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Subject[PATCH v4 04/17] drm/amd/display: Add handling for new "active bpc" property
Date
This commit implements the "active bpc" drm property for the AMD GPU
driver.

Signed-off-by: Werner Sembach <wse@tuxedocomputers.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 19 ++++++++++++++++++-
.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 4 ++++
2 files changed, 22 insertions(+), 1 deletion(-)

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 cd1df5cf4815..b6293b3104ed 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7713,8 +7713,10 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
adev->mode_info.underscan_vborder_property,
0);

- if (!aconnector->mst_port)
+ if (!aconnector->mst_port) {
drm_connector_attach_max_bpc_property(&aconnector->base, 8, 16);
+ drm_connector_attach_active_bpc_property(&aconnector->base, 8, 16);
+ }

/* This defaults to the max in the range, but we want 8bpc for non-edp. */
aconnector->base.state->max_bpc = (connector_type == DRM_MODE_CONNECTOR_eDP) ? 16 : 8;
@@ -9083,6 +9085,21 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
mutex_unlock(&dm->dc_lock);
}

+ /* Extract information from crtc to communicate it to userspace as connector properties */
+ for_each_new_connector_in_state(state, connector, new_con_state, i) {
+ struct drm_crtc *crtc = new_con_state->crtc;
+
+ 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)
+ 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_bpc_property(connector, 0);
+ }
+
/* Count number of newly disabled CRTCs for dropping PM refs later. */
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
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 5568d4e518e6..0cf38743ec47 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
@@ -409,6 +409,10 @@ 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);

+ connector->active_bpc_property = master->base.active_bpc_property;
+ if (connector->active_bpc_property)
+ drm_connector_attach_active_bpc_property(&aconnector->base, 8, 16);
+
connector->vrr_capable_property = master->base.vrr_capable_property;
if (connector->vrr_capable_property)
drm_connector_attach_vrr_capable_property(connector);
--
2.25.1
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