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b348150406
Add the DPCD flag to enable DSC passthrough in a last branch device, used in a follow-up i915 patch. Also add a flag to detect HBLANK expansion support in a branch device, used by a workaround in a follow-up i915 patch. 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/20231030155843.2251023-8-imre.deak@intel.com