On Tue, Nov 27, 2018 at 07:32:58PM +0530, Ramalingam C wrote:
> 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@xxxxxxxxx>
> ---
> 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");
This is pretty hard to read. Could you please change to:
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;
With this change,
Reviewed-by: Sean Paul <sean@xxxxxxxxxx>
> +
> + return ret;
> }
>
> static int intel_dp_hdcp_read_bksv(struct intel_digital_port *intel_dig_port,
> --
> 2.7.4
>
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--
Sean Paul, Software Engineer, Google / Chromium OS
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