AM62A7: cannot capture images from a probe csi sensor

By the way, i use the same method to revise max96712.ko and k3-am62a3-sk.dts for the ti-processor-sdk-linux-edgeai-am62axx-evm-09_00_01_03 SDK. it works well.

Here is the modification point of DTS.

...

The question is very similar to 

https://e2echina.ti.com/support/processors/f/processors-forum/759139/sk-tda4vm-v4l2-api-imx219-dqbuf/2774681?tisearch=e2e-sitesearch&keymatch=VIDIOC_REQBUFS#2774681

Hello,

twl tan said:

Here is the modification point of DTS.

Were you trying to share some code? I don't see any.

twl tan said:

It seems that the entire v4l2 link is complete.

Yes, the media pipe looks good. Just in case, can you compare the log of "media-ctl -p" between 9.0 and 9.2 and see if there is any difference?

Regards,

Jianzhong

Hello,

The modification points for k3-am62a7-sk  are as follows:

&main_i2c2 {
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&main_i2c2_pins_default>;
	clock-frequency = <400000>;

	imx96712: camera@6b {
		compatible = "maxim,max96712";
		reg = <0x6b>;
		//enable-gpios = <&pca9654_a 0 GPIO_ACTIVE_HIGH>;

		max96712_ports: ports {
				#address-cells = <1>;
				#size-cells = <0>;

				port@4 {
					reg = <4>;
					max96712_out0: endpoint {
							data-lanes = <1 2 3 4>;
							clock-lanes = <0>;
							bus-type = <4>; /* CSI2 DPHY. */
							link-frequencies = /bits/ 64 <800000000>;
							remote-endpoint = <&csi2rx0_in_sensor>;
					};
				};
		};
	};
};

&cdns_csi2rx0 {
	ports {
		port@0 {
			status = "okay";

			csi2rx0_in_sensor: endpoint {
				remote-endpoint = <&max96712_out0>;
				clock-lanes = <0>;
				data-lanes = <1 2 3 4>;
				link-frequencies = /bits/ 64 <800000000>;
			};
		};
	};	
};

Today,I compare the log of "media-ctl -p" between 9.0 and 9.2 and find that they are consistent.

here is 9.0 log

root@am62axx-evm:/opt/edgeai-gst-apps# media-ctl -p
Media controller API version 6.1.46[   49.399966] max 96712 get format


Media device information
------------------------
driver          j721e-csi2rx
model           TI-CSI2RX
serial          
bus info        platform:30102000.ticsi2rx
hw revision     0x1
driver version  6.1.46

Device topology
- entity 1: 30102000.ticsi2rx (7 pads, 7 links, 1 route)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
        routes:
                0/0 -> 1/0 [ACTIVE]
        pad0: Sink
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                <- "cdns_csi2rx.30101000.csi-bridge":1 [ENABLED,IMMUTABLE]
        pad1: Source
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                -> "30102000.ticsi2rx context 0":0 [ENABLED,IMMUTABLE]
        pad2: Source
                -> "30102000.ticsi2rx context 1":0 [ENABLED,IMMUTABLE]
        pad3: Source
                -> "30102000.ticsi2rx context 2":0 [ENABLED,IMMUTABLE]
        pad4: Source
                -> "30102000.ticsi2rx context 3":0 [ENABLED,IMMUTABLE]
        pad5: Source
                -> "30102000.ticsi2rx context 4":0 [ENABLED,IMMUTABLE]
        pad6: Source
                -> "30102000.ticsi2rx context 5":0 [ENABLED,IMMUTABLE]

- entity 9: cdns_csi2rx.30101000.csi-bridge (5 pads, 2 links, 1 route)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev1
        routes:
                0/0 -> 1/0 [ACTIVE]
        pad0: Sink
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                <- "max96712 2-006b":0 [ENABLED,IMMUTABLE]
        pad1: Source
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                -> "30102000.ticsi2rx":0 [ENABLED,IMMUTABLE]
        pad2: Source
        pad3: Source
        pad4: Source

