[maemo-developers] kernel patches, Re: DSP framebuffer access on N8x0

[From: Frantisek Dufka]

Simon Pickering wrote:
> This requires two things, a kernel patch, and adding a FRAMEBUFFER section
> to the /lib/dsp/avs_kernelcfg.cmd file. See
> https://bugs.maemo.org/show_bug.cgi?id=3123 for the patch.

Nice. I've been thinking about garage project named kernel-hacks or 
something, that would accumulate interesting kernel patches and even 
have some pre-built kernels with those patches applied.

The reason is that there are already quite a few interesting kernel 
patches and it is hard to keep track of them. Of course it would make 
sense only if people doing some kernel hacking would actually join such 
project and submit patches and optionally build kernel images with some 
subset or all the patches.

Opinions? Is it needed? Would you (actively) participate? Any better 
solutions (git tree)? Or we can still keep them scattered across 
bugzilla and internet.

So far I know about following additional patches (feel free to add other 
stuff I missed, as I said it is hard to track all of them):

- framebuffer rotation
http://sse2.net/rotate/
http://labs.vivi.eng.br/blog/?p=39

- japanese FM bands for N800 tuner
https://bugs.maemo.org/show_bug.cgi?id=2249

- high speed (48MHZ) SD/MMC
http://intr.overt.org/blog/

- patches that run N8x0 DSP/CPU at 133/400 when playing audio

- my (mostly 770) stuff - extended brightness control, mmcplus, sdhc, 
tearsync, yuv420 mode
http://fanoush.wz.cz/maemo/

Some of them could be merged to mainline or Nokia kernel but many of 
them are just quick hacks of debatable value and correctness with little 
chance of merging to some official tree.

Maybe some public GIT tree would be better but I'm not familiar with 
GIT. And also I don't have 24/7 online server for this anyway.

I also thought about starting someting similar directly on 
http://fanoush.wz.cz/maemo/ but I don't want to hijack other people's 
stuff and it is free hosting so it is not safe, it can vanish anytime. 
Also recently I have become a bit slow due to busy real life so having 
more people for maintenance would be nice :-)

Frantisek