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authorTakashi Iwai <tiwai@suse.de>2009-04-16 14:19:19 +0200
committerTakashi Iwai <tiwai@suse.de>2009-04-16 14:20:23 +0200
commit4dc1f87f079d5c6b01284d08b28eff2c4fbd15c4 (patch)
treea302dc5ac9b1e80d3577ddc55008f70ade0daa46 /sound
parentffd0e56c606836581da5df742a43ce8015ca7475 (diff)
ALSA: hda - Add upper-limit of mixer amp for AD1884A-laptop model, too
Add the upper-limit of mixer amp for AD1884A-laptop model just like the mobile model for some HP laptops. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/patch_analog.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_analog.c b/sound/pci/hda/patch_analog.c
index 38ad3f7b040..9bcd8ab5a27 100644
--- a/sound/pci/hda/patch_analog.c
+++ b/sound/pci/hda/patch_analog.c
@@ -3977,6 +3977,14 @@ static int patch_ad1884a(struct hda_codec *codec)
spec->input_mux = &ad1884a_laptop_capture_source;
codec->patch_ops.unsol_event = ad1884a_hp_unsol_event;
codec->patch_ops.init = ad1884a_hp_init;
+ /* set the upper-limit for mixer amp to 0dB for avoiding the
+ * possible damage by overloading
+ */
+ snd_hda_override_amp_caps(codec, 0x20, 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 AD1884A_MOBILE:
spec->mixers[0] = ad1884a_mobile_mixers;