[PATCH v9 06/11] drm/i915/psr: HW will not allow PR on eDP when HDCP enabled

[Jouni Högander]

Take into account in Panel Replay compute config that  HW will not allow PR
on eDP when HDCP enabled.

v2: add debug message to print out why Panel Replay is not possible

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 9ff54f08b6ab..cd9755b7b550 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1520,6 +1520,9 @@ _panel_replay_compute_config(struct intel_dp *intel_dp,
 			     const struct drm_connector_state *conn_state)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	struct intel_connector *connector =
+		to_intel_connector(conn_state->connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
 
 	if (!CAN_PANEL_REPLAY(intel_dp))
 		return false;
@@ -1541,6 +1544,17 @@ _panel_replay_compute_config(struct intel_dp *intel_dp,
 		return false;
 	}
 
+	/* HW will not allow Panel Replay on eDP when HDCP enabled */
+	if (conn_state->content_protection ==
+	    DRM_MODE_CONTENT_PROTECTION_DESIRED ||
+	    (conn_state->content_protection ==
+	     DRM_MODE_CONTENT_PROTECTION_ENABLED && hdcp->value ==
+	     DRM_MODE_CONTENT_PROTECTION_UNDESIRED)) {
+		drm_dbg_kms(&i915->drm,
+			    "Panel Replay is not supported with HDCP\n");
+		return false;
+	}
+
 	return true;
 }
 
-- 
2.34.1