| /* |
| * Copyright © 1997-2003 by The XFree86 Project, Inc. |
| * Copyright © 2007 Dave Airlie |
| * Copyright © 2007-2008 Intel Corporation |
| * Jesse Barnes <jesse.barnes@intel.com> |
| * Copyright 2005-2006 Luc Verhaegen |
| * Copyright (c) 2001, Andy Ritger aritger@nvidia.com |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Except as contained in this notice, the name of the copyright holder(s) |
| * and author(s) shall not be used in advertising or otherwise to promote |
| * the sale, use or other dealings in this Software without prior written |
| * authorization from the copyright holder(s) and author(s). |
| */ |
| |
| #include <linux/ctype.h> |
| #include <linux/export.h> |
| #include <linux/fb.h> /* for KHZ2PICOS() */ |
| #include <linux/list.h> |
| #include <linux/list_sort.h> |
| #include <linux/of.h> |
| |
| #include <video/of_display_timing.h> |
| #include <video/of_videomode.h> |
| #include <video/videomode.h> |
| |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_device.h> |
| #include <drm/drm_edid.h> |
| #include <drm/drm_modes.h> |
| #include <drm/drm_print.h> |
| |
| #include "drm_crtc_internal.h" |
| |
| /** |
| * drm_mode_debug_printmodeline - print a mode to dmesg |
| * @mode: mode to print |
| * |
| * Describe @mode using DRM_DEBUG. |
| */ |
| void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) |
| { |
| DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); |
| } |
| EXPORT_SYMBOL(drm_mode_debug_printmodeline); |
| |
| /** |
| * drm_mode_create - create a new display mode |
| * @dev: DRM device |
| * |
| * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it |
| * and return it. |
| * |
| * Returns: |
| * Pointer to new mode on success, NULL on error. |
| */ |
| struct drm_display_mode *drm_mode_create(struct drm_device *dev) |
| { |
| struct drm_display_mode *nmode; |
| |
| nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); |
| if (!nmode) |
| return NULL; |
| |
| return nmode; |
| } |
| EXPORT_SYMBOL(drm_mode_create); |
| |
| /** |
| * drm_mode_destroy - remove a mode |
| * @dev: DRM device |
| * @mode: mode to remove |
| * |
| * Release @mode's unique ID, then free it @mode structure itself using kfree. |
| */ |
| void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) |
| { |
| if (!mode) |
| return; |
| |
| kfree(mode); |
| } |
| EXPORT_SYMBOL(drm_mode_destroy); |
| |
| /** |
| * drm_mode_probed_add - add a mode to a connector's probed_mode list |
| * @connector: connector the new mode |
| * @mode: mode data |
| * |
| * Add @mode to @connector's probed_mode list for later use. This list should |
| * then in a second step get filtered and all the modes actually supported by |
| * the hardware moved to the @connector's modes list. |
| */ |
| void drm_mode_probed_add(struct drm_connector *connector, |
| struct drm_display_mode *mode) |
| { |
| WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); |
| |
| list_add_tail(&mode->head, &connector->probed_modes); |
| } |
| EXPORT_SYMBOL(drm_mode_probed_add); |
| |
| enum drm_mode_analog { |
| DRM_MODE_ANALOG_NTSC, /* 525 lines, 60Hz */ |
| DRM_MODE_ANALOG_PAL, /* 625 lines, 50Hz */ |
| }; |
| |
| /* |
| * The timings come from: |
| * - https://web.archive.org/web/20220406232708/http://www.kolumbus.fi/pami1/video/pal_ntsc.html |
| * - https://web.archive.org/web/20220406124914/http://martin.hinner.info/vga/pal.html |
| * - https://web.archive.org/web/20220609202433/http://www.batsocks.co.uk/readme/video_timing.htm |
| */ |
| #define NTSC_LINE_DURATION_NS 63556U |
| #define NTSC_LINES_NUMBER 525 |
| |
| #define NTSC_HBLK_DURATION_TYP_NS 10900U |
| #define NTSC_HBLK_DURATION_MIN_NS (NTSC_HBLK_DURATION_TYP_NS - 200) |
| #define NTSC_HBLK_DURATION_MAX_NS (NTSC_HBLK_DURATION_TYP_NS + 200) |
| |
| #define NTSC_HACT_DURATION_TYP_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_TYP_NS) |
| #define NTSC_HACT_DURATION_MIN_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_MAX_NS) |
| #define NTSC_HACT_DURATION_MAX_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_MIN_NS) |
| |
| #define NTSC_HFP_DURATION_TYP_NS 1500 |
| #define NTSC_HFP_DURATION_MIN_NS 1270 |
| #define NTSC_HFP_DURATION_MAX_NS 2220 |
| |
| #define NTSC_HSLEN_DURATION_TYP_NS 4700 |
| #define NTSC_HSLEN_DURATION_MIN_NS (NTSC_HSLEN_DURATION_TYP_NS - 100) |
| #define NTSC_HSLEN_DURATION_MAX_NS (NTSC_HSLEN_DURATION_TYP_NS + 100) |
| |
| #define NTSC_HBP_DURATION_TYP_NS 4700 |
| |
| /* |
| * I couldn't find the actual tolerance for the back porch, so let's |
| * just reuse the sync length ones. |
| */ |
| #define NTSC_HBP_DURATION_MIN_NS (NTSC_HBP_DURATION_TYP_NS - 100) |
| #define NTSC_HBP_DURATION_MAX_NS (NTSC_HBP_DURATION_TYP_NS + 100) |
| |
| #define PAL_LINE_DURATION_NS 64000U |
| #define PAL_LINES_NUMBER 625 |
| |
| #define PAL_HACT_DURATION_TYP_NS 51950U |
| #define PAL_HACT_DURATION_MIN_NS (PAL_HACT_DURATION_TYP_NS - 100) |
| #define PAL_HACT_DURATION_MAX_NS (PAL_HACT_DURATION_TYP_NS + 400) |
| |
| #define PAL_HBLK_DURATION_TYP_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_TYP_NS) |
| #define PAL_HBLK_DURATION_MIN_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_MAX_NS) |
| #define PAL_HBLK_DURATION_MAX_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_MIN_NS) |
| |
| #define PAL_HFP_DURATION_TYP_NS 1650 |
| #define PAL_HFP_DURATION_MIN_NS (PAL_HFP_DURATION_TYP_NS - 100) |
| #define PAL_HFP_DURATION_MAX_NS (PAL_HFP_DURATION_TYP_NS + 400) |
| |
| #define PAL_HSLEN_DURATION_TYP_NS 4700 |
| #define PAL_HSLEN_DURATION_MIN_NS (PAL_HSLEN_DURATION_TYP_NS - 200) |
| #define PAL_HSLEN_DURATION_MAX_NS (PAL_HSLEN_DURATION_TYP_NS + 200) |
| |
| #define PAL_HBP_DURATION_TYP_NS 5700 |
| #define PAL_HBP_DURATION_MIN_NS (PAL_HBP_DURATION_TYP_NS - 200) |
| #define PAL_HBP_DURATION_MAX_NS (PAL_HBP_DURATION_TYP_NS + 200) |
| |
| struct analog_param_field { |
| unsigned int even, odd; |
| }; |
| |
| #define PARAM_FIELD(_odd, _even) \ |
| { .even = _even, .odd = _odd } |
| |
| struct analog_param_range { |
| unsigned int min, typ, max; |
| }; |
| |
| #define PARAM_RANGE(_min, _typ, _max) \ |
| { .min = _min, .typ = _typ, .max = _max } |
| |
| struct analog_parameters { |
| unsigned int num_lines; |
| unsigned int line_duration_ns; |
| |
| struct analog_param_range hact_ns; |
| struct analog_param_range hfp_ns; |
| struct analog_param_range hslen_ns; |
| struct analog_param_range hbp_ns; |
| struct analog_param_range hblk_ns; |
| |
| unsigned int bt601_hfp; |
| |
| struct analog_param_field vfp_lines; |
| struct analog_param_field vslen_lines; |
| struct analog_param_field vbp_lines; |
| }; |
| |
| #define TV_MODE_PARAMETER(_mode, _lines, _line_dur, _hact, _hfp, \ |
| _hslen, _hbp, _hblk, _bt601_hfp, _vfp, \ |
| _vslen, _vbp) \ |
| [_mode] = { \ |
| .num_lines = _lines, \ |
| .line_duration_ns = _line_dur, \ |
| .hact_ns = _hact, \ |
| .hfp_ns = _hfp, \ |
| .hslen_ns = _hslen, \ |
| .hbp_ns = _hbp, \ |
| .hblk_ns = _hblk, \ |
| .bt601_hfp = _bt601_hfp, \ |
| .vfp_lines = _vfp, \ |
| .vslen_lines = _vslen, \ |
| .vbp_lines = _vbp, \ |
| } |
| |
| static const struct analog_parameters tv_modes_parameters[] = { |
| TV_MODE_PARAMETER(DRM_MODE_ANALOG_NTSC, |
| NTSC_LINES_NUMBER, |
| NTSC_LINE_DURATION_NS, |
| PARAM_RANGE(NTSC_HACT_DURATION_MIN_NS, |
| NTSC_HACT_DURATION_TYP_NS, |
| NTSC_HACT_DURATION_MAX_NS), |
| PARAM_RANGE(NTSC_HFP_DURATION_MIN_NS, |
| NTSC_HFP_DURATION_TYP_NS, |
| NTSC_HFP_DURATION_MAX_NS), |
| PARAM_RANGE(NTSC_HSLEN_DURATION_MIN_NS, |
| NTSC_HSLEN_DURATION_TYP_NS, |
| NTSC_HSLEN_DURATION_MAX_NS), |
| PARAM_RANGE(NTSC_HBP_DURATION_MIN_NS, |
| NTSC_HBP_DURATION_TYP_NS, |
| NTSC_HBP_DURATION_MAX_NS), |
| PARAM_RANGE(NTSC_HBLK_DURATION_MIN_NS, |
| NTSC_HBLK_DURATION_TYP_NS, |
| NTSC_HBLK_DURATION_MAX_NS), |
| 16, |
| PARAM_FIELD(3, 3), |
| PARAM_FIELD(3, 3), |
| PARAM_FIELD(16, 17)), |
| TV_MODE_PARAMETER(DRM_MODE_ANALOG_PAL, |
| PAL_LINES_NUMBER, |
| PAL_LINE_DURATION_NS, |
| PARAM_RANGE(PAL_HACT_DURATION_MIN_NS, |
| PAL_HACT_DURATION_TYP_NS, |
| PAL_HACT_DURATION_MAX_NS), |
| PARAM_RANGE(PAL_HFP_DURATION_MIN_NS, |
| PAL_HFP_DURATION_TYP_NS, |
| PAL_HFP_DURATION_MAX_NS), |
| PARAM_RANGE(PAL_HSLEN_DURATION_MIN_NS, |
| PAL_HSLEN_DURATION_TYP_NS, |
| PAL_HSLEN_DURATION_MAX_NS), |
| PARAM_RANGE(PAL_HBP_DURATION_MIN_NS, |
| PAL_HBP_DURATION_TYP_NS, |
| PAL_HBP_DURATION_MAX_NS), |
| PARAM_RANGE(PAL_HBLK_DURATION_MIN_NS, |
| PAL_HBLK_DURATION_TYP_NS, |
| PAL_HBLK_DURATION_MAX_NS), |
| 12, |
| |
| /* |
| * The front porch is actually 6 short sync |
| * pulses for the even field, and 5 for the |
| * odd field. Each sync takes half a life so |
| * the odd field front porch is shorter by |
| * half a line. |
| * |
| * In progressive, we're supposed to use 6 |
| * pulses, so we're fine there |
| */ |
| PARAM_FIELD(3, 2), |
| |
| /* |
| * The vsync length is 5 long sync pulses, |
| * each field taking half a line. We're |
| * shorter for both fields by half a line. |
| * |
| * In progressive, we're supposed to use 5 |
| * pulses, so we're off by half |
| * a line. |
| * |
| * In interlace, we're now off by half a line |
| * for the even field and one line for the odd |
| * field. |
| */ |
| PARAM_FIELD(3, 3), |
| |
| /* |
| * The back porch starts with post-equalizing |
| * pulses, consisting in 5 short sync pulses |
| * for the even field, 4 for the odd field. In |
| * progressive, it's 5 short syncs. |
| * |
| * In progressive, we thus have 2.5 lines, |
| * plus the 0.5 line we were missing |
| * previously, so we should use 3 lines. |
| * |
| * In interlace, the even field is in the |
| * exact same case than progressive. For the |
| * odd field, we should be using 2 lines but |
| * we're one line short, so we'll make up for |
| * it here by using 3. |
| * |
| * The entire blanking area is supposed to |
| * take 25 lines, so we also need to account |
| * for the rest of the blanking area that |
| * can't be in either the front porch or sync |
| * period. |
| */ |
| PARAM_FIELD(19, 20)), |
| }; |
| |
| static int fill_analog_mode(struct drm_device *dev, |
| struct drm_display_mode *mode, |
| const struct analog_parameters *params, |
| unsigned long pixel_clock_hz, |
| unsigned int hactive, |
| unsigned int vactive, |
| bool interlace) |
| { |
| unsigned long pixel_duration_ns = NSEC_PER_SEC / pixel_clock_hz; |
| unsigned int htotal, vtotal; |
| unsigned int max_hact, hact_duration_ns; |
| unsigned int hblk, hblk_duration_ns; |
| unsigned int hfp, hfp_duration_ns; |
| unsigned int hslen, hslen_duration_ns; |
| unsigned int hbp, hbp_duration_ns; |
| unsigned int porches, porches_duration_ns; |
| unsigned int vfp, vfp_min; |
| unsigned int vbp, vbp_min; |
| unsigned int vslen; |
| bool bt601 = false; |
| int porches_rem; |
