From: Tzung-Bi Shih tzungbi@google.com

[ Upstream commit 6f49919d11690a9b5614445ba30fde18083fdd63 ]

According to the datasheet, PLL lock time typically takes 2 msec and at most takes 7 msec.

Check the lock status every 1 msec and exit the workaround if PLL is locked.

Signed-off-by: Tzung-Bi Shih tzungbi@google.com Link: https://lore.kernel.org/r/20191122073114.219945-3-tzungbi@google.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/max98090.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c index f8c8b9decab6..172a48d42479 100644 --- a/sound/soc/codecs/max98090.c +++ b/sound/soc/codecs/max98090.c @@ -2126,6 +2126,8 @@ static void max98090_pll_work(struct work_struct *work) struct max98090_priv *max98090 = container_of(work, struct max98090_priv, pll_work); struct snd_soc_component *component = max98090->component; + unsigned int pll; + int i;

if (!snd_soc_component_is_active(component)) return; @@ -2145,8 +2147,16 @@ static void max98090_pll_work(struct work_struct *work) snd_soc_component_update_bits(component, M98090_REG_DEVICE_SHUTDOWN, M98090_SHDNN_MASK, M98090_SHDNN_MASK);

- /* Give PLL time to lock */ - msleep(10); + for (i = 0; i < 10; ++i) { + /* Give PLL time to lock */ + usleep_range(1000, 1200); + + /* Check lock status */ + pll = snd_soc_component_read32( + component, M98090_REG_DEVICE_STATUS); + if (!(pll & M98090_ULK_MASK)) + break; + } }

static void max98090_jack_work(struct work_struct *work)