[libcamera-devel] PinePhone needs S_FRAME_INTERVAL

[Jacopo Mondi]

Hi Pavel,

On Tue, Jul 05, 2022 at 10:56:06PM +0200, Pavel Machek wrote:
> Hi!
>
> > > It looks I solved another mystery: Top resolution was not available,
> > > and depending on order of commands, sometimes 1280x720 was not
> > > available, either.
> > >
> > > So I took a look into megapixels, and mystery solved -- libcamera is
> > > not setting frame intervals at all.
> > >
> > > AFAICT that needs to happen. PinePhone needs lower fps for top
> > > resolution, but an use high fps for lower resolutions...
> > >
> > > This is obviosly a hack, but we need something like that.
> > >
> >
> > Can I ask a stupid question ? Is the sun6i a parallel or CSI-2
> > receiver ? If you're using my ov5640 branch (patches will land
> > upstream in 5.20) the need to set frame_interval to work around a
> > driver deficiency is now only for parallel setups. CSI-2 platforms have
> > been switched to use VBLANK to control the frame rate.
>
> I'm not really sure how to tell the difference. media-ctl mentions
> csi:

No worries, if you can't update the kernel it doesn't make a
difference. I thought you were using the same kernel as Rafael with
the ov5640 patches in. If you're on the current driver version you
need the awkward s_frame_interval dance.

>
> mobian at mobian:~/g/libcamera$ sudo media-ctl -p -d /dev/media1
> Media controller API version 5.15.44
>
> Media device information
> ------------------------
> driver          sun6i-csi
> model           Allwinner Video Capture Device
> serial
> bus info        platform:1cb0000.csi
> hw revision     0x0
> driver version  5.15.44
>
> Device topology
> - entity 1: sun6i-csi (1 pad, 2 links)
>  type Node subtype V4L flags 0
>  device node name /dev/video2
>  pad0: Sink
>  <- "gc2145 3-003c":0 []
>  <- "ov5640 3-004c":0 [ENABLED]
>
> I'm using "Linux mobian 5.15-sunxi64 #1 SMP Tue Jun 7 01:08:50 UTC 2022
> aarch64 GNU/Linux" kernel from mobian, and can not really change it
> easily at the moment.
>
> Best regards,
> 								Pavel
> --
> People of Russia, stop Putin before his war on Ukraine escalates.


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