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ADV7281-MA on IMX6 bad capture

Question asked by Sebastian Panceac on Dec 3, 2015
Latest reply on Jan 6, 2016 by Sebastian Panceac

Hello,

 

I have an ADV7281-MA connected via MIPI-CSI2 interface to the IMX6Q with 1 CSI data lane.

I'm using the 3.10.63 kernel version.

I can capture NTSC or PAL video with the mxc_v4l2_tvin.out binary but the image is divided in two by a vertical line, it has bad colors and is scrolling vertically.

 

The ADV7281 has the following output according to the the datasheet:

All ADV728x devices (MIPI CSI-2 or TTL output models) output video data in YCbCr 4:2:2 format. The video timing is compliant with the ITU-R BT.656-3 or ITU-R BT.656-4 standards.

 

I am aware of the thread Some Experience When Enable MIPI Camera and I have set the CSI2_PHY_TST_CTRL1 register to the correct value.

I use a modified version of the adv7180.c driver to test it.

Video capture is on the IPU0, CSI1 interface, and the virtual channel that I use is 1.

The pixel format in the driver is: "adv7180_data.sen.pix.pixelformat = V4L2_PIX_FMT_UYVY;  /* YUV422 */"

Since the output from ADV7281 is interlaced(480i or 576i) I also modified the current clock to 0 so I can capture interlaced output: "p->u.bt656.clock_curr = 0;"

 

Do you know what could cause the bad capture?

 

Thank you!

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