From: Richard Fitzgerald rf@opensource.cirrus.com
The PLL should have locked before using it to supply MCLK.
Signed-off-by: Richard Fitzgerald rf@opensource.cirrus.com --- sound/soc/codecs/cs42l42.c | 12 +++++++++++- sound/soc/codecs/cs42l42.h | 2 ++ 2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index 68b5a450623d3..96f4e98ceaa0b 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -830,6 +830,7 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream) struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(component); unsigned int regval; u8 fullScaleVol; + int ret;
if (mute) { /* Mute the headphone */ @@ -855,9 +856,18 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream) } else { if (!cs42l42->stream_use) { /* SCLK must be running before codec unmute */ - if ((cs42l42->bclk < 11289600) && (cs42l42->sclk < 11289600)) + if ((cs42l42->bclk < 11289600) && (cs42l42->sclk < 11289600)) { snd_soc_component_update_bits(component, CS42L42_PLL_CTL1, CS42L42_PLL_START_MASK, 1); + ret = regmap_read_poll_timeout(cs42l42->regmap, + CS42L42_PLL_LOCK_STATUS, + regval, + (regval & 1), + CS42L42_PLL_LOCK_POLL_US, + CS42L42_PLL_LOCK_TIMEOUT_US); + if (ret < 0) + dev_warn(component->dev, "PLL failed to lock: %d\n", ret); + }
/* Mark SCLK as present, turn off internal oscillator */ regmap_multi_reg_write(cs42l42->regmap, cs42l42_to_sclk_seq, diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h index a0c87f2326e69..7a5048dfade20 100644 --- a/sound/soc/codecs/cs42l42.h +++ b/sound/soc/codecs/cs42l42.h @@ -756,6 +756,8 @@ #define CS42L42_NUM_SUPPLIES 5 #define CS42L42_BOOT_TIME_US 3000 #define CS42L42_CLOCK_SWITCH_DELAY_US 150 +#define CS42L42_PLL_LOCK_POLL_US 250 +#define CS42L42_PLL_LOCK_TIMEOUT_US 1250
static const char *const cs42l42_supply_names[CS42L42_NUM_SUPPLIES] = { "VA",