- entity 15: max96712 2-006b (1 pad, 1 link, 0 route)
             type V4L2 subdev subtype Unknown flags 0
             device node name /dev/v4l-subdev2
        pad0: Source
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                -> "cdns_csi2rx.30101000.csi-bridge":0 [ENABLED,IMMUTABLE]

- entity 21: 30102000.ticsi2rx context 0 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video3
        pad0: Sink
                <- "30102000.ticsi2rx":1 [ENABLED,IMMUTABLE]

- entity 27: 30102000.ticsi2rx context 1 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video4
        pad0: Sink
                <- "30102000.ticsi2rx":2 [ENABLED,IMMUTABLE]

- entity 33: 30102000.ticsi2rx context 2 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video5
        pad0: Sink
                <- "30102000.ticsi2rx":3 [ENABLED,IMMUTABLE]

- entity 39: 30102000.ticsi2rx context 3 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video6
        pad0: Sink
                <- "30102000.ticsi2rx":4 [ENABLED,IMMUTABLE]

- entity 45: 30102000.ticsi2rx context 4 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video7
        pad0: Sink
                <- "30102000.ticsi2rx":5 [ENABLED,IMMUTABLE]

- entity 51: 30102000.ticsi2rx context 5 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video8
        pad0: Sink
                <- "30102000.ticsi2rx":6 [ENABLED,IMMUTABLE]				

here is 9.2 log

Media controller API version 6.1.80

[   95.267614] max 96712 get format
Media device information
------------------------
driver          j721e-csi2rx
model           TI-CSI2RX
serial          
bus info        platform:30102000.ticsi2rx
hw revision     0x1
driver version  6.1.80

Device topology
- entity 1: 30102000.ticsi2rx (7 pads, 7 links, 1 route)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
        routes:
                0/0 -> 1/0 [ACTIVE]
        pad0: Sink
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                <- "cdns_csi2rx.30101000.csi-bridge":1 [ENABLED,IMMUTABLE]
        pad1: Source
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                -> "30102000.ticsi2rx context 0":0 [ENABLED,IMMUTABLE]
        pad2: Source
                -> "30102000.ticsi2rx context 1":0 [ENABLED,IMMUTABLE]
        pad3: Source
                -> "30102000.ticsi2rx context 2":0 [ENABLED,IMMUTABLE]
        pad4: Source
                -> "30102000.ticsi2rx context 3":0 [ENABLED,IMMUTABLE]
        pad5: Source
                -> "30102000.ticsi2rx context 4":0 [ENABLED,IMMUTABLE]
        pad6: Source
                -> "30102000.ticsi2rx context 5":0 [ENABLED,IMMUTABLE]

- entity 9: cdns_csi2rx.30101000.csi-bridge (5 pads, 2 links, 1 route)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev1
        routes:
                0/0 -> 1/0 [ACTIVE]
        pad0: Sink
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                <- "max96712 2-006b":0 [ENABLED,IMMUTABLE]
        pad1: Source
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                -> "30102000.ticsi2rx":0 [ENABLED,IMMUTABLE]
        pad2: Source
        pad3: Source
        pad4: Source

- entity 15: max96712 2-006b (1 pad, 1 link, 0 route)
             type V4L2 subdev subtype Unknown flags 0
             device node name /dev/v4l-subdev2
        pad0: Source
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none]
                -> "cdns_csi2rx.30101000.csi-bridge":0 [ENABLED,IMMUTABLE]

- entity 21: 30102000.ticsi2rx context 0 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video3
        pad0: Sink
                <- "30102000.ticsi2rx":1 [ENABLED,IMMUTABLE]

- entity 27: 30102000.ticsi2rx context 1 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video4
        pad0: Sink
                <- "30102000.ticsi2rx":2 [ENABLED,IMMUTABLE]

