[PATCH v4 05/12] drm/i915/alpm: Write PR_ALPM_CTL register

["Jouni Högander" <jouni.hogander@intel.com>]

PR_ALPM_CTL register contains configurations related to Adaptive sync
sdp. Configure these if Adaptive Sync SDP is supported.

v2: avoid using hardcoded indices

Bspec: 71014
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_alpm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c
index c176bdbc19a3..0890247085a7 100644
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -348,6 +348,20 @@ static void lnl_alpm_configure(struct intel_dp *intel_dp,
 			ALPM_CTL_AUX_LESS_SLEEP_HOLD_TIME_50_SYMBOLS |
 			ALPM_CTL_AUX_LESS_WAKE_TIME(intel_dp->alpm_parameters.aux_less_wake_lines);
 
+		if (intel_dp->as_sdp_supported) {
+			u32 pr_alpm_ctl = PR_ALPM_CTL_ADAPTIVE_SYNC_SDP_POSITION_T1;
+
+			if (intel_dp->pr_dpcd[INTEL_PR_DPCD_INDEX(DP_PANEL_REPLAY_CAP_CAPABILITY)] &
+			    DP_PANEL_REPLAY_LINK_OFF_SUPPORTED_IN_PR_AFTER_ADAPTIVE_SYNC_SDP)
+				pr_alpm_ctl |= PR_ALPM_CTL_ALLOW_LINK_OFF_BETWEEN_AS_SDP_AND_SU;
+			if (!(intel_dp->pr_dpcd[INTEL_PR_DPCD_INDEX(DP_PANEL_REPLAY_CAP_CAPABILITY)] &
+						DP_PANEL_REPLAY_ASYNC_VIDEO_TIMING_NOT_SUPPORTED_IN_PR))
+				pr_alpm_ctl |= PR_ALPM_CTL_AS_SDP_TRANSMISSION_IN_ACTIVE_DISABLE;
+
+			intel_de_write(display, PR_ALPM_CTL(display, cpu_transcoder),
+				       pr_alpm_ctl);
+		}
+
 		intel_de_write(display,
 			       PORT_ALPM_CTL(port),
 			       PORT_ALPM_CTL_ALPM_AUX_LESS_ENABLE |
-- 
2.43.0