connector->panel; |
| 1586 | u32 pwm_ctl, val; |
| 1587 | |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 1588 | /* |
| 1589 | * For BXT hard coding the Backlight controller to 0. |
| 1590 | * TODO : Read the controller value from VBT and generalize |
| 1591 | */ |
| 1592 | panel->backlight.controller = 0; |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1593 | |
Sunil Kamath | 022e4e5 | 2015-09-30 22:34:57 +0530 | [diff] [blame] | 1594 | pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller)); |
| 1595 | |
| 1596 | /* Keeping the check if controller 1 is to be programmed. |
| 1597 | * This will come into affect once the VBT parsing |
| 1598 | * is fixed for controller selection, and controller 1 is used |
| 1599 | * for a prticular display configuration. |
| 1600 | */ |
| 1601 | if (panel->backlight.controller == 1) { |
| 1602 | val = I915_READ(UTIL_PIN_CTL); |
| 1603 | panel->backlight.util_pin_active_low = |
| 1604 | val & UTIL_PIN_POLARITY; |
| 1605 | } |
| 1606 | |
| 1607 | panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; |
| 1608 | panel->backlight.max = |
| 1609 | I915_READ(BXT_BLC_PWM_FREQ(panel->backlight.controller)); |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1610 | |
| 1611 | if (!panel->backlight.max) |
| 1612 | panel->backlight.max = get_backlight_max_vbt(connector); |
| 1613 | |
Vandana Kannan | 0fb890c | 2015-05-05 14:51:56 +0530 | [diff] [blame] | 1614 | if (!panel->backlight.max) |
| 1615 | return -ENODEV; |
| 1616 | |
| 1617 | val = bxt_get_backlight(connector); |
| 1618 | panel->backlight.level = intel_panel_compute_brightness(connector, val); |
| 1619 | |
| 1620 | panel->backlight.enabled = (pwm_ctl & BXT_BLC_PWM_ENABLE) && |
| 1621 | panel->backlight.level != 0; |
| 1622 | |
| 1623 | return 0; |
| 1624 | } |
| 1625 | |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 1626 | static int pwm_setup_backlight(struct intel_connector *connector, |
| 1627 | enum pipe pipe) |
| 1628 | { |
| 1629 | struct drm_device *dev = connector->base.dev; |
| 1630 | struct intel_panel *panel = &connector->panel; |
| 1631 | int retval; |
| 1632 | |
| 1633 | /* Get the PWM chip for backlight control */ |
| 1634 | panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight"); |
| 1635 | if (IS_ERR(panel->backlight.pwm)) { |
| 1636 | DRM_ERROR("Failed to own the pwm chip\n"); |
| 1637 | panel->backlight.pwm = NULL; |
| 1638 | return -ENODEV; |
| 1639 | } |
| 1640 | |
| 1641 | retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS, |
| 1642 | CRC_PMIC_PWM_PERIOD_NS); |
| 1643 | if (retval < 0) { |
| 1644 | DRM_ERROR("Failed to configure the pwm chip\n"); |
| 1645 | pwm_put(panel->backlight.pwm); |
| 1646 | panel->backlight.pwm = NULL; |
| 1647 | return retval; |
| 1648 | } |
| 1649 | |
| 1650 | panel->backlight.min = 0; /* 0% */ |
| 1651 | panel->backlight.max = 100; /* 100% */ |
| 1652 | panel->backlight.level = DIV_ROUND_UP( |
| 1653 | pwm_get_duty_cycle(panel->backlight.pwm) * 100, |
| 1654 | CRC_PMIC_PWM_PERIOD_NS); |
| 1655 | panel->backlight.enabled = panel->backlight.level != 0; |
| 1656 | |
| 1657 | return 0; |
| 1658 | } |
| 1659 | |
Ville Syrjälä | 6517d27 | 2014-11-07 11:16:02 +0200 | [diff] [blame] | 1660 | int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe) |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1661 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1662 | struct drm_i915_private *dev_priv = to_i915(connector->dev); |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1663 | struct intel_connector *intel_connector = to_intel_connector(connector); |
