diff options
| author | Imre Deak <imre.deak@intel.com> | 2023-10-10 14:25:03 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2023-10-16 17:00:36 +0300 |
| commit | 808b43fa7e56e94563b86af2703ba88ee156e3c2 (patch) | |
| tree | b7931504018b084a34c6e815316a0400e311a2f1 /drivers/gpu/drm/i915/display/intel_dp_mst.c | |
| parent | 7389829f212d30d9588b969ff4a7b4d0005720a1 (diff) | |
drm/i915/dp_mst: Set connector DSC capabilities and decompression AUX
Similarly to eDP and SST-DP connectors read out the DSC capabilities for
MST connectors as well. Atm these will match the root port's DSC caps
and only used after a follow-up change enables the decompression for
each stream separately (vs. the current way of enabling it only globally
in the first branch device downstream of the root port).
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231010112504.2156789-3-imre.deak@intel.com
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; |