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@intel.com --- 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,