https://github.com/torvalds/linux
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Tip revision: 11da3a7f84f19c26da6f86af878298694ede0804 authored by Linus Torvalds on 10 September 2018, 00:26:43 UTC
Linux 4.19-rc3
Tip revision: 11da3a7
efifb.txt

What is efifb?
===============

This is a generic EFI platform driver for Intel based Apple computers.
efifb is only for EFI booted Intel Macs.

Supported Hardware
==================

iMac 17"/20"
Macbook
Macbook Pro 15"/17"
MacMini

How to use it?
==============

efifb does not have any kind of autodetection of your machine.
You have to add the following kernel parameters in your elilo.conf:
	Macbook :
		video=efifb:macbook
	MacMini :
		video=efifb:mini
	Macbook Pro 15", iMac 17" :
		video=efifb:i17
	Macbook Pro 17", iMac 20" :
		video=efifb:i20

Accepted options:

nowc	Don't map the framebuffer write combined. This can be used
	to workaround side-effects and slowdowns on other CPU cores
	when large amounts of console data are written.

--
Edgar Hucek <gimli@dark-green.com>
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