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

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Thu, Jan 23, 2020 at 09:19:04AM -0800, Matt Roper wrote:
> On Thu, Jan 23, 2020 at 05:45:41PM +0200, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala@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@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.

Good idea. The first one of these already uses
"%s: blah (status 0x%x)" as the format, so I went ahead and
converted the rest to follow the same style.

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

2-3 pushed to dinq. Thanks for the review.

> 
> 
> > ---
> >  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
> > 
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 
> -- 
> Matt Roper
> Graphics Software Engineer
> VTT-OSGC Platform Enablement
> Intel Corporation
> (916) 356-2795

-- 
Ville Syrjälä
Intel
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