From: Johan Hovold Date: Sat, 1 Jul 2023 09:47:23 +0000 (+0200) Subject: ASoC: codecs: wcd938x: fix soundwire initialisation race X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6f49256897083848ce9a59651f6b53fc80462397;p=linux.git ASoC: codecs: wcd938x: fix soundwire initialisation race Make sure that the soundwire device used for register accesses has been enumerated and initialised before trying to read the codec variant during component probe. This specifically avoids interpreting (a masked and shifted) -EBUSY errno as the variant: wcd938x_codec audio-codec: ASoC: error at soc_component_read_no_lock on audio-codec for register: [0x000034b0] -16 in case the soundwire device has not yet been initialised, which in turn prevents some headphone controls from being registered. Fixes: 8d78602aa87a ("ASoC: codecs: wcd938x: add basic driver") Cc: stable@vger.kernel.org # 5.14 Cc: Srinivas Kandagatla Reported-by: Steev Klimaszewski Signed-off-by: Johan Hovold Tested-by: Steev Klimaszewski Link: https://lore.kernel.org/r/20230701094723.29379-1-johan+linaro@kernel.org Signed-off-by: Mark Brown --- diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c index ddefe4af0b1ee..1595df2bf0e97 100644 --- a/sound/soc/codecs/wcd938x.c +++ b/sound/soc/codecs/wcd938x.c @@ -3081,9 +3081,18 @@ static int wcd938x_irq_init(struct wcd938x_priv *wcd, struct device *dev) static int wcd938x_soc_codec_probe(struct snd_soc_component *component) { struct wcd938x_priv *wcd938x = snd_soc_component_get_drvdata(component); + struct sdw_slave *tx_sdw_dev = wcd938x->tx_sdw_dev; struct device *dev = component->dev; + unsigned long time_left; int ret, i; + time_left = wait_for_completion_timeout(&tx_sdw_dev->initialization_complete, + msecs_to_jiffies(2000)); + if (!time_left) { + dev_err(dev, "soundwire device init timeout\n"); + return -ETIMEDOUT; + } + snd_soc_component_init_regmap(component, wcd938x->regmap); ret = pm_runtime_resume_and_get(dev);