ASoC: stm32: spdifrx: fix 16 bits capture

Change DMA bus width to manage properly 16 bits packed format.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/stm/stm32_spdifrx.c b/sound/soc/stm/stm32_spdifrx.c
index 84cc567..d7dbe84 100644 (file)
--- a/sound/soc/stm/stm32_spdifrx.c
+++ b/sound/soc/stm/stm32_spdifrx.c
@@ -750,17 +750,21 @@ static int stm32_spdifrx_hw_params(struct snd_pcm_substream *substream,
        switch (data_size) {
        case 16:
                fmt = SPDIFRX_DRFMT_PACKED;
-               spdifrx->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
                break;
        case 32:
                fmt = SPDIFRX_DRFMT_LEFT;
-               spdifrx->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
                break;
        default:
                dev_err(&spdifrx->pdev->dev, "Unexpected data format\n");
                return -EINVAL;
        }
 
+       /*
+        * Set buswidth to 4 bytes for all data formats.
+        * Packed format: transfer 2 x 2 bytes samples
+        * Left format: transfer 1 x 3 bytes samples + 1 dummy byte
+        */
+       spdifrx->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
        snd_soc_dai_init_dma_data(cpu_dai, NULL, &spdifrx->dma_params);
 
        return regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,