[PATCH v2] ASoC: mediatek: mt8188: Mark AFE_DAC_CON0 register as volatile

["yr.yang" <yr.yang@xxxxxxxxxxxx>]

From: YR Yang <yr.yang@xxxxxxxxxxxx>

Add AFE Control Register 0 to the volatile_register.
AFE_DAC_CON0 can be modified by both the SOF and ALSA drivers.
If this register is read and written in cache mode, the cached value
might not reflect the actual value when the register is modified by
another driver. It can cause playback or capture failures. Therefore,
it is necessary to add AFE_DAC_CON0 to the list of volatile registers.

Signed-off-by: YR Yang <yr.yang@xxxxxxxxxxxx>
---
Changes in v2:
- Modify commit message.
- Link to v1: https://patchwork.kernel.org/project/linux-mediatek/patch/20240801031030.31114-1-yr.yang@xxxxxxxxxxxx/
---
 sound/soc/mediatek/mt8188/mt8188-afe-pcm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/mediatek/mt8188/mt8188-afe-pcm.c b/sound/soc/mediatek/mt8188/mt8188-afe-pcm.c
index ccb6c1f3adc7..73e5c63aeec8 100644
--- a/sound/soc/mediatek/mt8188/mt8188-afe-pcm.c
+++ b/sound/soc/mediatek/mt8188/mt8188-afe-pcm.c
@@ -2748,6 +2748,7 @@ static bool mt8188_is_volatile_reg(struct device *dev, unsigned int reg)
 	case AFE_ASRC12_NEW_CON9:
 	case AFE_LRCK_CNT:
 	case AFE_DAC_MON0:
+	case AFE_DAC_CON0:
 	case AFE_DL2_CUR:
 	case AFE_DL3_CUR:
 	case AFE_DL6_CUR:
-- 
2.34.1