提交 2c8d0892 编写于 作者: O Ondrej Zary 提交者: Takashi Iwai

ALSA: maestro3: Fix Allegro mute until master volume/mute is touched

ESS Allegro (marked ES1989S), [125d:1988] (rev 10) is mute after
loading snd-maestro3 and running alsactl restore. Touching master
volume or mute makes it work.

Looks like a bug in the AC'97 codec integrated into the chip.

Write AC97_MASTER register twice to work-around the problem.
Signed-off-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
上级 030270ba
......@@ -1929,6 +1929,16 @@ snd_m3_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
return;
snd_m3_outw(chip, val, CODEC_DATA);
snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND);
/*
* Workaround for buggy ES1988 integrated AC'97 codec. It remains silent
* until the MASTER volume or mute is touched (alsactl restore does not
* work).
*/
if (ac97->id == 0x45838308 && reg == AC97_MASTER) {
snd_m3_ac97_wait(chip);
snd_m3_outw(chip, val, CODEC_DATA);
snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND);
}
}
......
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