forked from Minki/linux
ASoC: tegra20: spdif: Set FIFO trigger level
FIFO trigger level must be not less than the size of DMA burst, otherwise audio will be played x4 faster that it should be because part of the DMA data will be dropped on FIFO input buffer overflow. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Link: https://lore.kernel.org/r/20211204143725.31646-6-digetx@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
parent
549818e5c8
commit
16736a0221
@ -69,6 +69,14 @@ 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;
|
||||
|
Loading…
Reference in New Issue
Block a user