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ASoC: codecs: rt5640: Retry DEVICE_ID verification

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[ Upstream commit 19f971057b2d7b99c80530ec1052b45de236a8da ]

To be more resilient to codec-detection failures when the hardware
powers on slowly, add retry mechanism to the device verification check.
Similar pattern is found throughout a number of Realtek codecs. Our
tests show that 60ms delay is sufficient to address readiness issues on
rt5640 chip.

Reviewed-by: Amadeusz Sławiński <[email protected]>
Reviewed-by: Cezary Rojewski <[email protected]>
Signed-off-by: Xinxin Wan <[email protected]>
Signed-off-by: Cezary Rojewski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Xinxin Wan 2025-05-30 16:21:19 +02:00 • committed by Greg Kroah-Hartman
commit f1aa0fb41b
1 changed files with 5 additions and 0 deletions
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5
sound/soc/codecs/rt5640.c
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@ -2810,6 +2810,11 @@ static int rt5640_i2c_probe(struct i2c_client *i2c,
}
regmap_read(rt5640->regmap, RT5640_VENDOR_ID2, &val);
if (val != RT5640_DEVICE_ID) {
usleep_range(60000, 100000);
regmap_read(rt5640->regmap, RT5640_VENDOR_ID2, &val);
}
if (val != RT5640_DEVICE_ID) {
dev_err(&i2c->dev,
"Device with ID register %#x is not rt5640/39\n", val);