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drm/i915: debug log for REPLY_ACK missing

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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@intel.com>
Reviewed-by: Sean Paul <sean@poorly.run>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1544010283-20223-4-git-send-email-ramalingam.c@intel.com
This commit is contained in:
Ramalingam C 2018-12-05 17:14:42 +05:30 committed by Daniel Vetter
parent a0ea697a66
commit 4cf74aafc5
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/i915/intel_dp.c
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@ -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; 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, static int intel_dp_hdcp_read_bksv(struct intel_digital_port *intel_dig_port,