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lxfb: rename kernel arg fbsize to vram

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Match other fb drivers (including gxfb).  Also, document the current boot
arguments in Documentation/fb/lxfb.txt.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andres Salomon 2008-04-28 02:15:27 -07:00 committed by Linus Torvalds
parent f694e53bd0
commit c805df3d62
2 changed files with 55 additions and 7 deletions
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50
Documentation/fb/lxfb.txt Normal file
View file

@ -0,0 +1,50 @@
[This file is cloned from VesaFB/aty128fb]
What is lxfb?
=================
This is a graphics framebuffer driver for AMD Geode LX 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 lxfb.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 lxfb with lxfb.<option>.
For example, lxfb.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)
--
Andres Salomon <dilinger@debian.org>

12
drivers/video/geode/lxfb_core.c
View file

@ -27,7 +27,7 @@
static char *mode_option;
static int noclear, nopanel, nocrt;
static int fbsize;
static int vram;
/* Most of these modes are sorted in ascending order, but
* since the first entry in this table is the "default" mode,
@ -339,7 +339,7 @@ static int __init lxfb_map_video_memory(struct fb_info *info,
return ret;
info->fix.smem_start = pci_resource_start(dev, 0);
info->fix.smem_len = fbsize ? fbsize : lx_framebuffer_size();
info->fix.smem_len = vram ? vram : lx_framebuffer_size();
info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
@ -608,9 +608,7 @@ static int __init lxfb_setup(char *options)
if (!*opt)
continue;
if (!strncmp(opt, "fbsize:", 7))
fbsize = simple_strtoul(opt+7, NULL, 0);
else if (!strcmp(opt, "noclear"))
if (!strcmp(opt, "noclear"))
noclear = 1;
else if (!strcmp(opt, "nopanel"))
nopanel = 1;
@ -647,8 +645,8 @@ module_exit(lxfb_cleanup);
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
module_param(fbsize, int, 0);
MODULE_PARM_DESC(fbsize, "video memory size");
module_param(vram, int, 0);
MODULE_PARM_DESC(vram, "video memory size");
MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
MODULE_LICENSE("GPL");