Re: [PATCH] drm/rockchip: support prime fd import

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Hi,

On 24 February 2016 at 16:01, Emil Velikov <emil.l.velikov@xxxxxxxxx> wrote:
> On 23 February 2016 at 23:56, Rob Clark <robdclark@xxxxxxxxx> wrote:
>> On Tue, Feb 23, 2016 at 6:29 PM, Emil Velikov <emil.l.velikov@xxxxxxxxx> wrote:
>>> On 2 February 2016 at 23:37, Zach Reizner <zachr@xxxxxxxxxx> wrote:
>>>> The prime fd to handle ioctl was not used with rockchip before. Support
>>>> was added in order to support potential uses (e.g. zero-copy video
>>>> decode, camera).
>>>>
>>> Similar patch came around a few months ago and got this reply [1]. If
>>> the situation has changed (there is an open-source driver/user for
>>> this) it should be clearly mentioned in the commit message, as opposed
>>> to "in order to support potential uses".
>>>
>> I'm not sure, maybe those platforms can do a basic v4l <-> display
>> thing w/ prime.  Although upstream tends to hurt a bit for camera
>> support..
>>
> It a bit unfortunate indeed. I wonder if companies cannot put more
> pressure on vendors to get things open/upstream - hint, hint ;-)
>
> Wanted: Dead or alive - [upstream] open-source users :-P

V4L (media decode rather than camera IIRC) is indeed possible; there's
a driver in the chromeos-3.18 downstream tree, and there's active work
going on to get that included in mainline. So that would be a good
user.

Cheers,
Daniel
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