- entity 33: 30102000.ticsi2rx context 2 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video5
        pad0: Sink
                <- "30102000.ticsi2rx":3 [ENABLED,IMMUTABLE]

- entity 39: 30102000.ticsi2rx context 3 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video6
        pad0: Sink
                <- "30102000.ticsi2rx":4 [ENABLED,IMMUTABLE]

- entity 45: 30102000.ticsi2rx context 4 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video7
        pad0: Sink
                <- "30102000.ticsi2rx":5 [ENABLED,IMMUTABLE]

- entity 51: 30102000.ticsi2rx context 5 (1 pad, 1 link, 0 route)
             type Node subtype V4L flags 0
             device node name /dev/video8
        pad0: Sink
                <- "30102000.ticsi2rx":6 [ENABLED,IMMUTABLE]

actually, i write a demo based v4l2 framework to capture images, the program is blocked at xioctl(fd, VIDIOC_DQBUF, &buf);

it means there are no valid video stream data arriving to /dev/video3?

Here is demo:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/videodev2.h>
#include <errno.h>
#include <linux/v4l2-subdev.h>

#define VIDEO_DEVICE "/dev/video3"
#define VIDEO_WIDTH 1920
#define VIDEO_HEIGHT 1080
#define BUFFER_COUNT 4

#define SUBDEV_J271			"/dev/v4l-subdev0"
#define SUBDEV_BRIDGE		"/dev/v4l-subdev1"
#define SUBDEV_max96712		"/dev/v4l-subdev2"

struct buffer {
    void *start;
    size_t length;
};

static void errno_exit(const char *s) {
    fprintf(stderr, "%s error %d, %s\n", s, errno, strerror(errno));
    exit(EXIT_FAILURE);
}

static int xioctl(int fd, int request, void *arg) {
    int r = -10;
    do {
        r = ioctl(fd, request, arg);
    } while (r == -1 && errno == EINTR);
	printf("r: %d, errno: %d \n", r, errno);
    return r;
}

int get_subdev_fmt(const char* name)
{
	int fd = open(name, O_RDWR | O_NONBLOCK);
	if(fd < 0)
	{
		printf("open[%s] errno[%d]\n", name, errno);
		return -1;
	}
	printf("fd[%d]\n", fd);

	struct v4l2_subdev_format format;
	memset(&format, 0, sizeof(format));
	format.pad = 0;
	format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
	if (xioctl(fd, VIDIOC_SUBDEV_G_FMT, &format) == -1) {
        perror("Failed to get_subdev_fmt");
		close(fd);
        return EXIT_FAILURE;
    }

	printf("name[%s] code[%d] width[%d] height[%d]\n", name, format.format.code, format.format.width, format.format.height);
	close(fd);
	return 0;
}

int set_subdev_fmt(const char* name, struct v4l2_subdev_format* format)
{
	int fd = open(name, O_RDWR | O_NONBLOCK);
	if(fd < 0)
	{
		printf("open[%s] errno[%d]\n", name, errno);
		return -1;
	}
	printf("fd[%d]\n", fd);

	if (xioctl(fd, VIDIOC_SUBDEV_S_FMT, format) == -1) {
        perror("Failed to set_subdev_fmt");
		close(fd);
        return EXIT_FAILURE;
    }
	
	close(fd);
	return 0;
}

//#define FMT	MEDIA_BUS_FMT_RGB888_1X24
#define FMT	MEDIA_BUS_FMT_UYVY8_1X16

int main() {
    struct v4l2_capability cap;
    struct v4l2_format fmt;
    struct v4l2_requestbuffers req;
    struct v4l2_buffer buf;
    struct buffer *buffers;
    unsigned int i;
    int fd;
	int ret;

    fd = open(VIDEO_DEVICE, O_RDWR | O_NONBLOCK, 0);
    if (fd == -1) {
        perror("Failed to open video device");
        return EXIT_FAILURE;
    }
	printf("twl %s fd[%d ] \n", VIDEO_DEVICE, fd);

    if (xioctl(fd, VIDIOC_QUERYCAP, &cap) == -1) {
        perror("Failed to query device capabilities");
        return EXIT_FAILURE;
    }
	printf("twl driver_name[%s ] \n", cap.driver);


    if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
        fprintf(stderr, "Device does not support video capture\n");
        return EXIT_FAILURE;
    }
	
	struct v4l2_subdev_format format;

