nanogui: Raw hardware VGA driver Q
Subject:
Re: [nanogui] Raw hardware VGA driver Q
From:
Alan Cox ####@####.####
Date:
7 Jan 2002 17:24:24 -0000
Message-Id: <E16NdeQ-0001su-00@the-village.bc.nu>
> Right, thanks. Does anyone know of a generic way to address SVGA displays above 640x480x4
> (on eCos, not Linux) without having to write a new driver for each video chipset? Or maybe
> somone has a sample SVGA driver they might be willing to share.
There is no generic way to do so, nor is there a generic way to initialise
the chipset (which is generally an even bigger issue). Pretty much all
SVGA chipsets can be initialised into a mode where they provide byte packed
8/16/32bit (paletteised, RGB555/RGB565/RGBA) frame buffers linearly in
memory with exactly the sane layout you would expect (and the existing
drivers expect for Linux framebuffer modes)
Alan
