linux-kernel - [56/98] ALSA: hda: Fix 0 dB for Packard Bell models using Conexant CX20549 (Venice)

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Date:	Mon, 10 May 2010 15:35:08 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Daniel T Chen <crimsun@...ntu.com>,
	Takashi Iwai <tiwai@...e.de>
Subject: [56/98] ALSA: hda: Fix 0 dB for Packard Bell models using Conexant CX20549 (Venice)

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Daniel T Chen <crimsun@...ntu.com>

commit 8f0f5ff6777104084b4b2e1ae079541c2a6ed6d9 upstream.

BugLink: https://launchpad.net/bugs/541802

The OR's hardware distorts at PCM 100% because it does not correspond to
0 dB. Fix this in patch_cxt5045() for all Packard Bell models.

Reported-by: Valombre
Signed-off-by: Daniel T Chen <crimsun@...ntu.com>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 sound/pci/hda/patch_conexant.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -1175,9 +1175,10 @@ static int patch_cxt5045(struct hda_code
 
 	switch (codec->subsystem_id >> 16) {
 	case 0x103c:
+	case 0x1631:
 	case 0x1734:
-		/* HP & Fujitsu-Siemens laptops have really bad sound over 0dB
-		 * on NID 0x17. Fix max PCM level to 0 dB
+		/* HP, Packard Bell, & Fujitsu-Siemens laptops have really bad
+		 * sound over 0dB on NID 0x17. Fix max PCM level to 0 dB
 		 * (originally it has 0x2b steps with 0dB offset 0x14)
 		 */
 		snd_hda_override_amp_caps(codec, 0x17, HDA_INPUT,


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