linux-kernel - Re: [PATCH] ASoC: wm8962: Relax bit clock divider searching

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Message-ID: <CAEnQRZCvYe6n_8MFwfz_MyanJLqH2VAqkgcZ7K9NJkqBPg=r1A@mail.gmail.com>
Date:   Fri, 5 Mar 2021 14:43:08 +0200
From:   Daniel Baluta <daniel.baluta@...il.com>
To:     Shengjiu Wang <shengjiu.wang@....com>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, ckeepax@...nsource.cirrus.com,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Peter Ujfalusi <peter.ujfalusi@...com>, gustavoars@...nel.org,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        patches@...nsource.cirrus.com,
        Linux-ALSA <alsa-devel@...a-project.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: wm8962: Relax bit clock divider searching

On Fri, Mar 5, 2021 at 1:15 AM Shengjiu Wang <shengjiu.wang@....com> wrote:
>
> With S20_3LE format case, the sysclk = rate * 384,
> the bclk = rate * 20 * 2, there is no proper bclk divider
> for 384 / 40, because current condition needs exact match.
> So driver fails to configure the clocking:
>
> wm8962 3-001a: Unsupported BCLK ratio 9
>
> Fix this by relaxing bitclk divider searching, so that when
> no exact value can be derived from sysclk pick the closest
> value greater than expected bitclk.
>
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>

Reviewed-by: Daniel Baluta <daniel.baluta@....com>