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Commit c805df3d authored by Andres Salomon's avatar Andres Salomon Committed by Linus Torvalds
Browse files

lxfb: rename kernel arg fbsize to vram 



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

Signed-off-by: default avatarAndres Salomon <dilinger@debian.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f694e53b

Documentation/fb/lxfb.txt

0 → 100644
+50 −0
Original line number Diff line number Diff line 
[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>

drivers/video/geode/lxfb_core.c

+5 −7
Original line number Diff line number Diff line
@@ -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");