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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 <sugar.zhang@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sugar Zhang 2019-04-04 11:56:29 +08:00 committed by Mark Brown
parent 2a050b7a74
commit 430f5da69b
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GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 1 deletions
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3
sound/soc/rockchip/rockchip_pdm.c
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@ -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;
}