[PATCH v4 07/19] drm/i915/psr: Check panel ALPM capability for eDP Panel Replay

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

Our HW doesn't support Panel Replay without AUX_LESS ALPM on eDP. Check
panel support for this and prevent eDP panel replay if it doesn't exits.

Bspec: 68920

v2: use intel_alpm_aux_less_wake_supported

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 05aff2adb19e..7fb14d740d31 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -561,6 +561,13 @@ static void _panel_replay_init_dpcd(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 
+	if (intel_dp_is_edp(intel_dp) &&
+	    (!intel_alpm_aux_less_wake_supported(intel_dp))) {
+		drm_dbg_kms(&i915->drm,
+			    "Panel doesn't support AUX-less ALPM, eDP Panel Replay not possible\n");
+		return;
+	}
+
 	intel_dp->psr.sink_panel_replay_support = true;
 
 	if (intel_dp->pr_dpcd & DP_PANEL_REPLAY_SU_SUPPORT)
-- 
2.34.1