Jani Nikula | 58c6877 | 2013-11-08 16:48:54 +0200 | [diff] [blame] | 1664 | struct intel_panel *panel = &intel_connector->panel; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1665 | int ret; |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1666 | |
Jani Nikula | c675949 | 2014-04-09 11:31:37 +0300 | [diff] [blame] | 1667 | if (!dev_priv->vbt.backlight.present) { |
Scot Doyle | 9c72cc6 | 2014-07-03 23:27:50 +0000 | [diff] [blame] | 1668 | if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) { |
| 1669 | DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n"); |
| 1670 | } else { |
| 1671 | DRM_DEBUG_KMS("no backlight present per VBT\n"); |
| 1672 | return 0; |
| 1673 | } |
Jani Nikula | c675949 | 2014-04-09 11:31:37 +0300 | [diff] [blame] | 1674 | } |
| 1675 | |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1676 | /* ensure intel_panel has been initialized first */ |
| 1677 | if (WARN_ON(!panel->backlight.setup)) |
| 1678 | return -ENODEV; |
| 1679 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1680 | /* set level and max in panel struct */ |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 1681 | mutex_lock(&dev_priv->backlight_lock); |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1682 | ret = panel->backlight.setup(intel_connector, pipe); |
Daniel Vetter | 07f11d4 | 2014-09-15 14:35:09 +0200 | [diff] [blame] | 1683 | mutex_unlock(&dev_priv->backlight_lock); |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1684 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1685 | if (ret) { |
| 1686 | DRM_DEBUG_KMS("failed to setup backlight for connector %s\n", |
Jani Nikula | c23cc41 | 2014-06-03 14:56:17 +0300 | [diff] [blame] | 1687 | connector->name); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1688 | return ret; |
| 1689 | } |
| 1690 | |
Jani Nikula | c91c9f3 | 2013-11-08 16:48:55 +0200 | [diff] [blame] | 1691 | panel->backlight.present = true; |
| 1692 | |
Ville Syrjälä | 0962c3c | 2014-11-07 15:19:46 +0200 | [diff] [blame] | 1693 | DRM_DEBUG_KMS("Connector %s backlight initialized, %s, brightness %u/%u\n", |
| 1694 | connector->name, |
Jani Nikula | c445b3b | 2013-11-08 16:49:01 +0200 | [diff] [blame] | 1695 | panel->backlight.enabled ? "enabled" : "disabled", |
Ville Syrjälä | 0962c3c | 2014-11-07 15:19:46 +0200 | [diff] [blame] | 1696 | panel->backlight.level, panel->backlight.max); |
Jani Nikula | c445b3b | 2013-11-08 16:49:01 +0200 | [diff] [blame] | 1697 | |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1698 | return 0; |
| 1699 | } |
| 1700 | |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1701 | void intel_panel_destroy_backlight(struct drm_connector *connector) |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1702 | { |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1703 | struct intel_connector *intel_connector = to_intel_connector(connector); |
Jani Nikula | c91c9f3 | 2013-11-08 16:48:55 +0200 | [diff] [blame] | 1704 | struct intel_panel *panel = &intel_connector->panel; |
Jani Nikula | db31af1d | 2013-11-08 16:48:53 +0200 | [diff] [blame] | 1705 | |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 1706 | /* dispose of the pwm */ |
| 1707 | if (panel->backlight.pwm) |
| 1708 | pwm_put(panel->backlight.pwm); |
| 1709 | |
Jani Nikula | c91c9f3 | 2013-11-08 16:48:55 +0200 | [diff] [blame] | 1710 | panel->backlight.present = false; |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 1711 | } |
