Can you show a source for this claim? There exists this codepath in adp_open:

  int adp_open(struct inode *inode, struct file *filp)
  {
   if (current->comm[0] == 'X')
    return -EBUSY;
  
   return drm_open(inode, filp);
  }

but: (a) You know what "adp" stands for? It stands for Apple Display Pipe, or the touchbar. (b) Back when I was dailydriving asahi, I actually had to patch that to check for 's' instead of 'X', because sway dies on this exact thing too.