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>

1 files changed, 6 insertions, 2 deletions

diff --git a/sound/soc/stm/stm32_spdifrx.c b/sound/soc/stm/stm32_spdifrx.c
index 84cc5678beba..d7dbe84d5eeb 100644
--- 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,