linux-kernel - Re: [PATCH v3 07/25] ASoC: renesas: rz-ssi: Use only the proper amount of dividers

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Message-ID: <97049f44-cdcf-42be-aefb-c535bd7d0dbc@tuxon.dev>
Date: Mon, 9 Dec 2024 15:31:55 +0200
From: Claudiu Beznea <claudiu.beznea@...on.dev>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: mturquette@...libre.com, sboyd@...nel.org, robh@...nel.org,
 krzk+dt@...nel.org, conor+dt@...nel.org, biju.das.jz@...renesas.com,
 prabhakar.mahadev-lad.rj@...renesas.com, lgirdwood@...il.com,
 broonie@...nel.org, magnus.damm@...il.com, linus.walleij@...aro.org,
 perex@...ex.cz, tiwai@...e.com, p.zabel@...gutronix.de,
 linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-sound@...r.kernel.org, linux-gpio@...r.kernel.org,
 Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH v3 07/25] ASoC: renesas: rz-ssi: Use only the proper
 amount of dividers

Hi, Geert,

On 09.12.2024 15:22, Geert Uytterhoeven wrote:
> Hi Claudiu,
> 
> On Wed, Nov 13, 2024 at 2:36 PM Claudiu <claudiu.beznea@...on.dev> wrote:
>> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>>
>> There is no need to populate the ckdv[] with invalid dividers as that
>> part will not be indexed anyway. The ssi->audio_mck/bclk_rate should
>> always be >= 0.
>>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Thanks for your patch!
> 
>> --- a/sound/soc/renesas/rz-ssi.c
>> +++ b/sound/soc/renesas/rz-ssi.c
>> @@ -258,8 +258,7 @@ static void rz_ssi_stream_quit(struct rz_ssi_priv *ssi,
>>  static int rz_ssi_clk_setup(struct rz_ssi_priv *ssi, unsigned int rate,
>>                             unsigned int channels)
>>  {
>> -       static s8 ckdv[16] = { 1,  2,  4,  8, 16, 32, 64, 128,
>> -                              6, 12, 24, 48, 96, -1, -1, -1 };
>> +       static s8 ckdv[] = { 1,  2,  4,  8, 16, 32, 64, 128, 6, 12, 24, 48, 96 };
> 
> "u8", as 128 doesn't fit in s8 (why doesn't the compiler complain?).

Failed to notice that. Thank you for pointing it! I saw no compiler
complains, though.

Thank you,
Claudiu

> 
>>         unsigned int channel_bits = 32; /* System Word Length */
>>         unsigned long bclk_rate = rate * channels * channel_bits;
>>         unsigned int div;
> 
> The rest LGTM.
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
>