linux-kernel - Re: [PATCH v4 1/2] ASoC: amd: Add support for RT5682 codec in machine driver

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Message-ID: <20210318130020.GD5469@sirena.org.uk>
Date:   Thu, 18 Mar 2021 13:00:20 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Vijendar Mukunda <Vijendar.Mukunda@....com>
Cc:     alsa-devel@...a-project.org, shumingf@...ltek.com,
        flove@...ltek.com, derek.fang@...ltek.com,
        Alexander.Deucher@....com, Basavaraj.Hiregoudar@....com,
        Sunil-kumar.Dommati@....com, Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@....com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Chuhong Yuan <hslester96@...il.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/2] ASoC: amd: Add support for RT5682 codec in
 machine driver

On Thu, Mar 18, 2021 at 02:03:46AM +0530, Vijendar Mukunda wrote:
> +++ b/sound/soc/amd/acp-da7219-max98357a.c
> @@ -1,27 +1,8 @@
> -/*
> - * Machine driver for AMD ACP Audio engine using DA7219 & MAX98357 codec
> - *
> - * Copyright 2017 Advanced Micro Devices, Inc.

The conversion to SPDX really feels like it should at least be called
out in the changelog, and probably a separate change.

> +	/*
> +	 * Set wclk to 48000 because the rate constraint of this driver is
> +	 * 48000. ADAU7002 spec: "The ADAU7002 requires a BCLK rate that is
> +	 * minimum of 64x the LRCLK sample rate." RT5682 is the only clk
> +	 * source so for all codecs we have to limit bclk to 64X lrclk.
> +	 */
> +	clk_set_rate(rt5682_dai_wclk, 48000);
> +	clk_set_rate(rt5682_dai_bclk, 48000 * 64);

The driver should really check the return value of clk_set_rate(), it
can fail.

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