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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2011-02-21 22:23:52 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2011-02-22 15:56:56 +0000 |
| commit | e953fd7bb32f55309a96abd5ceba9cf68d221434 (patch) | |
| tree | 67110619366878f6412405ab63b7525f1c627544 /drivers/gpu/drm/i915/intel_dp.c | |
| parent | ce453d81cb0397aa7d5148984f51907e14072d74 (diff) | |
| download | lwn-e953fd7bb32f55309a96abd5ceba9cf68d221434.tar.gz lwn-e953fd7bb32f55309a96abd5ceba9cf68d221434.zip | |
drm/i915: Add support for limited color range of broadcast outputs
In order to prevent "crushed blacks" on TVs, the range of the RGB output
may be limited to 16-235. This used to be available through Xorg under
the "Broadcast RGB" option, so reintroduce support for KMS.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34543
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 7ffb324b6a7d..3216adcf54d2 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -49,6 +49,7 @@ struct intel_dp { uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]; bool has_audio; int force_audio; + uint32_t color_range; int dpms_mode; uint8_t link_bw; uint8_t lane_count; @@ -741,8 +742,8 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_crtc *crtc = intel_dp->base.base.crtc; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - intel_dp->DP = (DP_VOLTAGE_0_4 | - DP_PRE_EMPHASIS_0); + intel_dp->DP = DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; + intel_dp->DP |= intel_dp->color_range; if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) intel_dp->DP |= DP_SYNC_HS_HIGH; @@ -1680,6 +1681,7 @@ intel_dp_set_property(struct drm_connector *connector, struct drm_property *property, uint64_t val) { + struct drm_i915_private *dev_priv = connector->dev->dev_private; struct intel_dp *intel_dp = intel_attached_dp(connector); int ret; @@ -1708,6 +1710,14 @@ intel_dp_set_property(struct drm_connector *connector, goto done; } + if (property == dev_priv->broadcast_rgb_property) { + if (val == !!intel_dp->color_range) + return 0; + + intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; + goto done; + } + return -EINVAL; done: @@ -1827,6 +1837,8 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect intel_dp->force_audio_property->values[1] = 1; drm_connector_attach_property(connector, intel_dp->force_audio_property, 0); } + + intel_attach_broadcast_rgb_property(connector); } void |