linux-kernel - Re: [PATCH v2 0/5] ASoC: q6apm: fix under runs and fragment sizes

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Message-ID: <Z7hAfGHvdeWpZ4Y3@hovoldconsulting.com>
Date: Fri, 21 Feb 2025 09:59:40 +0100
From: Johan Hovold <johan@...nel.org>
To: srinivas.kandagatla@...aro.org
Cc: broonie@...nel.org, perex@...ex.cz, tiwai@...e.com,
	krzysztof.kozlowski@...aro.org, linux-sound@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	dmitry.baryshkov@...aro.org, johan+linaro@...nel.org
Subject: Re: [PATCH v2 0/5] ASoC: q6apm: fix under runs and fragment sizes

On Fri, Feb 21, 2025 at 09:29:39AM +0100, Johan Hovold wrote:
> On Thu, Feb 20, 2025 at 06:38:11PM +0100, Johan Hovold wrote:
> > On Thu, Feb 20, 2025 at 04:28:42PM +0000, Srinivas Kandagatla wrote:
> 
> > > On Qualcomm Audioreach setup, some of the audio artifacts are seen in
> > > both recording and playback. These patches fix issues by
> > > 1. Adjusting the fragment size that dsp can service.
> > > 2. schedule available playback buffers in time for dsp to not hit under runs 
> > > 3. remove some of the manual calculations done to get hardware pointer.
> > > 
> > > With these patches, am able to see Audio quality improvements.
> > > 
> > > Any testing would be appreciated.
> > 
> > With this series, the choppy (robotic) capture when using pipewire
> > appears to be fixed (pulseaudio worked before).
> > 
> > Playback is still choppy (heavily distorted), though, and now it also
> > appears to be too slow.
> > 
> > I tested using pw-record and pw-play (and mpv) on the T14s (6.14-rc3).
> 
> Retested this morning and realised that playback is only choppy (and too
> slow) while I have pavucontrol open. That would be nice to fix if
> possible, but this is still a great improvement since pipewire was not
> usable at all before these changes.
> 
> Tested-by: Johan Hovold <johan+linaro@...nel.org>

Hmm... Scratch that.

This series apparently breaks pulseaudio instead.

Too fast playback on the T14s with mpv, and after I stopped it I wasn't
able too play any audio anymore. And systemd complains about a stop job
running for long when rebooting. Similar issues on the X13s.

Johan