[PATCH 2/3] drm/i915: Include the AUX CH name in the debug messages

[Matt Roper]

On Thu, Jan 23, 2020 at 05:45:41PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> To make it easier to figure out what caused a particular debug
> message let's print out aux->name.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

It might be worth adding commas to some of these messages too while
we're at it (e.g., "not started, status").  But either way, this is a
really helpful cleanup.

Reviewed-by: Matt Roper <matthew.d.roper at intel.com>


> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 19 +++++++++++--------
>  1 file changed, 11 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 1795963e1866..941f0f6d55c1 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -1186,7 +1186,7 @@ intel_dp_aux_wait_done(struct intel_dp *intel_dp)
>  	trace_i915_reg_rw(false, ch_ctl, status, sizeof(status), true);
>  
>  	if (!done)
> -		DRM_ERROR("%s did not complete or timeout within %ums (status 0x%08x)\n",
> +		DRM_ERROR("%s: did not complete or timeout within %ums (status 0x%08x)\n",
>  			  intel_dp->aux.name, timeout_ms, status);
>  #undef C
>  
> @@ -1373,8 +1373,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  		const u32 status = intel_uncore_read(uncore, ch_ctl);
>  
>  		if (status != intel_dp->aux_busy_last_status) {
> -			WARN(1, "dp_aux_ch not started status 0x%08x\n",
> -			     status);
> +			WARN(1, "%s: not started status 0x%08x\n",
> +			     intel_dp->aux.name, status);
>  			intel_dp->aux_busy_last_status = status;
>  		}
>  
> @@ -1435,7 +1435,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  	}
>  
>  	if ((status & DP_AUX_CH_CTL_DONE) == 0) {
> -		DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
> +		DRM_ERROR("%s: not done status 0x%08x\n",
> +			  intel_dp->aux.name, status);
>  		ret = -EBUSY;
>  		goto out;
>  	}
> @@ -1445,7 +1446,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  	 * Timeouts occur when the sink is not connected
>  	 */
>  	if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
> -		DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
> +		DRM_ERROR("%s: receive error status 0x%08x\n",
> +			  intel_dp->aux.name, status);
>  		ret = -EIO;
>  		goto out;
>  	}
> @@ -1453,7 +1455,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  	/* Timeouts occur when the device isn't connected, so they're
>  	 * "normal" -- don't fill the kernel log with these */
>  	if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
> -		DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
> +		DRM_DEBUG_KMS("%s: timeout status 0x%08x\n",
> +			      intel_dp->aux.name, status);
>  		ret = -ETIMEDOUT;
>  		goto out;
>  	}
> @@ -1468,8 +1471,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  	 * drm layer takes care for the necessary retries.
>  	 */
>  	if (recv_bytes == 0 || recv_bytes > 20) {
> -		DRM_DEBUG_KMS("Forbidden recv_bytes = %d on aux transaction\n",
> -			      recv_bytes);
> +		DRM_DEBUG_KMS("%s: Forbidden recv_bytes = %d on aux transaction\n",
> +			      intel_dp->aux.name, recv_bytes);
>  		ret = -EBUSY;
>  		goto out;
>  	}
> -- 
> 2.24.1
> 
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-- 
Matt Roper
Graphics Software Engineer
VTT-OSGC Platform Enablement
Intel Corporation
(916) 356-2795