Jani Nikula | 1d50870 | 2012-10-19 14:51:49 +0300 | [diff] [blame] | 1712 | |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1713 | /* Set up chip specific backlight functions */ |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1714 | static void |
| 1715 | intel_panel_init_backlight_funcs(struct intel_panel *panel) |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1716 | { |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1717 | struct intel_connector *connector = |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1718 | container_of(panel, struct intel_connector, panel); |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1719 | struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1720 | |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1721 | if (IS_BROXTON(dev_priv)) { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1722 | panel->backlight.setup = bxt_setup_backlight; |
| 1723 | panel->backlight.enable = bxt_enable_backlight; |
| 1724 | panel->backlight.disable = bxt_disable_backlight; |
| 1725 | panel->backlight.set = bxt_set_backlight; |
| 1726 | panel->backlight.get = bxt_get_backlight; |
Jani Nikula | 2dd6982 | 2015-12-01 10:23:50 +0200 | [diff] [blame] | 1727 | panel->backlight.hz_to_pwm = bxt_hz_to_pwm; |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1728 | } else if (HAS_PCH_LPT(dev_priv) || HAS_PCH_SPT(dev_priv)) { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1729 | panel->backlight.setup = lpt_setup_backlight; |
| 1730 | panel->backlight.enable = lpt_enable_backlight; |
| 1731 | panel->backlight.disable = lpt_disable_backlight; |
| 1732 | panel->backlight.set = lpt_set_backlight; |
| 1733 | panel->backlight.get = lpt_get_backlight; |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1734 | if (HAS_PCH_LPT(dev_priv)) |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1735 | panel->backlight.hz_to_pwm = lpt_hz_to_pwm; |
Jani Nikula | aa17cdb | 2015-09-04 16:55:14 +0300 | [diff] [blame] | 1736 | else |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1737 | panel->backlight.hz_to_pwm = spt_hz_to_pwm; |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1738 | } else if (HAS_PCH_SPLIT(dev_priv)) { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1739 | panel->backlight.setup = pch_setup_backlight; |
| 1740 | panel->backlight.enable = pch_enable_backlight; |
| 1741 | panel->backlight.disable = pch_disable_backlight; |
| 1742 | panel->backlight.set = pch_set_backlight; |
| 1743 | panel->backlight.get = pch_get_backlight; |
| 1744 | panel->backlight.hz_to_pwm = pch_hz_to_pwm; |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1745 | } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { |
Jani Nikula | 92c4565 | 2016-03-16 12:43:33 +0200 | [diff] [blame] | 1746 | if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1747 | panel->backlight.setup = pwm_setup_backlight; |
| 1748 | panel->backlight.enable = pwm_enable_backlight; |
| 1749 | panel->backlight.disable = pwm_disable_backlight; |
| 1750 | panel->backlight.set = pwm_set_backlight; |
| 1751 | panel->backlight.get = pwm_get_backlight; |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 1752 | } else { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1753 | panel->backlight.setup = vlv_setup_backlight; |
| 1754 | panel->backlight.enable = vlv_enable_backlight; |
| 1755 | panel->backlight.disable = vlv_disable_backlight; |
| 1756 | panel->backlight.set = vlv_set_backlight; |
| 1757 | panel->backlight.get = vlv_get_backlight; |
| 1758 | panel->backlight.hz_to_pwm = vlv_hz_to_pwm; |
Shobhit Kumar | b029e66 | 2015-06-26 14:32:10 +0530 | [diff] [blame] | 1759 | } |
