[ALSA] ac97 - Fix VIA EPIA sound problem

Fix the bad sound quality on VIA EPIA system using VIA VT1617A
(ALSA bug#2381).

Signed-off-by: Andrey Liakhovets <liakh@dol.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 4 insertions, 0 deletions

diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index 392f6ccace5d..bdd7f89234f6 100644
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -2799,6 +2799,10 @@ int patch_vt1616(struct snd_ac97 * ac97)
  */
 int patch_vt1617a(struct snd_ac97 * ac97)
 {
+        /* bring analog power consumption to normal, like WinXP driver
+         * for EPIA SP
+         */
+        snd_ac97_write_cache(ac97, 0x5c, 0x20);
         ac97->ext_id |= AC97_EI_SPDIF;  /* force the detection of spdif */
         ac97->rates[AC97_RATES_SPDIF] = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000;
         return 0;