topic Re: About preview function in i.MX6SL. in i.MX Processors

About preview function in i.MX6SL.

keitanagashima — Fri, 18 Sep 2015 04:14:30 GMT

Dear All,

Hello. I tested the preview function on MCIMX6SLEVK.

But, the preview didn't function.

Could you tell me the how to preview on MCIMX6SLEVK?

[Board] : MCIMX6SLEVK (LCD: MCIMX28LCD)

[Camera] : OV5642 module

[Image] : L3.10.53_1.0.0 (PreBuild Image)

[gst-launch command line]

$ modprobe ov5642_camera

$ modprobe mxc_v4l2_capture

$ gst-launch-1.0 imxv4l2src device=/dev/video0 ! 'video/x-raw,format=(string)UYVY,width=640,height=480,framerate=(fraction)30/1' ! imxv4l2sink

[Error message]

Can't get caps from capture device, use the default setting.

Perhaps haven't capture device.

====== IMXV4L2SRC: 4.0.2 build on Jan 5 2015 13:31:02. ======

set color key:00010203

====== IMXV4L2SINK: 4.0.2 build on Jan 5 2015 13:31:02. ======

WARNING: erroneous pipeline: could not link imxv4l2src0 to imxv4l2sink0

Best Regards,

Keita

Re: About preview function in i.MX6SL.

Yuri — Fri, 18 Sep 2015 05:47:38 GMT

Keita, hi !

Perhaps the issue relates to the fact, that CSI and EPDC hardware cannot be used
simultaneously, because these two modules share the same pins on the EVK board.

The board file in BSP configures these pins for proper function through DTS.

Use imx6sl-evk.dts for EPDC, and imx6sl-evkcsi.dts for CSI.

Please take a look at Table 3 (Kernel and device tree configurations) of

"i.MX_Linux_Release_Notes.pdf" in order to select proper demo images.

Have a great day,
Yuri

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Re: About preview function in i.MX6SL.

keitanagashima — Fri, 18 Sep 2015 06:20:56 GMT

Dear Yuri,

Hello. Thank you for your advice.

I replace the dtb file and i.MX6SL preview was success!

Best Regards,

Keita

Re: About preview function in i.MX6SL.

keitanagashima — Mon, 19 Oct 2015 07:32:40 GMT

Dear Yuri,

Hello.

i.MX6SL preview was success on L3.10.53_1.0.0.

But, on L3.14.28_1.0.0, it was not possible to preview. (I tested the my built image and pre-build image.)

Of cause, I replaced the dtb file from imx6sl-evk.dtb to imx6sl-evk-csi.dtb and changed the "fdt_file" parameter.

Please tell me the how to operate the parallel camera(ov5642) on L3.14.28.

I found the difference of boot log between L3.14.28 and 3.10.53.

OV5642 was found on L3.10.53.

[Boot log on L3.10.53_1.0.0]

ov5640 2-003c: cannot get io voltage

camera ov5640 is not found

ov5642_power_on: cannot get io voltage error

camera ov5642 is found

FAT-fs (mmcblk1p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.

Starting Bootlog daemon: bootlogd: cannot allocate pseudo tty: No such file or directory

[Boot log on L3.14.28_1.0.0]

Starting udev

udevd[126]: starting version 182

2-003c supply DOVDD not found, using dummy regulator

camera ov5640 is not found

random: nonblocking pool is initialized

bootlogd: cannot allocate pseudo tty: No such file or directory

ALSA: Restoring mixer settings...

Found hardware: "wm8962-audio" "" "" ""

[gst-launch command line on L3.14.28_1.0.0 ]

$ modprobe ov5642_camera

$ modprobe mxc_v4l2_capture

$ gst-launch-1.0 imxv4l2src device=/dev/video0 ! 'video/x-raw,format=(string)UYVY,width=640,height=480,framerate=(fraction)30/1' ! imxv4l2sink

[Error Message on L3.14.28_1.0.0]

(gst-launch-1.0:837): GStreamer-CRITICAL **: gst_caps_simplify: assertion 'GST_IS_CAPS (caps)' failed

(gst-launch-1.0:837): GStreamer-CRITICAL **: gst_caps_append: assertion 'GST_IS_CAPS (caps2)' failed

====== IMXV4L2SRC: 4.0.3 build on Jul 6 2015 18:41:32. ======

set color key:00010203

====== IMXV4L2SINK: 4.0.3 build on Jul 6 2015 18:41:32. ======

WARNING: erroneous pipeline: could not link imxv4l2src0 to imxv4l2sink0

Best Regards,

Keita

Re: About preview function in i.MX6SL.

Yuri — Mon, 26 Oct 2015 08:47:29 GMT

Hello,

Does L3.14.28 image supports GUI ? Perhaps minimal image was used ?

Regards,

Yuri.

