https://github.com/torvalds/linux
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Tip revision: d6d5df1db6e9d7f8f76d2911707f7d5877251b02 authored by Linus Torvalds on 27 October 2019, 17:19:19 UTC
Linux 5.4-rc5
Tip revision: d6d5df1
efifb.rst
==============
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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