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drm/i915/hdcp: debug logs for sink related failures 

Adding few more debug logs to identify the sink specific HDCP failures
along with a out of mem failure.

v2:
  Capturing the Bug and a-b

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110991
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
cc: Daniel Vetter <daniel@ffwll.ch>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190708113319.2517-1-ramalingam.c@intel.com
This commit is contained in:
Ramalingam C 2019-07-08 17:03:19 +05:30 committed by Uma Shankar
parent 4a5fdc962f
commit 4fb76782ad
1 changed files with 9 additions and 3 deletions
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12
drivers/gpu/drm/i915/display/intel_hdcp.c
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@ -523,12 +523,16 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector)
* authentication.
*/
num_downstream = DRM_HDCP_NUM_DOWNSTREAM(bstatus[0]);
if (num_downstream == 0)
if (num_downstream == 0) {
DRM_DEBUG_KMS("Repeater with zero downstream devices\n");
return -EINVAL;
}
ksv_fifo = kcalloc(DRM_HDCP_KSV_LEN, num_downstream, GFP_KERNEL);
if (!ksv_fifo)
if (!ksv_fifo) {
DRM_DEBUG_KMS("Out of mem: ksv_fifo\n");
return -ENOMEM;
}
ret = shim->read_ksv_fifo(intel_dig_port, num_downstream, ksv_fifo);
if (ret)
@ -1206,8 +1210,10 @@ static int hdcp2_authentication_key_exchange(struct intel_connector *connector)
if (ret < 0)
return ret;
if (msgs.send_cert.rx_caps[0] != HDCP_2_2_RX_CAPS_VERSION_VAL)
if (msgs.send_cert.rx_caps[0] != HDCP_2_2_RX_CAPS_VERSION_VAL) {
DRM_DEBUG_KMS("cert.rx_caps dont claim HDCP2.2\n");
return -EINVAL;
}
hdcp->is_repeater = HDCP_2_2_RX_REPEATER(msgs.send_cert.rx_caps[2]);