drm/i915/hdcp: debugs logs for sink related failures

Submitted by Ramalingam C on July 4, 2019, 3:08 a.m.

Details

Message ID 20190704030831.17266-1-ramalingam.c@intel.com
State Accepted
Commit 4fb76782ad012d657df51f437a0dfcebce6aea53
Headers show
Series "drm/i915/hdcp: debugs logs for sink related failures" ( rev: 1 ) in Intel GFX

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Commit Message

Ramalingam C July 4, 2019, 3:08 a.m.
Adding few more debug logs to identify the sink specific HDCP failures
along with a out of mem.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
cc: Daniel Vetter <daniel@ffwll.ch>
---
 drivers/gpu/drm/i915/display/intel_hdcp.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

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diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index bc3a94d491c4..a78139f9e847 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -523,12 +523,16 @@  int intel_hdcp_auth_downstream(struct intel_connector *connector)
 	 * authentication.
 	 */
 	num_downstream = DRM_HDCP_NUM_DOWNSTREAM(bstatus[0]);
-	if (num_downstream == 0)
+	if (num_downstream == 0) {
+		DRM_DEBUG_KMS("Repeater with zero downstream devices\n");
 		return -EINVAL;
+	}
 
 	ksv_fifo = kcalloc(DRM_HDCP_KSV_LEN, num_downstream, GFP_KERNEL);
-	if (!ksv_fifo)
+	if (!ksv_fifo) {
+		DRM_DEBUG_KMS("Out of mem: ksv_fifo\n");
 		return -ENOMEM;
+	}
 
 	ret = shim->read_ksv_fifo(intel_dig_port, num_downstream, ksv_fifo);
 	if (ret)
@@ -1206,8 +1210,10 @@  static int hdcp2_authentication_key_exchange(struct intel_connector *connector)
 	if (ret < 0)
 		return ret;
 
-	if (msgs.send_cert.rx_caps[0] != HDCP_2_2_RX_CAPS_VERSION_VAL)
+	if (msgs.send_cert.rx_caps[0] != HDCP_2_2_RX_CAPS_VERSION_VAL) {
+		DRM_DEBUG_KMS("cert.rx_caps dont claim HDCP2.2\n");
 		return -EINVAL;
+	}
 
 	hdcp->is_repeater = HDCP_2_2_RX_REPEATER(msgs.send_cert.rx_caps[2]);