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Diffstat (limited to 'drivers/README.Matrox')
| -rw-r--r-- | drivers/README.Matrox | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/README.Matrox b/drivers/README.Matrox new file mode 100644 index 0000000000..ae641ab452 --- /dev/null +++ b/drivers/README.Matrox @@ -0,0 +1,46 @@ +The code in this directory is the old mga_vid driver for Linux kernels +prior to 2.6. It does _not_ compile for version 2.6.x. + +For Linux kernel 2.6.x please get the newest version of the 2.6 port from +http://attila.kinali.ch/mga/ + + +mga_vid - MGA G200/G400 YUV Overlay kernel module + + Author: + Aaron Holtzman <aholtzma@ess.engr.uvic.ca>, Oct 1999 + + Contributions by: + Fredrik Vraalsen <vraalsen@cs.uiuc.edu> + Alan Cox <alan@lxorguk.ukuu.org.uk> + + WARNING ----- WARNING + +This code messes with your video card and your X server. It will probably +lock up your box, format your hard drive, and cause your brand new G400 +MAX to spout 6 inch flames. You have been warned. + + WARNING ----- WARNING + +What does this code do? + + mga_vid is a kernel module that utilitizes the Matrox G200/G400/G550 + video scaler/overlay unit to perform YUV->RGB colorspace conversion + and arbitrary video scaling. + + mga_vid is also a monster hack. + +How does mga_vid work? + + This kernel module sets up the BES (backend scaler) with appropriate + values based on parameters supplied via ioctl. It also maps a chunk of + video memory into userspace via mmap. This memory is stolen from X + (which may decide to write to it later). The application can then write + image data directly to the framebuffer (if it knows the right padding, + etc). + + +How do I know if mga_vid works on my system? + + There is a test application called mga_vid_test. This test code should + draw some nice 256x256 images for you if all is working well. |