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drivers: i2s: mcux_sai: fixed RX not completing end of stream

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RX FIFO watermark setting causing issue where last 16 words received
were stuck in FIFO, and not requesting DMA to move to buffer.  Fixed by
setting watermark to 0.

Signed-off-by: Derek Snell <derek.snell@nxp.com>
This commit is contained in:
Derek Snell 2022-02-25 12:35:56 -05:00 • committed by Carles Cufí
commit 4ff7df43a2
1 changed files with 3 additions and 0 deletions
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3
drivers/i2s/i2s_mcux_sai.c
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@ -604,6 +604,9 @@ static int i2s_mcux_config(const struct device *dev, enum i2s_dir dir,
dev_data->tx.dma_cfg.user_data = (void *)dev;
dev_data->tx.state = I2S_STATE_READY;
} else {
/* For RX, DMA reads from FIFO whenever data present */
config.fifo.fifoWatermark = 0;
memcpy(&dev_data->rx.cfg, i2s_cfg, sizeof(struct i2s_config));
LOG_DBG("rx slab free_list = 0x%x",
(uint32_t)i2s_cfg->mem_slab->free_list);