linux-kernel - Re: [PATCH] ASoC: wm_adsp: Dump DSP

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Message-ID: <20150528161313.GB19558@opensource.wolfsonmicro.com>
Date:	Thu, 28 May 2015 17:13:13 +0100
From:	Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	patches@...nsource.wolfsonmicro.com, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: wm_adsp: Dump DSP_SCRATCH1 on DSP shutdown

On Thu, May 28, 2015 at 03:37:24PM +0100, Mark Brown wrote:
> On Thu, May 28, 2015 at 03:24:39PM +0100, Richard Fitzgerald wrote:
> > On Thu, May 28, 2015 at 02:57:51PM +0100, Mark Brown wrote:
> 
> > > > -		adsp_dbg(dsp, "Shutdown complete\n");
> > > > +		adsp_info(dsp, "Shutdown complete (SCRATCH1:0x%x)\n", scratch1);
> 
> > > That seems a bit loud for a diagnostic message, why raise the severity?
> 
> > It's a diagnostic of the firmware, not the driver, and we can't assume that
> > people trying to use a firmware have the ability to build and flash a kernel
> > with a debug version of the driver
> 
> The default is that dev_dbg() is available in dmesg but not on the
> console which usually seems like a reasonable balance for this sort of
> thing - it's there if people want it but not included in the default
> logging.

What you're describing seems to be the default for dev_info().
For me I don't get any dev_dbg() output in the dmesg log unless the source
file has a #define DEBUG at the top.
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