topic Re: imx6q camera preview failed in i.MX Processors

imx6q camera preview failed

dirtyrain — Thu, 18 May 2017 02:24:54 GMT

platform : imx6q android

After porting camera driver, there is the camera.apk showed in lanucher.Opened the apk, there is no preview image, as showed blew.

Here is the kernel.log and logcat.log

Can you tell me how to debug this issue???

Original Attachment has been moved to: kernel.log.zip

Original Attachment has been moved to: log20170526.rar

Original Attachment has been moved to: logcat.log.zip

Re: imx6q camera preview failed

dirtyrain — Thu, 18 May 2017 11:45:55 GMT

I have measure the MIPI singal, output normal .So I thought it was because of the platform. Maybe I forgot some confirgrations.Does anyone can help???

Re: imx6q camera preview failed

joanxie — Fri, 19 May 2017 09:18:02 GMT

if you use mipi camera, first ,pls refer to the enclosed file to check if your mipi setting is correct or not, then you can use the unit test to test the camera.

Re: imx6q camera preview failed

dirtyrain — Fri, 19 May 2017 09:26:47 GMT

Thanks for your reply, let me check it out and feeding back to you ASAP.

Re: imx6q camera preview failed

dirtyrain — Fri, 19 May 2017 10:01:33 GMT

Dear Joan,

Could you please show me the way about unit test????

Re: imx6q camera preview failed

dirtyrain — Mon, 22 May 2017 03:06:56 GMT

Dear Joan，

after check ，the mipi single is output and reviced. But it split for 4 parts, how to debug this issue???

Re: imx6q camera preview failed

joanxie — Tue, 23 May 2017 07:28:50 GMT

did you use rgb565 interlaced mode? if yes, pls check if you set the correct register, for unit test, you can find it in the bsp.

Re: imx6q camera preview failed

dirtyrain — Tue, 23 May 2017 07:46:16 GMT

No, I use the yuv422.

BTW, I find there is no use to change fmt setting V4L2_PIX_FMT_UYVY/V4L2_PIX_FMT_YVYU/...

Did we support the yuv422 pixel fmt for changing?????

Re: imx6q camera preview failed

dirtyrain — Fri, 26 May 2017 01:23:49 GMT

Dear Joan,

Now I found the camera progress hung at the (\kernel_imx\driver\mxc\ipu3\ipu_device.c):

static int ipu_task_thread(void *argv)
{...

line3245:            printk("befor wait event interrupt...\n");
                           wait_event_interruptible(thread_waitq, find_task(&tsk, curr_thread_id));
                           printk("after wait event interrupt...\n");

...

}

always waiting event interrupt, is this the normal issue??????

Re: imx6q camera preview failed

joanxie — Fri, 26 May 2017 09:07:50 GMT

mipi can support yuv422, could you tell me what mx6q board you use and andorid bsp? and send the log file to check.

Re: imx6q camera preview failed

dirtyrain — Fri, 26 May 2017 09:42:34 GMT

Dear Joan,

Here is the "log20170526.rar" , including logcat "logcat.txt" and kernel mesg "driver.txt".

We use the board imx6qbresd, and android bsp "The i.MX Android. L5.0.0_1.0.0-ga ".

Thx

Re: imx6q camera preview failed

dirtyrain — Wed, 31 May 2017 07:58:02 GMT

Dear Joan,

After I changed the ipu_id from 0 to 1, there was ipu task in kernel log. But the preview couldn't work any more, there was no data after previewing.And the log said, "ERROR: v4l2 capture: mxc_p4l_dqueue timeout enc_counter 0".

How to slove this issue?????Here is the kernel log in "20170531.rar".

Re: imx6q camera preview failed

dirtyrain — Thu, 01 Jun 2017 09:26:18 GMT

Thanks for Joan's supporting, I have fixed the issue.It's because of using wrong ipu. Changing from ipu1 to ipu0, it works normally.