diff options
| author | Hector Martin <marcan@marcan.st> | 2025-02-08 01:03:25 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2025-02-16 23:51:27 +0000 |
| commit | 08a66f55f7246d477b19620a953476dfc02beefc (patch) | |
| tree | dca24a4da7634ebba886759230821e42fd91a516 | |
| parent | 1c3b5f37409682184669457a5bdf761268eafbe5 (diff) | |
ASoC: tas2764: Wait for ramp-down after shutdown
When we shut down the amp, we need to wait for the built-in ramp-down
before we can remove the TDM clocks. There is no documented status
regiter to poll, so the best we can do is a delay. Datasheet says 5.9ms
for ramp-down and 1.5ms between shutdown and next startup, so let's do
6ms after mute and 2ms after shutdown. That gives us a cumulative 8ms
for ramp-down and guaratees the required minimum shutdown time.
Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/20250208-asoc-tas2764-v1-2-dbab892a69b5@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | sound/soc/codecs/tas2764.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c index 60d660a88fab..0b033ab51f7f 100644 --- a/sound/soc/codecs/tas2764.c +++ b/sound/soc/codecs/tas2764.c @@ -142,6 +142,8 @@ static int tas2764_codec_suspend(struct snd_soc_component *component) regcache_cache_only(tas2764->regmap, true); regcache_mark_dirty(tas2764->regmap); + usleep_range(6000, 7000); + return 0; } @@ -228,10 +230,16 @@ static int tas2764_mute(struct snd_soc_dai *dai, int mute, int direction) return ret; if (mute) { + /* Wait for ramp-down */ + usleep_range(6000, 7000); + tas2764->dac_powered = false; ret = tas2764_update_pwr_ctrl(tas2764); if (ret) return ret; + + /* Wait a bit after shutdown */ + usleep_range(2000, 3000); } return 0; |