From: Imre Deak Date: Fri, 21 Nov 2025 15:20:15 +0000 (-0500) Subject: drm/i915/dp_mst: Disable Panel Replay X-Git-Tag: v6.17.10~14 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=adef9314480670a357a694ebb38c6c4f82a84104;p=thirdparty%2Fkernel%2Fstable.git drm/i915/dp_mst: Disable Panel Replay [ 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 Cc: Animesh Manna Cc: stable@vger.kernel.org # v6.8+ Reviewed-by: Jouni Högander Signed-off-by: Imre Deak Link: https://patch.msgid.link/20251107124141.911895-1-imre.deak@intel.com (cherry picked from commit e109f644b871df8440c886a69cdce971ed533088) Signed-off-by: Rodrigo Vivi Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index ba80f8b36cd78..179b7d27eb4c4 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -602,6 +602,10 @@ static void _panel_replay_init_dpcd(struct intel_dp *intel_dp) struct intel_display *display = to_intel_display(intel_dp); int ret; + /* TODO: Enable Panel Replay on MST once it's properly implemented. */ + if (intel_dp->mst_detect == DRM_DP_MST) + return; + ret = drm_dp_dpcd_read_data(&intel_dp->aux, DP_PANEL_REPLAY_CAP_SUPPORT, &intel_dp->pr_dpcd, sizeof(intel_dp->pr_dpcd)); if (ret < 0)