[alsa-devel] [PATCH] ASoC: avoid using divisible by 3 for DMIC clk

Few codecs will meet no DMIC clock output issue when select a divided number which is divisible by 3. To prevent this issue, the patch ignore the numbers when calculating the DMIC clock divider.

Signed-off-by: Bard Liao bardliao@realtek.com --- sound/soc/codecs/rl6231.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/sound/soc/codecs/rl6231.c b/sound/soc/codecs/rl6231.c index aca479f..18b4292 100644 --- a/sound/soc/codecs/rl6231.c +++ b/sound/soc/codecs/rl6231.c @@ -80,6 +80,8 @@ int rl6231_calc_dmic_clk(int rate) }

for (i = 0; i < ARRAY_SIZE(div); i++) { + if ((div[i] % 3) == 0) + continue; /* find divider that gives DMIC frequency below 3MHz */ if (3000000 * div[i] >= rate) return i;