| u64 result; |
| |
| drm_dbg_kms(dev, |
| "Generating a %ux%u%c, %u-line mode with a %lu kHz clock\n", |
| hactive, vactive, |
| interlace ? 'i' : 'p', |
| params->num_lines, |
| pixel_clock_hz / 1000); |
| |
| max_hact = params->hact_ns.max / pixel_duration_ns; |
| if (pixel_clock_hz == 13500000 && hactive > max_hact && hactive <= 720) { |
| drm_dbg_kms(dev, "Trying to generate a BT.601 mode. Disabling checks.\n"); |
| bt601 = true; |
| } |
| |
| /* |
| * Our pixel duration is going to be round down by the division, |
| * so rounding up is probably going to introduce even more |
| * deviation. |
| */ |
| result = (u64)params->line_duration_ns * pixel_clock_hz; |
| do_div(result, NSEC_PER_SEC); |
| htotal = result; |
| |
| drm_dbg_kms(dev, "Total Horizontal Number of Pixels: %u\n", htotal); |
| |
| hact_duration_ns = hactive * pixel_duration_ns; |
| if (!bt601 && |
| (hact_duration_ns < params->hact_ns.min || |
| hact_duration_ns > params->hact_ns.max)) { |
| drm_err(dev, "Invalid horizontal active area duration: %uns (min: %u, max %u)\n", |
| hact_duration_ns, params->hact_ns.min, params->hact_ns.max); |
| return -EINVAL; |
| } |
| |
| hblk = htotal - hactive; |
| drm_dbg_kms(dev, "Horizontal Blanking Period: %u\n", hblk); |
| |
| hblk_duration_ns = hblk * pixel_duration_ns; |
| if (!bt601 && |
| (hblk_duration_ns < params->hblk_ns.min || |
| hblk_duration_ns > params->hblk_ns.max)) { |
| drm_err(dev, "Invalid horizontal blanking duration: %uns (min: %u, max %u)\n", |
| hblk_duration_ns, params->hblk_ns.min, params->hblk_ns.max); |
| return -EINVAL; |
| } |
| |
| hslen = DIV_ROUND_UP(params->hslen_ns.typ, pixel_duration_ns); |
| drm_dbg_kms(dev, "Horizontal Sync Period: %u\n", hslen); |
| |
| hslen_duration_ns = hslen * pixel_duration_ns; |
| if (!bt601 && |
| (hslen_duration_ns < params->hslen_ns.min || |
| hslen_duration_ns > params->hslen_ns.max)) { |
| drm_err(dev, "Invalid horizontal sync duration: %uns (min: %u, max %u)\n", |
| hslen_duration_ns, params->hslen_ns.min, params->hslen_ns.max); |
| return -EINVAL; |
| } |
| |
| porches = hblk - hslen; |
| drm_dbg_kms(dev, "Remaining horizontal pixels for both porches: %u\n", porches); |
| |
| porches_duration_ns = porches * pixel_duration_ns; |
| if (!bt601 && |
| (porches_duration_ns > (params->hfp_ns.max + params->hbp_ns.max) || |
| porches_duration_ns < (params->hfp_ns.min + params->hbp_ns.min))) { |
| drm_err(dev, "Invalid horizontal porches duration: %uns\n", |
| porches_duration_ns); |
| return -EINVAL; |
| } |
| |
| if (bt601) { |
| hfp = params->bt601_hfp; |
| } else { |
| unsigned int hfp_min = DIV_ROUND_UP(params->hfp_ns.min, |
| pixel_duration_ns); |
| unsigned int hbp_min = DIV_ROUND_UP(params->hbp_ns.min, |
| pixel_duration_ns); |
| int porches_rem = porches - hfp_min - hbp_min; |
| |
| hfp = hfp_min + DIV_ROUND_UP(porches_rem, 2); |
| } |
| |
| drm_dbg_kms(dev, "Horizontal Front Porch: %u\n", hfp); |
| |
| hfp_duration_ns = hfp * pixel_duration_ns; |
| if (!bt601 && |
| (hfp_duration_ns < params->hfp_ns.min || |
| hfp_duration_ns > params->hfp_ns.max)) { |
| drm_err(dev, "Invalid horizontal front porch duration: %uns (min: %u, max %u)\n", |
| hfp_duration_ns, params->hfp_ns.min, params->hfp_ns.max); |
| return -EINVAL; |
| } |
| |
| hbp = porches - hfp; |
| drm_dbg_kms(dev, "Horizontal Back Porch: %u\n", hbp); |
| |
| hbp_duration_ns = hbp * pixel_duration_ns; |
| if (!bt601 && |
| (hbp_duration_ns < params->hbp_ns.min || |
| hbp_duration_ns > params->hbp_ns.max)) { |
| drm_err(dev, "Invalid horizontal back porch duration: %uns (min: %u, max %u)\n", |
| hbp_duration_ns, params->hbp_ns.min, params->hbp_ns.max); |
| return -EINVAL; |
| } |
| |
| if (htotal != (hactive + hfp + hslen + hbp)) |
| return -EINVAL; |
| |
| mode->clock = pixel_clock_hz / 1000; |
| mode->hdisplay = hactive; |
| mode->hsync_start = mode->hdisplay + hfp; |
| mode->hsync_end = mode->hsync_start + hslen; |
| mode->htotal = mode->hsync_end + hbp; |
| |
| if (interlace) { |
| vfp_min = params->vfp_lines.even + params->vfp_lines.odd; |
| vbp_min = params->vbp_lines.even + params->vbp_lines.odd; |
| vslen = params->vslen_lines.even + params->vslen_lines.odd; |
| } else { |
| /* |
| * By convention, NTSC (aka 525/60) systems start with |
| * the even field, but PAL (aka 625/50) systems start |
| * with the odd one. |
| * |
| * PAL systems also have asymmetric timings between the |
| * even and odd field, while NTSC is symmetric. |
| * |
| * Moreover, if we want to create a progressive mode for |
| * PAL, we need to use the odd field timings. |
| * |
| * Since odd == even for NTSC, we can just use the odd |
| * one all the time to simplify the code a bit. |
| */ |
| vfp_min = params->vfp_lines.odd; |
| vbp_min = params->vbp_lines.odd; |
| vslen = params->vslen_lines.odd; |
| } |
| |
| drm_dbg_kms(dev, "Vertical Sync Period: %u\n", vslen); |
| |
| porches = params->num_lines - vactive - vslen; |
| drm_dbg_kms(dev, "Remaining vertical pixels for both porches: %u\n", porches); |
| |
| porches_rem = porches - vfp_min - vbp_min; |
| vfp = vfp_min + (porches_rem / 2); |
| drm_dbg_kms(dev, "Vertical Front Porch: %u\n", vfp); |
| |
| vbp = porches - vfp; |
| drm_dbg_kms(dev, "Vertical Back Porch: %u\n", vbp); |
| |
| vtotal = vactive + vfp + vslen + vbp; |
| if (params->num_lines != vtotal) { |
| drm_err(dev, "Invalid vertical total: %upx (expected %upx)\n", |
| vtotal, params->num_lines); |
| return -EINVAL; |
| } |
| |
| mode->vdisplay = vactive; |
| mode->vsync_start = mode->vdisplay + vfp; |
| mode->vsync_end = mode->vsync_start + vslen; |
| mode->vtotal = mode->vsync_end + vbp; |
| |
| if (mode->vtotal != params->num_lines) |
| return -EINVAL; |
| |
| mode->type = DRM_MODE_TYPE_DRIVER; |
| mode->flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC; |
| if (interlace) |
| mode->flags |= DRM_MODE_FLAG_INTERLACE; |
| |
| drm_mode_set_name(mode); |
| |
| drm_dbg_kms(dev, "Generated mode " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); |
| |
| return 0; |
| } |
| |
| /** |
| * drm_analog_tv_mode - create a display mode for an analog TV |
| * @dev: drm device |
| * @tv_mode: TV Mode standard to create a mode for. See DRM_MODE_TV_MODE_*. |
| * @pixel_clock_hz: Pixel Clock Frequency, in Hertz |
| * @hdisplay: hdisplay size |
| * @vdisplay: vdisplay size |
| * @interlace: whether to compute an interlaced mode |
| * |
| * This function creates a struct drm_display_mode instance suited for |
| * an analog TV output, for one of the usual analog TV modes. Where |
| * this is DRM_MODE_TV_MODE_MONOCHROME, a 625-line mode will be created. |
| * |
| * Note that @hdisplay is larger than the usual constraints for the PAL |
| * and NTSC timings, and we'll choose to ignore most timings constraints |
| * to reach those resolutions. |
| * |
| * Returns: |
| * |
| * A pointer to the mode, allocated with drm_mode_create(). Returns NULL |
| * on error. |
| */ |
| struct drm_display_mode *drm_analog_tv_mode(struct drm_device *dev, |
| enum drm_connector_tv_mode tv_mode, |
| unsigned long pixel_clock_hz, |
| unsigned int hdisplay, |
| unsigned int vdisplay, |
| bool interlace) |
| { |
| struct drm_display_mode *mode; |
| enum drm_mode_analog analog; |
| int ret; |
| |
| switch (tv_mode) { |
| case DRM_MODE_TV_MODE_NTSC: |
| fallthrough; |
| case DRM_MODE_TV_MODE_NTSC_443: |
| fallthrough; |
| case DRM_MODE_TV_MODE_NTSC_J: |
| fallthrough; |
| case DRM_MODE_TV_MODE_PAL_M: |
| analog = DRM_MODE_ANALOG_NTSC; |
| break; |
| |
| case DRM_MODE_TV_MODE_PAL: |
| fallthrough; |
| case DRM_MODE_TV_MODE_PAL_N: |
| fallthrough; |
| case DRM_MODE_TV_MODE_SECAM: |
| fallthrough; |
| case DRM_MODE_TV_MODE_MONOCHROME: |
| analog = DRM_MODE_ANALOG_PAL; |
| break; |
| |
| default: |
| return NULL; |
| } |
| |
| mode = drm_mode_create(dev); |
| if (!mode) |
| return NULL; |
| |
| ret = fill_analog_mode(dev, mode, |
| &tv_modes_parameters[analog], |
| pixel_clock_hz, hdisplay, vdisplay, interlace); |
| if (ret) |
| goto err_free_mode; |
| |
| return mode; |
| |
| err_free_mode: |
| drm_mode_destroy(dev, mode); |
| return NULL; |
| } |
| EXPORT_SYMBOL(drm_analog_tv_mode); |
| |
| /** |
| * drm_cvt_mode -create a modeline based on the CVT algorithm |
| * @dev: drm device |
| * @hdisplay: hdisplay size |
| * @vdisplay: vdisplay size |
| * @vrefresh: vrefresh rate |
| * @reduced: whether to use reduced blanking |
| * @interlaced: whether to compute an interlaced mode |
| * @margins: whether to add margins (borders) |
| * |
| * This function is called to generate the modeline based on CVT algorithm |
| * according to the hdisplay, vdisplay, vrefresh. |
| * It is based from the VESA(TM) Coordinated Video Timing Generator by |
| * Graham Loveridge April 9, 2003 available at |
| * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls |
| * |
| * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. |
| * What I have done is to translate it by using integer calculation. |
| * |
| * Returns: |
| * The modeline based on the CVT algorithm stored in a drm_display_mode object. |
| * The display mode object is allocated with drm_mode_create(). Returns NULL |
| * when no mode could be allocated. |
| */ |
| struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, |
| int vdisplay, int vrefresh, |
| bool reduced, bool interlaced, bool margins) |
| { |
| #define HV_FACTOR 1000 |
| /* 1) top/bottom margin size (% of height) - default: 1.8, */ |
| #define CVT_MARGIN_PERCENTAGE 18 |
| /* 2) character cell horizontal granularity (pixels) - default 8 */ |
| #define CVT_H_GRANULARITY 8 |
| /* 3) Minimum vertical porch (lines) - default 3 */ |
| #define CVT_MIN_V_PORCH 3 |
| /* 4) Minimum number of vertical back porch lines - default 6 */ |
| #define CVT_MIN_V_BPORCH 6 |
| /* Pixel Clock step (kHz) */ |
| #define CVT_CLOCK_STEP 250 |
| struct drm_display_mode *drm_mode; |
| unsigned int vfieldrate, hperiod; |
| int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; |
| int interlace; |
| u64 tmp; |
| |
| if (!hdisplay || !vdisplay) |
| return NULL; |
| |
| /* allocate the drm_display_mode structure. If failure, we will |
| * return directly |
| */ |
| drm_mode = drm_mode_create(dev); |
| if (!drm_mode) |
| return NULL; |
| |
| /* the CVT default refresh rate is 60Hz */ |
| if (!vrefresh) |
| vrefresh = 60; |
| |
| /* the required field fresh rate */ |
| if (interlaced) |
| vfieldrate = vrefresh * 2; |
| else |
| vfieldrate = vrefresh; |
| |
| /* horizontal pixels */ |
| hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); |
| |
| /* determine the left&right borders */ |
| hmargin = 0; |
| if (margins) { |
| hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; |
| hmargin -= hmargin % CVT_H_GRANULARITY; |
| } |
