From 430f5da69b9323d5e7faca95bc30e61be4fcbbbf Mon Sep 17 00:00:00 2001 From: Sugar Zhang Date: Thu, 4 Apr 2019 11:56:29 +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. Signed-off-by: Sugar Zhang Signed-off-by: Mark Brown --- 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 3e1c5fd5b32b..955cdc2b8fc5 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; } -- 2.30.2