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: Ondrej Zary <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
jledet · Nov 2, 2015 · 2c8d089 · 2c8d089
1 parent 030270b
commit 2c8d089
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c
@@ -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);
+	}
 }