6.12-stable review patch. If anyone has any objections, please let me know.
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From: Imre Deak imre.deak@intel.com
[ Upstream commit f2687d3cc9f905505d7b510c50970176115066a2 ]
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: 3257e55d3ea7 ("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 commit e109f644b871df8440c886a69cdce971ed533088) 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 --- drivers/gpu/drm/i915/display/intel_psr.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -591,6 +591,10 @@ static void _panel_replay_init_dpcd(stru { struct intel_display *display = to_intel_display(intel_dp);
+ /* TODO: Enable Panel Replay on MST once it's properly implemented. */ + if (intel_dp->mst_detect == DRM_DP_MST) + return; + if (intel_dp_is_edp(intel_dp)) { if (!intel_alpm_aux_less_wake_supported(intel_dp)) { drm_dbg_kms(display->drm,