diff options
| author | Ramalingam C <ramalingam.c@intel.com> | 2018-12-05 17:14:42 +0530 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2018-12-06 09:17:09 +0100 |
| commit | 4cf74aafc55bef8725d1d30f7d3449fb86c1710f (patch) | |
| tree | 16d2a17e2521df77e85a370eb0d832c5eba0a17b | |
| parent | a0ea697a66497d68acbffb84d7bdaf2c92a89fe1 (diff) | |
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: 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
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index de4219721cbc2..e94faa0a42eb3 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -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, |