	//cdns_csi2rx
	memset(&format, 0, sizeof(format));
	format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
	format.format.code = FMT;
	format.format.field  = V4L2_FIELD_NONE;
	format.format.width = 1920;
	format.format.height = 1080;
	format.pad = 0;
	set_subdev_fmt(SUBDEV_BRIDGE, &format);
	printf("set cdns fmt end\n");



	//ticsi2rx
	memset(&format, 0, sizeof(format));
	format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
	format.format.code = FMT;
	format.format.field  = V4L2_FIELD_NONE;
	format.format.width = 1920;
	format.format.height = 1080;
	format.pad = 0;
	set_subdev_fmt(SUBDEV_J271, &format);
	printf("J271 end\n");



	//video set format
    memset(&fmt, 0, sizeof(fmt));
    fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
    fmt.fmt.pix.width = VIDEO_WIDTH;
    fmt.fmt.pix.height = VIDEO_HEIGHT;
    fmt.fmt.pix.pixelformat = FMT;
    fmt.fmt.pix.field = V4L2_FIELD_NONE;
    if (xioctl(fd, VIDIOC_S_FMT, &fmt) == -1) {
        perror("Failed to set pixel format");
        return EXIT_FAILURE;
    }

	//buf
    memset(&req, 0, sizeof(req));
    req.count = BUFFER_COUNT;
    req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
    req.memory = V4L2_MEMORY_MMAP;
    if (xioctl(fd, VIDIOC_REQBUFS, &req) == -1) {
        perror("Failed to request buffers");
        return EXIT_FAILURE;
    }

    buffers = (struct buffer *)calloc(req.count, sizeof(*buffers));
    if (!buffers) {
        fprintf(stderr, "Out of memory\n");
        return EXIT_FAILURE;
    }

    for (i = 0; i < req.count; i++) {
        memset(&buf, 0, sizeof(buf));
        buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        buf.memory = V4L2_MEMORY_MMAP;
        buf.index = i;
        if (xioctl(fd, VIDIOC_QUERYBUF, &buf) == -1) {
            perror("Failed to query buffer");
            return EXIT_FAILURE;
        }

        buffers[i].length = buf.length;
        buffers[i].start = mmap(NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, buf.m.offset);
        if (buffers[i].start == MAP_FAILED) {
            perror("Failed to mmap buffer");
            return EXIT_FAILURE;
        }
    }

    for (i = 0; i < req.count; i++) {
        memset(&buf, 0, sizeof(buf));
        buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        buf.memory = V4L2_MEMORY_MMAP;
        buf.index = i;
        if (xioctl(fd, VIDIOC_QBUF, &buf) == -1) {
            perror("Failed to queue buffer");
            return EXIT_FAILURE;
        }
    }

	sleep(1);
    enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

    if (xioctl(fd, VIDIOC_STREAMON, &type) == -1) {
        perror("Failed to start streaming");
        return EXIT_FAILURE;
    }
	//printf("start tick[%d]\n", );

	while(1)
	{
	    if (xioctl(fd, VIDIOC_DQBUF, &buf) == -1) {
	        printf("Failed to dequeue buffer\n");
			usleep(50*1000);
	        continue;
	    }
		break;
	}

