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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>
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/i915_drv.h
View File

@ -707,6 +707,8 @@ typedef struct drm_i915_private {
/* list of fbdev register on this device */
struct intel_fbdev *fbdev;
struct drm_property *broadcast_rgb_property;
} drm_i915_private_t;
struct drm_i915_gem_object {

1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -1387,6 +1387,7 @@
#define SDVO_ENCODING_HDMI (0x2 << 10)
/** Requird for HDMI operation */
#define SDVO_NULL_PACKETS_DURING_VSYNC (1 << 9)
#define SDVO_COLOR_RANGE_16_235 (1 << 8)
#define SDVO_BORDER_ENABLE (1 << 7)
#define SDVO_AUDIO_ENABLE (1 << 6)
/** New with 965, default is to be set */

16
drivers/gpu/drm/i915/intel_dp.c
View File

@ -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

2
drivers/gpu/drm/i915/intel_drv.h
View File

@ -237,6 +237,8 @@ struct intel_unpin_work {
int intel_ddc_get_modes(struct drm_connector *c, struct i2c_adapter *adapter);
extern bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus);
extern void intel_attach_broadcast_rgb_property(struct drm_connector *connector);
extern void intel_crt_init(struct drm_device *dev);
extern void intel_hdmi_init(struct drm_device *dev, int sdvox_reg);
void intel_dip_infoframe_csum(struct dip_infoframe *avi_if);

13
drivers/gpu/drm/i915/intel_hdmi.c
View File

@ -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)

30
drivers/gpu/drm/i915/intel_modes.c
View File

@ -80,3 +80,33 @@ int intel_ddc_get_modes(struct drm_connector *connector,
return ret;
}
static const char *broadcast_rgb_names[] = {
"Full",
"Limited 16:235",
};
void
intel_attach_broadcast_rgb_property(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_property *prop;
int i;
prop = dev_priv->broadcast_rgb_property;
if (prop == NULL) {
prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
"Broadcast RGB",
ARRAY_SIZE(broadcast_rgb_names));
if (prop == NULL)
return;
for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
drm_property_add_enum(prop, i, i, broadcast_rgb_names[i]);
dev_priv->broadcast_rgb_property = prop;
}
drm_connector_attach_property(connector, prop, 0);
}

20
drivers/gpu/drm/i915/intel_sdvo.c
View File

@ -92,6 +92,12 @@ struct intel_sdvo {
*/
uint16_t attached_output;
/**
* This is used to select the color range of RBG outputs in HDMI mode.
* It is only valid when using TMDS encoding and 8 bit per color mode.
*/
uint32_t color_range;
/**
* This is set if we're going to treat the device as TV-out.
*
@ -1056,6 +1062,8 @@ static void intel_sdvo_mode_set(struct drm_encoder *encoder,
/* Set the SDVO control regs. */
if (INTEL_INFO(dev)->gen >= 4) {
sdvox = 0;
if (intel_sdvo->is_hdmi)
sdvox |= intel_sdvo->color_range;
if (INTEL_INFO(dev)->gen < 5)
sdvox |= SDVO_BORDER_ENABLE;
if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
@ -1695,6 +1703,7 @@ intel_sdvo_set_property(struct drm_connector *connector,
{
struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
struct drm_i915_private *dev_priv = connector->dev->dev_private;
uint16_t temp_value;
uint8_t cmd;
int ret;
@ -1724,6 +1733,14 @@ intel_sdvo_set_property(struct drm_connector *connector,
goto done;
}
if (property == dev_priv->broadcast_rgb_property) {
if (val == !!intel_sdvo->color_range)
return 0;
intel_sdvo->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
goto done;
}
#define CHECK_PROPERTY(name, NAME) \
if (intel_sdvo_connector->name == property) { \
if (intel_sdvo_connector->cur_##name == temp_value) return 0; \
@ -2028,6 +2045,9 @@ intel_sdvo_add_hdmi_properties(struct intel_sdvo_connector *connector)
drm_connector_attach_property(&connector->base.base,
connector->force_audio_property, 0);
}
if (INTEL_INFO(dev)->gen >= 4 && IS_MOBILE(dev))
intel_attach_broadcast_rgb_property(&connector->base.base);
}
static bool