mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Andres Salomon](/assets/img/avatar_default.png)
Prior to suspend, we allocate and switch to a new VT; after suspend, we switch back to the original VT. This can be slow, and is completely unnecessary if the framebuffer we're using can restore video properly. This adds a hook that allows drivers to select whether or not to do this vt switch, and changes the gxfb driver to call this hook. It also adds a module param to gxfb to allow controlling of the vt switch (defaulting to no switch). (Note: I'm not convinced that console_sem is the best way to protect this, but we should probably have some form of locking..) [akpm@linux-foundation.org: build fix] Signed-off-by: Andres Salomon <dilinger@debian.org> Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
52 lines
1.2 KiB
Text
52 lines
1.2 KiB
Text
[This file is cloned from VesaFB/aty128fb]
|
|
|
|
What is gxfb?
|
|
=================
|
|
|
|
This is a graphics framebuffer driver for AMD Geode GX2 based processors.
|
|
|
|
Advantages:
|
|
|
|
* No need to use AMD's VSA code (or other VESA emulation layer) in the
|
|
BIOS.
|
|
* It provides a nice large console (128 cols + 48 lines with 1024x768)
|
|
without using tiny, unreadable fonts.
|
|
* You can run XF68_FBDev on top of /dev/fb0
|
|
* Most important: boot logo :-)
|
|
|
|
Disadvantages:
|
|
|
|
* graphic mode is slower than text mode...
|
|
|
|
|
|
How to use it?
|
|
==============
|
|
|
|
Switching modes is done using gxfb.mode_option=<resolution>... boot
|
|
parameter or using `fbset' program.
|
|
|
|
See Documentation/fb/modedb.txt for more information on modedb
|
|
resolutions.
|
|
|
|
|
|
X11
|
|
===
|
|
|
|
XF68_FBDev should generally work fine, but it is non-accelerated.
|
|
|
|
|
|
Configuration
|
|
=============
|
|
|
|
You can pass kernel command line options to gxfb with gxfb.<option>.
|
|
For example, gxfb.mode_option=800x600@75.
|
|
Accepted options:
|
|
|
|
mode_option - specify the video mode. Of the form
|
|
<x>x<y>[-<bpp>][@<refresh>]
|
|
vram - size of video ram (normally auto-detected)
|
|
vt_switch - enable vt switching during suspend/resume. The vt
|
|
switch is slow, but harmless.
|
|
|
|
--
|
|
Andres Salomon <dilinger@debian.org>
|