[v2 2/2] drm/i915: Attach colorspace property and enable modeset

[Uma Shankar <uma.shankar@intel.com>]

This patch attaches the colorspace connector property to the
hdmi connector. Based on colorspace change, modeset will be
triggered to switch to new colorspace.

Based on colorspace property value create an infoframe
with appropriate colorspace. This can be used to send an
infoframe packet with proper colorspace value set which
will help to enable wider color gamut like BT2020 on sink.

v2: Merged the changes of creating infoframe as well to this
patch as per Maarten's suggestion.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_atomic.c | 1 +
 drivers/gpu/drm/i915/intel_hdmi.c   | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index a5a2c8f..35ef70a 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -125,6 +125,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
 	 */
 	if (new_conn_state->force_audio != old_conn_state->force_audio ||
 	    new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
+	    new_state->colorspace != old_state->colorspace ||
 	    new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
 	    new_conn_state->base.content_type != old_conn_state->base.content_type ||
 	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode)
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 129b880..8a41fb3 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -486,6 +486,8 @@ static void intel_hdmi_set_avi_infoframe(struct intel_encoder *encoder,
 	else
 		frame.avi.colorspace = HDMI_COLORSPACE_RGB;
 
+	frame.avi.extended_colorimetry = conn_state->colorspace;
+
 	drm_hdmi_avi_infoframe_quant_range(&frame.avi, adjusted_mode,
 					   crtc_state->limited_color_range ?
 					   HDMI_QUANTIZATION_RANGE_LIMITED :
@@ -2125,6 +2127,9 @@ static void intel_hdmi_destroy(struct drm_connector *connector)
 	intel_attach_broadcast_rgb_property(connector);
 	intel_attach_aspect_ratio_property(connector);
 	drm_connector_attach_content_type_property(connector);
+	drm_object_attach_property(&connector->base,
+			connector->dev->mode_config.colorspace_property,
+			COLORIMETRY_ITU_709);
 	connector->state->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
 }
 
-- 
1.9.1

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