diff options
| -rw-r--r-- | Documentation/fb/lxfb.txt | 50 | ||||
| -rw-r--r-- | drivers/video/geode/lxfb_core.c | 12 |
2 files changed, 55 insertions, 7 deletions
diff --git a/Documentation/fb/lxfb.txt b/Documentation/fb/lxfb.txt new file mode 100644 index 00000000000..80656078d4d --- /dev/null +++ b/Documentation/fb/lxfb.txt @@ -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> diff --git a/drivers/video/geode/lxfb_core.c b/drivers/video/geode/lxfb_core.c index b565882eee3..1da944bdb11 100644 --- a/drivers/video/geode/lxfb_core.c +++ b/drivers/video/geode/lxfb_core.c @@ -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"); |