From 2f54e71359eb2abc0bdf6619cd356e5e350ff27b Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Wed, 9 Oct 2024 14:01:35 +0300 Subject: [PATCH] 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 Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20241009110135.1216498-2-imre.deak@intel.com (cherry picked from commit 4e75c3e208a06ad6fd9b3517fb77337460d7c2b0) Signed-off-by: Joonas Lahtinen --- drivers/gpu/drm/i915/display/intel_dp_mst.c | 3 +++ 1 file changed, 3 insertions(+) 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; } -- 2.49.0