Adding a debug log when the DP_AUX_NATIVE_REPLY_ACK is missing
for aksv write. This helps to locate the possible non responding
DP HDCP sinks.
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
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,
--
2.7.4
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