Re: ADV7180 Capture with i.MX53

[Steve Longerbeam <slongerbeam@gmail.com>]

On 10/8/19 9:55 AM, Tim Harvey wrote:
> On Tue, Oct 8, 2019 at 4:21 AM Fabio Estevam <festevam@gmail.com> wrote:
>> On Mon, Oct 7, 2019 at 10:07 PM Fabio Estevam <festevam@gmail.com> wrote:
>>
>>> So now I need to see if I can get Gstreamer to accept a pipeline like:
>>>
>>> gst-lauch-1.0 v4l2src ! kmssink
>> Ok, so now I decided use the hardware video deinterlacer:
>>
>> media-ctl -l "'adv7180 1-0021':0 -> 'ipu1_csi0':0[1]"
>> media-ctl -l "'ipu1_csi0':1 -> 'ipu1_vdic':0[1]"
>> media-ctl -l "'ipu1_vdic':2 -> 'ipu1_ic_prp':0[1]"
>> media-ctl -l "'ipu1_ic_prp':2 -> 'ipu1_ic_prpvf':0[1]"
>> media-ctl -l "'ipu1_ic_prpvf':1 -> 'ipu1_ic_prpvf capture':0[1]"
>>
>> media-ctl -V "'adv7180 1-0021':0 [fmt:UYVY2X8/720x480 field:alternate]"
>> media-ctl -V "'ipu1_csi0':1 [fmt:AYUV32/720x480]"
>> media-ctl -V "'ipu1_vdic':2 [fmt:AYUV32/720x480 field:none]"
>> media-ctl -V "'ipu1_ic_prp':2 [fmt:AYUV32/720x480 field:none]"
>> media-ctl -V "'ipu1_ic_prpvf':1 [fmt:AYUV32/720x480field:none]"
>>
>> And then Gstreamer can be launched:
>>
>> # gst-launch-1.0 v4l2src device=/dev/video2 ! kmssink --verbose
>> Setting pipeline to PAUSED ...
>> Pipeline is live and does not need PREROLL ...
>> /GstPipeline:pipeline0/GstKMSSink:kmssink0: display-width = 800
>> /GstPipeline:pipeline0/GstKMSSink:kmssink0: display-height = 480
>> Setting pipeline to PLAYING ...
>> New clock: GstSystemClock
>> /GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps =
>> video/x-raw, format=(string)YUY2, width=(int)720, height=(int)480,
>> framerate=(fraction)25/1, colorimetry=(string)bt601,
>> interlace-mode=(string)progressive
>> /GstPipeline:pipeline0/GstKMSSink:kmssink0.GstPad:sink: caps =
>> video/x-raw, format=(string)YUY2, width=(int)720, height=(int)480,
>> framerate=(fraction)25/1, colorimetry=(string)bt601,
>> interlace-mode=(string)progressive
>>
> Fabio,
>
> Yes, you need to use the vdic to capture from adv7180 with gstreamer
> as it can't handle alternate.
>
>> However the video looks like a broken old TV scrolling the image horizontally:
>> https://www.dropbox.com/s/2yef8egn6s8z7ff/mx53_adv7180_capture.mp4?dl=0
>>
> This would be because of the initial corrupt frames that this and many
> other decoders produce while waiting for proper sync. I added
> 'g_skip_frames' support in 9483a3f8e1b58ba1d7cd21687d8d0a63a015c36b
> but I'm not sure how to get gstreamer to use it?
>
> I still carry around a patch from Steve for imx-csi that drops first
> few frames from BT656 sources:
> https://github.com/Gateworks/linux-imx6/commit/959fbd42ee6433f49ef4a04fb1abe8f8c78db5ad
> to deal with this.

Yes, that's likely the issue, from a look at Fabio's video. The patch 
referenced by Tim hard-codes the number of frames to skip, instead of 
calling the adv7180's g_skip_frames op. I still don't have an answer as 
to how to call the adv7180 from the CSI subdev.

Steve