[yocto] [meta-raspberrypi][PATCH 5/8] Support for vc4 graphics driver: upgrade 4.4 kernel to 4.4.10

[Herve Jourdain]

Hi Andreas,

Don't worry about "misunderstanding" on my part, I actually value other people's input. I started this for some needs I had, I'm happy to share it, but I'm also not able to test it in all configurations, and I might overlook some other people's needs, so I'm fine with suggestions.
There have been changes recently regarding HDMI handling by the vc4 driver, but I'm not sure if changing the screen resolution is supported/working.
I may try to test it, do you have some settings in mind that I should test?

Herve

-----Original Message-----
From: Andreas Müller [mailto:schnitzeltony at googlemail.com] 
Sent: jeudi 19 mai 2016 08:28
To: Herve Jourdain <herve.jourdain at neuf.fr>
Cc: Khem Raj <raj.khem at gmail.com>; Yocto Project <yocto at yoctoproject.org>
Subject: Re: [yocto] [meta-raspberrypi][PATCH 5/8] Support for vc4 graphics driver: upgrade 4.4 kernel to 4.4.10

On Thu, May 19, 2016 at 7:21 AM, Herve Jourdain <herve.jourdain at neuf.fr> wrote:
> Hi Andreas,
>
> I've been able to do some testing with the latest 4.1 kernel.
> So it can actually "work" in a way, but both the device tree overlay and the driver in the kernel are "old".
> This has an impact on stability: I can definitely start wayland/weston, and it's "responsive", BUT after I started playing out with the demo applications, it quickly crashed...
> So we could either try to backport the newer driver / dt overlay to the 4.1, which could be possible, or we could just support vc4graphics only for 4.4.10+...
>
> Since 4.1 is not heavily maintained anymore on github, since 4.4 is now the default revision on github, and since development branches for 4.5 and 4.6 are already there on github, I would personally be inclined to support vc4graphics only for 4.4.10+...
> And I would also be in favor of moving the default version of the kernel to the 4.4 series...
>
> What do you think is the best option there?
>
No need to backport to 4.1. 4.4 is fine. One question: are you able to change screen resolution for HDMI monitor (elder sdl fullscreen games need that)? This was not possible for kernel 4.1.

Just to avoid misunderstandings: I like this patch series very much and would be happy to see it applied.

Andreas