drm: Add solid fill pixel source

Add "SOLID_FILL" as a valid pixel source. If the pixel_source property is
set to "SOLID_FILL", it will display data from the drm_plane "solid_fill"
blob property.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Sebastian Wick <sebastian@sebastianwick.net>
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231027-solid-fill-v7-3-780188bfa7b2@quicinc.com

drivers/gpu/drm/drm_blend.c

@@ -204,6 +204,9 @@
  *	"FB":
  *		Framebuffer source set by the "FB_ID" property.
  *
+ *	"SOLID_FILL":
+ *		Solid fill color source set by the "solid_fill" property.
+ *
  * solid_fill:
  *	solid_fill is set up with drm_plane_create_solid_fill_property(). It
  *	contains pixel data that drivers can use to fill a plane.
@@ -642,6 +645,7 @@ EXPORT_SYMBOL(drm_plane_create_blend_mode_property);
 static const struct drm_prop_enum_list drm_pixel_source_enum_list[] = {
 	{ DRM_PLANE_PIXEL_SOURCE_NONE, "NONE" },
 	{ DRM_PLANE_PIXEL_SOURCE_FB, "FB" },
+	{ DRM_PLANE_PIXEL_SOURCE_SOLID_FILL, "SOLID_FILL" },
 };
 
 /**
@@ -666,6 +670,9 @@ static const struct drm_prop_enum_list drm_pixel_source_enum_list[] = {
  * "FB":
  *	Framebuffer pixel source
  *
+ * "SOLID_FILL":
+ * 	Solid fill color pixel source
+ *
  * Returns:
  * Zero on success, negative errno on failure.
  */
@@ -675,7 +682,8 @@ int drm_plane_create_pixel_source_property(struct drm_plane *plane,
 	struct drm_device *dev = plane->dev;
 	struct drm_property *prop;
 	static const unsigned int valid_source_mask = BIT(DRM_PLANE_PIXEL_SOURCE_FB) |
-						      BIT(DRM_PLANE_PIXEL_SOURCE_NONE);
+						      BIT(DRM_PLANE_PIXEL_SOURCE_NONE) |
+						      BIT(DRM_PLANE_PIXEL_SOURCE_SOLID_FILL);
 	int i;
 
 	/* FB is supported by default */

include/drm/drm_plane.h

@@ -43,6 +43,7 @@ enum drm_scaling_filter {
 enum drm_plane_pixel_source {
 	DRM_PLANE_PIXEL_SOURCE_NONE,
 	DRM_PLANE_PIXEL_SOURCE_FB,
+	DRM_PLANE_PIXEL_SOURCE_SOLID_FILL,
 	DRM_PLANE_PIXEL_SOURCE_MAX
 };