	FILE *fp = fopen("/tmp/frame.raw", "wb");
    if (!fp) {
        perror("Failed to open output file");
        return EXIT_FAILURE;
    }
    fwrite(buffers[buf.index].start, buf.bytesused, 1, fp);
    fclose(fp);

    if (xioctl(fd, VIDIOC_STREAMOFF, &type) == -1) {
        perror("Failed to stop streaming");
        return EXIT_FAILURE;
    }

    for (i = 0; i < req.count; i++) {
        if (munmap(buffers[i].start, buffers[i].length) == -1) {
            perror("Failed to munmap buffer");
            return EXIT_FAILURE;
        }
    }
	
    free(buffers);
    close(fd);
    return EXIT_SUCCESS;
}

Can you provide some ideas to trace the video stream?I want to  know the reason why it block at VIDIOC_DQBUF.

Regards,

twl

Hi twl,

Thanks for the detailed information. Please give me a few days to look into this issue.

Regards,

Jianzhong

Hi twl,

I noticed that you set the link frequency to 800MHz:

link-frequencies = /bits/ 64 <800000000>;

According to MIPI D-PHY specs, skew calibration is needed for speeds greater than 1.5Gbps (750MHz).

Can you try a lower link frequency?

twl tan said:

Can you provide some ideas to trace the video stream?I want to  know the reason why it block at VIDIOC_DQBUF.

Can you try your demo code with a sensor that is supported by the SDK (e.g. IMX219) and debug your code?

Regards,

Jianzhong

,Hi，

i reduce the frequency to 750M Hz, or even 500MHz, it still cannot work.

Firstly, the driver for max96712 will be automatically loaded when the development board starts, , but since max96712 does not to be connected yet, I need to restart the module through i2cset. When the module starts working, I uninstall the driver(max96712.so) first and then load it back. Will this method of operation have an impact?

twl tan said:

Will this method of operation have an impact?

Can you try to uninstall and reinstall max96712 as well as j721e_csi2rx, cdns_csi2rx?

modprobe -r  j721e_csi2rx, cdns_csi2rx max96712 

modprobe -a  j721e_csi2rx, cdns_csi2rx max96712 

Hi，

I uninstalled the drivers in the following order：

rmmod max96712
rmmod cdns_dphy_rx
rmmod cdns_csi2rx

and then i  reinstalled the drivers in the following order：

insmod /lib/modules/6.1.80-dirty/kernel/drivers/media/platform/cadence/cdns-csi2rx.ko
insmod /lib/modules/6.1.80-dirty/kernel/drivers/phy/cadence/cdns-dphy-rx.ko
insmod /lib/modules/6.1.80-dirty/kernel/drivers/staging/media/max96712/max96712.ko

However, it still cannot work.

The log:

