On 6/8/2026 7:41 PM, Jouni Högander wrote:
DP Panel Replay spec mentions FEC needs to be enabled when using Panel
Replay. Check support for FEC and disable Panel Replay if not supported.
This matches the spec : FEC is mandatory for DP PR, but optional for eDP PR.
Confirmed against both eDP and DP specs.
Reviewed-by: Ankit Nautiyal <[email protected]>
Signed-off-by: Jouni Högander <[email protected]>
---
drivers/gpu/drm/i915/display/intel_psr.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
b/drivers/gpu/drm/i915/display/intel_psr.c
index e138982dc91f6..ad2f6c79f5808 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1851,8 +1851,15 @@ static bool _panel_replay_compute_config(struct
intel_crtc_state *crtc_state,
crtc_state->link_off_after_as_sdp_when_pr_active =
compute_link_off_after_as_sdp_when_pr_active(connector);
crtc_state->disable_as_sdp_when_pr_active =
compute_disable_as_sdp_when_pr_active(connector);
- if (!intel_dp_is_edp(intel_dp))
+ if (!intel_dp_is_edp(intel_dp)) {
+ if (!intel_dp_supports_fec(intel_dp, connector, crtc_state)) {
+ drm_dbg_kms(display->drm,
+ "Panel Replay not enabled because FEC not
supported\n");
+ return false;
+ }
+
return true;
+ }
/* Remaining checks are for eDP only */
