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Subject[PATCH v4 13/17] drm/amd/display: Add handling for new "preferred color format" property
Date
This commit implements the "preferred color format" drm property for the
AMD GPU driver.

Signed-off-by: Werner Sembach <wse@tuxedocomputers.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 30 +++++++++++++++----
.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 4 +++
2 files changed, 28 insertions(+), 6 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 bce47f28e20a..9ffd2f9d3d75 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5351,15 +5351,32 @@ static void fill_stream_properties_from_drm_display_mode(
timing_out->h_border_right = 0;
timing_out->v_border_top = 0;
timing_out->v_border_bottom = 0;
- /* TODO: un-hardcode */
- if (drm_mode_is_420_only(info, mode_in)
- || (drm_mode_is_420_also(info, mode_in) && aconnector->force_yuv420_output))
+
+ if (connector_state
+ && (connector_state->preferred_color_format == DRM_COLOR_FORMAT_YCRCB420
+ || aconnector->force_yuv420_output) && drm_mode_is_420(info, mode_in))
timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420;
- else if ((connector->display_info.color_formats & DRM_COLOR_FORMAT_YCRCB444)
- && stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
+ else if (connector_state
+ && connector_state->preferred_color_format == DRM_COLOR_FORMAT_YCRCB444
+ && connector->display_info.color_formats & DRM_COLOR_FORMAT_YCRCB444)
timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR444;
- else
+ else if (connector_state
+ && connector_state->preferred_color_format == DRM_COLOR_FORMAT_RGB444
+ && !drm_mode_is_420_only(info, mode_in))
timing_out->pixel_encoding = PIXEL_ENCODING_RGB;
+ else
+ /*
+ * connector_state->preferred_color_format not possible
+ * || connector_state->preferred_color_format == 0 (auto)
+ * || connector_state->preferred_color_format == DRM_COLOR_FORMAT_YCRCB422
+ */
+ if (drm_mode_is_420_only(info, mode_in))
+ timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420;
+ else if ((connector->display_info.color_formats & DRM_COLOR_FORMAT_YCRCB444)
+ && stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
+ timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR444;
+ else
+ timing_out->pixel_encoding = PIXEL_ENCODING_RGB;

timing_out->timing_3d_format = TIMING_3D_FORMAT_NONE;
timing_out->display_color_depth = convert_color_depth_from_display_info(
@@ -7761,6 +7778,7 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
if (!aconnector->mst_port) {
drm_connector_attach_max_bpc_property(&aconnector->base, 8, 16);
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_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 b5d57bbbdd20..2563788ba95a 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
@@ -413,6 +413,10 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
if (connector->active_bpc_property)
drm_connector_attach_active_bpc_property(&aconnector->base, 8, 16);

+ connector->preferred_color_format_property = master->base.preferred_color_format_property;
+ if (connector->preferred_color_format_property)
+ drm_connector_attach_preferred_color_format_property(&aconnector->base);
+
connector->active_color_format_property = master->base.active_color_format_property;
if (connector->active_color_format_property)
drm_connector_attach_active_color_format_property(&aconnector->base);
--
2.25.1
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