Function drm_ffi::get_bus_id

pub fn get_bus_id(
    fd: RawFd, 
    buf: Option<&mut &mut [u8]>
) -> Result<drm_unique, Error>

Load this device’s Bus ID into a buffer.

If the buffer is too small, this will load the maximum bytes in the buffer. If the buffer is too big, this will coerce the buffer to the proper size.