| /* find the total active pixels */ |
| drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; |
| |
| /* find the number of lines per field */ |
| if (interlaced) |
| vdisplay_rnd = vdisplay / 2; |
| else |
| vdisplay_rnd = vdisplay; |
| |
| /* find the top & bottom borders */ |
| vmargin = 0; |
| if (margins) |
| vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; |
| |
| drm_mode->vdisplay = vdisplay + 2 * vmargin; |
| |
| /* Interlaced */ |
| if (interlaced) |
| interlace = 1; |
| else |
| interlace = 0; |
| |
| /* Determine VSync Width from aspect ratio */ |
| if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) |
| vsync = 4; |
| else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) |
| vsync = 5; |
| else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) |
| vsync = 6; |
| else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) |
| vsync = 7; |
| else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) |
| vsync = 7; |
| else /* custom */ |
| vsync = 10; |
| |
| if (!reduced) { |
| /* simplify the GTF calculation */ |
| /* 4) Minimum time of vertical sync + back porch interval (µs) |
| * default 550.0 |
| */ |
| int tmp1, tmp2; |
| #define CVT_MIN_VSYNC_BP 550 |
| /* 3) Nominal HSync width (% of line period) - default 8 */ |
| #define CVT_HSYNC_PERCENTAGE 8 |
| unsigned int hblank_percentage; |
| int vsyncandback_porch, __maybe_unused vback_porch, hblank; |
| |
| /* estimated the horizontal period */ |
| tmp1 = HV_FACTOR * 1000000 - |
| CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; |
| tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + |
| interlace; |
| hperiod = tmp1 * 2 / (tmp2 * vfieldrate); |
| |
| tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; |
| /* 9. Find number of lines in sync + backporch */ |
| if (tmp1 < (vsync + CVT_MIN_V_PORCH)) |
| vsyncandback_porch = vsync + CVT_MIN_V_PORCH; |
| else |
| vsyncandback_porch = tmp1; |
| /* 10. Find number of lines in back porch */ |
| vback_porch = vsyncandback_porch - vsync; |
| drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + |
| vsyncandback_porch + CVT_MIN_V_PORCH; |
| /* 5) Definition of Horizontal blanking time limitation */ |
| /* Gradient (%/kHz) - default 600 */ |
| #define CVT_M_FACTOR 600 |
| /* Offset (%) - default 40 */ |
| #define CVT_C_FACTOR 40 |
| /* Blanking time scaling factor - default 128 */ |
| #define CVT_K_FACTOR 128 |
| /* Scaling factor weighting - default 20 */ |
| #define CVT_J_FACTOR 20 |
| #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) |
| #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ |
| CVT_J_FACTOR) |
| /* 12. Find ideal blanking duty cycle from formula */ |
| hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * |
| hperiod / 1000; |
| /* 13. Blanking time */ |
| if (hblank_percentage < 20 * HV_FACTOR) |
| hblank_percentage = 20 * HV_FACTOR; |
| hblank = drm_mode->hdisplay * hblank_percentage / |
| (100 * HV_FACTOR - hblank_percentage); |
| hblank -= hblank % (2 * CVT_H_GRANULARITY); |
| /* 14. find the total pixels per line */ |
| drm_mode->htotal = drm_mode->hdisplay + hblank; |
| drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; |
| drm_mode->hsync_start = drm_mode->hsync_end - |
| (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; |
| drm_mode->hsync_start += CVT_H_GRANULARITY - |
| drm_mode->hsync_start % CVT_H_GRANULARITY; |
| /* fill the Vsync values */ |
| drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; |
| drm_mode->vsync_end = drm_mode->vsync_start + vsync; |
| } else { |
| /* Reduced blanking */ |
| /* Minimum vertical blanking interval time (µs)- default 460 */ |
| #define CVT_RB_MIN_VBLANK 460 |
| /* Fixed number of clocks for horizontal sync */ |
| #define CVT_RB_H_SYNC 32 |
| /* Fixed number of clocks for horizontal blanking */ |
| #define CVT_RB_H_BLANK 160 |
| /* Fixed number of lines for vertical front porch - default 3*/ |
| #define CVT_RB_VFPORCH 3 |
| int vbilines; |
| int tmp1, tmp2; |
| /* 8. Estimate Horizontal period. */ |
| tmp1 = HV_FACTOR * 1000000 - |
| CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; |
| tmp2 = vdisplay_rnd + 2 * vmargin; |
| hperiod = tmp1 / (tmp2 * vfieldrate); |
| /* 9. Find number of lines in vertical blanking */ |
| vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; |
| /* 10. Check if vertical blanking is sufficient */ |
| if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) |
| vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; |
| /* 11. Find total number of lines in vertical field */ |
| drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; |
| /* 12. Find total number of pixels in a line */ |
| drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; |
| /* Fill in HSync values */ |
| drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; |
| drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; |
| /* Fill in VSync values */ |
| drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; |
| drm_mode->vsync_end = drm_mode->vsync_start + vsync; |
| } |
| /* 15/13. Find pixel clock frequency (kHz for xf86) */ |
| tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */ |
| tmp *= HV_FACTOR * 1000; |
| do_div(tmp, hperiod); |
| tmp -= drm_mode->clock % CVT_CLOCK_STEP; |
| drm_mode->clock = tmp; |
| /* 18/16. Find actual vertical frame frequency */ |
| /* ignore - just set the mode flag for interlaced */ |
| if (interlaced) { |
| drm_mode->vtotal *= 2; |
| drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
| } |
| /* Fill the mode line name */ |
| drm_mode_set_name(drm_mode); |
| if (reduced) |
| drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | |
| DRM_MODE_FLAG_NVSYNC); |
| else |
| drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | |
| DRM_MODE_FLAG_NHSYNC); |
| |
| return drm_mode; |
| } |
| EXPORT_SYMBOL(drm_cvt_mode); |
| |
| /** |
| * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm |
| * @dev: drm device |
| * @hdisplay: hdisplay size |
| * @vdisplay: vdisplay size |
| * @vrefresh: vrefresh rate. |
| * @interlaced: whether to compute an interlaced mode |
| * @margins: desired margin (borders) size |
| * @GTF_M: extended GTF formula parameters |
| * @GTF_2C: extended GTF formula parameters |
| * @GTF_K: extended GTF formula parameters |
| * @GTF_2J: extended GTF formula parameters |
| * |
| * GTF feature blocks specify C and J in multiples of 0.5, so we pass them |
| * in here multiplied by two. For a C of 40, pass in 80. |
| * |
| * Returns: |
| * The modeline based on the full GTF algorithm stored in a drm_display_mode object. |
| * The display mode object is allocated with drm_mode_create(). Returns NULL |
| * when no mode could be allocated. |
| */ |
| struct drm_display_mode * |
| drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, |
| int vrefresh, bool interlaced, int margins, |
| int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) |
| { /* 1) top/bottom margin size (% of height) - default: 1.8, */ |
| #define GTF_MARGIN_PERCENTAGE 18 |
| /* 2) character cell horizontal granularity (pixels) - default 8 */ |
| #define GTF_CELL_GRAN 8 |
| /* 3) Minimum vertical porch (lines) - default 3 */ |
| #define GTF_MIN_V_PORCH 1 |
| /* width of vsync in lines */ |
| #define V_SYNC_RQD 3 |
| /* width of hsync as % of total line */ |
| #define H_SYNC_PERCENT 8 |
| /* min time of vsync + back porch (microsec) */ |
| #define MIN_VSYNC_PLUS_BP 550 |
| /* C' and M' are part of the Blanking Duty Cycle computation */ |
| #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) |
| #define GTF_M_PRIME (GTF_K * GTF_M / 256) |
| struct drm_display_mode *drm_mode; |
| unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; |
| int top_margin, bottom_margin; |
| int interlace; |
| unsigned int hfreq_est; |
| int vsync_plus_bp, __maybe_unused vback_porch; |
| unsigned int vtotal_lines, __maybe_unused vfieldrate_est; |
| unsigned int __maybe_unused hperiod; |
| unsigned int vfield_rate, __maybe_unused vframe_rate; |
| int left_margin, right_margin; |
| unsigned int total_active_pixels, ideal_duty_cycle; |
| unsigned int hblank, total_pixels, pixel_freq; |
| int hsync, hfront_porch, vodd_front_porch_lines; |
| unsigned int tmp1, tmp2; |
| |
| if (!hdisplay || !vdisplay) |
| return NULL; |
| |
| drm_mode = drm_mode_create(dev); |
| if (!drm_mode) |
| return NULL; |
| |
| /* 1. In order to give correct results, the number of horizontal |
| * pixels requested is first processed to ensure that it is divisible |
| * by the character size, by rounding it to the nearest character |
| * cell boundary: |
| */ |
| hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; |
| hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; |
| |
| /* 2. If interlace is requested, the number of vertical lines assumed |
| * by the calculation must be halved, as the computation calculates |
| * the number of vertical lines per field. |
| */ |
| if (interlaced) |
| vdisplay_rnd = vdisplay / 2; |
| else |
| vdisplay_rnd = vdisplay; |
| |
| /* 3. Find the frame rate required: */ |
| if (interlaced) |
| vfieldrate_rqd = vrefresh * 2; |
| else |
| vfieldrate_rqd = vrefresh; |
| |
| /* 4. Find number of lines in Top margin: */ |
| top_margin = 0; |
| if (margins) |
| top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / |
| 1000; |
| /* 5. Find number of lines in bottom margin: */ |
| bottom_margin = top_margin; |
| |
| /* 6. If interlace is required, then set variable interlace: */ |
| if (interlaced) |
| interlace = 1; |
| else |
| interlace = 0; |
| |
| /* 7. Estimate the Horizontal frequency */ |
| { |
| tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; |
| tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * |
| 2 + interlace; |
| hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; |
| } |
| |
| /* 8. Find the number of lines in V sync + back porch */ |
| /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ |
| vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; |
| vsync_plus_bp = (vsync_plus_bp + 500) / 1000; |
| /* 9. Find the number of lines in V back porch alone: */ |
| vback_porch = vsync_plus_bp - V_SYNC_RQD; |
| /* 10. Find the total number of lines in Vertical field period: */ |
| vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + |
| vsync_plus_bp + GTF_MIN_V_PORCH; |
| /* 11. Estimate the Vertical field frequency: */ |
| vfieldrate_est = hfreq_est / vtotal_lines; |
| /* 12. Find the actual horizontal period: */ |
| hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); |
| |
| /* 13. Find the actual Vertical field frequency: */ |
| vfield_rate = hfreq_est / vtotal_lines; |
| /* 14. Find the Vertical frame frequency: */ |
| if (interlaced) |
| vframe_rate = vfield_rate / 2; |
| else |
| vframe_rate = vfield_rate; |
