[v8,01/35] drm/i915: debug log for REPLY_ACK missing

Submitted by Ramalingam C on Nov. 27, 2018, 10:42 a.m.

Details

Message ID 1543315413-24302-2-git-send-email-ramalingam.c@intel.com
State New
Headers show
Series "drm/i915: Implement HDCP2.2" ( rev: 10 ) in Intel GFX

Not browsing as part of any series.

Commit Message

Ramalingam C Nov. 27, 2018, 10:42 a.m.
Adding a DRM_DEBUG log when the DP_AUX_NATIVE_REPLY_ACK is missing
for aksv write.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 70ae3d57316b..18e3a5a3d873 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5390,7 +5390,11 @@  int intel_dp_hdcp_write_an_aksv(struct intel_digital_port *intel_dig_port,
 	}
 
 	reply = (rxbuf[0] >> 4) & DP_AUX_NATIVE_REPLY_MASK;
-	return reply == DP_AUX_NATIVE_REPLY_ACK ? 0 : -EIO;
+	ret = reply == DP_AUX_NATIVE_REPLY_ACK ? 0 : -EIO;
+	if (ret)
+		DRM_DEBUG_KMS("Aksv write: DP_AUX_NATIVE_REPLY_ACK missing\n");
+
+	return ret;
 }
 
 static int intel_dp_hdcp_read_bksv(struct intel_digital_port *intel_dig_port,