Re: About preview function in i.MX6SL.

keitanagashima — Mon, 26 Oct 2015 23:47:49 GMT

Hi Yuri,

I tested qt5 image.

My build image and pre-build image didn't operate correctly.

Best Regards,

Keita

Re: About preview function in i.MX6SL.

keitanagashima — Mon, 02 Nov 2015 05:46:30 GMT

Dear Yuri,

Do you have any update? Please give me a status of analysis.

My customer is very hurry.

Please send your answer ASAP.

When can I get your answer?

Best Regards,

Keita

Re: About preview function in i.MX6SL.

Yuri — Mon, 02 Nov 2015 09:03:31 GMT

Hi,

Please check if in kernel boot parameters "csi" is mentioned, and any

refers to EPDC are removed.

Regards,

Yuri.

Re: About preview function in i.MX6SL.

keitanagashima — Wed, 04 Nov 2015 07:37:55 GMT

Dear Yuri,

Hello. I added the "csi" parameter in mmcargs.

But, the OV5642 wasn't recognized by i.MX6.

I think that .dtb (.dts) is wrong in L3.14.28 for i.MX6SLEVK.

Please tell me the how to operate the OV5642 in L3.14.28.

We must resolve the issue asap.

Best Regards,

Keita

Re: About preview function in i.MX6SL.

keitanagashima — Thu, 05 Nov 2015 09:01:09 GMT

Hi Yuri,

I confirmed the IOMUX setting between L3.10.53_1.1.0 and L3.14.28_1.0.0 after boot-up kernel.

But, the difference wasn't seen.

Refer to attached file.

How is it possible to operate OV5642 with L3.14.28_1.0.0?

Best Regards,

Keita

Re: About preview function in i.MX6SL.

Yuri — Fri, 06 Nov 2015 05:23:40 GMT

Hi,

I forwarded request to the team.

About preview function in i.MX6SL EVK under L3.14.28_1.0.0

Regards,

Yuri

Re: About preview function in i.MX6SL.

robby — Wed, 11 Nov 2015 07:28:53 GMT

ov5642 is EOL, 3.14 BSP does not support ov5642 again.

And another important thing is from 3.14, the camera driver adopts the v4l2 subdev framework.

So you may refer to the new ov5640 driver to make the ov5642 to work. It's fairly easy.

Regards,
Robby

Re: About preview function in i.MX6SL.

keitanagashima — Wed, 11 Nov 2015 10:42:56 GMT

Dear Dongjun Cai,

> ov5642 is EOL, 3.14 BSP does not support ov5642 again.

The OV5642 could operate on i.MX6Q SABRE-SDP with 3.14 BSP.

But, on i.MX6SL EVK, OV5642 didn't operate and wasn't recognized.

>And another important thing is from 3.14, the camera driver adopts the v4l2 subdev framework.

>So you may refer to the new ov5640 driver to make the ov5642 to work. It's fairly easy.

Please give me a detail steps to work OV5642 (Parallel camera).

Best Regards,

Keita

Re: About preview function in i.MX6SL.

robby — Wed, 11 Nov 2015 10:53:57 GMT

Keita,

i.MX6Q uses the different camera interface (work with IPU), while i.MX6SL use CSI ( no IPU).

only the latter uses the V4L2 SubDev framework, you can compare the ov5640 source file between 3.10 and 3.14 and then map the change to 3.14 for ov5642.

Regards,
Robby

Re: About preview function in i.MX6SL.

robby — Wed, 11 Nov 2015 11:00:36 GMT

in 3.14 kernel, for ov5640 driver using v4l2 subdev:

drivers/media/platform/mxc/subdev/ov5640.c

Re: About preview function in i.MX6SL.

keitanagashima — Thu, 12 Nov 2015 08:48:17 GMT

Hi Dongijun,

Thank you for your information.

I looked the ov5640.c (in L3.14.28) and ov5642.c (in L3.10.53).

But, a lot of differences were seen.

(It doesn't look fairly easy.)

Please make the driver for OV5642 with L3.14.28 on your side?

Our customer is urging us to fix this issue.

(The "camera support" is described in the release note. So, my customer's project has been started with L3.14.28.)

Best Regards,

Keita

Re: About preview function in i.MX6SL.

karina_valencia — Wed, 18 Nov 2015 02:56:50 GMT

robby please continue with the follow up,

Re: About preview function in i.MX6SL.

robby — Wed, 18 Nov 2015 12:02:26 GMT

Hi Karina,

We are now busy with NPI projects and have no resource to support this. Could you please ask AE to support this?

Re: About preview function in i.MX6SL.

karina_valencia — Wed, 18 Nov 2015 15:13:31 GMT

Qiang_FSL are you able to continue with the follow up here?

Re: About preview function in i.MX6SL.

qiang_li-mpu_se — Fri, 20 Nov 2015 09:37:20 GMT

FYI