linux-kernel - Re: [PATCH V3 3/8] soundwire: amd: register SoundWire manager dai ops

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Message-ID: <84a9fb4c-daf3-84ac-3946-f554a8d5d309@linux.intel.com>
Date:   Tue, 21 Feb 2023 18:48:38 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     "Mukunda,Vijendar" <vijendar.mukunda@....com>, vkoul@...nel.org
Cc:     alsa-devel@...a-project.org, amadeuszx.slawinski@...ux.intel.com,
        Mario.Limonciello@....com, Sunil-kumar.Dommati@....com,
        Basavaraj.Hiregoudar@....com, Mastan.Katragadda@....com,
        Arungopal.kondaveeti@....com,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V3 3/8] soundwire: amd: register SoundWire manager dai ops



On 2/21/23 16:05, Mukunda,Vijendar wrote:
> On 21/02/23 21:29, Pierre-Louis Bossart wrote:
>>
>>
>>> +static const struct snd_soc_dai_ops amd_sdw_dai_ops = {
>>> +	.hw_params = amd_sdw_hw_params,
>> don't you need a .prepare to deal with suspend-resume?
> DSP based solution is not implemented yet.
> As per our understanding In .prepare () callback, there is
> no extra logic needs to be implemented. Because of it,
> we have dropped .prepare() callback.

You don't need any logic IF the IP keeps its context while suspended.
That wasn't the case for us, we had to re-program the registers when
resuming.