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authorImre Deak <imre.deak@intel.com>2024-10-09 14:01:35 +0300
committerJoonas Lahtinen <joonas.lahtinen@linux.intel.com>2024-10-16 14:56:40 +0300
commit2f54e71359eb2abc0bdf6619cd356e5e350ff27b (patch)
tree4d66672d2064512b1194870d4ea735989e463518 /drivers/gpu/drm/i915
parent69b3d87212676c4c22aa4660435e2066dc7d1311 (diff)
drm/i915/dp_mst: Don't require DSC hblank quirk for a non-DSC compatible mode
If an MST branch device doesn't support DSC for a given mode, but the MST link has enough BW for the mode, assume that the branch device does support the mode using an uncompressed stream. Fixes: 55eaef164174 ("drm/i915/dp_mst: Handle the Synaptics HBlank expansion quirk") Cc: stable@vger.kernel.org # v6.8+ Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241009110135.1216498-2-imre.deak@intel.com (cherry picked from commit 4e75c3e208a06ad6fd9b3517fb77337460d7c2b0) Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915')
-rw-r--r--drivers/gpu/drm/i915/display/intel_dp_mst.c3
1 files changed, 3 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 8c22df790751..eeaedd979354 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -466,6 +466,9 @@ hblank_expansion_quirk_needs_dsc(const struct intel_connector *connector,
if (mode_hblank_period_ns(adjusted_mode) > hblank_limit)
return false;
+ if (!intel_dp_mst_dsc_get_slice_count(connector, crtc_state))
+ return false;
+
return true;
}