Unverified Commit 430f5da6 authored Apr 04, 2019 by Sugar Zhang Committed by Mark Brown Apr 04, 2019

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>

parent 2a050b7a

sound/soc/rockchip/rockchip_pdm.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}

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