Per TAS2770 datasheet there must be a 1 ms delay from reset to first command. So insert delays into the driver where appropriate.

Fixes: 1a476abc723e ("tas2770: add tas2770 smart PA kernel driver") Signed-off-by: Martin Povišer povik+lin@cutebit.org --- In previous submission of this patch some people got their copy encrypted. That was by accident, pardon that. I have changed my email provider since.

v1: https://lore.kernel.org/alsa-devel/20220201234612.74401-1-povik+lin@protonma...

sound/soc/codecs/tas2770.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c index b52c0861edc8..b397a2122dd4 100644 --- a/sound/soc/codecs/tas2770.c +++ b/sound/soc/codecs/tas2770.c @@ -38,10 +38,12 @@ static void tas2770_reset(struct tas2770_priv *tas2770) gpiod_set_value_cansleep(tas2770->reset_gpio, 0); msleep(20); gpiod_set_value_cansleep(tas2770->reset_gpio, 1); + usleep_range(1000, 2000); }

snd_soc_component_write(tas2770->component, TAS2770_SW_RST, TAS2770_RST); + usleep_range(1000, 2000); }

static int tas2770_set_bias_level(struct snd_soc_component *component, @@ -110,6 +112,7 @@ static int tas2770_codec_resume(struct snd_soc_component *component)

if (tas2770->sdz_gpio) { gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); + usleep_range(1000, 2000); } else { ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, TAS2770_PWR_CTRL_MASK, @@ -529,8 +532,10 @@ static int tas2770_codec_probe(struct snd_soc_component *component)

tas2770->component = component;

- if (tas2770->sdz_gpio) + if (tas2770->sdz_gpio) { gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); + usleep_range(1000, 2000); + }

tas2770_reset(tas2770);