Merge branch 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 into fixes

1 files changed, 8 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_analog.c b/sound/pci/hda/patch_analog.c
index 447eda1f6770..1a36137e13ec 100644
--- a/sound/pci/hda/patch_analog.c
+++ b/sound/pci/hda/patch_analog.c
@@ -1789,6 +1789,14 @@ static int patch_ad1981(struct hda_codec *codec)
 
                 codec->patch_ops.init = ad1981_hp_init;
                 codec->patch_ops.unsol_event = ad1981_hp_unsol_event;
+                /* set the upper-limit for mixer amp to 0dB for avoiding the
+                 * possible damage by overloading
+                 */
+                snd_hda_override_amp_caps(codec, 0x11, 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;
         case AD1981_THINKPAD:
                 spec->mixers[0] = ad1981_thinkpad_mixers;