linux-kernel - Re: [PATCH] ASoC: cpcap: Implement set_tdm

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Date:   Tue, 18 Feb 2020 16:44:25 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Peter Ujfalusi <peter.ujfalusi@...com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        "Arthur D ." <spinal.by@...il.com>,
        Merlijn Wajer <merlijn@...zup.org>,
        Pavel Machek <pavel@....cz>,
        Sebastian Reichel <sre@...nel.org>,
        Jarkko Nikula <jarkko.nikula@...mer.com>
Subject: Re: [PATCH] ASoC: cpcap: Implement set_tdm_slot for voice call
 support

On Tue, Feb 18, 2020 at 07:32:11AM -0800, Tony Lindgren wrote:
> * Peter Ujfalusi <peter.ujfalusi@...com> [200218 15:16]:

> > > Hmm does set_sysclk called from modem codec know that cpcap codec
> > > is the clock master based on bitclock-master and set the rate
> > > for cpcap codec?

> > Neither component should call set_sysclk, set_tdm_slots. The machine
> > driver should as it is the only one who know how things are wired...

> OK, but so what's the machine driver part in this case?

The machine driver is responsible for saying how everything is glued
together, both where the wires run and any policy decisions about how
the clocking tree should be arranged or TDM used.

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