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Commit 4cf74aaf authored by Ramalingam C's avatar Ramalingam C Committed by Daniel Vetter
Browse files

drm/i915: debug log for REPLY_ACK missing 



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: default avatarRamalingam C <ramalingam.c@intel.com>
Reviewed-by: default avatarSean Paul <sean@poorly.run>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1544010283-20223-4-git-send-email-ramalingam.c@intel.com
parent a0ea697a

drivers/gpu/drm/i915/intel_dp.c

+6 −1
Original line number Diff line number Diff line
@@ -5616,7 +5616,12 @@ 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,