linux-kernel - [PATCH v4 07/17] drm/amd/display: Add handling for new "active color format" property

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Message-Id: <20210618091116.14428-8-wse@tuxedocomputers.com>
Date:   Fri, 18 Jun 2021 11:11:06 +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 07/17] 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 | 29 +++++++++++++++++--
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   |  4 +++
 2 files changed, 31 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 b6293b3104ed..5086d6d74bf6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6715,6 +6715,24 @@ 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)
@@ -7716,6 +7734,7 @@ 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. */
@@ -9092,12 +9111,18 @@ 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) {
 				drm_connector_set_active_bpc_property(connector,
 					convert_dc_color_depth_into_bpc(
 					dm_new_crtc_state->stream->timing.display_color_depth));
-		} else
+				drm_connector_set_active_color_format_property(connector,
+					convert_dc_pixel_encoding_into_drm_color_format(
+					dm_new_crtc_state->stream->timing.pixel_encoding));
+			}
+		} else {
 			drm_connector_set_active_bpc_property(connector, 0);
+			drm_connector_set_active_color_format_property(connector, 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 0cf38743ec47..13151d13aa73 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->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);
+
 	connector->vrr_capable_property = master->base.vrr_capable_property;
 	if (connector->vrr_capable_property)
 		drm_connector_attach_vrr_capable_property(connector);
-- 
2.25.1