drm/i915/psr: Compute Panel Replay/Adaptive Sync coexistence behavior

Currently we are checking Panel Replay capability DPCD register in
intel_alpm.c and writing PR_ALPM_CTL_ALLOW_LINK_OFF_BETWEEN_AS_SDP_AND_SU
and PR_ALPM_CTL_AS_SDP_TRANSMISSION_IN_ACTIVE_DISABLE in PR_ALPM_CTL
register base on the informaion. Instead of directly accessing
intel_dp->pr_dpcd compute the behavior during psr_compute_config and store
it in intel_crtc_state.

v2:
  - inline added helpers
  - use intel_dp_attached_dp instead of passing as a parameter

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251204104733.1106145-4-jouni.hogander@intel.com

3 files changed, 24 insertions, 11 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c
index 6372f533f65b..7ce8c674bb03 100644
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -326,11 +326,9 @@ static void lnl_alpm_configure(struct intel_dp *intel_dp,
 		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)
+			if (crtc_state->link_off_after_as_sdp_when_pr_active)
 				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))
+			if (crtc_state->disable_as_sdp_when_pr_active)
 				pr_alpm_ctl |= PR_ALPM_CTL_AS_SDP_TRANSMISSION_IN_ACTIVE_DISABLE;
 
 			intel_de_write(display, PR_ALPM_CTL(display, cpu_transcoder),
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 565d179f8780..8584292d09f5 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1162,6 +1162,8 @@ struct intel_crtc_state {
 	bool enable_psr2_su_region_et;
 	bool req_psr2_sdp_prior_scanline;
 	bool has_panel_replay;
+	bool link_off_after_as_sdp_when_pr_active;
+	bool disable_as_sdp_when_pr_active;
 	bool wm_level_disabled;
 	bool pkg_c_latency_used;
 	/* Only used for state verification. */
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 417a6cd2fca9..c95d1e5724c3 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1708,14 +1708,25 @@ static bool _psr_compute_config(struct intel_dp *intel_dp,
 	return true;
 }
 
-static bool
-_panel_replay_compute_config(struct intel_dp *intel_dp,
-			     struct intel_crtc_state *crtc_state,
-			     const struct drm_connector_state *conn_state)
+static inline bool compute_link_off_after_as_sdp_when_pr_active(struct intel_dp *intel_dp)
+{
+	return (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);
+}
+
+static inline bool compute_disable_as_sdp_when_pr_active(struct intel_dp *intel_dp)
+{
+	return !(intel_dp->pr_dpcd[INTEL_PR_DPCD_INDEX(DP_PANEL_REPLAY_CAP_CAPABILITY)] &
+		 DP_PANEL_REPLAY_ASYNC_VIDEO_TIMING_NOT_SUPPORTED_IN_PR);
+}
+
+static bool _panel_replay_compute_config(struct intel_crtc_state *crtc_state,
+					 const struct drm_connector_state *conn_state)
 {
-	struct intel_display *display = to_intel_display(intel_dp);
 	struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
+	struct intel_dp *intel_dp = intel_attached_dp(connector);
+	struct intel_display *display = to_intel_display(intel_dp);
 	struct intel_hdcp *hdcp = &connector->hdcp;
 
 	if (!CAN_PANEL_REPLAY(intel_dp))
@@ -1740,6 +1751,9 @@ _panel_replay_compute_config(struct intel_dp *intel_dp,
 		return false;
 	}
 
+	crtc_state->link_off_after_as_sdp_when_pr_active = compute_link_off_after_as_sdp_when_pr_active(intel_dp);
+	crtc_state->disable_as_sdp_when_pr_active = compute_disable_as_sdp_when_pr_active(intel_dp);
+
 	if (!intel_dp_is_edp(intel_dp))
 		return true;
 
@@ -1847,8 +1861,7 @@ void intel_psr_compute_config(struct intel_dp *intel_dp,
 
 	/* Only used for state verification. */
 	crtc_state->panel_replay_dsc_support = intel_dp->psr.sink_panel_replay_dsc_support;
-	crtc_state->has_panel_replay = _panel_replay_compute_config(intel_dp,
-								    crtc_state,
+	crtc_state->has_panel_replay = _panel_replay_compute_config(crtc_state,
 								    conn_state);
 
 	crtc_state->has_psr = crtc_state->has_panel_replay ? true :