IMX6SL EVK with OV5640

[vinothrajm]

Hi,

I had IMX6SLEVK  and connected with  OV5640 Camera Module.  I am using Android Kitkat 4.4.2 from freescale website.

I tested the OV5640 with two ways. But both results are failed.

1. I edit the ../myandroid/device/fsl/evksl/init.rc and compile source myandroid.

	setprop back_camera_name csi
	setprop back_camera_orient 0
	setprop front_camera_name uvc
	setprop front_camera_orient 0

and OV5640 camera detected as /dev/video0 in filesystem .

I open the camera default application in Android. It shows the "Camera error" and "Can't connect the camera".

Log :

root@evk_6sl:/ # logcat | grep cam

W/PackageManager( 2480): Package com.android.camera desires unavailable shared library com.google.android.media.effects; ignoring!

I/ActivityManager( 2480): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.android.camera/.Camera} from pid 2646

I/ActivityManager( 2480): Start proc com.android.camera for activity com.android.camera/.Camera: pid=2932 uid=10028 gids={50028, 1028, 1015}

V/CameraHolder( 2932): open camera 0

I/CameraClient( 2132): Opening camera 0

I/FslCameraHAL( 2132): camera_device open: 0

E/FslCameraHAL( 2132):  can not open camera devpath:

E/CameraClient( 2132): Could not open camera 0: -22

I/CameraClient( 2132): Destroying camera 0

W/CameraBase( 2932): An error occurred while connecting to camera: 0

E/CameraHolder( 2932): java.lang.RuntimeException: Fail to connect to camera service

E/CameraHolder( 2932):  at com.android.camera.CameraHolder.open(CameraHolder.java:131)

E/CameraHolder( 2932):  at com.android.camera.Util.openCamera(Util.java:267)

E/CameraHolder( 2932):  at com.android.camera.Camera$4.run(Camera.java:1100)

V/camera  ( 2932): surfaceChanged. w=592. h=444

I/ActivityManager( 2480): Displayed com.android.camera/.Camera: +834ms

130|root@evk_6sl:/ # logcat | grep HAL

I/FslCameraHAL( 2132): camera_device open: 0

I/FslCameraHAL( 2132): initialize name:uvc, path:

I/FslCameraHAL( 2132): DeviceAdapter:  Create uvc device

E/FslCameraHAL( 2132):  can not open camera devpath:

E/FslCameraHAL( 2132): CameraHal:  DeviceAdapter initialize failed

2. I edit the ../myandroid/device/fsl/evksl/init.rc and compile source myandroid.

	setprop back_camera_name csi
	setprop back_camera_orient 0
	setprop front_camera_name csi
	setprop front_camera_orient 0

and OV5640 camera detected as /dev/video0 in filesystem .

I open the camera default application in Android. It shows the "Camera error" and "Can't connect the camera".

LOG:

root@evk_6sl:/ # logcat | grep cam

W/PackageManager( 2482): Package com.android.camera desires unavailable shared library com.google.android.media.effects; ignoring!

I/ActivityManager( 2482): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.android.camera/.Camera bnds=[137,231][203,297]} from pid 2647

I/ActivityManager( 2482): Start proc com.android.camera for activity com.android.camera/.Camera: pid=2937 uid=10028 gids={50028, 1028, 1015}

V/CameraHolder( 2937): open camera 0

E/CameraService( 2133): CameraService::connect X (pid 2937) rejected (invalid cameraId 0).

W/CameraBase( 2937): An error occurred while connecting to camera: 0

E/CameraHolder( 2937): java.lang.RuntimeException: Fail to connect to camera service

E/CameraHolder( 2937):  at com.android.camera.CameraHolder.open(CameraHolder.java:131)

E/CameraHolder( 2937):  at com.android.camera.Util.openCamera(Util.java:267)

E/CameraHolder( 2937):  at com.android.camera.Camera$4.run(Camera.java:1100)

V/camera  ( 2937): surfaceChanged. w=592. h=444

I/ActivityManager( 2482): Displayed com.android.camera/.Camera: +857ms

I/ActivityManager( 2482): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.android.camera/.Camera bnds=[137,231][203,297]} from pid 2647

V/CameraHolder( 2937): open camera 0

E/CameraService( 2133): CameraService::connect X (pid 2937) rejected (invalid cameraId 0).

