imx8 ISI camera video

[songhongliang]

HI，

CONFIG_IMX8_MEDIA_DEVICE=m
CONFIG_IMX8_ISI_HW=y
CONFIG_IMX8_ISI_CORE=y
CONFIG_IMX8_ISI_CAPTURE=y
CONFIG_IMX8_ISI_M2M=y
CONFIG_IMX8_MIPI_CSI2=y
CONFIG_IMX8_MIPI_CSI2_SAM=y
CONFIG_IMX8_PARALLEL_CSI=y

I used the virtual channel of imx8,but the registered video device does not have the capture function。

example：

struct v4l2_capability cap;
ioctl(fd,VIDIOC_QUERYCAP,&cap);
if(!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE))
{
printf("[%s:%d]TK---------->>>>>%s is no video capture device\n",__func__,__LINE__,dev);
}
else
{
printf("[%s:%d]TK---------->>>>>Device %s: supports capture.\n",__func__,__LINE__,dev);
}

the ISI  video such as /dev/video8 is is no video capture device，but use the uvcvideo is ok.

the kernle log is:

[ 7.290430] mx8-img-md: created link [nvp6324_mipi 6-0030] => [mxc-mipi-csi2.1]
[ 7.302302] mxc-md bus@58000000:camera: mxc_md_create_links

I use the AHD to mipi chip nvp6324，So how should I handle ISI device registration

thanks;

[igorpadykov]

Hi songhongliang

for virtual channels one can look at MX8XMIPI4CAM2 configuration:

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8qm-mek.d...

https://www.nxp.com/part/MX8XMIPI4CAM2#/

simple unit test:

https://source.codeaurora.org/external/imx/imx-test/tree/test/mxc_v4l2_test/mx8_v4l2_cap_drm.c?h=imx...

Best regards
igor

[songhongliang]

HI,

I am use the usb camera is ok, in QT QCamera or QML。

So,I expect the ISI camera can also be very convenient to use。in QCamera or QML。

I am not sure if there is something wrong with the driver of the virtual channel（IMX8 Image Sensor Interface Capture Device Driver ）。Please help to confirm

thanks!

thanks

[igorpadykov]

one can try to build QT image using  Table 1. i.MX Yocto project images

i.MX Yocto Project User’s Guide​

https://developer.ridgerun.com/wiki/index.php?title=Gstreamer_QT_Overlay

Best regards
igor

[songhongliang]

HI,

You can see the screen when you use the mx8_v4l2_cap_drm.c 

example：

/unit_tests/V4L2/mx8_v4l2_cap_drm.out -cam 0x100 -ow 1280 -oh 720 -num 200 

the cmd is ok,

but, I want use camera in QT, use Qcamera or QML to Get video

thanks!