From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-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! --- Documentation/fb/tridentfb.txt | 54 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/fb/tridentfb.txt (limited to 'Documentation/fb/tridentfb.txt') diff --git a/Documentation/fb/tridentfb.txt b/Documentation/fb/tridentfb.txt new file mode 100644 index 000000000000..8a6c8a43e6a3 --- /dev/null +++ b/Documentation/fb/tridentfb.txt @@ -0,0 +1,54 @@ +Tridentfb is a framebuffer driver for some Trident chip based cards. + +The following list of chips is thought to be supported although not all are +tested: + +those from the Image series with Cyber in their names - accelerated +those with Blade in their names (Blade3D,CyberBlade...) - accelerated +the newer CyberBladeXP family - nonaccelerated + +Only PCI/AGP based cards are supported, none of the older Tridents. + +How to use it? +============== + +When booting you can pass the video parameter. +video=tridentfb + +The parameters for tridentfb are concatenated with a ':' as in this example. + +video=tridentfb:800x600,bpp=16,noaccel + +The second level parameters that tridentfb understands are: + +noaccel - turns off acceleration (when it doesn't work for your card) +accel - force text acceleration (for boards which by default are noacceled) + +fp - use flat panel related stuff +crt - assume monitor is present instead of fp + +center - for flat panels and resolutions smaller than native size center the + image, otherwise use +stretch + +memsize - integer value in Kb, use if your card's memory size is misdetected. + look at the driver output to see what it says when initializing. +memdiff - integer value in Kb,should be nonzero if your card reports + more memory than it actually has.For instance mine is 192K less than + detection says in all three BIOS selectable situations 2M, 4M, 8M. + Only use if your video memory is taken from main memory hence of + configurable size.Otherwise use memsize. + If in some modes which barely fit the memory you see garbage at the bottom + this might help by not letting change to that mode anymore. + +nativex - the width in pixels of the flat panel.If you know it (usually 1024 + 800 or 1280) and it is not what the driver seems to detect use it. + +bpp - bits per pixel (8,16 or 32) +mode - a mode name like 800x600 (as described in Documentation/fb/modedb.txt) + +Using insane values for the above parameters will probably result in driver +misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or +nativex=93) + +Contact: jani@astechnix.ro -- cgit v1.2.3