W/CameraBase( 2937): An error occurred while connecting to camera: 0

E/CameraHolder( 2937): java.lang.RuntimeException: Fail to connect to camera service

E/CameraHolder( 2937):  at com.android.camera.CameraHolder.open(CameraHolder.java:131)

E/CameraHolder( 2937):  at com.android.camera.Util.openCamera(Util.java:267)

E/CameraHolder( 2937):  at com.android.camera.Camera$4.run(Camera.java:1100)

V/camera  ( 2937): surfaceChanged. w=592. h=444

I/ActivityManager( 2482): Displayed com.android.camera/.Camera: +646ms

^C

Please suggest any suggestion to get camera successfully.

Thanks and regards,

vinothraj.

[weidong_sun]

Hi vinothraj,

    please confirm the following items:

(1) check if 'csi' was included in bootargs in u-boot parameters.

if not , add 'csi' to bootargs.

(2)check BSP and confirm if CSI pins IOMUXING are correct.

(3)check if the path of init.rc is correct.

I remember init.rc is in myandroid/device/fsl/imx/evk_6sl/, and after finding correct init.rc, if "setprop back_camera_name csi" is not ok, you can try to modify it as:

setprop back_camera_name ov5640

(4) analysis for the issue

From your log, It seems that camera HAL didn't find /dev/video0 device, so prompt you can't open camera0 or can't connect camera. After checking above items, if camera can't also normally work, you can trace camera HAL source code: myandroid/hardware/imx/mx6/libcamera2/

Hope above suggestion can help you !

Regards,

weidong

[vinothrajm]

Hi weidong.sun​,

     I confirm you some details about my work.

(1) I included 'csi' to bootargs in u-boot parameters.

(2) I included the correct IOMUXING for CSI pins in BSP.

(3) I edited the correct init.rc file in ../myandroid/device/fsl/evksl/ .

I already mentioned correct init.rc path in my last post.

I also modified the init.rc file separately with below lines:

setprop back_camera_name ov5640

setprop back_camera_name ov5640_camera

But it has no improvement. Same log came.

(4) Yes, camera HAL did not find the /dev/video0 . may I specify the camera path in ../myandroid/device/fsl/evksl/init.rc file ?

(5) And also i traced the Camera HAL source code :

The trace does not go to : myandroid/hardware/imx/mx6/libcamera2/ .

It goes to myandroid/hardware/imx/mx6/libcamera/ .

Is it right or wrong camera HAL source code ?

How can i change the myandroid/hardware/imx/mx6/libcamera/ to myandroid/hardware/imx/mx6/libcamera2/ .

thanks,

vinothraj

[weidong_sun]

OK, vinothraj,

    I wil check source code again, and reply you next week.

Regards,

weidong

[vinothrajm]

Thank weidong.sun​ for your help.

regards,

vinothraj

[weidong_sun]

Hi vinothraj,

     Yes, you are right. I confirmed that i.MX6SL EVK uses libcamera, not libcamera2, so please use:

"setprop back_camera_name csi" in init.rc

then add some LOG information to  trace camera HAL source code, to find the reason why camera HAL didn't find correct path( /dev/video0), I feel if camera HAL can normally open /dev/video0, the issue you met should be solved.

Regards,

Weidong

[vinothrajm]

Hi weidong.sun​,

   yes I also changed the "setprop back_camera_name csi" and "setprop front_camera_name csi" separately in init.rc. But i cannot able to get camera succesfully.

I also add some log information in libcamera. But i get bit confused  to trace the log.

Any other way to check weather the camera is working or not?

Because first i check the camera os ported successfully or not?

I can able to see the i2c address of the camera using i2cdetect command. but i do not know how to check the camera is ported or not?

Kindly give any suggestion.

thanks,

vinothraj

[weidong_sun]

Hi vinothraj,

     In file CameraModule.cpp, there is a line of 'sprintf(dev_node, "/dev/%s", dir_entry->d_name);', you can print the content of "dev_node" to see if it is correct path of the camera device.

Regards,

Weidong

[vinothrajm]

Hi weidong.sun​,

i already added the log in file CameraModule.cpp.

	if (strncmp(dir_entry->d_name, "video", 5))
	continue;
	sprintf(dev_node, "/dev/%s", dir_entry->d_name);

FLOGE(" dev_node :%s",dev_node);

	if ((fd = open(dev_node, O_RDWR, O_NONBLOCK)) < 0)
	continue;
	if (ioctl(fd, VIDIOC_QUERYCAP, &v4l2_cap) < 0) {

FLOGE(" video capability error");

	close(fd);
	fd = 0;
	continue;

in init.rc file

   setprop back_camera_name csi

    setprop back_camera_orient 0

    setprop front_camera_name uvc        

    setprop front_camera_orient 0

and i compiled and booted

root@evk_6sl:/ # logcat | grep cam

W/PackageManager( 2506): Package com.android.camera desires unavailable shared library com.google.android.!

