IMX6Q LINUX CAMERA CAPTURE

[caiyuzheng]

I am programming in linux userspace that capture camera data from CSI interface.my camera sensor is tw9900.and the input signal is NTSC

I meet some program.

1.v4l2 capture API can only work for Block mode. and captue data is rolling.

2. v4l2 overlap mode is useless.

when I use mxc_v4l2_tvin -ow 640 -oh 480

It returns ERROR: v4l2 capture: mxc_v4l_dqueue timeout enc_counter 0

So I write a simple program captured a picture for once.

and the picture turns out

I also notices the overlap mode is just put the v4l2 capture chanel output adress into v4l2 output chanel input adress.

I notice tw9900 output format is BT656 which is no-gate mode. does imx6q CSI support this format? if not . how can I fix this?

[igorpadykov]

Hi caiyu

BT656 is supported in linux with i.MX6Q using ADV7180, example below

IPU2 for CSI parallel camera

for twx cameras one can check

Debuging tw9900 report error:ERROR:v4l2 capture:width or height too small

I.MX6: TW8836_TVIN(BT656) ===> CSI0 (8-Bit / CSI0_DAT12 : CSI0_DAT19)

Best regards

igor

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