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Commit 6cabf6b0 authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
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ALSA: Fix AC97 power down 



Some laptops don't like PR3 powerdown.  Do PR3 powerdown only
for the real power-saving.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
parent 942fd1eb

sound/pci/ac97/ac97_codec.c

+3 −1
Original line number Diff line number Diff line
@@ -2295,9 +2295,11 @@ static void snd_ac97_powerdown(struct snd_ac97 *ac97) 
	power |= AC97_PD_PR0 | AC97_PD_PR1;	/* ADC & DAC powerdown */

	snd_ac97_write(ac97, AC97_POWERDOWN, power);

	udelay(100);

	power |= AC97_PD_PR2 | AC97_PD_PR3;	/* Analog Mixer powerdown */

	power |= AC97_PD_PR2;	/* Analog Mixer powerdown (Vref on) */

	snd_ac97_write(ac97, AC97_POWERDOWN, power);

	if (ac97_is_power_save_mode(ac97)) {

		power |= AC97_PD_PR3;	/* Analog Mixer powerdown */

		snd_ac97_write(ac97, AC97_POWERDOWN, power);

		udelay(100);

		/* AC-link powerdown, internal Clk disable */

		/* FIXME: this may cause click noises on some boards */