I/ActivityManager( 2506): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] 6

I/ActivityManager( 2506): Start proc com.android.camera for activity com.android.camera/.Camera: pid=3199 }

V/CameraHolder( 3199): open camera 0

I/CameraClient( 2133): Opening camera 0

I/FslCameraHAL( 2133): camera_device open: 0

E/FslCameraHAL( 2133): camera_device open: 0

E/FslCameraHAL( 2133): cameraid : 0

E/FslCameraHAL( 2133): num_cameras: 1

I/FslCameraHAL( 2133): init  device name is csi

ialize name:uvc, path:

I/FslCameioctl_g_ifparm yzw==>Enter ioctl_g_ifparm[drivers/media/video/mxc/capture/ov5640.c]

raHAL( 2133):vin1 sensor vin clock_curr=mclk=24000000

name:uvc

I/FslCameraHAL( 2133): DeviceAdapter: vin1 hehe Create uvc device

E/FslCameraHAL( 2133): info.name: uvc

E/FslCameraHAL( 2133): info.devPath:

E/FslCameraHAL( 2133): sensor name :uvc

Einit yzw==>Enter ioctl_init return 0[drivers/media/video/mxc/capture/ov5640.c]

/FslCameraHAL( 2133): v4l entry

E/FslCameraHAL( 2133): v4l entry

E/FslCameraHAL( 2133): v4l entry

E/FslCameraHAL( 2133): dev_node :/dev/video0

E/FslCameraHAL( 2133): video capability error

E/FslCameraHAL( 2133): v4l entry

E/FslCameraHAL( 2133): dev_node :/dev/video1

E/FslCameraHAL( 2133): video capability error

E/FslCameraHAL( 2133): info.name: uvc

E/FslCameraHAL( 2133): info.devPath:

E/FslCameraHAL( 2133): can not open camera devpath:

E/FslCameraHAL( 2133): CameraHal: vin1 DeviceAdapter initialize failed

E/CameraClient( 2133): Could not open camera 0: -22

I/CameraClient( 2133): Destroying camera 0

W/CameraBase( 3199): An error occurred while connecting to camera: 0

E/CameraHolder( 3199): java.lang.RuntimeException: Fail to connect to camera service

E/CameraHolder( 3199):  at com.android.camera.CameraHolder.open(CameraHolder.java:131)

E/CameraHolder( 3199):  at com.android.camera.Util.openCamera(Util.java:267)

E/CameraHolder( 3199):  at com.android.camera.Camera$4.run(Camera.java:1100)

V/camera  ( 3199): surfaceChanged. w=592. h=444

I/ActivityManager( 2506): Displayed com.android.camera/.Camera: +1s802ms

(1) i added uvc and csi in init.rc file.But in the logcat only shows the uvc. E/FslCameraHAL( 2133): info.name: uvc

(2) i detect /dev/video0. but it goes video capability error log.  what it means?

problem in driver file of OV5640 or any other? because i changed some changes in the ov5640 driver file.

Regards,

vinothraj.

[weidong_sun]

Hi vinothraj,

     Did you see the value of dev_node ?

     I feel you should use "LOGI(" dev_node :%s",dev_node);" to print value of dev_node in android log.

After booting, on command line , run "logcat", atfer displaying is over, starting camera.apk to check the value of dev_node.

could you try it on and tell me the value ?

     I checked your log, I found uvc camera was loaded, it was not correct, it means ov5640.cpp was not loaded, so could you add some information in ov5640.cpp to check if the file was used ?

Regards,

Weidong

[vinothrajm]

Hi weidong.sun​,

i added "ALOGI(" dev_node :%s",dev_node);" in file CameraModule.cpp .

if (ioctl(fd, VIDIOC_QUERYCAP, &v4l2_cap) < 0) {

FLOGE("video capability error");            //this log is printed in logcat so /dev/video have not video capability.so only get device path is failed

                close(fd);

                fd = 0;

                continue;

But same output came when booting,

E/FslCameraHAL( 2133): dev_node :/dev/video0

E/FslCameraHAL( 2133): video capability error

E/FslCameraHAL( 2133): v4l entry

E/FslCameraHAL( 2133): dev_node :/dev/video1

E/FslCameraHAL( 2133): video capability error

And also added the information in ov5640.cpp .

in that logcat it could not reach the information added in the ov5640.cpp .

regards,

vinothraj