linux-kernel - [55/98] ALSA: hda: Fix max PCM level to 0 dB for Fujitsu-Siemens laptops using CX20549 (Venice)

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Date:	Mon, 10 May 2010 15:35:07 -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: [55/98] ALSA: hda: Fix max PCM level to 0 dB for Fujitsu-Siemens laptops using 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 0b587fc4d35afb1bc0fc3d890084bb14c78372dc upstream.

BugLink: https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4792

Cristian reported that these models have really bad sound above 6 dB
and proposed the original patch. I've updated the comment to reflect
this change.

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

---
 sound/pci/hda/patch_conexant.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 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:
-		/* HP laptop has a really bad sound over 0dB on NID 0x17.
-		 * Fix max PCM level to 0 dB
-		 * (originall it has 0x2b steps with 0dB offset 0x14)
+	case 0x1734:
+		/* HP & 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,
 					  (0x14 << AC_AMPCAP_OFFSET_SHIFT) |


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