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drm/i915: Add support for limited color range of broadcast outputs

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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>
This commit is contained in:
Chris Wilson
2011-02-21 22:23:52 +00:00
parent ce453d81cb
commit e953fd7bb3
7 changed files with 82 additions and 2 deletions
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13
drivers/gpu/drm/i915/intel_hdmi.c
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@@ -41,6 +41,7 @@ struct intel_hdmi {
struct intel_encoder base;
u32 sdvox_reg;
int ddc_bus;
uint32_t color_range;
bool has_hdmi_sink;
bool has_audio;
int force_audio;
@@ -124,6 +125,7 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
u32 sdvox;
sdvox = SDVO_ENCODING_HDMI | SDVO_BORDER_ENABLE;
sdvox |= intel_hdmi->color_range;
if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
@@ -278,6 +280,7 @@ intel_hdmi_set_property(struct drm_connector *connector,
uint64_t val)
{
struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
struct drm_i915_private *dev_priv = connector->dev->dev_private;
int ret;
ret = drm_connector_property_set_value(connector, property, val);
@@ -305,6 +308,14 @@ intel_hdmi_set_property(struct drm_connector *connector,
goto done;
}
if (property == dev_priv->broadcast_rgb_property) {
if (val == !!intel_hdmi->color_range)
return 0;
intel_hdmi->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
goto done;
}
return -EINVAL;
done:
@@ -363,6 +374,8 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *c
intel_hdmi->force_audio_property->values[1] = 1;
drm_connector_attach_property(connector, intel_hdmi->force_audio_property, 0);
}
intel_attach_broadcast_rgb_property(connector);
}
void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)