[PATCH v2 4/7] ASoC: tegra: disable rx_fifo after disable stream

Ben Dooks
2019-09-23T16:20:23Z

We see odd FIFO overruns with this, we assume the best thing to do is
to disable the RX I2S frontend first, and then disable the FIFO that
is using it.

This also fixes an issue where using multi-word frames (TDM) have
partial samples stuck in the FIFO which then get read out when the
next capture is started.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
sound/soc/tegra/tegra30_i2s.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index 62377af53ca4..1cc43cdd0eee 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -236,9 +236,9 @@ static void tegra30_i2s_start_capture(struct tegra30_i2s *i2s)

static void tegra30_i2s_stop_capture(struct tegra30_i2s *i2s)
{
- tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
TEGRA30_I2S_CTRL_XFER_EN_RX, 0);
+ tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
}

static int tegra30_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
--
2.23.0