linux-kernel - Re: [PATCH 1/1] ASoC: codecs: max98090: Allow dsp

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Message-ID: <b763d08e-f751-480c-96b6-339a53856768@sirena.org.uk>
Date:   Wed, 21 Jun 2023 14:18:32 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Maxim Kochetkov <fido_max@...ox.ru>
Cc:     alsa-devel@...a-project.org, Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] ASoC: codecs: max98090: Allow dsp_a mode

On Wed, Jun 21, 2023 at 04:02:34PM +0300, Maxim Kochetkov wrote:
> On 21.06.2023 15:26, Mark Brown wrote:

> > This is configuring DSP A identically to left justified mode, it looks
> > like the format configuration needs at least some interlock with the TDM
> > configuration.

> According to datasheet MAX98090 supports only DSP_A (L data MSB after FRM
> LRC) TDM mode. Allowing this mode will let us proper configure CPU audio
> node via DT. Actual TDM mode activation is performed in
> max98090_set_tdm_slot() via M98090_REG_TDM_FORMAT/M98090_REG_TDM_CONTROL
> registers.

I'm saying there should be some interlock between these two settings, if
nothing else setting DSP A mode should force TDM mode with automatically
configured slot sizes.

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