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ASoC: fsl_sai: fix 1:1 bclk:mclk ratio support

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Refactoring in commit a50b7926d0 ("ASoC: fsl_sai: implement 1:1
bclk:mclk ratio support") led to the bypass never happening
as (ratio = 1) was caught in the existing if (ratio & 1) continue;
check. The correct check sequence instead is:

 - skip all ratios lower than one and higher than 512
 - skip all odd ratios except for 1:1
 - skip 1:1 ratio if and only if !support_1_1_ratio

And for all others, calculate the appropriate divider. Adjust the
code to facilitate this.

Fixes: a50b7926d0 ("ASoC: fsl_sai: implement 1:1 bclk:mclk ratio support")
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20220405155731.745413-1-a.fatoum@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ahmad Fatoum 2022-04-05 17:57:31 +02:00 committed by Mark Brown
parent 51a630a705
commit d00887c106
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1 changed files with 1 additions and 1 deletions
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2
sound/soc/fsl/fsl_sai.c
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@ -372,7 +372,7 @@ static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq)
continue;
if (ratio == 1 && !support_1_1_ratio)
continue;
else if (ratio & 1)
if ((ratio & 1) && ratio > 1)
continue;
diff = abs((long)clk_rate - ratio * freq);