linux-kernel - Re: [PATCH v3 0/6] ASoC: q6apm: fix under runs and fragment sizes

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Message-ID: <Z8gULECJ463Ilv2p@hovoldconsulting.com>
Date: Wed, 5 Mar 2025 10:06:52 +0100
From: Johan Hovold <johan@...nel.org>
To: Srinivas Kandagatla <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 v3 0/6] ASoC: q6apm: fix under runs and fragment sizes

On Tue, Mar 04, 2025 at 06:19:53PM +0100, Johan Hovold wrote:
> On Tue, Mar 04, 2025 at 05:12:20PM +0000, Srinivas Kandagatla wrote:
> > On 04/03/2025 17:04, Johan Hovold wrote:
> 
> > > Unfortunately, this series still regresses Pulseaudio as capture is now
> > > choppy (e.g. when recording using parecord).
> > > 
> > > During our off-list debugging sessions you suggested reducing the max
> > > capture period size (that this series increases) to 6144 (same as min)
> > > and that fixed the Pulseaudio capture issue. In v3 the, the max period
> > > is again increased to 65536 which appears to break Pulseaudio capture.
> > 
> > I have verified pulseaudio on my side as well, the 64 byte alignment 
> > should have fixed the issue on the pulseaudio side.
> > 
> > Did you pick up the [PATCH v3 4/6] ASoC: qdsp6: q6apm-dai: set correct 
> > period and buffer alignment. patch in your tests?
> 
> Yes, I'm running with the full series applied. I tested PA on the X13s
> (and PW on the T14s).

I just tested PA on the T14s and it has the same problem with
choppy recording with this series applied.

As with the (amended) v2, setting the max capture period size to 6144
appears to make the problem go away.

Johan