Prev: [074/156] USB: option: move hardcoded PID to a macro in usb/serial/option
Next: [105/116] leds-gpio: fix default state handling on OF platforms
From: Greg KH on 30 Mar 2010 19:50
2.6.33-stable review patch. If anyone has any objections, please let us know.

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

From: Daniel T Chen <crimsun(a)ubuntu.com>

commit 025f206c9e0f96cc41567b01c07fb852d8900da1 upstream.

BugLink: https://launchpad.net/bugs/420578

The OR has verified that his hardware distorts because of the 0 dB
offset not corresponding to the highest PCM level. Fix this by capping
said PCM level to 0 dB similarly to what we do for CX20549 (Venice).

Reported-by: Mike Pontillo <pontillo(a)gmail.com>
Tested-by: Mike Pontillo <pontillo(a)gmail.com>
Signed-off-by: Daniel T Chen <crimsun(a)ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai(a)suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
sound/pci/hda/patch_conexant.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -1570,6 +1570,21 @@ static int patch_cxt5047(struct hda_code
#endif
}
spec->vmaster_nid = 0x13;
+
+ switch (codec->subsystem_id >> 16) {
+ case 0x103c:
+ /* HP laptops have really bad sound over 0 dB on NID 0x10.
+ * Fix max PCM level to 0 dB (originally it has 0x1e steps
+ * with 0 dB offset 0x17)
+ */
+ snd_hda_override_amp_caps(codec, 0x10, HDA_INPUT,
+ (0x17 << AC_AMPCAP_OFFSET_SHIFT) |
+ (0x17 << AC_AMPCAP_NUM_STEPS_SHIFT) |
+ (0x05 << AC_AMPCAP_STEP_SIZE_SHIFT) |
+ (1 << AC_AMPCAP_MUTE_SHIFT));
+ break;
+ }
+
return 0;
}



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [074/156] USB: option: move hardcoded PID to a macro in usb/serial/option
Next: [105/116] leds-gpio: fix default state handling on OF platforms