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

[Werner Sembach]

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

Signed-off-by: Werner Sembach <w...@tuxedocomputers.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