root@am62axx-evm:/opt/edgeai-gst-apps# rmmod max96712
root@am62axx-evm:/opt/edgeai-gst-apps# rmmod cdns_dphy_rx
root@am62axx-evm:/opt/edgeai-gst-apps# rmmod cdns_csi2rx
root@am62axx-evm:/opt/edgeai-gst-apps# insmod /lib/modules/6.1.80-dirty/kernel/drivers/media/platform/cadence/cdns-csi2rx.ko
root@am62axx-evm:/opt/edgeai-gst-apps# insmod /lib/modules/6.1.80-dirty/kernel/drivers/phy/cadence/cdns-dphy-rx.ko
root@am62axx-evm:/opt/edgeai-gst-apps# [   71.999074] ------------[ cut here ]------------
[   72.003702] WARNING: CPU: 2 PID: 65 at drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c:524 csi_async_notifier_bound+0x28/0x40 [j721e_csi2rx]
[   72.016840] Modules linked in: cdns_dphy_rx cdns_csi2rx overlay rpmsg_ctrl xhci_plat_hcd rpmsg_char snd_soc_hdmi_codec dwc3 cfg80211 bluetooth ecdh_generic ecc rfkill snd_soc_simple_card snd_soc_simple_card_utils crct10dif_ce display_connector k3_j72xx_bandgap e5010_jpeg_enc dwc3_am62 rtc_ti_k3 wave5 j721e_csi2rx ti_k3_r5_remoteproc tidss videobuf2_dma_contig v4l2_mem2mem videobuf2_memops drm_dma_helper videobuf2_v4l2 snd_soc_davinci_mcasp ti_k3_dsp_remoteproc v4l2_fwnode virtio_rpmsg_bus videobuf2_common rpmsg_ns snd_soc_ti_udma ti_k3_common v4l2_async sa2ul sii902x videodev snd_soc_ti_edma snd_soc_ti_sdma drm_kms_helper tps6598x syscopyarea typec mc snd_soc_tlv320aic3x_i2c snd_soc_tlv320aic3x optee_rng sysfillrect sysimgblt fb_sys_fops rng_core fuse drm drm_panel_orientation_quirks ipv6 [last unloaded: cdns_csi2rx]
[   72.089227] CPU: 2 PID: 65 Comm: kworker/u8:2 Tainted: G         C         6.1.80-dirty #2
[   72.097481] Hardware name: Texas Instruments AM62A7 SK (DT)
[   72.103043] Workqueue: events_unbound deferred_probe_work_func
[   72.108884] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   72.115836] pc : csi_async_notifier_bound+0x28/0x40 [j721e_csi2rx]
[   72.122021] lr : v4l2_async_match_notify+0x54/0x1a4 [v4l2_async]
[   72.128034] sp : ffff80000981ba80
[   72.131339] x29: ffff80000981ba80 x28: 0000000000000000 x27: 0000000000000000
[   72.138472] x26: ffff000802144078 x25: ffff0008021441c8 x24: ffff800000dd9000
[   72.145604] x23: ffff000802144180 x22: ffff000807fc6000 x21: ffff0008081800b8
[   72.152735] x20: 0000000000000000 x19: ffff000802144078 x18: ffffffffffffffff
[   72.159867] x17: 7968702e30303030 x16: 313130332d796870 x15: 0000000000000000
[   72.166998] x14: 0000000000000001 x13: 0000000000000000 x12: 0000000000000000
[   72.174129] x11: 0000000000000001 x10: 0000000000000001 x9 : 0000000000000000
[   72.181259] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000001
[   72.188389] x5 : 0000000008000005 x4 : 0000000000000000 x3 : ffff800000ddd400
[   72.195520] x2 : ffff000808180080 x1 : ffff000802144078 x0 : ffff000800d06c78
[   72.202652] Call trace:
[   72.205092]  csi_async_notifier_bound+0x28/0x40 [j721e_csi2rx]
[   72.210931]  v4l2_async_register_subdev+0x8c/0x1bc [v4l2_async]
[   72.216855]  csi2rx_probe+0x3b8/0x590 [cdns_csi2rx]
[   72.221737]  platform_probe+0x68/0xe0
[   72.225400]  really_probe+0xbc/0x2dc
[   72.228973]  __driver_probe_device+0x78/0x114
[   72.233327]  driver_probe_device+0xd8/0x15c
[   72.237506]  __device_attach_driver+0xb8/0x134
[   72.241945]  bus_for_each_drv+0x7c/0xdc
[   72.245777]  __device_attach+0xac/0x1d0
[   72.249609]  device_initial_probe+0x14/0x20
[   72.253789]  bus_probe_device+0x9c/0xa4
[   72.257622]  deferred_probe_work_func+0x88/0xc0
[   72.262147]  process_one_work+0x1d0/0x320
[   72.266158]  worker_thread+0x14c/0x444
[   72.269904]  kthread+0x10c/0x110
[   72.273130]  ret_from_fork+0x10/0x20
[   72.276703] ---[ end trace 0000000000000000 ]---
[   72.281435] cdns-csi2rx 30101000.csi-bridge: Probed CSI2RX with 4/4 lanes, 4 streams, external D-PHY

