topic Re: imx6ul adv7181 problem in i.MX Processors

imx6ul adv7181 problem

lemficb — Wed, 01 Nov 2017 09:06:58 GMT

Hi all,

I have troubled with my imx6ul camera for some days. I used adv7181 on my imx6ul custom board, now ,I have already moved the 7181's driver to my 4.1.15 BSP. The driver is refer to the adv7180.c , and now , the device has been already registerd, the signal of clock and adv7181's 8 output data signals are all right . But when I use '/unit_tests/mx6s_v4l2_capture.out -m 0 -d /dev/video0' to test my driver, there is a error log just like this

'Found v4l2 capture device /dev/video0.
VIDIOC_S_PARM failed'

I am not sure whether my test method is wrong or my driver have some other problems. Someone could give me some advices?

With my best regards

Jun

Re: imx6ul adv7181 problem

igorpadykov — Wed, 01 Nov 2017 23:12:00 GMT

Hi 龚军龚

could you try attached patch.

Best regards
igor
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Re: imx6ul adv7181 problem

lemficb — Thu, 02 Nov 2017 02:15:02 GMT

igorpadykov, thanks your quick reply .

Re: imx6ul adv7181 problem

lemficb — Thu, 02 Nov 2017 08:25:25 GMT

Hi igorpadykov,

I have already put your patch to my kernel. But when I build the adv7180 driver , I found that there is no definition of "enum_framesizes",''enum_frameintervals" and "g_std" in the "static struct v4l2_subdev_video_ops " and "static struct v4l2_subdev_core_ops " struct. So I remove these three member variable, and the driver can be complied by.

I used the file "mx6s_v4l2_capture.c" to test ,and the camera have some problem. I don't know whether the driver i removed may lead to this problem. I can detect the adv7181 device and the adv7181's output data also have signal.

Here is the test result.

root@imx6ulevk:~# ./camera_test -ow 320 -oh 240 -m 1 -d /dev/video0
Found v4l2 capture device /dev/viadv7180_s_parm: enter adv7180_s_parm
deo0.
pixelformat (output by camera): UYVY
get capture mode 1 framesize failed

Best regards

Jun

Re: imx6ul adv7181 problem

igorpadykov — Thu, 02 Nov 2017 11:32:36 GMT

Hi Jun

seems these are standard V4L2 VIDIOC_ENUM_xx ioctl structures.

Best regards
igor