drm/i915/mst: Limit MST+DSC to TGL+

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The MST code currently assumes that glk+ already supports MST+DSC,
which is incorrect. We need to check for TGL+ actually. ICL does
support SST+DSC, but supposedly it can't do MST+FEC which will
also rule out MST+DSC.

Note that a straight TGL+ check doesn't work here because DSC
support can get fused out, so we do need to also check 'has_dsc'.

Cc: stable@vger.kernel.org
Fixes: d51f25eb47 ("drm/i915: Add DSC support to MST path")
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240402135148.23011-6-ville.syrjala@linux.intel.com
(cherry picked from commit c9c92f286d)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Ville Syrjälä 2024-04-02 16:51:46 +03:00 • committed by Rodrigo Vivi

parent f7caddfd55

commit 51bc63392e

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2 changed files with 2 additions and 1 deletions

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1

drivers/gpu/drm/i915/display/intel_display_device.h

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2

drivers/gpu/drm/i915/display/intel_dp_mst.c

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