Re: i.MX6 status for IPU/VPU/GPU

[Steve Longerbeam <slongerbeam@gmail.com>]

On 09/09/2014 12:52 AM, Hans Verkuil wrote:
> On 09/09/14 09:49, Jean-Michel Hautbois wrote:
>> 2014-08-27 16:23 GMT+02:00 Steve Longerbeam <steve_longerbeam@mentor.com>:
>>
>>> Hi Jean-Michel, Phillip,
>> Hi Steve,
>>
>>> I've done some work on Philipp's June 12 patchset, converting
>>> the CSI driver to a CSI subdev entity, and fixing some issues here
>>> and there. This June 12 patchset doesn't appear to be a fully working
>>> driver, Phillip correct me if I am wrong. I can post this work as it
>>> exists, it is incomplete but compiles.
>> Dos it compile against a 3.17-rc3 kernel :) ?
>>
>>> I've also worked out what I think is a workable video pipeline graph for i.MX,
>>> suitable for defining the entities, pads, and links. Unfortunately I haven't
>>> been able to spend as much time as I'd like on it.
>> This is very interesting, do you have written this somewhere ?
>>
>>> The complete driver I posted to the list does have some minor issues
>>> mostly suggested by Hans Verkuil (switch to new selection API instead
>>> of cropping API for example). It is a full featured driver but it does not
>>> implement the media device framework, i.e. user does not have direct
>>> control of the video pipeline, rather the driver chooses the pipeline based
>>> on the traditional inputs from user (video format and controls).
>>>
>>> If there is interest I can submit another version of the traditional driver
>>> to resolve the issues. But media device is a major rework, so I don't
>>> know whether it would make sense to start from the traditional driver
>>> and then implement media device on top later, since media device
>>> is almost a complete rewrite.
>> I, at least, am interested by this driver, even in its "traditionnal"
>> form :). If you don't want to submit it directly because this is not
>> using media controller, this is ok, you can provide me a git repo in
>> order to get it, or send a patchset.
> Is it possible to create a staging driver? Even if there are bits missing,
> having the code in the kernel as a staging driver would help a lot.

Hi Hans, that's a good idea. I can post it as a staging driver.

The capture driver does require more support in the i.MX IPU driver which is
not yet merged or proposed. Phillip has forwarded most of them to drm-next,
but there are a few more required. I need to post those patches to drm-next
as a first step.

I can start working on converting the driver to staging and addressing
the earlier issues, but posting it to media-tree will need to wait until the IPU
patches are merged, unless I include the IPU patches along with the capture
driver patchset.

Steve