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Based on kernel version 3.16. Page generated on 2014-08-06 21:39 EST.

1	$Id: pvr2fb.txt,v 1.1 2001/05/24 05:09:16 mrbrown Exp $
2	
3	What is pvr2fb?
4	===============
5	
6	This is a driver for PowerVR 2 based graphics frame buffers, such as the
7	one found in the Dreamcast.
8	
9	Advantages:
10	
11	 * It provides a nice large console (128 cols + 48 lines with 1024x768)
12	   without using tiny, unreadable fonts (NOT on the Dreamcast)
13	 * You can run XF86_FBDev on top of /dev/fb0
14	 * Most important: boot logo :-)
15	
16	Disadvantages:
17	
18	 * Driver is largely untested on non-Dreamcast systems.
19	
20	Configuration
21	=============
22	
23	You can pass kernel command line options to pvr2fb with
24	`video=pvr2fb:option1,option2:value2,option3' (multiple options should be
25	separated by comma, values are separated from options by `:').
26	Accepted options:
27	
28	font:X    - default font to use. All fonts are supported, including the
29	            SUN12x22 font which is very nice at high resolutions.
30	
31		    
32	mode:X    - default video mode with format [xres]x[yres]-<bpp>@<refresh rate>
33	            The following video modes are supported:
34	            640x640-16@60, 640x480-24@60, 640x480-32@60. The Dreamcast
35	            defaults to 640x480-16@60. At the time of writing the
36	            24bpp and 32bpp modes function poorly. Work to fix that is
37	            ongoing
38	
39	            Note: the 640x240 mode is currently broken, and should not be
40	            used for any reason. It is only mentioned here as a reference.
41	
42	inverse   - invert colors on screen (for LCD displays)
43	
44	nomtrr    - disables write combining on frame buffer. This slows down driver
45	            but there is reported minor incompatibility between GUS DMA and
46	            XFree under high loads if write combining is enabled (sound
47	            dropouts). MTRR is enabled by default on systems that have it
48	            configured and that support it.
49	
50	cable:X   - cable type. This can be any of the following: vga, rgb, and
51	            composite. If none is specified, we guess.
52	
53	output:X  - output type. This can be any of the following: pal, ntsc, and
54	            vga. If none is specified, we guess.
55	
56	X11
57	===
58	
59	XF86_FBDev has been shown to work on the Dreamcast in the past - though not yet
60	on any 2.6 series kernel.
61	
62	--
63	Paul Mundt <lethal@linuxdc.org>
64	Updated by Adrian McMenamin <adrian@mcmen.demon.co.uk>
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