From 9fb7e51d0bef9cc58a6425b7ba4e40c8f031f34a Mon Sep 17 00:00:00 2001 From: Sugar Zhang Date: Mon, 22 Oct 2018 10:02:39 +0800 Subject: [PATCH] ASoC: rockchip: pdm: adjust waterlevel in frame unit This patch make the waterlevel more reasonable, because the pdm controller share the single FIFO(128 entries) with each channel. adjust waterlevel in frame to meet the vad or dma frames request. Change-Id: I9b5808e55025347d435f47889f39ba34ac07ea1c Signed-off-by: Sugar Zhang --- sound/soc/rockchip/rockchip_pdm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c index 4ae9b5109161..987f06b4b779 100644 --- a/sound/soc/rockchip/rockchip_pdm.c +++ b/sound/soc/rockchip/rockchip_pdm.c @@ -255,8 +255,9 @@ static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream, regmap_update_bits(pdm->regmap, PDM_CTRL0, PDM_PATH_MSK | PDM_VDW_MSK, val); + /* all channels share the single FIFO */ regmap_update_bits(pdm->regmap, PDM_DMA_CTRL, PDM_DMA_RDL_MSK, - PDM_DMA_RDL(16)); + PDM_DMA_RDL(8 * params_channels(params))); return 0; }