From 09a517954d19f0690eeb4d2ef4509cb73d18575b 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 432ffb435fe7..477fc6275359 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; }