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drivers: i2s: stm32 sai enable dma priority configuration #97871

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drivers: i2s: stm32 sai enable dma priority configuration #97871

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19 changes: 17 additions & 2 deletions drivers/i2s/i2s_stm32_sai.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,20 @@ enum mclk_divider {
MCLK_DIV_512
};

static const uint32_t dma_priority[] = {
#if defined(CONFIG_DMA_STM32_V1) || defined(CONFIG_DMA_STM32_V2)
DMA_PRIORITY_LOW,
DMA_PRIORITY_MEDIUM,
DMA_PRIORITY_HIGH,
DMA_PRIORITY_VERY_HIGH,
#else
DMA_LOW_PRIORITY_LOW_WEIGHT,
DMA_LOW_PRIORITY_MID_WEIGHT,
DMA_LOW_PRIORITY_HIGH_WEIGHT,
DMA_HIGH_PRIORITY,
#endif
};

struct queue_item {
void *buffer;
size_t size;
Expand Down Expand Up @@ -285,19 +299,18 @@ static int i2s_stm32_sai_dma_init(const struct device *dev)
hdma->Instance = STM32_DMA_GET_INSTANCE(stream->reg, stream->dma_channel);
hdma->Init.Request = dma_cfg.dma_slot;
hdma->Init.Mode = DMA_NORMAL;
hdma->Init.Priority = dma_priority[dma_cfg.channel_priority];

#if defined(CONFIG_SOC_SERIES_STM32H7X) || defined(CONFIG_SOC_SERIES_STM32L4X) || \
defined(CONFIG_SOC_SERIES_STM32G4X) || defined(CONFIG_SOC_SERIES_STM32L5X)
hdma->Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma->Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma->Init.Priority = DMA_PRIORITY_HIGH;
hdma->Init.PeriphInc = DMA_PINC_DISABLE;
hdma->Init.MemInc = DMA_MINC_ENABLE;
#else
hdma->Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;
hdma->Init.SrcDataWidth = DMA_SRC_DATAWIDTH_HALFWORD;
hdma->Init.DestDataWidth = DMA_DEST_DATAWIDTH_HALFWORD;
hdma->Init.Priority = DMA_HIGH_PRIORITY;
hdma->Init.SrcBurstLength = 1;
hdma->Init.DestBurstLength = 1;
hdma->Init.TransferAllocatedPort = DMA_SRC_ALLOCATED_PORT0 | DMA_DEST_ALLOCATED_PORT0;
Expand Down Expand Up @@ -822,6 +835,8 @@ static DEVICE_API(i2s, i2s_stm32_driver_api) = {
.dma_slot = STM32_DMA_SLOT(index, dir, slot), \
.channel_direction = src_dev##_TO_##dest_dev, \
.dma_callback = dma_callback, \
.channel_priority = STM32_DMA_CONFIG_PRIORITY( \
STM32_DMA_CHANNEL_CONFIG(index, dir)), \
}, \
.stream_start = stream_start, \
.queue_drop = queue_drop, \
Expand Down