diff options
| -rw-r--r-- | drivers/gpu/drm/display/drm_dp_mst_topology.c | 4 | ||||
| -rw-r--r-- | include/drm/display/drm_dp.h | 1 | ||||
| -rw-r--r-- | include/drm/display/drm_dp_mst_helper.h | 3 |
3 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c index 57e65423e50d..3ffa0e893617 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -5908,8 +5908,10 @@ struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port) /* Enpoint decompression with DP-to-DP peer device */ if ((endpoint_dsc & DP_DSC_DECOMPRESSION_IS_SUPPORTED) && (endpoint_fec & DP_FEC_CAPABLE) && - (upstream_dsc & 0x2) /* DSC passthrough */) + (upstream_dsc & DP_DSC_PASSTHROUGH_IS_SUPPORTED)) { + port->passthrough_aux = &immediate_upstream_port->aux; return &port->aux; + } /* Virtual DPCD decompression with DP-to-DP peer device */ return &immediate_upstream_port->aux; diff --git a/include/drm/display/drm_dp.h b/include/drm/display/drm_dp.h index 9e3aff7e68bb..4d0abe4c7ea9 100644 --- a/include/drm/display/drm_dp.h +++ b/include/drm/display/drm_dp.h @@ -239,6 +239,7 @@ #define DP_DSC_SUPPORT 0x060 /* DP 1.4 */ # define DP_DSC_DECOMPRESSION_IS_SUPPORTED (1 << 0) +# define DP_DSC_PASSTHROUGH_IS_SUPPORTED (1 << 1) #define DP_DSC_REV 0x061 # define DP_DSC_MAJOR_MASK (0xf << 0) diff --git a/include/drm/display/drm_dp_mst_helper.h b/include/drm/display/drm_dp_mst_helper.h index 10adec068b7f..4a39c95f8afd 100644 --- a/include/drm/display/drm_dp_mst_helper.h +++ b/include/drm/display/drm_dp_mst_helper.h @@ -86,6 +86,8 @@ struct drm_dp_vcpi { * @next: link to next port on this branch device * @aux: i2c aux transport to talk to device connected to this port, protected * by &drm_dp_mst_topology_mgr.base.lock. + * @passthrough_aux: parent aux to which DSC pass-through requests should be + * sent, only set if DSC pass-through is possible. * @parent: branch device parent of this port * @vcpi: Virtual Channel Payload info for this port. * @connector: DRM connector this port is connected to. Protected by @@ -140,6 +142,7 @@ struct drm_dp_mst_port { */ struct drm_dp_mst_branch *mstb; struct drm_dp_aux aux; /* i2c bus for this port? */ + struct drm_dp_aux *passthrough_aux; struct drm_dp_mst_branch *parent; struct drm_dp_vcpi vcpi; |