[PATCH 08/20] drm: set output colorspace in AVI infoframe

[Shashank Sharma]

A source must set output colorspace information in AVI
infoframes, so that the sink can decode upcoming frames
accordingly.

This patch adds a function to add the output colorspace
information in the AVI infoframes.

V2: Rebase
V3: Rebase
V4: Rebase
V5: Rebase
V6: Made patch independent of HDMI output type.

Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
---
 drivers/gpu/drm/drm_edid.c | 29 +++++++++++++++++++++++++++++
 include/drm/drm_edid.h     |  5 +++++
 2 files changed, 34 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 944a28f..cede86e 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4796,6 +4796,35 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_from_display_mode);
 
 /**
+ * drm_hdmi_avi_infoframe_set_colorspace - fill an HDMI AVI infoframe with
+ * colorspace data of the output type
+ *
+ * @frame: HDMI AVI infoframe
+ * @mode: DRM display mode
+ * @hdmi_output: HDMI output colorspace
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int
+drm_hdmi_avi_infoframe_set_colorspace(struct hdmi_avi_infoframe *frame,
+				      const struct drm_display_mode *mode,
+				      enum hdmi_colorspace colorspace)
+{
+	if (colorspace > HDMI_COLORSPACE_YUV420 ||
+		colorspace < HDMI_COLORSPACE_RGB) {
+		DRM_ERROR("Invalid color space type\n");
+		return -EINVAL;
+	}
+
+	frame->colorspace = colorspace;
+	if (colorspace == HDMI_COLORSPACE_YUV420)
+		frame->pixel_repeat = 0;
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_hdmi_avi_infoframe_set_colorspace);
+
+/**
  * drm_hdmi_avi_infoframe_quant_range() - fill the HDMI AVI infoframe
  *                                        quantization range information
  * @frame: HDMI AVI infoframe
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index aa58146..b79e0cb 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -332,6 +332,7 @@ struct cea_sad {
 struct drm_encoder;
 struct drm_connector;
 struct drm_display_mode;
+enum drm_hdmi_output_type;
 
 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid);
 int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
@@ -354,6 +355,10 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
 					 const struct drm_display_mode *mode,
 					 bool is_hdmi2_sink);
 int
+drm_hdmi_avi_infoframe_set_colorspace(struct hdmi_avi_infoframe *frame,
+					 const struct drm_display_mode *mode,
+					 enum hdmi_colorspace colorspace);
+int
 drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
 					    const struct drm_display_mode *mode);
 void
-- 
2.7.4