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  1. May 31, 2022
  2. May 30, 2022
    • Marios Levogiannis's avatar
      ALSA: hda/realtek - Fix microphone noise on ASUS TUF B550M-PLUS · 9bfa7b36
      Marios Levogiannis authored
      
      Set microphone pins 0x18 (rear) and 0x19 (front) to VREF_50 to fix the
      microphone noise on ASUS TUF B550M-PLUS which uses the ALCS1200A codec.
      The initial value was VREF_80.
      
      The same issue is also present on Windows using both the default Windows
      driver and all tested Realtek drivers before version 6.0.9049.1. Comparing
      Realtek driver 6.0.9049.1 (the first one without the microphone noise) to
      Realtek driver 6.0.9047.1 (the last one with the microphone noise)
      revealed that the fix is the result of setting pins 0x18 and 0x19 to
      VREF_50.
      
      This fix may also work for other boards that have been reported to have
      the same microphone issue and use the ALC1150 and ALCS1200A codecs, since
      these codecs are similar and the fix in the Realtek driver on Windows is
      common for both. However, it is currently enabled only for ASUS TUF
      B550M-PLUS as this is the only board that could be tested.
      
      Signed-off-by: default avatarMarios Levogiannis <marios.levogiannis@gmail.com>
      Cc: <stable@vger.kernel.org>
      Link: https://lore.kernel.org/r/20220530074131.12258-1-marios.levogiannis@gmail.com
      
      
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      9bfa7b36
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