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.
v2:
Rewritten for readability [Sean Paul]
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
Reviewed-by: Sean Paul <sean@xxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 38a6e82153fd..9f75ca04a344 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5579,7 +5579,12 @@ 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;
+ if (reply != DP_AUX_NATIVE_REPLY_ACK) {
+ DRM_DEBUG_KMS("Aksv write: no DP_AUX_NATIVE_REPLY_ACK %x\n",
+ reply);
+ return -EIO;
+ }
+ return 0;
}
static int intel_dp_hdcp_read_bksv(struct intel_digital_port *intel_dig_port,
--
2.7.4
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