0001 =============
0002 What is gxfb?
0003 =============
0004
0005 .. [This file is cloned from VesaFB/aty128fb]
0006
0007 This is a graphics framebuffer driver for AMD Geode GX2 based processors.
0008
0009 Advantages:
0010
0011 * No need to use AMD's VSA code (or other VESA emulation layer) in the
0012 BIOS.
0013 * It provides a nice large console (128 cols + 48 lines with 1024x768)
0014 without using tiny, unreadable fonts.
0015 * You can run XF68_FBDev on top of /dev/fb0
0016 * Most important: boot logo :-)
0017
0018 Disadvantages:
0019
0020 * graphic mode is slower than text mode...
0021
0022
0023 How to use it?
0024 ==============
0025
0026 Switching modes is done using gxfb.mode_option=<resolution>... boot
0027 parameter or using `fbset` program.
0028
0029 See Documentation/fb/modedb.rst for more information on modedb
0030 resolutions.
0031
0032
0033 X11
0034 ===
0035
0036 XF68_FBDev should generally work fine, but it is non-accelerated.
0037
0038
0039 Configuration
0040 =============
0041
0042 You can pass kernel command line options to gxfb with gxfb.<option>.
0043 For example, gxfb.mode_option=800x600@75.
0044 Accepted options:
0045
0046 ================ ==================================================
0047 mode_option specify the video mode. Of the form
0048 <x>x<y>[-<bpp>][@<refresh>]
0049 vram size of video ram (normally auto-detected)
0050 vt_switch enable vt switching during suspend/resume. The vt
0051 switch is slow, but harmless.
0052 ================ ==================================================
0053
0054 Andres Salomon <dilinger@debian.org>
