Re: SM501 framebuffer driver

["Ville Syrjälä" <syrjala@sci.fi>]

On Fri, Oct 06, 2006 at 07:25:54PM +0200, Clemens Koller wrote:
> Hello, Bill,
> 
> > Sorry about starting a new thread, but I was referred to this 
> > list/thread by a colleague just a few minutes ago.  (OT: it isn't in the 
> > archives in SF, either!).
> 
> Okay, fine! I'll be glad to join the party because we are using the SM501
> on PCI of an MPC8540 embedded PowerPC.

I'm using an ARM board. The CPU is an Atmel AT91RM9200, and the SM501 is 
connected to it via a CPLD.

> > I hate to play "me too!", but I also have an SM501 framebuffer driver in 
> > a partial state of development.  I'd love to collaborate with others to 
> > get a good version pushed upstream.
> 
> Great! Where shall we collect the code?
> I have some 
> 
> - a working fb driver kernel module
> 	(I did lots of code cleanup, but still needs a lot)

Me too here :) My changes to the original sm501 fb driver include:
 - Use dev_dbg instead of custom macro
 - video= command line parsing
 - Better checking in check_var
 - Started to implement setcolreg and panning, not finished
 - Removed duplicated code
 - Tried to make code more readable :)
 - Maybe something else (I didn't keep track

I also started to write an ALSA driver for the audio part. I wrote the 
basic driver skeleton, and my next step was going to be the 8051, but 
then I got distracted by other stuff. My plan was to start off with some 
very simple code for the 8051 which would just issue an interrupt at 
some interval so I could just see how the CPU<->8051 communication 
works. I'll try dig up the code in case someone wants to take a look.

Like I mentioned in the other thread I also wrote a DirectFB gfxdriver. 
It does basic blitting and filling for now. I tried to make it draw 
lines too but that caused the chip to lock up, and I tried to use alpha 
bleded blits but those seem to make the chip really sluggish to respond.

-- 
Ville Syrjälä
syrjala@sci.fi
http://www.sci.fi/~syrjala/

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