[PATCH] ASoC: fsl_sai: fix 1:1 bclk:mclk ratio support

[Ahmad Fatoum]

Refactoring in commit a50b7926d015 ("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: a50b7926d015 ("ASoC: fsl_sai: implement 1:1 bclk:mclk ratio support")
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 sound/soc/fsl/fsl_sai.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index a992d51568cc..50c377f16097 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -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);
-- 
2.30.2