| /* 15. Find number of pixels in left margin: */ |
| if (margins) |
| left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / |
| 1000; |
| else |
| left_margin = 0; |
| |
| /* 16.Find number of pixels in right margin: */ |
| right_margin = left_margin; |
| /* 17.Find total number of active pixels in image and left and right */ |
| total_active_pixels = hdisplay_rnd + left_margin + right_margin; |
| /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ |
| ideal_duty_cycle = GTF_C_PRIME * 1000 - |
| (GTF_M_PRIME * 1000000 / hfreq_est); |
| /* 19.Find the number of pixels in the blanking time to the nearest |
| * double character cell: */ |
| hblank = total_active_pixels * ideal_duty_cycle / |
| (100000 - ideal_duty_cycle); |
| hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); |
| hblank = hblank * 2 * GTF_CELL_GRAN; |
| /* 20.Find total number of pixels: */ |
| total_pixels = total_active_pixels + hblank; |
| /* 21.Find pixel clock frequency: */ |
| pixel_freq = total_pixels * hfreq_est / 1000; |
| /* Stage 1 computations are now complete; I should really pass |
| * the results to another function and do the Stage 2 computations, |
| * but I only need a few more values so I'll just append the |
| * computations here for now */ |
| /* 17. Find the number of pixels in the horizontal sync period: */ |
| hsync = H_SYNC_PERCENT * total_pixels / 100; |
| hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; |
| hsync = hsync * GTF_CELL_GRAN; |
| /* 18. Find the number of pixels in horizontal front porch period */ |
| hfront_porch = hblank / 2 - hsync; |
| /* 36. Find the number of lines in the odd front porch period: */ |
| vodd_front_porch_lines = GTF_MIN_V_PORCH ; |
| |
| /* finally, pack the results in the mode struct */ |
| drm_mode->hdisplay = hdisplay_rnd; |
| drm_mode->hsync_start = hdisplay_rnd + hfront_porch; |
| drm_mode->hsync_end = drm_mode->hsync_start + hsync; |
| drm_mode->htotal = total_pixels; |
| drm_mode->vdisplay = vdisplay_rnd; |
| drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; |
| drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; |
| drm_mode->vtotal = vtotal_lines; |
| |
| drm_mode->clock = pixel_freq; |
| |
| if (interlaced) { |
| drm_mode->vtotal *= 2; |
| drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
| } |
| |
| drm_mode_set_name(drm_mode); |
| if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) |
| drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; |
| else |
| drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; |
| |
| return drm_mode; |
| } |
| EXPORT_SYMBOL(drm_gtf_mode_complex); |
| |
| /** |
| * drm_gtf_mode - create the modeline based on the GTF algorithm |
| * @dev: drm device |
| * @hdisplay: hdisplay size |
| * @vdisplay: vdisplay size |
| * @vrefresh: vrefresh rate. |
| * @interlaced: whether to compute an interlaced mode |
| * @margins: desired margin (borders) size |
| * |
| * return the modeline based on GTF algorithm |
| * |
| * This function is to create the modeline based on the GTF algorithm. |
| * Generalized Timing Formula is derived from: |
| * |
| * GTF Spreadsheet by Andy Morrish (1/5/97) |
| * available at https://www.vesa.org |
| * |
| * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. |
| * What I have done is to translate it by using integer calculation. |
| * I also refer to the function of fb_get_mode in the file of |
| * drivers/video/fbmon.c |
| * |
| * Standard GTF parameters:: |
| * |
| * M = 600 |
| * C = 40 |
| * K = 128 |
| * J = 20 |
| * |
| * Returns: |
| * The modeline based on the GTF algorithm stored in a drm_display_mode object. |
| * The display mode object is allocated with drm_mode_create(). Returns NULL |
| * when no mode could be allocated. |
| */ |
| struct drm_display_mode * |
| drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, |
| bool interlaced, int margins) |
| { |
| return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, |
| interlaced, margins, |
| 600, 40 * 2, 128, 20 * 2); |
| } |
| EXPORT_SYMBOL(drm_gtf_mode); |
| |
| #ifdef CONFIG_VIDEOMODE_HELPERS |
| /** |
| * drm_display_mode_from_videomode - fill in @dmode using @vm, |
| * @vm: videomode structure to use as source |
| * @dmode: drm_display_mode structure to use as destination |
| * |
| * Fills out @dmode using the display mode specified in @vm. |
| */ |
| void drm_display_mode_from_videomode(const struct videomode *vm, |
| struct drm_display_mode *dmode) |
| { |
| dmode->hdisplay = vm->hactive; |
| dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; |
| dmode->hsync_end = dmode->hsync_start + vm->hsync_len; |
| dmode->htotal = dmode->hsync_end + vm->hback_porch; |
| |
| dmode->vdisplay = vm->vactive; |
| dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; |
| dmode->vsync_end = dmode->vsync_start + vm->vsync_len; |
| dmode->vtotal = dmode->vsync_end + vm->vback_porch; |
| |
| dmode->clock = vm->pixelclock / 1000; |
| |
| dmode->flags = 0; |
| if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) |
| dmode->flags |= DRM_MODE_FLAG_PHSYNC; |
| else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) |
| dmode->flags |= DRM_MODE_FLAG_NHSYNC; |
| if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) |
| dmode->flags |= DRM_MODE_FLAG_PVSYNC; |
| else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) |
| dmode->flags |= DRM_MODE_FLAG_NVSYNC; |
| if (vm->flags & DISPLAY_FLAGS_INTERLACED) |
| dmode->flags |= DRM_MODE_FLAG_INTERLACE; |
| if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) |
| dmode->flags |= DRM_MODE_FLAG_DBLSCAN; |
| if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) |
| dmode->flags |= DRM_MODE_FLAG_DBLCLK; |
| drm_mode_set_name(dmode); |
| } |
| EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); |
| |
| /** |
| * drm_display_mode_to_videomode - fill in @vm using @dmode, |
| * @dmode: drm_display_mode structure to use as source |
| * @vm: videomode structure to use as destination |
| * |
| * Fills out @vm using the display mode specified in @dmode. |
| */ |
| void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, |
| struct videomode *vm) |
| { |
| vm->hactive = dmode->hdisplay; |
| vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; |
| vm->hsync_len = dmode->hsync_end - dmode->hsync_start; |
| vm->hback_porch = dmode->htotal - dmode->hsync_end; |
| |
| vm->vactive = dmode->vdisplay; |
| vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; |
| vm->vsync_len = dmode->vsync_end - dmode->vsync_start; |
| vm->vback_porch = dmode->vtotal - dmode->vsync_end; |
| |
| vm->pixelclock = dmode->clock * 1000; |
| |
| vm->flags = 0; |
| if (dmode->flags & DRM_MODE_FLAG_PHSYNC) |
| vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; |
| else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) |
| vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; |
| if (dmode->flags & DRM_MODE_FLAG_PVSYNC) |
| vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; |
| else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) |
| vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; |
| if (dmode->flags & DRM_MODE_FLAG_INTERLACE) |
| vm->flags |= DISPLAY_FLAGS_INTERLACED; |
| if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) |
| vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; |
| if (dmode->flags & DRM_MODE_FLAG_DBLCLK) |
| vm->flags |= DISPLAY_FLAGS_DOUBLECLK; |
| } |
| EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); |
| |
| /** |
| * drm_bus_flags_from_videomode - extract information about pixelclk and |
| * DE polarity from videomode and store it in a separate variable |
| * @vm: videomode structure to use |
| * @bus_flags: information about pixelclk, sync and DE polarity will be stored |
| * here |
| * |
| * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE |
| * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS |
| * found in @vm |
| */ |
| void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) |
| { |
| *bus_flags = 0; |
| if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) |
| *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; |
| if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) |
| *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; |
| |
| if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) |
| *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE; |
| if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) |
| *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE; |
| |
| if (vm->flags & DISPLAY_FLAGS_DE_LOW) |
| *bus_flags |= DRM_BUS_FLAG_DE_LOW; |
| if (vm->flags & DISPLAY_FLAGS_DE_HIGH) |
| *bus_flags |= DRM_BUS_FLAG_DE_HIGH; |
| } |
| EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); |
| |
| #ifdef CONFIG_OF |
| /** |
| * of_get_drm_display_mode - get a drm_display_mode from devicetree |
| * @np: device_node with the timing specification |
| * @dmode: will be set to the return value |
| * @bus_flags: information about pixelclk, sync and DE polarity |
| * @index: index into the list of display timings in devicetree |
| * |
| * This function is expensive and should only be used, if only one mode is to be |
| * read from DT. To get multiple modes start with of_get_display_timings and |
| * work with that instead. |
| * |
| * Returns: |
| * 0 on success, a negative errno code when no of videomode node was found. |
| */ |
| int of_get_drm_display_mode(struct device_node *np, |
| struct drm_display_mode *dmode, u32 *bus_flags, |
| int index) |
| { |
| struct videomode vm; |
| int ret; |
| |
| ret = of_get_videomode(np, &vm, index); |
| if (ret) |
| return ret; |
| |
| drm_display_mode_from_videomode(&vm, dmode); |
| if (bus_flags) |
| drm_bus_flags_from_videomode(&vm, bus_flags); |
| |
| pr_debug("%pOF: got %dx%d display mode: " DRM_MODE_FMT "\n", |
| np, vm.hactive, vm.vactive, DRM_MODE_ARG(dmode)); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(of_get_drm_display_mode); |
| |
| /** |
| * of_get_drm_panel_display_mode - get a panel-timing drm_display_mode from devicetree |
| * @np: device_node with the panel-timing specification |
| * @dmode: will be set to the return value |
| * @bus_flags: information about pixelclk, sync and DE polarity |
| * |
| * The mandatory Device Tree properties width-mm and height-mm |
| * are read and set on the display mode. |
| * |
| * Returns: |
| * Zero on success, negative error code on failure. |
| */ |
| int of_get_drm_panel_display_mode(struct device_node *np, |
| struct drm_display_mode *dmode, u32 *bus_flags) |
| { |
| u32 width_mm = 0, height_mm = 0; |
| struct display_timing timing; |
| struct videomode vm; |
| int ret; |
| |
| ret = of_get_display_timing(np, "panel-timing", &timing); |
| if (ret) |
| return ret; |
