linux-kernel - Re: [PATCH] ASoC: cs35l41: Add 12288000 clk freq to cs35l41_fs

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Message-ID: <0cea5741-96f2-4691-07bb-a7c12363eb01@opensource.cirrus.com>
Date:   Mon, 20 Mar 2023 14:38:59 -0500
From:   "Rhodes, David" <drhodes@...nsource.cirrus.com>
To:     Jianhua Lu <lujianhua000@...il.com>,
        James Schulman <james.schulman@...rus.com>,
        David Rhodes <david.rhodes@...rus.com>,
        "Lucas Tanure" <tanureal@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
CC:     <alsa-devel@...a-project.org>, <patches@...nsource.cirrus.com>,
        <linux-kernel@...r.kernel.org>,
        <~postmarketos/upstreaming@...ts.sr.ht>,
        <phone-devel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: cs35l41: Add 12288000 clk freq to cs35l41_fs_mon
 clk config

On 3/18/23 9:14 AM, Jianhua Lu wrote:
> There are 8 cs35l41 speaker amplifier connected to TDM
> in my Xiaomi Mi Pad 5 Pro tablet. In this case, it's necessary
> to set 12288000 (48000 * 32 * 8) clk freq for it.
> 
> rate=48000, slot_width=32, slots=8.
> 
> Signed-off-by: Jianhua Lu <lujianhua000@...il.com>
> ---
>   sound/soc/codecs/cs35l41.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c
> index 9ec01a5f09ca..6ac501f008ec 100644
> --- a/sound/soc/codecs/cs35l41.c
> +++ b/sound/soc/codecs/cs35l41.c
> @@ -150,6 +150,7 @@ static const struct cs35l41_fs_mon_config cs35l41_fs_mon[] = {
>   	{ 5644800,	16,	24 },
>   	{ 6000000,	16,	24 },
>   	{ 6144000,	16,	24 },
> +	{ 12288000,	0,	0 },
>   };
>   
>   static int cs35l41_get_fs_mon_config_index(int freq)

This is a valid clocking configuration. 12.288 MHz is already available 
in cs35l41_pll_sysclk[] as well.
Values for fs1 and fs2 are not required because cs35l41_dai_set_sysclk() 
will use hardcoded values for freq > 6.144 MHz.

Reviewed-by: David Rhodes <David.Rhodes@...rus.com>

Thanks,
David