Re: omap3isp device tree support

[Florian Vaussard <florian.vaussard@epfl.ch>]

Hello Enrico,

On 12/06/2013 11:54 AM, Enrico wrote:
> On Fri, Dec 6, 2013 at 11:31 AM, Florian Vaussard
> <florian.vaussard@epfl.ch> wrote:
>> Hello,
>>
>> On 12/06/2013 11:13 AM, Enrico wrote:
>>> Hi,
>>>
>>> i know there is some work going on for omap3isp device tree support,
>>> but right now is it possible to enable it in some other way in a DT
>>> kernel?
>>>
>>
>> The DT support is not yet ready, but an RFC binding has been proposed.
>> It won't be ready for 3.14.
>>
>>> I've tried enabling it in board-generic.c (omap3_init_camera(...) with
>>> proper platform data) but it hangs early at boot, do someone know if
>>> it's possible and how to do it?
>>>
>>
>> I did the same a few days ago, and went through several problems
>> (panics, half DT support,...). Now I am able to probe the ISP, I still
>> have one kernel panic to fix. Hope to send the patches in 1 or 2 days.
>> We are still in a transition period, but things should calm down in the
>> coming releases.
>>

So I converted the iommu to DT (patches just sent), used pdata quirks
for the isp / mtv9032 data, added a few patches from other people
(mainly clk to fix a crash when deferring the omap3isp probe), and a few
small hacks. I get a 3.13-rc3 (+ board-removal part from Tony Lindgren)
to boot on DT with a working MT9V032 camera. The missing part is the DT
binding for the omap3isp, but I guess that we will have to wait a bit
more for this.

If you want to test, I have a development tree here [1]. Any feedback is
welcome.

Cheers,

Florian

[1] https://github.com/vaussard/linux/commits/overo-for-3.14/iommu/dt