Setting up the links for imx7-mipi-csis

Setting up the links for imx7-mipi-csis

[Fabio Estevam]

Hi Rui,

I am trying to get a OV5645 camera to work with a imx7d-pico board on
linux-next 20190628.

Here is the log:

[    0.285361] videodev: Linux video capture interface: v2.00
[    3.684025] csi: Registered csi capture as /dev/video0
..
[    3.689618] imx-media: subdev csi bound
[    4.055676] imx-media: imx7-mipi-csis.0:1 -> csi-mux:1
[    4.061032] imx-media: csi-mux:2 -> csi:0
[    4.065339] imx-media: ov5645 3-003c:0 -> imx7-mipi-csis.0:0

I try to follow the instructions from
Documentation/media/v4l-drivers/imx7.rst to setup the links, which
would be the following for imx7d-pico:

   media-ctl -l "'ov5645 3-003c':0 -> 'imx7-mipi-csis.0':0[1]"
   media-ctl -l "'imx7-mipi-csis.0':1 -> 'csi_mux':1[1]"
   media-ctl -l "'csi_mux':2 -> 'csi':0[1]"
   media-ctl -l "'csi':1 -> 'csi capture':0[1]"

The first command succeeds, but the second one fails:

# media-ctl -l "'imx7-mipi-csis.0':1 -> 'csi_mux':1[1]"
Unable to parse link: Invalid argument (22)

Any ideas, please?

Thanks,

Fabio Estevam

Re: Setting up the links for imx7-mipi-csis

[Fabio Estevam]

Hi Rui,

On Fri, Jun 28, 2019 at 7:03 PM Fabio Estevam <festevam@gmail.com> wrote:

> The first command succeeds, but the second one fails:
>
> # media-ctl -l "'imx7-mipi-csis.0':1 -> 'csi_mux':1[1]"
> Unable to parse link: Invalid argument (22)

I have also tested it on a imx7s-warp and I got the same error.

Please let me know if you have any ideas on how to solve this problem.

Thanks

Re: Setting up the links for imx7-mipi-csis

[Sakari Ailus]

Hi Fabio,

On Fri, Jun 28, 2019 at 10:12:21PM -0300, Fabio Estevam wrote:
> Hi Rui,
> 
> On Fri, Jun 28, 2019 at 7:03 PM Fabio Estevam <festevam@gmail.com> wrote:
> 
> > The first command succeeds, but the second one fails:
> >
> > # media-ctl -l "'imx7-mipi-csis.0':1 -> 'csi_mux':1[1]"
> > Unable to parse link: Invalid argument (22)
> 
> I have also tested it on a imx7s-warp and I got the same error.
> 
> Please let me know if you have any ideas on how to solve this problem.

What does media-ctp -p say?

-- 
Sakari Ailus

Re: Setting up the links for imx7-mipi-csis

[Fabio Estevam]

Hi Sakari,

On Sat, Jun 29, 2019 at 6:13 AM Sakari Ailus <sakari.ailus@iki.fi> wrote:

> What does media-ctp -p say?

Thanks for this hint!

I managed to fix the media-ctl failure by looking at media-ctl -p output.

Documentation/media/v4l-drivers/imx7.rst mentions "csi_mux", but
media-ctl says "csi-mux", so I needed to change it to:

media-ctl -l "'imx7-mipi-csis.0':1 -> 'csi-mux':1[1]"

and then I see no errors after the media-ctl command.

I will send a patch fixing Documentation/media/v4l-drivers/imx7.rst .

Thanks,

Fabio Estevam

Re: Setting up the links for imx7-mipi-csis

[Rui Miguel Silva]

Hi Guys,
On Sat 29 Jun 2019 at 12:42, Fabio Estevam wrote:
> Hi Sakari,
>
> On Sat, Jun 29, 2019 at 6:13 AM Sakari Ailus <sakari.ailus@iki.fi> wrote:
>
>> What does media-ctp -p say?
>
> Thanks for this hint!
>
> I managed to fix the media-ctl failure by looking at media-ctl -p output.
>
> Documentation/media/v4l-drivers/imx7.rst mentions "csi_mux", but
> media-ctl says "csi-mux", so I needed to change it to:
>
> media-ctl -l "'imx7-mipi-csis.0':1 -> 'csi-mux':1[1]"
>
> and then I see no errors after the media-ctl command.
>
> I will send a patch fixing Documentation/media/v4l-drivers/imx7.rst .
>

arriving late to the party. Thanks for the fix. yup, there is a
typo in there. Thanks Sakari.

---
Cheers,
	Rui