[PATCH 18/23] drm/i915/psr: Program Panel Replay CONFIG3 using AS SDP transmission time

Ankit Nautiyal
2026-04-02T08:20:21Z

Panel Replay requires the AS SDP transmission time to be written into
PANEL_REPLAY_CONFIG3. This field was previously not programmed.

Use the AS SDP transmission-time helper to populate CONFIG3.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
drivers/gpu/drm/i915/display/intel_psr.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 3fe7691c8b77..a9032b7ff814 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -783,6 +783,7 @@ static void _panel_replay_enable_sink(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state)
{
u8 panel_replay_config[2];
+ u8 panel_replay_config_3;

panel_replay_config[0] = DP_PANEL_REPLAY_ENABLE |
DP_PANEL_REPLAY_VSC_SDP_CRC_EN |
@@ -790,7 +791,6 @@ static void _panel_replay_enable_sink(struct intel_dp *intel_dp,
DP_PANEL_REPLAY_RFB_STORAGE_ERROR_EN |
DP_PANEL_REPLAY_ACTIVE_FRAME_CRC_ERROR_EN;
panel_replay_config[1] = DP_PANEL_REPLAY_CRC_VERIFICATION;
-
if (crtc_state->has_sel_update)
panel_replay_config[0] |= DP_PANEL_REPLAY_SU_ENABLE;

@@ -803,6 +803,9 @@ static void _panel_replay_enable_sink(struct intel_dp *intel_dp,

drm_dp_dpcd_write(&intel_dp->aux, PANEL_REPLAY_CONFIG,
panel_replay_config, sizeof(panel_replay_config));
+
+ panel_replay_config_3 = intel_dp_as_sdp_transmission_time();
+ drm_dp_dpcd_writeb(&intel_dp->aux, PANEL_REPLAY_CONFIG3, panel_replay_config_3);
}

static void _psr_enable_sink(struct intel_dp *intel_dp,
--
2.45.2