diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_mst.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_mst.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 73e397736463..e01f669d2c8a 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -1126,6 +1126,21 @@ static int intel_dp_mst_add_properties(struct intel_dp *intel_dp, return drm_connector_set_path_property(connector, pathprop); } +static void +intel_dp_mst_read_decompression_port_dsc_caps(struct intel_dp *intel_dp, + struct intel_connector *connector) +{ + u8 dpcd_caps[DP_RECEIVER_CAP_SIZE]; + + if (!connector->dp.dsc_decompression_aux) + return; + + if (drm_dp_read_dpcd_caps(connector->dp.dsc_decompression_aux, dpcd_caps) < 0) + return; + + intel_dp_get_dsc_sink_cap(dpcd_caps[DP_DPCD_REV], intel_dp, connector); +} + static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop) @@ -1159,6 +1174,14 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); + /* + * TODO: set the AUX for the actual MST port decompressing the stream. + * At the moment the driver only supports enabling this globally in the + * first downstream MST branch, via intel_dp's (root port) AUX. + */ + intel_connector->dp.dsc_decompression_aux = &intel_dp->aux; + intel_dp_mst_read_decompression_port_dsc_caps(intel_dp, intel_connector); + for_each_pipe(dev_priv, pipe) { struct drm_encoder *enc = &intel_dp->mst_encoders[pipe]->base.base; |