提交 acec30ff 编写于 作者: P Pavel Hofman 提交者: Jaroslav Kysela

[ALSA] I2C fix for ice1724

adding i2c busy wait before sending device address to prevent reading
bogus data.
Signed-off-by: NPavel Hofman <dustin@seznam.cz>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@perex.cz>
上级 109c53f8
......@@ -1958,6 +1958,7 @@ unsigned char snd_vt1724_read_i2c(struct snd_ice1712 *ice,
unsigned char val;
mutex_lock(&ice->i2c_mutex);
wait_i2c_busy(ice);
outb(addr, ICEREG1724(ice, I2C_BYTE_ADDR));
outb(dev & ~VT1724_I2C_WRITE, ICEREG1724(ice, I2C_DEV_ADDR));
wait_i2c_busy(ice);
......
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