linux-kernel - RE: [PATCH v2 2/2] ASoC: Intel: Add period size constraint on strago board

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Date:   Thu, 30 Jul 2020 13:23:57 +0000
From:   "Lu, Brent" <brent.lu@...el.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
CC:     "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "Rojewski, Cezary" <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        "Takashi Iwai" <tiwai@...e.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Daniel Stuart <daniel.stuart14@...il.com>,
        Yu-Hsuan Hsu <yuhsuan@...omium.org>,
        "Guennadi Liakhovetski" <guennadi.liakhovetski@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Sam McNally <sammc@...omium.org>,
        "Damian van Soelen" <dj.vsoelen@...il.com>
Subject: RE: [PATCH v2 2/2] ASoC: Intel: Add period size constraint on strago
 board

> On Thu, Jul 30, 2020 at 04:13:35PM +0800, Brent Lu wrote:
> > From: Yu-Hsuan Hsu <yuhsuan@...omium.org>
> >
> > The CRAS server does not set the period size in hw_param so ALSA will
> > calculate a value for period size which is based on the buffer size
> > and other parameters. The value may not always be aligned with Atom's
> > dsp design so a constraint is added to make sure the board always has
> > a good value.
> >
> > Cyan uses chtmax98090 and others(banon, celes, edgar, kefka...) use
> > rt5650.
> 
> Actually one more comment here.
> Can you split per machine driver?
> 

It adds constraints on BSW Chromebooks for same purpose. I don't see the
benefit to split it.

Regards,
Brent
> >  sound/soc/intel/boards/cht_bsw_max98090_ti.c | 14 +++++++++++++-
> >  sound/soc/intel/boards/cht_bsw_rt5645.c      | 14 +++++++++++++-
> 
> --
> With Best Regards,
> Andy Shevchenko
>