linux-kernel - [PATCH v4 17/17] drm/amd/display: Add handling for new "Broadcast RGB" property

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Message-Id: <20210618091116.14428-18-wse@tuxedocomputers.com>
Date:   Fri, 18 Jun 2021 11:11:16 +0200
From:   Werner Sembach <wse@...edocomputers.com>
To:     harry.wentland@....com, sunpeng.li@....com,
        alexander.deucher@....com, christian.koenig@....com,
        airlied@...ux.ie, daniel@...ll.ch,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, jani.nikula@...ux.intel.com,
        joonas.lahtinen@...ux.intel.com, rodrigo.vivi@...el.com,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org
Cc:     Werner Sembach <wse@...edocomputers.com>
Subject: [PATCH v4 17/17] drm/amd/display: Add handling for new "Broadcast RGB" property

This commit implements the "Broadcast RGB" drm property for the AMD GPU
driver.

Signed-off-by: Werner Sembach <wse@...edocomputers.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 22 ++++++++++++++-----
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   |  4 ++++
 2 files changed, 21 insertions(+), 5 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 9ffd2f9d3d75..c5dbf948a47a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5252,7 +5252,8 @@ 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,
+		       enum drm_mode_color_range preferred_color_range)
 {
 	enum dc_color_space color_space = COLOR_SPACE_SRGB;
 
@@ -5267,13 +5268,17 @@ get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing)
 		 * respectively
 		 */
 		if (dc_crtc_timing->pix_clk_100hz > 270300) {
-			if (dc_crtc_timing->flags.Y_ONLY)
+			if (dc_crtc_timing->flags.Y_ONLY
+					|| preferred_color_range ==
+						DRM_MODE_COLOR_RANGE_LIMITED_16_235)
 				color_space =
 					COLOR_SPACE_YCBCR709_LIMITED;
 			else
 				color_space = COLOR_SPACE_YCBCR709;
 		} else {
-			if (dc_crtc_timing->flags.Y_ONLY)
+			if (dc_crtc_timing->flags.Y_ONLY
+					|| preferred_color_range ==
+						DRM_MODE_COLOR_RANGE_LIMITED_16_235)
 				color_space =
 					COLOR_SPACE_YCBCR601_LIMITED;
 			else
@@ -5283,7 +5288,10 @@ get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing)
 	}
 	break;
 	case PIXEL_ENCODING_RGB:
-		color_space = COLOR_SPACE_SRGB;
+		if (preferred_color_range == DRM_MODE_COLOR_RANGE_LIMITED_16_235)
+			color_space = COLOR_SPACE_SRGB_LIMITED;
+		else
+			color_space = COLOR_SPACE_SRGB;
 		break;
 
 	default:
@@ -5429,7 +5437,10 @@ static void fill_stream_properties_from_drm_display_mode(
 
 	timing_out->aspect_ratio = get_aspect_ratio(mode_in);
 
-	stream->output_color_space = get_output_color_space(timing_out);
+	stream->output_color_space = get_output_color_space(timing_out,
+							    connector_state ?
+							    connector_state->preferred_color_range :
+							    DRM_MODE_COLOR_RANGE_UNSET);
 
 	stream->out_transfer_func->type = TF_TYPE_PREDEFINED;
 	stream->out_transfer_func->tf = TRANSFER_FUNCTION_SRGB;
@@ -7780,6 +7791,7 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
 		drm_connector_attach_active_bpc_property(&aconnector->base, 8, 16);
 		drm_connector_attach_preferred_color_format_property(&aconnector->base);
 		drm_connector_attach_active_color_format_property(&aconnector->base);
+		drm_connector_attach_preferred_color_range_property(&aconnector->base);
 		drm_connector_attach_active_color_range_property(&aconnector->base);
 	}
 
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 2563788ba95a..80e1389fd0ec 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -421,6 +421,10 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 	if (connector->active_color_format_property)
 		drm_connector_attach_active_color_format_property(&aconnector->base);
 
+	connector->preferred_color_range_property = master->base.preferred_color_range_property;
+	if (connector->preferred_color_range_property)
+		drm_connector_attach_preferred_color_range_property(&aconnector->base);
+
 	connector->active_color_range_property = master->base.active_color_range_property;
 	if (connector->active_color_range_property)
 		drm_connector_attach_active_color_range_property(&aconnector->base);
-- 
2.25.1