[PATCH 14/20] drm/i915: set colorspace for YCBCR420 outputs

[Shashank Sharma]

When output colorspace is YCBCR420, we have to load the
corresponding colorspace in AVI infoframe. This patch fills
the colorspace of AVI infoframe as per the output mode.

V2: Rebase
V3: Rebase
V4: Rebase
V5: Added r-b from Ander
V6: Checking RGB/YCBCR420 output only (Ville)

Reviewed-by: Ander Conselvan de Oliveira <conselvan2 at gmail.com>
Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
---
 drivers/gpu/drm/i915/intel_hdmi.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 9e8d784..2524ac4 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -461,6 +461,7 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
 		&crtc_state->base.adjusted_mode;
 	struct drm_connector *connector = &intel_hdmi->attached_connector->base;
 	bool is_hdmi2_sink = connector->display_info.hdmi.scdc.supported;
+	enum hdmi_colorspace colorspace = HDMI_COLORSPACE_RGB;
 	union hdmi_infoframe frame;
 	int ret;
 
@@ -472,6 +473,17 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
 		return;
 	}
 
+	if (crtc_state->ycbcr420)
+		colorspace = HDMI_COLORSPACE_YUV420;
+
+	ret = drm_hdmi_avi_infoframe_set_colorspace(&frame.avi,
+						    adjusted_mode,
+						    colorspace);
+	if (ret < 0) {
+		DRM_ERROR("couldn't fill AVI colorspace\n");
+		return;
+	}
+
 	drm_hdmi_avi_infoframe_quant_range(&frame.avi, adjusted_mode,
 					   crtc_state->limited_color_range ?
 					   HDMI_QUANTIZATION_RANGE_LIMITED :
-- 
2.7.4