lkml.org 
[lkml]   [2010]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[046/116] ALSA: hda: Fix 0 dB offset for HP laptops using CX20551 (Waikiki)
    2.6.32-stable review patch.  If anyone has any objections, please let us know.

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

    From: Daniel T Chen <crimsun@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@gmail.com>
    Tested-by: Mike Pontillo <pontillo@gmail.com>
    Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
    Signed-off-by: Takashi Iwai <tiwai@suse.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@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
    @@ -1581,6 +1581,21 @@ 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;
    }




    \
     
     \ /
      Last update: 2010-03-31 02:13    [W:2.043 / U:0.148 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site