| |
| videomode_from_timing(&timing, &vm); |
| |
| memset(dmode, 0, sizeof(*dmode)); |
| drm_display_mode_from_videomode(&vm, dmode); |
| if (bus_flags) |
| drm_bus_flags_from_videomode(&vm, bus_flags); |
| |
| ret = of_property_read_u32(np, "width-mm", &width_mm); |
| if (ret) |
| return ret; |
| |
| ret = of_property_read_u32(np, "height-mm", &height_mm); |
| if (ret) |
| return ret; |
| |
| dmode->width_mm = width_mm; |
| dmode->height_mm = height_mm; |
| |
| pr_debug(DRM_MODE_FMT "\n", DRM_MODE_ARG(dmode)); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(of_get_drm_panel_display_mode); |
| #endif /* CONFIG_OF */ |
| #endif /* CONFIG_VIDEOMODE_HELPERS */ |
| |
| /** |
| * drm_mode_set_name - set the name on a mode |
| * @mode: name will be set in this mode |
| * |
| * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> |
| * with an optional 'i' suffix for interlaced modes. |
| */ |
| void drm_mode_set_name(struct drm_display_mode *mode) |
| { |
| bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); |
| |
| snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", |
| mode->hdisplay, mode->vdisplay, |
| interlaced ? "i" : ""); |
| } |
| EXPORT_SYMBOL(drm_mode_set_name); |
| |
| /** |
| * drm_mode_vrefresh - get the vrefresh of a mode |
| * @mode: mode |
| * |
| * Returns: |
| * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the |
| * value first if it is not yet set. |
| */ |
| int drm_mode_vrefresh(const struct drm_display_mode *mode) |
| { |
| unsigned int num, den; |
| |
| if (mode->htotal == 0 || mode->vtotal == 0) |
| return 0; |
| |
| num = mode->clock; |
| den = mode->htotal * mode->vtotal; |
| |
| if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
| num *= 2; |
| if (mode->flags & DRM_MODE_FLAG_DBLSCAN) |
| den *= 2; |
| if (mode->vscan > 1) |
| den *= mode->vscan; |
| |
| return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(num, 1000), den); |
| } |
| EXPORT_SYMBOL(drm_mode_vrefresh); |
| |
| /** |
| * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode |
| * @mode: mode to query |
| * @hdisplay: hdisplay value to fill in |
| * @vdisplay: vdisplay value to fill in |
| * |
| * The vdisplay value will be doubled if the specified mode is a stereo mode of |
| * the appropriate layout. |
| */ |
| void drm_mode_get_hv_timing(const struct drm_display_mode *mode, |
| int *hdisplay, int *vdisplay) |
| { |
| struct drm_display_mode adjusted; |
| |
| drm_mode_init(&adjusted, mode); |
| |
| drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); |
| *hdisplay = adjusted.crtc_hdisplay; |
| *vdisplay = adjusted.crtc_vdisplay; |
| } |
| EXPORT_SYMBOL(drm_mode_get_hv_timing); |
| |
| /** |
| * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters |
| * @p: mode |
| * @adjust_flags: a combination of adjustment flags |
| * |
| * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. |
| * |
| * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of |
| * interlaced modes. |
| * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for |
| * buffers containing two eyes (only adjust the timings when needed, eg. for |
| * "frame packing" or "side by side full"). |
| * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* |
| * be performed for doublescan and vscan > 1 modes respectively. |
| */ |
| void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) |
| { |
| if (!p) |
| return; |
| |
| p->crtc_clock = p->clock; |
| p->crtc_hdisplay = p->hdisplay; |
| p->crtc_hsync_start = p->hsync_start; |
| p->crtc_hsync_end = p->hsync_end; |
| p->crtc_htotal = p->htotal; |
| p->crtc_hskew = p->hskew; |
| p->crtc_vdisplay = p->vdisplay; |
| p->crtc_vsync_start = p->vsync_start; |
| p->crtc_vsync_end = p->vsync_end; |
| p->crtc_vtotal = p->vtotal; |
| |
| if (p->flags & DRM_MODE_FLAG_INTERLACE) { |
| if (adjust_flags & CRTC_INTERLACE_HALVE_V) { |
| p->crtc_vdisplay /= 2; |
| p->crtc_vsync_start /= 2; |
| p->crtc_vsync_end /= 2; |
| p->crtc_vtotal /= 2; |
| } |
| } |
| |
| if (!(adjust_flags & CRTC_NO_DBLSCAN)) { |
| if (p->flags & DRM_MODE_FLAG_DBLSCAN) { |
| p->crtc_vdisplay *= 2; |
| p->crtc_vsync_start *= 2; |
| p->crtc_vsync_end *= 2; |
| p->crtc_vtotal *= 2; |
| } |
| } |
| |
| if (!(adjust_flags & CRTC_NO_VSCAN)) { |
| if (p->vscan > 1) { |
| p->crtc_vdisplay *= p->vscan; |
| p->crtc_vsync_start *= p->vscan; |
| p->crtc_vsync_end *= p->vscan; |
| p->crtc_vtotal *= p->vscan; |
| } |
| } |
| |
| if (adjust_flags & CRTC_STEREO_DOUBLE) { |
| unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; |
| |
| switch (layout) { |
| case DRM_MODE_FLAG_3D_FRAME_PACKING: |
| p->crtc_clock *= 2; |
| p->crtc_vdisplay += p->crtc_vtotal; |
| p->crtc_vsync_start += p->crtc_vtotal; |
| p->crtc_vsync_end += p->crtc_vtotal; |
| p->crtc_vtotal += p->crtc_vtotal; |
| break; |
| } |
| } |
| |
| p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); |
| p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); |
| p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); |
| p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); |
| } |
| EXPORT_SYMBOL(drm_mode_set_crtcinfo); |
| |
| /** |
| * drm_mode_copy - copy the mode |
| * @dst: mode to overwrite |
| * @src: mode to copy |
| * |
| * Copy an existing mode into another mode, preserving the |
| * list head of the destination mode. |
| */ |
| void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) |
| { |
| struct list_head head = dst->head; |
| |
| *dst = *src; |
| dst->head = head; |
| } |
| EXPORT_SYMBOL(drm_mode_copy); |
| |
| /** |
| * drm_mode_init - initialize the mode from another mode |
| * @dst: mode to overwrite |
| * @src: mode to copy |
| * |
| * Copy an existing mode into another mode, zeroing the |
| * list head of the destination mode. Typically used |
| * to guarantee the list head is not left with stack |
| * garbage in on-stack modes. |
| */ |
| void drm_mode_init(struct drm_display_mode *dst, const struct drm_display_mode *src) |
| { |
| memset(dst, 0, sizeof(*dst)); |
| drm_mode_copy(dst, src); |
| } |
| EXPORT_SYMBOL(drm_mode_init); |
| |
| /** |
| * drm_mode_duplicate - allocate and duplicate an existing mode |
| * @dev: drm_device to allocate the duplicated mode for |
| * @mode: mode to duplicate |
| * |
| * Just allocate a new mode, copy the existing mode into it, and return |
| * a pointer to it. Used to create new instances of established modes. |
| * |
| * Returns: |
| * Pointer to duplicated mode on success, NULL on error. |
| */ |
| struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, |
| const struct drm_display_mode *mode) |
| { |
| struct drm_display_mode *nmode; |
| |
| nmode = drm_mode_create(dev); |
| if (!nmode) |
| return NULL; |
| |
| drm_mode_copy(nmode, mode); |
| |
| return nmode; |
| } |
| EXPORT_SYMBOL(drm_mode_duplicate); |
| |
| static bool drm_mode_match_timings(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2) |
| { |
| return mode1->hdisplay == mode2->hdisplay && |
| mode1->hsync_start == mode2->hsync_start && |
| mode1->hsync_end == mode2->hsync_end && |
| mode1->htotal == mode2->htotal && |
| mode1->hskew == mode2->hskew && |
| mode1->vdisplay == mode2->vdisplay && |
| mode1->vsync_start == mode2->vsync_start && |
| mode1->vsync_end == mode2->vsync_end && |
| mode1->vtotal == mode2->vtotal && |
| mode1->vscan == mode2->vscan; |
| } |
| |
| static bool drm_mode_match_clock(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2) |
| { |
| /* |
| * do clock check convert to PICOS |
| * so fb modes get matched the same |
| */ |
| if (mode1->clock && mode2->clock) |
| return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); |
| else |
| return mode1->clock == mode2->clock; |
| } |
| |
| static bool drm_mode_match_flags(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2) |
| { |
| return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == |
| (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); |
| } |
| |
| static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2) |
| { |
| return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == |
| (mode2->flags & DRM_MODE_FLAG_3D_MASK); |
| } |
| |
| static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2) |
| { |
| return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; |
| } |
| |
| /** |
| * drm_mode_match - test modes for (partial) equality |
| * @mode1: first mode |
| * @mode2: second mode |
| * @match_flags: which parts need to match (DRM_MODE_MATCH_*) |
| * |
| * Check to see if @mode1 and @mode2 are equivalent. |
| * |
| * Returns: |
| * True if the modes are (partially) equal, false otherwise. |
| */ |
| bool drm_mode_match(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2, |
| unsigned int match_flags) |
| { |
| if (!mode1 && !mode2) |
| return true; |
| |
| if (!mode1 || !mode2) |
| return false; |
| |
| if (match_flags & DRM_MODE_MATCH_TIMINGS && |
| !drm_mode_match_timings(mode1, mode2)) |
| return false; |
| |
| if (match_flags & DRM_MODE_MATCH_CLOCK && |
| !drm_mode_match_clock(mode1, mode2)) |
| return false; |
| |
| if (match_flags & DRM_MODE_MATCH_FLAGS && |
| !drm_mode_match_flags(mode1, mode2)) |
| return false; |
| |
| if (match_flags & DRM_MODE_MATCH_3D_FLAGS && |
| !drm_mode_match_3d_flags(mode1, mode2)) |
| return false; |
| |
| if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && |
| !drm_mode_match_aspect_ratio(mode1, mode2)) |
| return false; |
| |
| return true; |
| } |
| EXPORT_SYMBOL(drm_mode_match); |
| |
| /** |
| * drm_mode_equal - test modes for equality |
| * @mode1: first mode |
| * @mode2: second mode |
| * |
| * Check to see if @mode1 and @mode2 are equivalent. |
| * |
| * Returns: |
| * True if the modes are equal, false otherwise. |
| */ |
| bool drm_mode_equal(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2) |
| { |
| return drm_mode_match(mode1, mode2, |
| DRM_MODE_MATCH_TIMINGS | |
| DRM_MODE_MATCH_CLOCK | |
| DRM_MODE_MATCH_FLAGS | |
| DRM_MODE_MATCH_3D_FLAGS| |
| DRM_MODE_MATCH_ASPECT_RATIO); |
| } |
| EXPORT_SYMBOL(drm_mode_equal); |
| |
| /** |
| * drm_mode_equal_no_clocks - test modes for equality |
| * @mode1: first mode |
| * @mode2: second mode |
| * |
| * Check to see if @mode1 and @mode2 are equivalent, but |
| * don't check the pixel clocks. |
| * |
| * Returns: |
| * True if the modes are equal, false otherwise. |
| */ |
| bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2) |
| { |
| return drm_mode_match(mode1, mode2, |
| DRM_MODE_MATCH_TIMINGS | |
| DRM_MODE_MATCH_FLAGS | |
| DRM_MODE_MATCH_3D_FLAGS); |
| } |
| EXPORT_SYMBOL(drm_mode_equal_no_clocks); |
| |
| /** |
| * drm_mode_equal_no_clocks_no_stereo - test modes for equality |
| * @mode1: first mode |
| * @mode2: second mode |
| * |
| * Check to see if @mode1 and @mode2 are equivalent, but |
