Re: [PATCH] media: imx.rst: Update the imx6-sabreauto ADV7180 instructions

[Steve Longerbeam <slongerbeam@gmail.com>]

On 10/16/19 6:04 AM, Fabio Estevam wrote:
> Hi Steve,
>
> On Tue, Oct 15, 2019 at 10:18 PM Steve Longerbeam <slongerbeam@gmail.com> wrote:
>
>> Here's a quick example that uses the end-of-frame method to measure fi's
>> (all other FIM controls are left at the default values):
>>
>> v4l2-ctl -d0 --set-ctrl=fim_enable=1
>> # disable input capture method
>> v4l2-ctl -d0 --set-ctrl=fim_input_capture_edge=0
>> v4l2-ctl -d0 --stream-mmap
> What needs to be done for 'fim_enable' to be available?
>
> I am using a mx6dl-sabreauto, and this is what I get:
>
> # v4l2-ctl -d2 --set-ctrl=fim_enable=1
> unknown control 'fim_enable'

If /dev/video2 is the "ipu1_ic_prpvf capture" node, it's because FIM is 
not yet available on those nodes. The FIM is only available on the 
"ipuX_csiY capture" nodes. It's on my plate to fix that.

But also remember that the FIM controls are inherited from the ipuX_csiY 
subdevices when the link from ipuX_csiY is enabled, so while the 
controls are always available on ipuX_csiY, they become available on 
"ipuX_csiY capture" nodes when the link is enabled.

Steve