From mboxrd@z Thu Jan 1 00:00:00 1970 From: olivier.moysan@st.com (Olivier Moysan) Date: Mon, 6 Nov 2017 16:18:52 +0100 Subject: [PATCH 1/2] ASoC: stm32: spdifrx: fix 16 bits capture In-Reply-To: <1509981533-28622-1-git-send-email-olivier.moysan@st.com> References: <1509981533-28622-1-git-send-email-olivier.moysan@st.com> Message-ID: <1509981533-28622-2-git-send-email-olivier.moysan@st.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Change DMA bus width to manage properly 16 bits packed format. Signed-off-by: Olivier Moysan --- sound/soc/stm/stm32_spdifrx.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/sound/soc/stm/stm32_spdifrx.c b/sound/soc/stm/stm32_spdifrx.c index 84cc567..d7dbe84 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, -- 1.9.1