| * don't check the pixel clocks nor the stereo layout. |
| * |
| * Returns: |
| * True if the modes are equal, false otherwise. |
| */ |
| bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, |
| const struct drm_display_mode *mode2) |
| { |
| return drm_mode_match(mode1, mode2, |
| DRM_MODE_MATCH_TIMINGS | |
| DRM_MODE_MATCH_FLAGS); |
| } |
| EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); |
| |
| static enum drm_mode_status |
| drm_mode_validate_basic(const struct drm_display_mode *mode) |
| { |
| if (mode->type & ~DRM_MODE_TYPE_ALL) |
| return MODE_BAD; |
| |
| if (mode->flags & ~DRM_MODE_FLAG_ALL) |
| return MODE_BAD; |
| |
| if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) |
| return MODE_BAD; |
| |
| if (mode->clock == 0) |
| return MODE_CLOCK_LOW; |
| |
| if (mode->hdisplay == 0 || |
| mode->hsync_start < mode->hdisplay || |
| mode->hsync_end < mode->hsync_start || |
| mode->htotal < mode->hsync_end) |
| return MODE_H_ILLEGAL; |
| |
| if (mode->vdisplay == 0 || |
| mode->vsync_start < mode->vdisplay || |
| mode->vsync_end < mode->vsync_start || |
| mode->vtotal < mode->vsync_end) |
| return MODE_V_ILLEGAL; |
| |
| return MODE_OK; |
| } |
| |
| /** |
| * drm_mode_validate_driver - make sure the mode is somewhat sane |
| * @dev: drm device |
| * @mode: mode to check |
| * |
| * First do basic validation on the mode, and then allow the driver |
| * to check for device/driver specific limitations via the optional |
| * &drm_mode_config_helper_funcs.mode_valid hook. |
| * |
| * Returns: |
| * The mode status |
| */ |
| enum drm_mode_status |
| drm_mode_validate_driver(struct drm_device *dev, |
| const struct drm_display_mode *mode) |
| { |
| enum drm_mode_status status; |
| |
| status = drm_mode_validate_basic(mode); |
| if (status != MODE_OK) |
| return status; |
| |
| if (dev->mode_config.funcs->mode_valid) |
| return dev->mode_config.funcs->mode_valid(dev, mode); |
| else |
| return MODE_OK; |
| } |
| EXPORT_SYMBOL(drm_mode_validate_driver); |
| |
| /** |
| * drm_mode_validate_size - make sure modes adhere to size constraints |
| * @mode: mode to check |
| * @maxX: maximum width |
| * @maxY: maximum height |
| * |
| * This function is a helper which can be used to validate modes against size |
| * limitations of the DRM device/connector. If a mode is too big its status |
| * member is updated with the appropriate validation failure code. The list |
| * itself is not changed. |
| * |
| * Returns: |
| * The mode status |
| */ |
| enum drm_mode_status |
| drm_mode_validate_size(const struct drm_display_mode *mode, |
| int maxX, int maxY) |
| { |
| if (maxX > 0 && mode->hdisplay > maxX) |
| return MODE_VIRTUAL_X; |
| |
| if (maxY > 0 && mode->vdisplay > maxY) |
| return MODE_VIRTUAL_Y; |
| |
| return MODE_OK; |
| } |
| EXPORT_SYMBOL(drm_mode_validate_size); |
| |
| /** |
| * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed |
| * @mode: mode to check |
| * @connector: drm connector under action |
| * |
| * This function is a helper which can be used to filter out any YCBCR420 |
| * only mode, when the source doesn't support it. |
| * |
| * Returns: |
| * The mode status |
| */ |
| enum drm_mode_status |
| drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, |
| struct drm_connector *connector) |
| { |
| if (!connector->ycbcr_420_allowed && |
| drm_mode_is_420_only(&connector->display_info, mode)) |
| return MODE_NO_420; |
| |
| return MODE_OK; |
| } |
| EXPORT_SYMBOL(drm_mode_validate_ycbcr420); |
| |
| #define MODE_STATUS(status) [MODE_ ## status + 3] = #status |
| |
| static const char * const drm_mode_status_names[] = { |
| MODE_STATUS(OK), |
| MODE_STATUS(HSYNC), |
| MODE_STATUS(VSYNC), |
| MODE_STATUS(H_ILLEGAL), |
| MODE_STATUS(V_ILLEGAL), |
| MODE_STATUS(BAD_WIDTH), |
| MODE_STATUS(NOMODE), |
| MODE_STATUS(NO_INTERLACE), |
| MODE_STATUS(NO_DBLESCAN), |
| MODE_STATUS(NO_VSCAN), |
| MODE_STATUS(MEM), |
| MODE_STATUS(VIRTUAL_X), |
| MODE_STATUS(VIRTUAL_Y), |
| MODE_STATUS(MEM_VIRT), |
| MODE_STATUS(NOCLOCK), |
| MODE_STATUS(CLOCK_HIGH), |
| MODE_STATUS(CLOCK_LOW), |
| MODE_STATUS(CLOCK_RANGE), |
| MODE_STATUS(BAD_HVALUE), |
| MODE_STATUS(BAD_VVALUE), |
| MODE_STATUS(BAD_VSCAN), |
| MODE_STATUS(HSYNC_NARROW), |
| MODE_STATUS(HSYNC_WIDE), |
| MODE_STATUS(HBLANK_NARROW), |
| MODE_STATUS(HBLANK_WIDE), |
| MODE_STATUS(VSYNC_NARROW), |
| MODE_STATUS(VSYNC_WIDE), |
| MODE_STATUS(VBLANK_NARROW), |
| MODE_STATUS(VBLANK_WIDE), |
| MODE_STATUS(PANEL), |
| MODE_STATUS(INTERLACE_WIDTH), |
| MODE_STATUS(ONE_WIDTH), |
| MODE_STATUS(ONE_HEIGHT), |
| MODE_STATUS(ONE_SIZE), |
| MODE_STATUS(NO_REDUCED), |
| MODE_STATUS(NO_STEREO), |
| MODE_STATUS(NO_420), |
| MODE_STATUS(STALE), |
| MODE_STATUS(BAD), |
| MODE_STATUS(ERROR), |
| }; |
| |
| #undef MODE_STATUS |
| |
| const char *drm_get_mode_status_name(enum drm_mode_status status) |
| { |
| int index = status + 3; |
| |
| if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) |
| return ""; |
| |
| return drm_mode_status_names[index]; |
| } |
| |
| /** |
| * drm_mode_prune_invalid - remove invalid modes from mode list |
| * @dev: DRM device |
| * @mode_list: list of modes to check |
| * @verbose: be verbose about it |
| * |
| * This helper function can be used to prune a display mode list after |
| * validation has been completed. All modes whose status is not MODE_OK will be |
| * removed from the list, and if @verbose the status code and mode name is also |
| * printed to dmesg. |
| */ |
| void drm_mode_prune_invalid(struct drm_device *dev, |
| struct list_head *mode_list, bool verbose) |
| { |
| struct drm_display_mode *mode, *t; |
| |
| list_for_each_entry_safe(mode, t, mode_list, head) { |
| if (mode->status != MODE_OK) { |
| list_del(&mode->head); |
| if (mode->type & DRM_MODE_TYPE_USERDEF) { |
| drm_warn(dev, "User-defined mode not supported: " |
| DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); |
| } |
| if (verbose) { |
| drm_dbg_kms(dev, "Rejected mode: " DRM_MODE_FMT " (%s)\n", |
| DRM_MODE_ARG(mode), drm_get_mode_status_name(mode->status)); |
| } |
| drm_mode_destroy(dev, mode); |
| } |
| } |
| } |
| EXPORT_SYMBOL(drm_mode_prune_invalid); |
| |
| /** |
| * drm_mode_compare - compare modes for favorability |
| * @priv: unused |
| * @lh_a: list_head for first mode |
| * @lh_b: list_head for second mode |
| * |
| * Compare two modes, given by @lh_a and @lh_b, returning a value indicating |
| * which is better. |
| * |
| * Returns: |
| * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or |
| * positive if @lh_b is better than @lh_a. |
| */ |
| static int drm_mode_compare(void *priv, const struct list_head *lh_a, |
| const struct list_head *lh_b) |
| { |
| struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); |
| struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); |
| int diff; |
| |
| diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - |
| ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); |
| if (diff) |
| return diff; |
| diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; |
| if (diff) |
| return diff; |
| |
| diff = drm_mode_vrefresh(b) - drm_mode_vrefresh(a); |
| if (diff) |
| return diff; |
| |
| diff = b->clock - a->clock; |
| return diff; |
| } |
| |
| /** |
| * drm_mode_sort - sort mode list |
| * @mode_list: list of drm_display_mode structures to sort |
| * |
| * Sort @mode_list by favorability, moving good modes to the head of the list. |
| */ |
| void drm_mode_sort(struct list_head *mode_list) |
| { |
| list_sort(NULL, mode_list, drm_mode_compare); |
| } |
| EXPORT_SYMBOL(drm_mode_sort); |
| |
| /** |
| * drm_connector_list_update - update the mode list for the connector |
| * @connector: the connector to update |
| * |
| * This moves the modes from the @connector probed_modes list |
| * to the actual mode list. It compares the probed mode against the current |
| * list and only adds different/new modes. |
| * |
| * This is just a helper functions doesn't validate any modes itself and also |
| * doesn't prune any invalid modes. Callers need to do that themselves. |
| */ |
| void drm_connector_list_update(struct drm_connector *connector) |
| { |
| struct drm_display_mode *pmode, *pt; |
| |
| WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); |
| |
| list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { |
| struct drm_display_mode *mode; |
| bool found_it = false; |
| |
| /* go through current modes checking for the new probed mode */ |
| list_for_each_entry(mode, &connector->modes, head) { |
| if (!drm_mode_equal(pmode, mode)) |
| continue; |
| |
| found_it = true; |
| |
| /* |
| * If the old matching mode is stale (ie. left over |
| * from a previous probe) just replace it outright. |
| * Otherwise just merge the type bits between all |
| * equal probed modes. |
| * |
| * If two probed modes are considered equal, pick the |
| * actual timings from the one that's marked as |
| * preferred (in case the match isn't 100%). If |
| * multiple or zero preferred modes are present, favor |
| * the mode added to the probed_modes list first. |
| */ |
| if (mode->status == MODE_STALE) { |
| drm_mode_copy(mode, pmode); |
| } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && |
| (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { |
| pmode->type |= mode->type; |
| drm_mode_copy(mode, pmode); |
| } else { |
| mode->type |= pmode->type; |
| } |
| |
| list_del(&pmode->head); |
| drm_mode_destroy(connector->dev, pmode); |
| break; |
| } |
| |
| if (!found_it) { |
| list_move_tail(&pmode->head, &connector->modes); |
| } |
| } |
| } |
| EXPORT_SYMBOL(drm_connector_list_update); |
| |
| static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, |
| struct drm_cmdline_mode *mode) |
| { |
| unsigned int bpp; |
| |
| if (str[0] != '-') |
| return -EINVAL; |
| |
| str++; |
| bpp = simple_strtol(str, end_ptr, 10); |
| if (*end_ptr == str) |
| return -EINVAL; |
| |
| mode->bpp = bpp; |
| mode->bpp_specified = true; |
| |
| return 0; |
| } |
| |
| static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, |
| struct drm_cmdline_mode *mode) |
| { |
| unsigned int refresh; |
| |
| if (str[0] != '@') |
| return -EINVAL; |
| |
| str++; |
| refresh = simple_strtol(str, end_ptr, 10); |
| if (*end_ptr == str) |
| return -EINVAL; |
| |
| mode->refresh = refresh; |
| mode->refresh_specified = true; |
| |
| return 0; |
| } |
| |
| static int drm_mode_parse_cmdline_extra(const char *str, int length, |
| bool freestanding, |
| const struct drm_connector *connector, |
| struct drm_cmdline_mode *mode) |
| { |
| int i; |
| |
| for (i = 0; i < length; i++) { |
| switch (str[i]) { |
| case 'i': |
| if (freestanding) |
| return -EINVAL; |
| |
| mode->interlace = true; |
