[PATCH 1/2] ASoC: fsl_asrc: make sure the input and output clocks are different

[Arnaud Ferraris]

Le 16/07/2020 à 16:52, Arnaud Ferraris a écrit :
> The current clock selection algorithm might select the same clock for
> both input and output. This can happen when, for instance, the output
> sample rate is a multiple of the input rate.
> 
> This patch makes sure it always selects distinct input and output
> clocks.
> 
> Signed-off-by: Arnaud Ferraris <arnaud.ferraris at collabora.com>
> ---
>  sound/soc/fsl/fsl_asrc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
> index 02c81d2e34ad..bfd35b9c0781 100644
> --- a/sound/soc/fsl/fsl_asrc.c
> +++ b/sound/soc/fsl/fsl_asrc.c
> @@ -622,7 +622,8 @@ static void fsl_asrc_select_clk(struct fsl_asrc_priv *asrc_priv,
>  			clk_rate = clk_get_rate(asrc_priv->asrck_clk[clk_index]);
>  			/* Only match a perfect clock source with no remainder */
>  			if (clk_rate != 0 && (clk_rate / rate[j]) <= 1024 &&
> -			    (clk_rate % rate[j]) == 0)
> +			    (clk_rate % rate[j]) == 0 &&
> +			    (j == 0 || i != select_clk[j-1]))
>  				break;
>  		}
>  
> 

Well, it looks like I sent the wrong patch for this one, will send a v2
fixing this right now.
Sorry about the noise.

Regards,
Arnaud