* [PATCH AUTOSEL 6.1 28/47] ASoC: atmel: Fix the 8K sample parameter in I2SC master
[not found] <20230813160006.1073695-1-sashal@kernel.org>
@ 2023-08-13 15:59 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2023-08-13 15:59 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, alexandre.belloni, Guiting Shen, alsa-devel, tiwai,
lgirdwood, perex, Mark Brown, claudiu.beznea, linux-arm-kernel
From: Guiting Shen <aarongt.shen@gmail.com>
[ Upstream commit f85739c0b2b0d98a32f5ca4fcc5501d2b76df4f6 ]
The 8K sample parameter of 12.288Mhz main system bus clock doesn't work
because the I2SC_MR.IMCKDIV must not be 0 according to the sama5d2
series datasheet(I2SC Mode Register of Register Summary).
So use the 6.144Mhz instead of 12.288Mhz to support 8K sample.
Signed-off-by: Guiting Shen <aarongt.shen@gmail.com>
Link: https://lore.kernel.org/r/20230715030620.62328-1-aarongt.shen@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/atmel/atmel-i2s.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sound/soc/atmel/atmel-i2s.c b/sound/soc/atmel/atmel-i2s.c
index 425d66edbf867..5e43ff0b537a3 100644
--- a/sound/soc/atmel/atmel-i2s.c
+++ b/sound/soc/atmel/atmel-i2s.c
@@ -163,11 +163,14 @@ struct atmel_i2s_gck_param {
#define I2S_MCK_12M288 12288000UL
#define I2S_MCK_11M2896 11289600UL
+#define I2S_MCK_6M144 6144000UL
/* mck = (32 * (imckfs+1) / (imckdiv+1)) * fs */
static const struct atmel_i2s_gck_param gck_params[] = {
+ /* mck = 6.144Mhz */
+ { 8000, I2S_MCK_6M144, 1, 47}, /* mck = 768 fs */
+
/* mck = 12.288MHz */
- { 8000, I2S_MCK_12M288, 0, 47}, /* mck = 1536 fs */
{ 16000, I2S_MCK_12M288, 1, 47}, /* mck = 768 fs */
{ 24000, I2S_MCK_12M288, 3, 63}, /* mck = 512 fs */
{ 32000, I2S_MCK_12M288, 3, 47}, /* mck = 384 fs */
--
2.40.1
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