root@am62axx-evm:/opt/edgeai-gst-apps# insmod /lib/modules/6.1.80-dirty/kernel/drivers/staging/media/max96712/max96712.ko
[   78.026642] max96712: module is from the staging directory, the quality is unknown, you have been warned.
[   78.037419] twl aaa probe
[   78.040100] start probe
[   78.042643] check id
[   78.045309] id success
[   78.207924] max96712 2-006b: Consider updating driver max96712 to match on endpoints
root@am62axx-evm:/opt/edgeai-gst-apps# 

When I execute the command:

modprobe -r  j721e_csi2rx, cdns_csi2rx max96712 

It says:

root@am62axx-evm:/opt/edgeai-gst-apps# modprobe -r  j721e_csi2rx, cdns_csi2rx max96712 
modprobe: FATAL: Module j721e_csi2rx, not found.

It seems that I don't have this driver j721e_csi2rx.

But why i can see j721e_csi2rx through “media-ctl -p” As mentioned above？

Regards,

twl

twl tan said:

But why i can see j721e_csi2rx through “media-ctl -p” As mentioned above？

I'm not sure. What does "lsmod | grep j721e_csi2rx" show right after boot?

After boot, j721e_csi2rx driver will be automatically loaded.But When i want to remove this driver.It says:"modprobe: FATAL: Module j721e_csi2rx, not found."

root@am62axx-evm:/opt/edgeai-gst-apps# modprobe -r  j721e_csi2rx, cdns_csi2rx
modprobe: FATAL: Module j721e_csi2rx, not found.
root@am62axx-evm:/opt/edgeai-gst-apps# 
root@am62axx-evm:/opt/edgeai-gst-apps# lsmod | grep j721e_csi2rx
j721e_csi2rx           24576  0
videobuf2_dma_contig    20480  3 j721e_csi2rx,e5010_jpeg_enc,wave5
videobuf2_v4l2         32768  4 j721e_csi2rx,v4l2_mem2mem,e5010_jpeg_enc,wave5
videobuf2_common       57344  7 j721e_csi2rx,videobuf2_dma_contig,videobuf2_v4l2,v4l2_mem2mem,e5010_jpeg_enc,wave5,videobuf2_memops
v4l2_async             24576  3 v4l2_fwnode,j721e_csi2rx,cdns_csi2rx
videodev              245760  8 v4l2_async,j721e_csi2rx,videobuf2_v4l2,cdns_csi2rx,videobuf2_common,v4l2_mem2mem,e5010_jpeg_enc,wave5
mc                     57344  7 v4l2_async,videodev,j721e_csi2rx,videobuf2_v4l2,cdns_csi2rx,videobuf2_common,v4l2_mem2mem

I'm not sure why it failed to remove j721e_csi2rx. Did you make any changes to the SDK?

twl tan said:

Firstly, the driver for max96712 will be automatically loaded when the development board starts, , but since max96712 does not to be connected yet, I need to restart the module through i2cset. When the module starts working, I uninstall the driver(max96712.so) first and then load it back. Will this method of operation have an impact?

The max96712 is a deserializer, right? Do you have cameras connected to it? I guess you can not connect max96712 before booting the AM62A board. Is that right? I have tried similar operation before, and it worked fine.

I can remove j721e_csi2rx by "rmmod j721e_csi2rx".

Can you elaborate on the sequence of operations?

I used DS90UB960 deserializer in my case. The following works fine for me:

1. power up the AM62A board and boot to Linux

2. power up the deserializer board

3. remove and reload modules:

modprobe -r j721e_csi2rx ds90ub960 cdns_csi2rx

modprobe -a j721e_csi2rx ds90ub960 cdns_csi2rx

On the other hand, if the deserializer board is powered up before AM62A, then #3 above is not needed.