[PATCH 4/5] ASoC: dwc: Fix DMA fifo_size calculation
From: phucduc . bui
Date: Fri Nov 06 2026 - 06:54:33 EST
From: bui duc phuc <phucduc.bui@xxxxxxxxx>
fifo_size should be the FIFO size in bytes (depth * width / 8), but
the code shifts by 8 instead of 3. For capture the parentheses also
make it always 0.
Use depth * width / 8 for both directions.
Fixes: 52ea7c0543f8 ("ASoC: dwc: i2s: Add StarFive JH7110 SoC support")
Signed-off-by: bui duc phuc <phucduc.bui@xxxxxxxxx>
---
sound/soc/dwc/dwc-i2s.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c
index 0de7bcb2d0c5..1ff5b6f8864d 100644
--- a/sound/soc/dwc/dwc-i2s.c
+++ b/sound/soc/dwc/dwc-i2s.c
@@ -664,14 +664,14 @@ static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev,
idx2 = COMP1_TX_WORDSIZE_0(comp1);
dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
dev->play_dma_data.dt.fifo_size = dev->fifo_th * 2 *
- (fifo_width[idx2]) >> 8;
+ fifo_width[idx2] / 8;
dev->play_dma_data.dt.maxburst = 16;
}
if (COMP1_RX_ENABLED(comp1)) {
idx2 = COMP2_RX_WORDSIZE_0(comp2);
dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
dev->capture_dma_data.dt.fifo_size = dev->fifo_th * 2 *
- (fifo_width[idx2] >> 8);
+ fifo_width[idx2] / 8;
dev->capture_dma_data.dt.maxburst = 16;
}
} else {
@@ -711,7 +711,7 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
dev->capability |= DWC_I2S_PLAY;
dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
dev->play_dma_data.dt.fifo_size = fifo_depth *
- (fifo_width[idx2]) >> 8;
+ fifo_width[idx2] / 8;
dev->play_dma_data.dt.maxburst = 16;
}
if (COMP1_RX_ENABLED(comp1)) {
@@ -720,7 +720,7 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
dev->capability |= DWC_I2S_RECORD;
dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
dev->capture_dma_data.dt.fifo_size = fifo_depth *
- (fifo_width[idx2] >> 8);
+ fifo_width[idx2] / 8;
dev->capture_dma_data.dt.maxburst = 16;
}
--
2.43.0