[ALSA] MC97 registers reset

AC97 Codec
Separated ac97 registers reset for audio and modem (or both) as recommended
in AC97 spec.

Signed-off-by: Sasha Khapyorsky <sashak@smlink.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index ab7114c51dcb..1ad7f83a65e1 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -1872,7 +1872,11 @@ int snd_ac97_mixer(ac97_bus_t *bus, ac97_template_t *template, ac97_t **rac97)
                         goto __access_ok;
         }
 
-        snd_ac97_write(ac97, AC97_RESET, 0);    /* reset to defaults */
+        /* reset to defaults */
+        if (!(ac97->scaps & AC97_SCAP_SKIP_AUDIO))
+                snd_ac97_write(ac97, AC97_RESET, 0);
+        if (!(ac97->scaps & AC97_SCAP_SKIP_MODEM))
+                snd_ac97_write(ac97, AC97_EXTENDED_MID, 0);
         if (bus->ops->wait)
                 bus->ops->wait(ac97);
         else {