From: Andrey Liakhovets <liakh@dol.ru>
Date: Mon, 28 Aug 2006 14:52:41 +0000 (+0200)
Subject: [ALSA] ac97 - Fix VIA EPIA sound problem
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=9f458e7fb5b92385d348fb6039ba7211a6d6ba6e;p=openwrt%2Fstaging%2Fblogic.git

[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>
---

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;