| break; |
| case 'm': |
| if (freestanding) |
| return -EINVAL; |
| |
| mode->margins = true; |
| break; |
| case 'D': |
| if (mode->force != DRM_FORCE_UNSPECIFIED) |
| return -EINVAL; |
| |
| if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && |
| (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) |
| mode->force = DRM_FORCE_ON; |
| else |
| mode->force = DRM_FORCE_ON_DIGITAL; |
| break; |
| case 'd': |
| if (mode->force != DRM_FORCE_UNSPECIFIED) |
| return -EINVAL; |
| |
| mode->force = DRM_FORCE_OFF; |
| break; |
| case 'e': |
| if (mode->force != DRM_FORCE_UNSPECIFIED) |
| return -EINVAL; |
| |
| mode->force = DRM_FORCE_ON; |
| break; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, |
| bool extras, |
| const struct drm_connector *connector, |
| struct drm_cmdline_mode *mode) |
| { |
| const char *str_start = str; |
| bool rb = false, cvt = false; |
| int xres = 0, yres = 0; |
| int remaining, i; |
| char *end_ptr; |
| |
| xres = simple_strtol(str, &end_ptr, 10); |
| if (end_ptr == str) |
| return -EINVAL; |
| |
| if (end_ptr[0] != 'x') |
| return -EINVAL; |
| end_ptr++; |
| |
| str = end_ptr; |
| yres = simple_strtol(str, &end_ptr, 10); |
| if (end_ptr == str) |
| return -EINVAL; |
| |
| remaining = length - (end_ptr - str_start); |
| if (remaining < 0) |
| return -EINVAL; |
| |
| for (i = 0; i < remaining; i++) { |
| switch (end_ptr[i]) { |
| case 'M': |
| cvt = true; |
| break; |
| case 'R': |
| rb = true; |
| break; |
| default: |
| /* |
| * Try to pass that to our extras parsing |
| * function to handle the case where the |
| * extras are directly after the resolution |
| */ |
| if (extras) { |
| int ret = drm_mode_parse_cmdline_extra(end_ptr + i, |
| 1, |
| false, |
| connector, |
| mode); |
| if (ret) |
| return ret; |
| } else { |
| return -EINVAL; |
| } |
| } |
| } |
| |
| mode->xres = xres; |
| mode->yres = yres; |
| mode->cvt = cvt; |
| mode->rb = rb; |
| |
| return 0; |
| } |
| |
| static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret) |
| { |
| const char *value; |
| char *endp; |
| |
| /* |
| * delim must point to the '=', otherwise it is a syntax error and |
| * if delim points to the terminating zero, then delim + 1 will point |
| * past the end of the string. |
| */ |
| if (*delim != '=') |
| return -EINVAL; |
| |
| value = delim + 1; |
| *int_ret = simple_strtol(value, &endp, 10); |
| |
| /* Make sure we have parsed something */ |
| if (endp == value) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int drm_mode_parse_panel_orientation(const char *delim, |
| struct drm_cmdline_mode *mode) |
| { |
| const char *value; |
| |
| if (*delim != '=') |
| return -EINVAL; |
| |
| value = delim + 1; |
| delim = strchr(value, ','); |
| if (!delim) |
| delim = value + strlen(value); |
| |
| if (!strncmp(value, "normal", delim - value)) |
| mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; |
| else if (!strncmp(value, "upside_down", delim - value)) |
| mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; |
| else if (!strncmp(value, "left_side_up", delim - value)) |
| mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; |
| else if (!strncmp(value, "right_side_up", delim - value)) |
| mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; |
| else |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int drm_mode_parse_tv_mode(const char *delim, |
| struct drm_cmdline_mode *mode) |
| { |
| const char *value; |
| int ret; |
| |
| if (*delim != '=') |
| return -EINVAL; |
| |
| value = delim + 1; |
| delim = strchr(value, ','); |
| if (!delim) |
| delim = value + strlen(value); |
| |
| ret = drm_get_tv_mode_from_name(value, delim - value); |
| if (ret < 0) |
| return ret; |
| |
| mode->tv_mode_specified = true; |
| mode->tv_mode = ret; |
| |
| return 0; |
| } |
| |
| static int drm_mode_parse_cmdline_options(const char *str, |
| bool freestanding, |
| const struct drm_connector *connector, |
| struct drm_cmdline_mode *mode) |
| { |
| unsigned int deg, margin, rotation = 0; |
| const char *delim, *option, *sep; |
| |
| option = str; |
| do { |
| delim = strchr(option, '='); |
| if (!delim) { |
| delim = strchr(option, ','); |
| |
| if (!delim) |
| delim = option + strlen(option); |
| } |
| |
| if (!strncmp(option, "rotate", delim - option)) { |
| if (drm_mode_parse_cmdline_int(delim, °)) |
| return -EINVAL; |
| |
| switch (deg) { |
| case 0: |
| rotation |= DRM_MODE_ROTATE_0; |
| break; |
| |
| case 90: |
| rotation |= DRM_MODE_ROTATE_90; |
| break; |
| |
| case 180: |
| rotation |= DRM_MODE_ROTATE_180; |
| break; |
| |
| case 270: |
| rotation |= DRM_MODE_ROTATE_270; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| } else if (!strncmp(option, "reflect_x", delim - option)) { |
| rotation |= DRM_MODE_REFLECT_X; |
| } else if (!strncmp(option, "reflect_y", delim - option)) { |
| rotation |= DRM_MODE_REFLECT_Y; |
| } else if (!strncmp(option, "margin_right", delim - option)) { |
| if (drm_mode_parse_cmdline_int(delim, &margin)) |
| return -EINVAL; |
| |
| mode->tv_margins.right = margin; |
| } else if (!strncmp(option, "margin_left", delim - option)) { |
| if (drm_mode_parse_cmdline_int(delim, &margin)) |
| return -EINVAL; |
| |
| mode->tv_margins.left = margin; |
| } else if (!strncmp(option, "margin_top", delim - option)) { |
| if (drm_mode_parse_cmdline_int(delim, &margin)) |
| return -EINVAL; |
| |
| mode->tv_margins.top = margin; |
| } else if (!strncmp(option, "margin_bottom", delim - option)) { |
| if (drm_mode_parse_cmdline_int(delim, &margin)) |
| return -EINVAL; |
| |
| mode->tv_margins.bottom = margin; |
| } else if (!strncmp(option, "panel_orientation", delim - option)) { |
| if (drm_mode_parse_panel_orientation(delim, mode)) |
| return -EINVAL; |
| } else if (!strncmp(option, "tv_mode", delim - option)) { |
| if (drm_mode_parse_tv_mode(delim, mode)) |
| return -EINVAL; |
| } else { |
| return -EINVAL; |
| } |
| sep = strchr(delim, ','); |
| option = sep + 1; |
| } while (sep); |
| |
| if (rotation && freestanding) |
| return -EINVAL; |
| |
| if (!(rotation & DRM_MODE_ROTATE_MASK)) |
| rotation |= DRM_MODE_ROTATE_0; |
| |
| /* Make sure there is exactly one rotation defined */ |
| if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) |
| return -EINVAL; |
| |
| mode->rotation_reflection = rotation; |
| |
| return 0; |
| } |
| |
| struct drm_named_mode { |
| const char *name; |
| unsigned int pixel_clock_khz; |
| unsigned int xres; |
| unsigned int yres; |
| unsigned int flags; |
| unsigned int tv_mode; |
| }; |
| |
| #define NAMED_MODE(_name, _pclk, _x, _y, _flags, _mode) \ |
| { \ |
| .name = _name, \ |
| .pixel_clock_khz = _pclk, \ |
| .xres = _x, \ |
| .yres = _y, \ |
| .flags = _flags, \ |
| .tv_mode = _mode, \ |
| } |
| |
| static const struct drm_named_mode drm_named_modes[] = { |
| NAMED_MODE("NTSC", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_NTSC), |
| NAMED_MODE("NTSC-J", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_NTSC_J), |
| NAMED_MODE("PAL", 13500, 720, 576, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_PAL), |
| NAMED_MODE("PAL-M", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_PAL_M), |
| }; |
| |
| static int drm_mode_parse_cmdline_named_mode(const char *name, |
| unsigned int name_end, |
| struct drm_cmdline_mode *cmdline_mode) |
| { |
| unsigned int i; |
| |
| if (!name_end) |
| return 0; |
| |
| /* If the name starts with a digit, it's not a named mode */ |
| if (isdigit(name[0])) |
| return 0; |
| |
| /* |
| * If there's an equal sign in the name, the command-line |
| * contains only an option and no mode. |
| */ |
| if (strnchr(name, name_end, '=')) |
| return 0; |
| |
| /* The connection status extras can be set without a mode. */ |
| if (name_end == 1 && |
| (name[0] == 'd' || name[0] == 'D' || name[0] == 'e')) |
| return 0; |
| |
| /* |
| * We're sure we're a named mode at this point, iterate over the |
| * list of modes we're aware of. |
| */ |
| for (i = 0; i < ARRAY_SIZE(drm_named_modes); i++) { |
| const struct drm_named_mode *mode = &drm_named_modes[i]; |
| int ret; |
| |
| ret = str_has_prefix(name, mode->name); |
| if (ret != name_end) |
| continue; |
| |
| strscpy(cmdline_mode->name, mode->name, sizeof(cmdline_mode->name)); |
| cmdline_mode->pixel_clock = mode->pixel_clock_khz; |
| cmdline_mode->xres = mode->xres; |
| cmdline_mode->yres = mode->yres; |
| cmdline_mode->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); |
| cmdline_mode->tv_mode = mode->tv_mode; |
| cmdline_mode->tv_mode_specified = true; |
| cmdline_mode->specified = true; |
| |
| return 1; |
| } |
| |
| return -EINVAL; |
| } |
| |
| /** |
| * drm_mode_parse_command_line_for_connector - parse command line modeline for connector |
| * @mode_option: optional per connector mode option |
| * @connector: connector to parse modeline for |
| * @mode: preallocated drm_cmdline_mode structure to fill out |
| * |
| * This parses @mode_option command line modeline for modes and options to |
| * configure the connector. |
| * |
| * This uses the same parameters as the fb modedb.c, except for an extra |
| * force-enable, force-enable-digital and force-disable bit at the end:: |
| * |
| * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] |
| * |
| * Additionals options can be provided following the mode, using a comma to |
| * separate each option. Valid options can be found in |
| * Documentation/fb/modedb.rst. |
| * |
| * The intermediate drm_cmdline_mode structure is required to store additional |
| * options from the command line modline like the force-enable/disable flag. |
| * |
| * Returns: |
| * True if a valid modeline has been parsed, false otherwise. |
| */ |
| bool drm_mode_parse_command_line_for_connector(const char *mode_option, |
| const struct drm_connector *connector, |
| struct drm_cmdline_mode *mode) |
| { |
| const char *name; |
| bool freestanding = false, parse_extras = false; |
| unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; |
| unsigned int mode_end = 0; |
| const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; |
| const char *options_ptr = NULL; |
| char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; |
| int len, ret; |
| |
| memset(mode, 0, sizeof(*mode)); |
| mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; |
| |
| if (!mode_option) |
| return false; |
| |
| name = mode_option; |
| |
| /* Locate the start of named options */ |
| options_ptr = strchr(name, ','); |
| if (options_ptr) |
| options_off = options_ptr - name; |
| else |
| options_off = strlen(name); |
| |
| /* Try to locate the bpp and refresh specifiers, if any */ |
| bpp_ptr = strnchr(name, options_off, '-'); |
| while (bpp_ptr && !isdigit(bpp_ptr[1])) |
| bpp_ptr = strnchr(bpp_ptr + 1, options_off, '-'); |
