linux-kernel - [PATCH v2 6/7] drm/amd/display: Add handling for new "active color format" property

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Message-Id: <20210608174320.37429-7-wse@tuxedocomputers.com>
Date:   Tue,  8 Jun 2021 19:43:19 +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 v2 6/7] drm/amd/display: Add handling for new "active color format" property

This commit implements the "active color format" drm property for the AMD GPU
driver.

Signed-off-by: Werner Sembach <wse@...edocomputers.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 27 +++++++++++++++++--
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   |  1 +
 2 files changed, 26 insertions(+), 2 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 e57b2b743d36..019be46def1d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6525,6 +6525,23 @@ static int convert_dc_color_depth_into_bpc (enum dc_color_depth display_color_de
 	return 0;
 }
 
+static int convert_dc_pixel_encoding_into_drm_color_format(enum dc_pixel_encoding display_pixel_encoding)
+{
+	switch (display_pixel_encoding) {
+		case PIXEL_ENCODING_RGB:
+			return DRM_COLOR_FORMAT_RGB444;
+		case PIXEL_ENCODING_YCBCR422:
+			return DRM_COLOR_FORMAT_YCRCB422;
+		case PIXEL_ENCODING_YCBCR444:
+			return DRM_COLOR_FORMAT_YCRCB444;
+		case PIXEL_ENCODING_YCBCR420:
+			return DRM_COLOR_FORMAT_YCRCB420;
+		default:
+			break;
+		}
+	return 0;
+}
+
 static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder,
 					  struct drm_crtc_state *crtc_state,
 					  struct drm_connector_state *conn_state)
@@ -7522,6 +7539,7 @@ 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_active_color_format_property(&aconnector->base);
 	}
 
 	/* This defaults to the max in the range, but we want 8bpc for non-edp. */
@@ -8898,12 +8916,17 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 		if (crtc) {
 			new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 			dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
-			if (dm_new_crtc_state->stream)
+			if (dm_new_crtc_state->stream) {
 				new_con_state->active_bpc = convert_dc_color_depth_into_bpc(
 					dm_new_crtc_state->stream->timing.display_color_depth);
+				new_con_state->active_color_format = convert_dc_pixel_encoding_into_drm_color_format(
+					dm_new_crtc_state->stream->timing.pixel_encoding);
+			}
 		}
-		else
+		else {
 			new_con_state->active_bpc = 0;
+			new_con_state->active_color_format = 0;
+		}
 	}
 
 	/* Count number of newly disabled CRTCs for dropping PM refs later. */
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 2a8dc6b2c6c7..f68950da9ff8 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
@@ -400,6 +400,7 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 	if (connector->max_bpc_property) {
 		drm_connector_attach_max_bpc_property(connector, 8, 16);
 		drm_connector_attach_active_bpc_property(&aconnector->base, 8, 16);
+		drm_connector_attach_active_color_format_property(&aconnector->base);
 	}
 
 	connector->vrr_capable_property = master->base.vrr_capable_property;
-- 
2.25.1