[alsa-devel] [PATCH] ASoC: rl6231: fix range of DMIC clock
John Lin
john.lin at realtek.com
Mon Nov 16 07:41:07 CET 2015
The maximum DMIC clock rate is 3.072 MHz for most DMIC. And it will get better
performance in higher clock rate. If we set maximum to 3 MHz in driver, we will
get a clock rate which is not even close to 3 MHz.
For example, if DMIC clock source is 24.576 MHz, the DMIC clock will be about
1.5 MHz in current code. But it will be 3.072 MHz with this patch.
Signed-off-by: John Lin <john.lin at realtek.com>
---
sound/soc/codecs/rl6231.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/rl6231.c b/sound/soc/codecs/rl6231.c
index 18b4292..1dc68ab 100644
--- a/sound/soc/codecs/rl6231.c
+++ b/sound/soc/codecs/rl6231.c
@@ -82,8 +82,8 @@ 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)
+ /* find divider that gives DMIC frequency below 3.072MHz */
+ if (3072000 * div[i] >= rate)
return i;
}
--
1.8.1.1.439.g50a6b54
More information about the Alsa-devel
mailing list