From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
The AVI infoframe is able to inform the display whether the source is
sending full or limited range RGB data.
As per CEA-861 we must first check whether the display reports the
quantization range as selectable, and if so we can set the approriate
bits in the AVI inforframe.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_drv.h | 3 +++
drivers/gpu/drm/i915/intel_hdmi.c | 11 +++++++++++
drivers/gpu/drm/i915/intel_sdvo.c | 16 ++++++++++++++--
3 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 1a698c6..c5251d9 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -289,6 +289,8 @@ struct cxsr_latency {
#define DIP_LEN_AVI 13
#define DIP_AVI_PR_1 0
#define DIP_AVI_PR_2 1
+#define DIP_AVI_Q0 0x4
+#define DIP_AVI_Q1 0x8
#define DIP_TYPE_SPD 0x83
#define DIP_VERSION_SPD 0x1
@@ -347,6 +349,7 @@ struct intel_hdmi {
bool has_hdmi_sink;
bool has_audio;
enum hdmi_force_audio force_audio;
+ bool rgb_quant_range_selectable;
void (*write_infoframe)(struct drm_encoder *encoder,
struct dip_infoframe *frame);
void (*set_infoframes)(struct drm_encoder *encoder,
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 58b072e..270d7ee 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -331,6 +331,7 @@ static void intel_set_infoframe(struct drm_encoder *encoder,
static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
struct drm_display_mode *adjusted_mode)
{
+ struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
struct dip_infoframe avi_if = {
.type = DIP_TYPE_AVI,
.ver = DIP_VERSION_AVI,
@@ -340,6 +341,13 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
avi_if.body.avi.YQ_CN_PR |= DIP_AVI_PR_2;
+ if (intel_hdmi->rgb_quant_range_selectable) {
+ if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE)
+ avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_Q0;
+ else
+ avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_Q1;
+ }
+
avi_if.body.avi.VIC = drm_mode_cea_vic(adjusted_mode);
intel_set_infoframe(encoder, &avi_if);
@@ -825,6 +833,7 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
intel_hdmi->has_hdmi_sink = false;
intel_hdmi->has_audio = false;
+ intel_hdmi->rgb_quant_range_selectable = false;
edid = drm_get_edid(connector,
intel_gmbus_get_adapter(dev_priv,
intel_hdmi->ddc_bus));
@@ -836,6 +845,8 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
intel_hdmi->has_hdmi_sink =
drm_detect_hdmi_monitor(edid);
intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
+ intel_hdmi->rgb_quant_range_selectable =
+ drm_rgb_quant_range_selectable(edid);
}
kfree(edid);
}
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index b422109..af93999 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -126,6 +126,7 @@ struct intel_sdvo {
bool is_hdmi;
bool has_hdmi_monitor;
bool has_hdmi_audio;
+ bool rgb_quant_range_selectable;
/**
* This is set if we detect output of sdvo device as LVDS and
@@ -947,7 +948,8 @@ static bool intel_sdvo_write_infoframe(struct intel_sdvo *intel_sdvo,
&tx_rate, 1);
}
-static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo)
+static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo,
+ const struct drm_display_mode *adjusted_mode)
{
struct dip_infoframe avi_if = {
.type = DIP_TYPE_AVI,
@@ -956,6 +958,13 @@ static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo)
};
uint8_t sdvo_data[4 + sizeof(avi_if.body.avi)];
+ if (intel_sdvo->rgb_quant_range_selectable) {
+ if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE)
+ avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_Q0;
+ else
+ avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_Q1;
+ }
+
intel_dip_infoframe_csum(&avi_if);
/* sdvo spec says that the ecc is handled by the hw, and it looks like
@@ -1134,7 +1143,7 @@ static void intel_sdvo_mode_set(struct drm_encoder *encoder,
intel_sdvo_set_encode(intel_sdvo, SDVO_ENCODE_HDMI);
intel_sdvo_set_colorimetry(intel_sdvo,
SDVO_COLORIMETRY_RGB256);
- intel_sdvo_set_avi_infoframe(intel_sdvo);
+ intel_sdvo_set_avi_infoframe(intel_sdvo, adjusted_mode);
} else
intel_sdvo_set_encode(intel_sdvo, SDVO_ENCODE_DVI);
@@ -1526,6 +1535,8 @@ intel_sdvo_tmds_sink_detect(struct drm_connector *connector)
if (intel_sdvo->is_hdmi) {
intel_sdvo->has_hdmi_monitor = drm_detect_hdmi_monitor(edid);
intel_sdvo->has_hdmi_audio = drm_detect_monitor_audio(edid);
+ intel_sdvo->rgb_quant_range_selectable =
+ drm_rgb_quant_range_selectable(edid);
}
} else
status = connector_status_disconnected;
@@ -1577,6 +1588,7 @@ intel_sdvo_detect(struct drm_connector *connector, bool force)
intel_sdvo->has_hdmi_monitor = false;
intel_sdvo->has_hdmi_audio = false;
+ intel_sdvo->rgb_quant_range_selectable = false;
if ((intel_sdvo_connector->output_flag & response) == 0)
ret = connector_status_disconnected;
--
1.7.8.6
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