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List:       linux-fbdev-devel
Subject:    Re: [Linux-fbdev-devel] Silicon Motion SM501 Voyager GX fb driver development
From:       "Antonino A. Daplas" <adaplas () hotpop ! com>
Date:       2004-12-09 20:01:57
Message-ID: 200412100401.57061.adaplas () hotpop ! com
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On Thursday 09 December 2004 18:44, Clemens Koller wrote:
> Hello!
>
> Well, I am about to implement a fbdev for the Silicon Motion Inc.'s
> SM501 (alias Voyager GX) embedded graphics controller for our
> next projects. (http://www.siliconmotion.com/sm501.htm)
>
> The goal is to get a stable fb up and running on a current Kernel 2.6.x
> The Platform is currently a PowerMac G4 Windtunnel (CRUX PPC 2.0)
> and later on it will be a Freescale MPC8540 embedded processor.
> The SM501 hardware is the PCI Demo Board from SMI.
>
> I've started from the latest ix86 released driver from SMI and I
> got some basic functionality working. (There appears some (sometimes
> garbled) image on the panel, driver has memory leaks, as there are
> pci_resource and ioremap problems ...)
> So, the point is, I want to "fix" or better re-write the code
> from SMI to get an up-to-date driver for Kernel 2.6.
>
> My question is: Where is a good way to start to learn from
> already existing code? radeonfb or aty128fb or which driver
> is the most current and Kernel 2.6 aware driver.

Drivers that has somewhat busy changelogs are radeonfb and rivafb. atyfb
recently had a pretty massive rewrite.  savagefb is a driver that was recently
introduced in 2.6, so it probably does not have any leftovers from 2.4 code.
intelfb is also another one, just recently ported to 2.6.

Tony




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