Barbarossa B4rb4r0ss4

## cs35l41_spi.md

      
        
          
            
              
              5 files
            
          
          
            
              
              0 forks
            
          
          
            
              
              0 comments
            
          
          
            
              
              0 stars
            
          
        
        
          
              
          
          
            
                B4rb4r0ss4
                / cs35l41_spi.md
            
            
              Created
              May 3, 2023 13:38
                — forked from lamperez/cs35l41_spi.md
            
              
                CS35L41 amplifiers in an ASUS Zenbook on linux
              
          
        
      
        
  
      
    Asus Zenbook UX3402 speakers on Linux

I got the speakers working on my Asus Zenbook 14 OLED UX3402, the one with Intel CPU and the two CS35L41
audio amplifiers connected over SPI (not the UM3402YA, with AMD and I²C). The amplifiers are supported by the snd_hda_scodec_cs35l41 module in recent kernel versions, but they require some model-specific configuration paramaters, that should be provided by the BIOS, via ACPI. Of course, they are missing. It seems that the Windows drivers have those parameters somehow hardcoded, instead of using ACPI (bad idea, but who am I to criticise). Since Asus has been nasty and refused/was not able to update the BIOS with the missing data, I have patched the ACPI tables myself.

Warning

As stated by Cirrus developers,
if you try this there is a non-zero (low, I hope) possibility
of