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From:   Werner Sembach <wse@tuxedocomputers.com>
To:     harry.wentland@amd.com, sunpeng.li@amd.com,
        alexander.deucher@amd.com, christian.koenig@amd.com,
        airlied@linux.ie, daniel@ffwll.ch,
        maarten.lankhorst@linux.intel.com, mripard@kernel.org,
        tzimmermann@suse.de, jani.nikula@linux.intel.com,
        joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com,
        amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
        emil.l.velikov@gmail.com
Cc:     Werner Sembach <wse@tuxedocomputers.com>
Subject: [PATCH v5 04/17] drm/amd/display: Add handling for new "active bpc" property
Date:   Wed, 30 Jun 2021 17:10:05 +0200
Message-Id: <20210630151018.330354-5-wse@tuxedocomputers.com>
In-Reply-To: <20210630151018.330354-1-wse@tuxedocomputers.com>
References: <20210630151018.330354-1-wse@tuxedocomputers.com>
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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 | 24 ++++++++++++++++++-
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   |  4 ++++
 2 files changed, 27 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 f4abb5f215d1..d984de82ae63 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7708,8 +7708,10 @@ 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;
@@ -9078,6 +9080,26 @@ 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;
+		struct dc_stream_state *stream;
+
+		if (crtc) {
+			new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+			dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
+			stream = dm_new_crtc_state->stream;
+
+			if (stream)
+				drm_connector_set_active_bpc_property(connector,
+					stream->timing.flags.DSC ?
+						stream->timing.dsc_cfg.bits_per_pixel / 16 / 3 :
+						convert_dc_color_depth_into_bpc(
+							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