| if (bpp_ptr) |
| bpp_off = bpp_ptr - name; |
| |
| refresh_ptr = strnchr(name, options_off, '@'); |
| if (refresh_ptr) |
| refresh_off = refresh_ptr - name; |
| |
| /* Locate the end of the name / resolution, and parse it */ |
| if (bpp_ptr) { |
| mode_end = bpp_off; |
| } else if (refresh_ptr) { |
| mode_end = refresh_off; |
| } else if (options_ptr) { |
| mode_end = options_off; |
| parse_extras = true; |
| } else { |
| mode_end = strlen(name); |
| parse_extras = true; |
| } |
| |
| if (!mode_end) |
| return false; |
| |
| ret = drm_mode_parse_cmdline_named_mode(name, mode_end, mode); |
| if (ret < 0) |
| return false; |
| |
| /* |
| * Having a mode that starts by a letter (and thus is named) and |
| * an at-sign (used to specify a refresh rate) is disallowed. |
| */ |
| if (ret && refresh_ptr) |
| return false; |
| |
| /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ |
| if (!mode->specified && isdigit(name[0])) { |
| ret = drm_mode_parse_cmdline_res_mode(name, mode_end, |
| parse_extras, |
| connector, |
| mode); |
| if (ret) |
| return false; |
| |
| mode->specified = true; |
| } |
| |
| /* No mode? Check for freestanding extras and/or options */ |
| if (!mode->specified) { |
| unsigned int len = strlen(mode_option); |
| |
| if (bpp_ptr || refresh_ptr) |
| return false; /* syntax error */ |
| |
| if (len == 1 || (len >= 2 && mode_option[1] == ',')) |
| extra_ptr = mode_option; |
| else |
| options_ptr = mode_option - 1; |
| |
| freestanding = true; |
| } |
| |
| if (bpp_ptr) { |
| ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); |
| if (ret) |
| return false; |
| |
| mode->bpp_specified = true; |
| } |
| |
| if (refresh_ptr) { |
| ret = drm_mode_parse_cmdline_refresh(refresh_ptr, |
| &refresh_end_ptr, mode); |
| if (ret) |
| return false; |
| |
| mode->refresh_specified = true; |
| } |
| |
| /* |
| * Locate the end of the bpp / refresh, and parse the extras |
| * if relevant |
| */ |
| if (bpp_ptr && refresh_ptr) |
| extra_ptr = max(bpp_end_ptr, refresh_end_ptr); |
| else if (bpp_ptr) |
| extra_ptr = bpp_end_ptr; |
| else if (refresh_ptr) |
| extra_ptr = refresh_end_ptr; |
| |
| if (extra_ptr) { |
| if (options_ptr) |
| len = options_ptr - extra_ptr; |
| else |
| len = strlen(extra_ptr); |
| |
| ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, |
| connector, mode); |
| if (ret) |
| return false; |
| } |
| |
| if (options_ptr) { |
| ret = drm_mode_parse_cmdline_options(options_ptr + 1, |
| freestanding, |
| connector, mode); |
| if (ret) |
| return false; |
| } |
| |
| return true; |
| } |
| EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); |
| |
| static struct drm_display_mode *drm_named_mode(struct drm_device *dev, |
| struct drm_cmdline_mode *cmd) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(drm_named_modes); i++) { |
| const struct drm_named_mode *named_mode = &drm_named_modes[i]; |
| |
| if (strcmp(cmd->name, named_mode->name)) |
| continue; |
| |
| if (!cmd->tv_mode_specified) |
| continue; |
| |
| return drm_analog_tv_mode(dev, |
| named_mode->tv_mode, |
| named_mode->pixel_clock_khz * 1000, |
| named_mode->xres, |
| named_mode->yres, |
| named_mode->flags & DRM_MODE_FLAG_INTERLACE); |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode |
| * @dev: DRM device to create the new mode for |
| * @cmd: input command line modeline |
| * |
| * Returns: |
| * Pointer to converted mode on success, NULL on error. |
| */ |
| struct drm_display_mode * |
| drm_mode_create_from_cmdline_mode(struct drm_device *dev, |
| struct drm_cmdline_mode *cmd) |
| { |
| struct drm_display_mode *mode; |
| |
| if (cmd->xres == 0 || cmd->yres == 0) |
| return NULL; |
| |
| if (strlen(cmd->name)) |
| mode = drm_named_mode(dev, cmd); |
| else if (cmd->cvt) |
| mode = drm_cvt_mode(dev, |
| cmd->xres, cmd->yres, |
| cmd->refresh_specified ? cmd->refresh : 60, |
| cmd->rb, cmd->interlace, |
| cmd->margins); |
| else |
| mode = drm_gtf_mode(dev, |
| cmd->xres, cmd->yres, |
| cmd->refresh_specified ? cmd->refresh : 60, |
| cmd->interlace, |
| cmd->margins); |
| if (!mode) |
| return NULL; |
| |
| mode->type |= DRM_MODE_TYPE_USERDEF; |
| /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ |
| if (cmd->xres == 1366) |
| drm_mode_fixup_1366x768(mode); |
| drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
| return mode; |
| } |
| EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); |
| |
| /** |
| * drm_mode_convert_to_umode - convert a drm_display_mode into a modeinfo |
| * @out: drm_mode_modeinfo struct to return to the user |
| * @in: drm_display_mode to use |
| * |
| * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to |
| * the user. |
| */ |
| void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, |
| const struct drm_display_mode *in) |
| { |
| out->clock = in->clock; |
| out->hdisplay = in->hdisplay; |
| out->hsync_start = in->hsync_start; |
| out->hsync_end = in->hsync_end; |
| out->htotal = in->htotal; |
| out->hskew = in->hskew; |
| out->vdisplay = in->vdisplay; |
| out->vsync_start = in->vsync_start; |
| out->vsync_end = in->vsync_end; |
| out->vtotal = in->vtotal; |
| out->vscan = in->vscan; |
| out->vrefresh = drm_mode_vrefresh(in); |
| out->flags = in->flags; |
| out->type = in->type; |
| |
| switch (in->picture_aspect_ratio) { |
| case HDMI_PICTURE_ASPECT_4_3: |
| out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; |
| break; |
| case HDMI_PICTURE_ASPECT_16_9: |
| out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; |
| break; |
| case HDMI_PICTURE_ASPECT_64_27: |
| out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; |
| break; |
| case HDMI_PICTURE_ASPECT_256_135: |
| out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; |
| break; |
| default: |
| WARN(1, "Invalid aspect ratio (0%x) on mode\n", |
| in->picture_aspect_ratio); |
| fallthrough; |
| case HDMI_PICTURE_ASPECT_NONE: |
| out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; |
| break; |
| } |
| |
| strscpy_pad(out->name, in->name, sizeof(out->name)); |
| } |
| |
| /** |
| * drm_mode_convert_umode - convert a modeinfo into a drm_display_mode |
| * @dev: drm device |
| * @out: drm_display_mode to return to the user |
| * @in: drm_mode_modeinfo to use |
| * |
| * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to |
| * the caller. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_convert_umode(struct drm_device *dev, |
| struct drm_display_mode *out, |
| const struct drm_mode_modeinfo *in) |
| { |
| if (in->clock > INT_MAX || in->vrefresh > INT_MAX) |
| return -ERANGE; |
| |
| out->clock = in->clock; |
| out->hdisplay = in->hdisplay; |
| out->hsync_start = in->hsync_start; |
| out->hsync_end = in->hsync_end; |
| out->htotal = in->htotal; |
| out->hskew = in->hskew; |
| out->vdisplay = in->vdisplay; |
| out->vsync_start = in->vsync_start; |
| out->vsync_end = in->vsync_end; |
| out->vtotal = in->vtotal; |
| out->vscan = in->vscan; |
| out->flags = in->flags; |
| /* |
| * Old xf86-video-vmware (possibly others too) used to |
| * leave 'type' uninitialized. Just ignore any bits we |
| * don't like. It's a just hint after all, and more |
| * useful for the kernel->userspace direction anyway. |
| */ |
| out->type = in->type & DRM_MODE_TYPE_ALL; |
| strscpy_pad(out->name, in->name, sizeof(out->name)); |
| |
| /* Clearing picture aspect ratio bits from out flags, |
| * as the aspect-ratio information is not stored in |
| * flags for kernel-mode, but in picture_aspect_ratio. |
| */ |
| out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; |
| |
| switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { |
| case DRM_MODE_FLAG_PIC_AR_4_3: |
| out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3; |
| break; |
| case DRM_MODE_FLAG_PIC_AR_16_9: |
| out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9; |
| break; |
| case DRM_MODE_FLAG_PIC_AR_64_27: |
| out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27; |
| break; |
| case DRM_MODE_FLAG_PIC_AR_256_135: |
| out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135; |
| break; |
| case DRM_MODE_FLAG_PIC_AR_NONE: |
| out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| out->status = drm_mode_validate_driver(dev, out); |
| if (out->status != MODE_OK) |
| return -EINVAL; |
| |
| drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); |
| |
| return 0; |
| } |
| |
| /** |
| * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 |
| * output format |
| * |
| * @display: display under action |
| * @mode: video mode to be tested. |
| * |
| * Returns: |
| * true if the mode can be supported in YCBCR420 format |
| * false if not. |
| */ |
| bool drm_mode_is_420_only(const struct drm_display_info *display, |
| const struct drm_display_mode *mode) |
| { |
| u8 vic = drm_match_cea_mode(mode); |
| |
| return test_bit(vic, display->hdmi.y420_vdb_modes); |
| } |
| EXPORT_SYMBOL(drm_mode_is_420_only); |
| |
| /** |
| * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 |
| * output format also (along with RGB/YCBCR444/422) |
| * |
| * @display: display under action. |
| * @mode: video mode to be tested. |
| * |
| * Returns: |
| * true if the mode can be support YCBCR420 format |
| * false if not. |
| */ |
| bool drm_mode_is_420_also(const struct drm_display_info *display, |
| const struct drm_display_mode *mode) |
| { |
| u8 vic = drm_match_cea_mode(mode); |
| |
| return test_bit(vic, display->hdmi.y420_cmdb_modes); |
| } |
| EXPORT_SYMBOL(drm_mode_is_420_also); |
| /** |
| * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 |
| * output format |
| * |
| * @display: display under action. |
| * @mode: video mode to be tested. |
| * |
| * Returns: |
| * true if the mode can be supported in YCBCR420 format |
| * false if not. |
| */ |
| bool drm_mode_is_420(const struct drm_display_info *display, |
| const struct drm_display_mode *mode) |
| { |
| return drm_mode_is_420_only(display, mode) || |
| drm_mode_is_420_also(display, mode); |
| } |
| EXPORT_SYMBOL(drm_mode_is_420); |
| |
| /** |
| * drm_set_preferred_mode - Sets the preferred mode of a connector |
| * @connector: connector whose mode list should be processed |
| * @hpref: horizontal resolution of preferred mode |
| * @vpref: vertical resolution of preferred mode |
| * |
| * Marks a mode as preferred if it matches the resolution specified by @hpref |
| * and @vpref. |
| */ |
| void drm_set_preferred_mode(struct drm_connector *connector, |
| int hpref, int vpref) |
| { |
| struct drm_display_mode *mode; |
| |
| list_for_each_entry(mode, &connector->probed_modes, head) { |
| if (mode->hdisplay == hpref && |
| mode->vdisplay == vpref) |
| mode->type |= DRM_MODE_TYPE_PREFERRED; |
| } |
| } |
| EXPORT_SYMBOL(drm_set_preferred_mode); |