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drm/i915/dp_mst: Don't require DSC hblank quirk for a non-DSC compatible mode

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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: 55eaef1641 ("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>
This commit is contained in:
Imre Deak 2024-10-09 14:01:35 +03:00 committed by Joonas Lahtinen
parent 69b3d87212
commit 2f54e71359
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/display/intel_dp_mst.c
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@ -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;
}