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[ Upstream commitf2687d3cc9] Disable Panel Replay on MST links until it's properly implemented. For instance the required VSC SDP is not programmed on MST and FEC is not enabled if Panel Replay is enabled. Fixes:3257e55d3e("drm/i915/panelreplay: enable/disable panel replay") Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/15174 Cc: Jouni Högander <jouni.hogander@intel.com> Cc: Animesh Manna <animesh.manna@intel.com> Cc: stable@vger.kernel.org # v6.8+ Reviewed-by: Jouni Högander <jouni.hogander@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patch.msgid.link/20251107124141.911895-1-imre.deak@intel.com (cherry picked from commite109f644b8) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> [ placed MST check at function start since DPCD read was moved to caller ] Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>