[PATCH v1 07/20] ASoC: tegra20: spdif: Set FIFO trigger level
From: Dmitry Osipenko <digetx@gmail.com>
Date: 2021-11-24 22:06:49
Also in:
alsa-devel, linux-tegra, lkml
Subsystem:
sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds
Program FIFO trigger level properly to fix x4 accelerated playback. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- sound/soc/tegra/tegra20_spdif.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/sound/soc/tegra/tegra20_spdif.c b/sound/soc/tegra/tegra20_spdif.c
index bd81df5378d1..6650875d2555 100644
--- a/sound/soc/tegra/tegra20_spdif.c
+++ b/sound/soc/tegra/tegra20_spdif.c@@ -70,6 +70,14 @@ static int tegra20_spdif_hw_params(struct snd_pcm_substream *substream, regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL, mask, val); + /* + * FIFO trigger level must be bigger than DMA burst or equal to it, + * otherwise data is discarded on overflow. + */ + regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_DATA_FIFO_CSR, + TEGRA20_SPDIF_DATA_FIFO_CSR_TX_ATN_LVL_MASK, + TEGRA20_SPDIF_DATA_FIFO_CSR_TX_ATN_LVL_TU4_WORD_FULL); + switch (params_rate(params)) { case 32000: spdifclock = 4096000;
--
2.33.1