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Re: kernel changes upstreaming status?


On Wednesday 18 January 2012 12:10:35 Jani Monoses wrote:
> Hi,
> > As the others devs already mentioned, AC100 support in mainline is
> > nearly complete. What is missing is the display support. AFAIK, this
> > won't happen in the near furture (or NV or someone else steps up and
> > pulls something out of his hat). Olof Johansson made quick and dirty
> > port of the current driver to 3.2, but I failed to get it working here.
> > This won't be useful for a stable series anyway. Remember the ~600
> > pending patches?
> I remember there were 600 patches mentioned, and I was wondering what
> the effort is to
> sync them up with 3.2. I don't know how many of those are chromeos
> specific vs tegra/ac100 hw bits though.

I think most of them are tegra specific. Porting these to 3.2 would require 
some understanding of the hardware/subsystems which I don't have. Not to 
mention the time this effort would require. We really owe much to the chromeos 
team (in case anyone listens)!


> >> In Ubuntu 12.04 the majority of kernel packages will be 3.2 based so a
> >> smaller delta will make
> >> security and bugfix updates for the official distro kernels easier to
> >> apply to the ac100 one,
> >> it being maintained on a best effort basis only.
> > 
> > As it looks now, we have to stick with 3.0 for 12.04. I hope this does
> > not create problems. Chromeos normally follows the stable series (with
> > a small time lag), so security patches and important bugfixes will also
> > go into our kernel tree. But for this to work we would need to release
> > our kernels independantly of the Ubuntu releases. Are all ARM machines
> > (I mean the kernel) updated at once?
> If a 3.2 port is too much effort, then sticking to 3.0 is fine. In
> Ubuntu only OMAP3 and some older
> architectures are released as part of the main kernel source package,
> as they were upstreamed a while ago.
> Most others are on their own schedule depending on vendors and
> Linaro/Ubuntu being able to keep
> up with the newer kernels. All will be at least 3.0 and most will be
> based on 3.2 AFAIK though.
> cheers
> Jani