Re: ADV7180 Capture with i.MX53

[Ian Arkver <ian.arkver.dev@gmail.com>]

On 08/10/2019 18:14, Steve Longerbeam wrote:
> 
> 
> 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.

Seems to me initial corrupt frames would produce a fixed offset of some 
kind. A rolling video like that looks more like the number of lines 
being captured is wrong.

Regards,
Ian.
> 
> Steve
> 
>