From d6c3cf81f05c8dd8e5e656d4bcb8d5f2569d0262 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 29 Aug 2007 15:12:46 +0200 Subject: [ALSA] ac97 - Suppress the reset of audio-codec from modem-codec at resume On codec chips with both audio and modem functions (e.g. Conexant one), performing AC97_RESET resets the whole registers. When both audio and modem drivers are resumed at the same time, the modem one often is resumed after the audio, and it results in the reset of audio registers (ALSA bug#3333). This patch fixes such a problem. Since the modem codec basically doesn't need AC97_RESET, skip this initialization unless specified as audio. Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/pci/ac97/ac97_codec.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'sound/pci/ac97') diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c index df1333332a5e..3e5ff29fc499 100644 --- a/sound/pci/ac97/ac97_codec.c +++ b/sound/pci/ac97/ac97_codec.c @@ -2496,7 +2496,10 @@ void snd_ac97_resume(struct snd_ac97 *ac97) snd_ac97_write(ac97, AC97_POWERDOWN, 0); if (! (ac97->flags & AC97_DEFAULT_POWER_OFF)) { - snd_ac97_write(ac97, AC97_RESET, 0); + if (!(ac97->scaps & AC97_SCAP_SKIP_AUDIO)) + snd_ac97_write(ac97, AC97_RESET, 0); + else if (!(ac97->scaps & AC97_SCAP_SKIP_MODEM)) + snd_ac97_write(ac97, AC97_EXTENDED_MID, 0); udelay(100); snd_ac97_write(ac97, AC97_POWERDOWN, 0); } -- cgit v1.2.1