diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/fb/pvr2fb.txt |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'Documentation/fb/pvr2fb.txt')
-rw-r--r-- | Documentation/fb/pvr2fb.txt | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/Documentation/fb/pvr2fb.txt b/Documentation/fb/pvr2fb.txt new file mode 100644 index 000000000000..2bf6c2321c2d --- /dev/null +++ b/Documentation/fb/pvr2fb.txt @@ -0,0 +1,61 @@ +$Id: pvr2fb.txt,v 1.1 2001/05/24 05:09:16 mrbrown Exp $ + +What is pvr2fb? +=============== + +This is a driver for PowerVR 2 based graphics frame buffers, such as the +one found in the Dreamcast. + +Advantages: + + * It provides a nice large console (128 cols + 48 lines with 1024x768) + without using tiny, unreadable fonts. + * You can run XF86_FBDev on top of /dev/fb0 + * Most important: boot logo :-) + +Disadvantages: + + * Driver is currently limited to the Dreamcast PowerVR 2 implementation + at the time of this writing. + +Configuration +============= + +You can pass kernel command line options to pvr2fb with +`video=pvr2fb:option1,option2:value2,option3' (multiple options should be +separated by comma, values are separated from options by `:'). +Accepted options: + +font:X - default font to use. All fonts are supported, including the + SUN12x22 font which is very nice at high resolutions. + +mode:X - default video mode. The following video modes are supported: + 640x240-60, 640x480-60. + + Note: the 640x240 mode is currently broken, and should not be + used for any reason. It is only mentioned as a reference. + +inverse - invert colors on screen (for LCD displays) + +nomtrr - disables write combining on frame buffer. This slows down driver + but there is reported minor incompatibility between GUS DMA and + XFree under high loads if write combining is enabled (sound + dropouts). MTRR is enabled by default on systems that have it + configured and that support it. + +cable:X - cable type. This can be any of the following: vga, rgb, and + composite. If none is specified, we guess. + +output:X - output type. This can be any of the following: pal, ntsc, and + vga. If none is specified, we guess. + +X11 +=== + +XF86_FBDev should work, in theory. At the time of this writing it is +totally untested and may or may not even portray the beginnings of +working. If you end up testing this, please let me know! + +-- +Paul Mundt <lethal@linuxdc.org> + |