diff options
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 60 |
1 files changed, 53 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 05bb7311a..d5d2c03fd 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2044,7 +2044,7 @@ mode_in_range(const struct drm_display_mode *mode, struct edid *edid, static bool valid_inferred_mode(const struct drm_connector *connector, const struct drm_display_mode *mode) { - struct drm_display_mode *m; + const struct drm_display_mode *m; bool ok = false; list_for_each_entry(m, &connector->probed_modes, head) { @@ -2418,6 +2418,8 @@ add_cvt_modes(struct drm_connector *connector, struct edid *edid) return closure.modes; } +static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode); + static void do_detailed_mode(struct detailed_timing *timing, void *c) { @@ -2434,6 +2436,13 @@ do_detailed_mode(struct detailed_timing *timing, void *c) if (closure->preferred) newmode->type |= DRM_MODE_TYPE_PREFERRED; + /* + * Detailed modes are limited to 10kHz pixel clock resolution, + * so fix up anything that looks like CEA/HDMI mode, but the clock + * is just slightly off. + */ + fixup_detailed_cea_mode_clock(newmode); + drm_mode_probed_add(closure->connector, newmode); closure->modes++; closure->preferred = 0; @@ -2529,9 +2538,9 @@ cea_mode_alternate_clock(const struct drm_display_mode *cea_mode) * and the 60Hz variant otherwise. */ if (cea_mode->vdisplay == 240 || cea_mode->vdisplay == 480) - clock = clock * 1001 / 1000; + clock = DIV_ROUND_CLOSEST(clock * 1001, 1000); else - clock = DIV_ROUND_UP(clock * 1000, 1001); + clock = DIV_ROUND_CLOSEST(clock * 1000, 1001); return clock; } @@ -3103,6 +3112,45 @@ add_cea_modes(struct drm_connector *connector, struct edid *edid) return modes; } +static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode) +{ + const struct drm_display_mode *cea_mode; + int clock1, clock2, clock; + u8 mode_idx; + const char *type; + + mode_idx = drm_match_cea_mode(mode) - 1; + if (mode_idx < ARRAY_SIZE(edid_cea_modes)) { + type = "CEA"; + cea_mode = &edid_cea_modes[mode_idx]; + clock1 = cea_mode->clock; + clock2 = cea_mode_alternate_clock(cea_mode); + } else { + mode_idx = drm_match_hdmi_mode(mode) - 1; + if (mode_idx < ARRAY_SIZE(edid_4k_modes)) { + type = "HDMI"; + cea_mode = &edid_4k_modes[mode_idx]; + clock1 = cea_mode->clock; + clock2 = hdmi_mode_alternate_clock(cea_mode); + } else { + return; + } + } + + /* pick whichever is closest */ + if (abs(mode->clock - clock1) < abs(mode->clock - clock2)) + clock = clock1; + else + clock = clock2; + + if (mode->clock == clock) + return; + + DRM_DEBUG("detailed mode matches %s VIC %d, adjusting clock %d -> %d\n", + type, mode_idx + 1, mode->clock, clock); + mode->clock = clock; +} + static void parse_hdmi_vsdb(struct drm_connector *connector, const u8 *db) { @@ -3361,7 +3409,7 @@ EXPORT_SYMBOL(drm_edid_to_speaker_allocation); * the sink doesn't support audio or video. */ int drm_av_sync_delay(struct drm_connector *connector, - struct drm_display_mode *mode) + const struct drm_display_mode *mode) { int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); int a, v; @@ -3396,7 +3444,6 @@ EXPORT_SYMBOL(drm_av_sync_delay); /** * drm_select_eld - select one ELD from multiple HDMI/DP sinks * @encoder: the encoder just changed display mode - * @mode: the adjusted display mode * * It's possible for one encoder to be associated with multiple HDMI/DP sinks. * The policy is now hard coded to simply use the first HDMI/DP sink's ELD. @@ -3404,8 +3451,7 @@ EXPORT_SYMBOL(drm_av_sync_delay); * Return: The connector associated with the first HDMI/DP sink that has ELD * attached to it. */ -struct drm_connector *drm_select_eld(struct drm_encoder *encoder, - struct drm_display_mode *mode) +struct drm_connector *drm_select_eld(struct drm_encoder *encoder) { struct drm_connector *connector; struct drm_device *dev = encoder->dev; |