• Marc Vertes's avatar
    ALSA: hda_intel - revert a quirk that affect VIA chipsets · 4f8b6c7d
    Marc Vertes authored
    This quirk sould be reverted. It has the following probems:
    
    1) The quirk was intended to "ASUS MV2-MX SE" motherboards only, but the
    ID used matches a much broader range, potentially all boards containing a
    VIA chipset model in the family of vendor VIA 0x1106 and audio device ID
    0x3288, which encompasses VIA-VT82xx, VIA-VT1xx and VIA-VT20xx chipsets.
    
    2) VIA chipsets rely on azx_via_get_position() to handle correctly dma
    transfers during capture. Using POS_FIX_LPIB instead of POS_FIX_VIACOMBO
    leads to partially corrupted input buffers during capture. The effects
    of this bug are not immediately visible, it took strong DSP expertise,
    some expensive signal generator and a spectrum analyzer to identify it
    and verify correct behaviour using original default.
    
    3) It's almost certain that the quirk did not fix the real problem,
    if there was one. Refer to original submission:
    http://mailman.alsa-project.org/pipermail/alsa-devel/2010-February/025109.htmlSigned-of-by: default avatarMarc Vertes <mvertes@sigfox.com>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    4f8b6c7d
hda_intel.c 84.5 KB