ASoC: max98373: Added 30ms turn on/off time delay

BugLink: https://bugs.launchpad.net/bugs/1926493
[ Upstream commit 3a27875e91fb9c29de436199d20b33f9413aea77 ]

Amp requires 10 ~ 30ms for the power ON and OFF.
Added 30ms delay for stability.

Signed-off-by: Ryan Lee <ryans.lee@maximintegrated.com>
Link: https://lore.kernel.org/r/20210325033555.29377-2-ryans.lee@maximintegrated.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/sound/soc/codecs/max98373.c b/sound/soc/codecs/max98373.c
index 96718e3a1ad0e8d2dbd34d981e311770d5b5ccd0..16fbc9faed90b7e963f6e8d33186710f2c1cdb8c 100644 (file)
--- a/sound/soc/codecs/max98373.c
+++ b/sound/soc/codecs/max98373.c
@@ -410,11 +410,13 @@ static int max98373_dac_event(struct snd_soc_dapm_widget *w,
                regmap_update_bits(max98373->regmap,
                        MAX98373_R20FF_GLOBAL_SHDN,
                        MAX98373_GLOBAL_EN_MASK, 1);
+               usleep_range(30000, 31000);
                break;
        case SND_SOC_DAPM_POST_PMD:
                regmap_update_bits(max98373->regmap,
                        MAX98373_R20FF_GLOBAL_SHDN,
                        MAX98373_GLOBAL_EN_MASK, 0);
+               usleep_range(30000, 31000);
                max98373->tdm_mode = false;
                break;
        default: