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diff --git a/Documentation/fb/gxfb.rst b/Documentation/fb/gxfb.rst new file mode 100644 index 000000000..5738709bc --- /dev/null +++ b/Documentation/fb/gxfb.rst @@ -0,0 +1,54 @@ +============= +What is gxfb? +============= + +.. [This file is cloned from VesaFB/aty128fb] + +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.rst 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> |