Jani Nikula | e6cb372 | 2015-12-18 10:51:35 +0200 | [diff] [blame] | 1760 | } else if (IS_GEN4(dev_priv)) { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1761 | panel->backlight.setup = i965_setup_backlight; |
| 1762 | panel->backlight.enable = i965_enable_backlight; |
| 1763 | panel->backlight.disable = i965_disable_backlight; |
| 1764 | panel->backlight.set = i9xx_set_backlight; |
| 1765 | panel->backlight.get = i9xx_get_backlight; |
| 1766 | panel->backlight.hz_to_pwm = i965_hz_to_pwm; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1767 | } else { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1768 | panel->backlight.setup = i9xx_setup_backlight; |
| 1769 | panel->backlight.enable = i9xx_enable_backlight; |
| 1770 | panel->backlight.disable = i9xx_disable_backlight; |
| 1771 | panel->backlight.set = i9xx_set_backlight; |
| 1772 | panel->backlight.get = i9xx_get_backlight; |
| 1773 | panel->backlight.hz_to_pwm = i9xx_hz_to_pwm; |
Jani Nikula | 7bd688c | 2013-11-08 16:48:56 +0200 | [diff] [blame] | 1774 | } |
| 1775 | } |
| 1776 | |
Jani Nikula | dd06f90 | 2012-10-19 14:51:50 +0300 | [diff] [blame] | 1777 | int intel_panel_init(struct intel_panel *panel, |
Vandana Kannan | 4b6ed68 | 2014-02-11 14:26:36 +0530 | [diff] [blame] | 1778 | struct drm_display_mode *fixed_mode, |
| 1779 | struct drm_display_mode *downclock_mode) |
Jani Nikula | 1d50870 | 2012-10-19 14:51:49 +0300 | [diff] [blame] | 1780 | { |
Jani Nikula | 5507fae | 2015-09-14 14:03:48 +0300 | [diff] [blame] | 1781 | intel_panel_init_backlight_funcs(panel); |
| 1782 | |
Jani Nikula | dd06f90 | 2012-10-19 14:51:50 +0300 | [diff] [blame] | 1783 | panel->fixed_mode = fixed_mode; |
Vandana Kannan | 4b6ed68 | 2014-02-11 14:26:36 +0530 | [diff] [blame] | 1784 | panel->downclock_mode = downclock_mode; |
Jani Nikula | dd06f90 | 2012-10-19 14:51:50 +0300 | [diff] [blame] | 1785 | |
Jani Nikula | 1d50870 | 2012-10-19 14:51:49 +0300 | [diff] [blame] | 1786 | return 0; |
| 1787 | } |
| 1788 | |
| 1789 | void intel_panel_fini(struct intel_panel *panel) |
| 1790 | { |
Jani Nikula | dd06f90 | 2012-10-19 14:51:50 +0300 | [diff] [blame] | 1791 | struct intel_connector *intel_connector = |
| 1792 | container_of(panel, struct intel_connector, panel); |
| 1793 | |
| 1794 | if (panel->fixed_mode) |
| 1795 | drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode); |
Vandana Kannan | ec9ed19 | 2013-12-10 13:37:36 +0530 | [diff] [blame] | 1796 | |
| 1797 | if (panel->downclock_mode) |
| 1798 | drm_mode_destroy(intel_connector->base.dev, |
| 1799 | panel->downclock_mode); |
Jani Nikula | 1d50870 | 2012-10-19 14:51:49 +0300 | [diff] [blame] | 1800 | } |
Ville Syrjälä | 0962c3c | 2014-11-07 15:19:46 +0200 | [diff] [blame] | 1801 | |
| 1802 | void intel_backlight_register(struct drm_device *dev) |
| 1803 | { |
| 1804 | struct intel_connector *connector; |
| 1805 | |
Jani Nikula | 19c8054 | 2015-12-16 12:48:16 +0200 | [diff] [blame] | 1806 | for_each_intel_connector(dev, connector) |
Ville Syrjälä | 0962c3c | 2014-11-07 15:19:46 +0200 | [diff] [blame] | 1807 | intel_backlight_device_register(connector); |
| 1808 | } |
| 1809 | |
| 1810 | void intel_backlight_unregister(struct drm_device *dev) |
| 1811 | { |
| 1812 | struct intel_connector *connector; |
| 1813 | |
Jani Nikula | 19c8054 | 2015-12-16 12:48:16 +0200 | [diff] [blame] | 1814 | for_each_intel_connector(dev, connector) |
Ville Syrjälä | 0962c3c | 2014-11-07 15:19:46 +0200 | [diff] [blame] | 1815 | intel_backlight_device_unregister(connector); |
| 1816 | } |