Comment # 11 on bug 1095265 from Tom���� Chv��tal

(In reply to Takashi Iwai from comment #10)
> It's an option for dracut, not for mkinitrd.  But it doesn't look working as
> written in the man page...
> 
> In anyway, for dracut, maybe -I would be easier:
>   dracut -I /lib/firmware/i915/glk_dmc_ver1_04.bin --force --host-only

Yep this works.

Also it shutsup the warning from the dmesg. So the cause was the firmware not
present in initrd.

Now how to get it properly detected to get it automatically included :)