diff options
| author | Imre Deak <imre.deak@intel.com> | 2023-10-24 13:22:16 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2023-11-08 17:22:09 +0200 |
| commit | a6315ec25eed0e9a70cb1cfc43cf694911546a5c (patch) | |
| tree | 9957abef21327c72c1bc6d7bf32138eb05534d50 /include/drm | |
| parent | b348150406564595cf6c1be388e9797fa97c2a5d (diff) | |
| download | linux-a6315ec25eed0e9a70cb1cfc43cf694911546a5c.tar.gz | |
drm/dp_mst: Add HBLANK expansion quirk for Synaptics MST hubs
Add a quirk for Synaptics MST hubs, which require a workaround - at leat
on i915 - for some modes, on which the hub applies HBLANK expansion.
These modes will only work by enabling DSC decompression for them, a
follow-up patch will do this in i915.
v2:
- Fix the quirk name in its DocBook description.
Cc: Lyude Paul <lyude@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231030155843.2251023-9-imre.deak@intel.com
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/display/drm_dp_helper.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 3369104e2d257..01636a679ee6c 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -632,6 +632,13 @@ enum drm_dp_quirk { * the DP_MAX_LINK_RATE register reporting a lower max multiplier. */ DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS, + /** + * @DP_DPCD_QUIRK_HBLANK_EXPANSION_REQUIRES_DSC: + * + * The device applies HBLANK expansion for some modes, but this + * requires enabling DSC. + */ + DP_DPCD_QUIRK_HBLANK_EXPANSION_REQUIRES_DSC, }; /** |