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| author |  Jani Nikula <jani.nikula@intel.com>
| 2024-03-19 11:12:48 +0200 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com>
| 2024-03-21 08:44:25 +0200 |
| commit | 281a2cc71a1b9fce8fde59b39671ca55c2bf6307 (patch) | |
| tree | 2ef7bf3a149f648009d71a6af52a99cbdf7b4b2b /include/drm | |
| parent | drm/i915: Rename ICL_PORT_TX_DW6 bits (diff) | |
| download | linux-281a2cc71a1b9fce8fde59b39671ca55c2bf6307.tar.gz linux-281a2cc71a1b9fce8fde59b39671ca55c2bf6307.tar.bz2 linux-281a2cc71a1b9fce8fde59b39671ca55c2bf6307.zip | |
drm/mst: read sideband messaging cap
Amend drm_dp_read_mst_cap() to return an enum, indicating "SST", "SST
with sideband messaging", or "MST". Modify all call sites to take the
new return value into account.
v2:
- Rename enumerators (Ville)
Cc: Arun R Murthy <arun.r.murthy@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Karol Herbst <kherbst@redhat.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@redhat.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b32a3704934871a67d06420b760e148b76c5ced8.1710839496.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/display/drm_dp_mst_helper.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/include/drm/display/drm_dp_mst_helper.h b/include/drm/display/drm_dp_mst_helper.h index 9b19d8bd520a..3c9e128c444a 100644 --- a/include/drm/display/drm_dp_mst_helper.h +++ b/include/drm/display/drm_dp_mst_helper.h @@ -818,7 +818,28 @@ int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); -bool drm_dp_read_mst_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); +/** + * enum drm_dp_mst_mode - sink's MST mode capability + */ +enum drm_dp_mst_mode { + /** + * @DRM_DP_SST: The sink does not support MST nor single stream sideband + * messaging. + */ + DRM_DP_SST, + /** + * @DRM_DP_MST: Sink supports MST, more than one stream and single + * stream sideband messaging. + */ + DRM_DP_MST, + /** + * @DRM_DP_SST_SIDEBAND_MSG: Sink supports only one stream and single + * stream sideband messaging. + */ + DRM_DP_SST_SIDEBAND_MSG, +}; + +enum drm_dp_mst_mode drm_dp_read_mst_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); int drm_dp_mst_hpd_irq_handle_event(struct drm_dp_mst_topology_mgr *mgr, |