[PATCH v4 10/13] drm/amd/display: Send correct DP colorspace infopacket

[Harry Wentland]

Look at connector->colorimetry to determine output colorspace.

We don't want to impact current SDR behavior, so
DRM_MODE_COLORIMETRY_DEFAULT preserves current behavior.

Also add support to explicitly set BT601 and BT709.

v4:
- Roll support for BT709 and BT601 into this patch
- Add default case to avoid warnings for unhandled
  enum values

Signed-off-by: Harry Wentland <harry.wentland at amd.com>
Cc: Pekka Paalanen <ppaalanen at gmail.com>
Cc: Sebastian Wick <sebastian.wick at redhat.com>
Cc: Vitaly.Prosyak at amd.com
Cc: Joshua Ashton <joshua at froggi.es>
Cc: Simon Ser <contact at emersion.fr>
Cc: Melissa Wen <mwen at igalia.com>
Cc: dri-devel at lists.freedesktop.org
Cc: amd-gfx at lists.freedesktop.org
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 48 ++++++++++++-------
 1 file changed, 31 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 5c290e6aac46..a8de26f09806 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5330,21 +5330,44 @@ get_aspect_ratio(const struct drm_display_mode *mode_in)
 }
 
 static enum dc_color_space
-get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing)
+get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing,
+		       const struct drm_connector_state *connector_state)
 {
 	enum dc_color_space color_space = COLOR_SPACE_SRGB;
 
-	switch (dc_crtc_timing->pixel_encoding)	{
-	case PIXEL_ENCODING_YCBCR422:
-	case PIXEL_ENCODING_YCBCR444:
-	case PIXEL_ENCODING_YCBCR420:
-	{
+	switch (connector_state->colorspace) {
+	case DRM_MODE_COLORIMETRY_BT601_YCC:
+		if (dc_crtc_timing->flags.Y_ONLY)
+			color_space = COLOR_SPACE_YCBCR601_LIMITED;
+		else
+			color_space = COLOR_SPACE_YCBCR601;
+		break;
+	case DRM_MODE_COLORIMETRY_BT709_YCC:
+		if (dc_crtc_timing->flags.Y_ONLY)
+			color_space = COLOR_SPACE_YCBCR709_LIMITED;
+		else
+			color_space = COLOR_SPACE_YCBCR709;
+		break;
+	case DRM_MODE_COLORIMETRY_OPRGB:
+		color_space = COLOR_SPACE_ADOBERGB;
+		break;
+	case DRM_MODE_COLORIMETRY_BT2020_RGB:
+	case DRM_MODE_COLORIMETRY_BT2020_YCC:
+		if (dc_crtc_timing->pixel_encoding == PIXEL_ENCODING_RGB)
+			color_space = COLOR_SPACE_2020_RGB_FULLRANGE;
+		else
+			color_space = COLOR_SPACE_2020_YCBCR;
+		break;
+	case DRM_MODE_COLORIMETRY_DEFAULT: // ITU601
+	default:
+		if (dc_crtc_timing->pixel_encoding == PIXEL_ENCODING_RGB) {
+			color_space = COLOR_SPACE_SRGB;
 		/*
 		 * 27030khz is the separation point between HDTV and SDTV
 		 * according to HDMI spec, we use YCbCr709 and YCbCr601
 		 * respectively
 		 */
-		if (dc_crtc_timing->pix_clk_100hz > 270300) {
+		} else if (dc_crtc_timing->pix_clk_100hz > 270300) {
 			if (dc_crtc_timing->flags.Y_ONLY)
 				color_space =
 					COLOR_SPACE_YCBCR709_LIMITED;
@@ -5357,15 +5380,6 @@ get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing)
 			else
 				color_space = COLOR_SPACE_YCBCR601;
 		}
-
-	}
-	break;
-	case PIXEL_ENCODING_RGB:
-		color_space = COLOR_SPACE_SRGB;
-		break;
-
-	default:
-		WARN_ON(1);
 		break;
 	}
 
@@ -5504,7 +5518,7 @@ static void fill_stream_properties_from_drm_display_mode(
 		}
 	}
 
-	stream->output_color_space = get_output_color_space(timing_out);
+	stream->output_color_space = get_output_color_space(timing_out, connector_state);
 }
 
 static void fill_audio_info(struct audio_info *audio_info,
-- 
2.40.1