ADV7180 on imx6 quad

[meflo]

Hi everybody. I am trying to get the ADV7180 board to work with the imx6 quad board.

However, when trying to capture data using mxc_v4l2_capture app I get some error:

v4l2 capture: mxc_v4l_dqueue timeout enc_counter 0

Looks like it does not get to see any data on the parallel data bus. I am not using HSYNC and VSYNC, just the 8 data pins for parallel video camera capture. I've been looking for related posts about my error and I see quite a few people experiencing this timeout issue that I get. Closest related issue to my problem seems to be at: https://community.freescale.com/docs/DOC-97981 but still I see that thread as closed and not much progress. Any pointers if this is somewhat related to EAV/SAV setup since I am not using HSYNC and VSYNC? Any pointers would be much appreciated.

Thank you.

[meflo]

Hi Weidong,

thanks for your feedback. I will check and get back with the results.

[rogerio_silva]

Hi meflo

To capture image from ADV7180, use the unit test mxc_v4l2_tvin instead mxc_v4l2_capture. The tvin app will properly de-interlace the image.

[meflo]

Hi Rogerio,

thanks for the input. I'll give it a try when I have the hardware fixed and get back with a response here.

Thank you all for your support.

[meflo]

P.S.: I also do not have PIXCLK. Could this cause problems? Should EAV/SAV be setup implicitly in the kernel adv7180 driver?

Another note is that I am using IPU2 CSI1 for parallel communication, and for this I've setup GPR 20 to 1 which enables the parallel interface on IPU2 CSI1.

Thanks.

[weidong_sun · Accepted solution]

Hello, Meton,

      If PIXCLK( Pin name on ADV7180 is LLC) doesn't output, It means ADV7180 doesn't work. In our linux BSP and android BSP, ADV7180 drvier is supported , YUV and BT.656 format are both supported. You only need select adv7180 driver for your kernel compiling.

      So please check if issue was generated by hardware.

Regards,

Weidong

[yuanlu837]

hello Weidong Sun：

我们公司的imx6q板子是自己制作的，目前我在调试adv7180+imx6q的驱动，我用mxc_v4l2_tvin.out程序，显示屏中显示的画面在垂直方向上一直滚动，请问是什么原因。