Hi,
I encounter failure when I try to use ov5640 camera on imx8mp-evk board and need guide and help.
I confirm ov5640 camera module (bought together with evk board) works on imx8mm-evk board with command: gst-launch-1.0 v4l2src device=/dev/video0 ! autovideosink with image: LF_v5.15.32-2.0.0_images_IMX8MMEVK.zip.
I only have one camera: ov5640 on hand, so I connect the camera to imx8mp-evk board J12 (CSI1 MIPI). imx8mp-evk board is downloaded with image: LF_v5.15.32-2.0.0_images_IMX8MPEVK.zip.
System detected the camera, and v4l2 devices looks ok:
$ v4l2-ctl --list-devices
():
/dev/v4l-subdev0
mxc-isi-cap (platform:32e00000.isi:cap_devic):
/dev/video3
mxc-isi-m2m (platform:32e00000.isi:m2m_devic):
/dev/video2
FSL Capture Media Device (platform:mxc-md):
/dev/media0
vsi_v4l2dec (platform:vsi_v4l2dec):
/dev/video1
vsi_v4l2enc (platform:vsi_v4l2enc):
/dev/video0
we can see the capture device presented is /dev/video3 (ov5640 using ISI, it's correct)
I try to using different tools to use ov5640 camera, looks nothing error but hang here, so I think there is no problem for start_stream IOCTL, but there is no data return to user space, so user space tool waiting there for data.
$ gst-launch-1.0 -e v4l2src device=/dev/video3 ! video/x-raw ! autovideosink
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
[ 1802.093915] bypass csc
[ 1802.096289] input fmt YUV4
[ 1802.099019] output fmt YUYV
$ /unit_tests/V4L2/mx8_v4l2_cap_drm.out -cam 8 -fmt NV12 -ow 1920 -oh 1080 -num 1 -of
init channel[3] save_file_name=3.NV12
init channel[3] v4l2_dev_name=/dev/video3 w/h=(1280,800)
open 3.NV12 success
open /dev/video3 success
planes=2 WxH@fps = 1920x1080@30
bypass csc
input fmt YUV4
output fmt NV12
channel[3] v4l_dev=0x4 start capturing
$ ls -l
-rw-r----- 1 root root 0 Oct 9 20:03 3.NV12
$ v4l2-ctl -d /dev/video3 --set-fmt-video=width=1280,height=720,pixelformat='NV12' --stream-mmap --stream-count=5
[ 981.256852] bypass csc
[ 981.259229] input fmt YUV4
[ 981.261954] output fmt NV12
When preview with gst-launch-1.0, did not see any capturing on HDMI. when save camera data with mx8_v4l2_cap_drm.out, the size of saved file is always 0. when getting camera data with v4l2-ctl, no data presented (if there is data, could see something like <<<<<<<<<<<<<<<<<<<<<<<<<< from console).
I also try to connect the camera to CSI2 and using dtb file: imx8mp-evk-basler-ov5640.dtb. in that case, the ov5640 capturing device is /dev/video2. I also try above three tools and the result is the same.
Could you help to provide the comment why it happen and how I can make ov5640 camera work on imx8mp-evk board?
Thanks.
Johnson
