v4l2_int_device entry is not there when issuing lsmod command (mipi csi2)

srinivasaporam — Wed, 13 Jan 2016 12:18:59 GMT

Hi,

We have got IMX6D custom designed board designed based on imx6Q reference board (Wandboard). in custom board we have 512 MB LPDDR2 where as reference board has 1GB/2GB DDR3 RAM.

Now we have connected mipi csi2 camera (Raspi camera (connector is also customized with 15 pin connector)).

When I am running the command for capturing image or video using avconv or gst-launch-1.0 then, image is not being captured.

When iam running the command as :

$ sudo avconv -f video4linux2 -r 30 -s 640x480 -i /dev/video0 out.avi (or)

$ sudo avconv -f video4linux2 -s 640x480 -i /dev/video0 -ss 0:0:2 -frames 1 test.jpg

then it is giving error as ioctl VIDIOC_REQBUFs

and "/dev/video0: No buffer space available"

When we are running this command, we are getting CSI_D0M,CSI_D0P, CSI_D1M, CSI_D1P correctly and laos getting 25 MHz clock from the crystal.

But we are not observing CSI_CLK0M (CN), CSI_CLK0P (CP) are not coming???? what could be the reason.

$gst-launch-1.0 v4l2src device="/dev/video0" num-buffers=1 ! video/x-bayer,width=640,height=480,framerate=1/1 ! bayer2rgb ! videoconvert ! jpegenc ! filesink location=sample_640_480.jpeg

then it is forming sample_640_480.jpeg file but it is not opening.

in all the above commands, when we are entering/running then led on the camera board is glowing and not when terminating the command, then led is going off.

Following are the findings:

1. camera sensor is being detecting in i2c by using i2c-tools (i2cdetect)

root@ubuntu:~# i2cdetect -y 2

0 1 2 3 4 5 6 7 8 9 a b c d e f

00: -- -- -- -- -- -- -- -- -- -- -- -- --

10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

30: -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- --

40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

70: -- -- -- -- -- -- -- --

root@ubuntu:~# lsmod

Module Size Used by

mxc_v4l2_capture 28532 1

ipu_bg_overlay_sdc 5401 1 mxc_v4l2_capture

ipu_still 2528 1 mxc_v4l2_capture

ipu_prp_enc 5943 1 mxc_v4l2_capture

ipu_csi_enc 3863 1 mxc_v4l2_capture

ipu_fg_overlay_sdc 6217 1 mxc_v4l2_capture

ov5647_camera_mipi 30906 0

Here v4l2_int_device entry is not there.... why v4l2_int_device entry is not there. what could be the problem?????? i have v4l2_int_device.c file and v4l2_int_device.h files. What could be possible error

when iam dumping mipi csi2 regs by using devmem2 tool

[root@erez]# devmem 0x21dc000

0x3130302A

[root@erez]# devmem 0x21dc004

0x1

[root@erez]# devmem 0x21dc008

0x1

[root@erez]# devmem 0x21dc00c

0x1

[root@erez]# devmem 0x21dc010

0x1

[root@erez]# devmem 0x21dc014

0x200

[root@erez]# devmem 0x21dc018

0x0

[root@erez]# devmem 0x21dc020

0x00000000

[root@erez]# devmem 0x21dc024

0x0

[root@erez]# devmem 0x21dc02c

0x00000000

[root@erez]# devmem 0x21dc030

0x0

[root@erez]# devmem 0x21dc034

0x0

These are dts file entries for reference (wrt mipi csi2)

v4l2_cap_0 {

compatible = "fsl,imx6q-v4l2-capture";

ipu_id = <0>;

csi_id = <1>;

//csi_id = <0>;

mclk_source = <0>;

mipi_camera = <1>;

default_input = <1>;

status = "okay";

};

v4l2_out {

compatible = "fsl,mxc_v4l2_output";

status = "okay";

};

&i2c3 {

clock-frequency = <100000>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_i2c3_3>;

status = "okay";

ov5647_mipi@36 {

compatible = "ovti,ov5647_mipi";

reg = <0x36>;

// Pi camera has its own 25MHz clock.

clocks = <&clks 0>;

clock-names = "csi_mclk";

DOVDD-supply = <&reg_3p3v>;

AVDD-supply = <&reg_3p3v>;

DVDD-supply = <&reg_3p3v>;

pwn-gpios = <&gpio5 31 GPIO_ACTIVE_HIGH>;

led-gpios = <&gpio5 19 GPIO_ACTIVE_HIGH>;

ipu_id = <0>;

csi_id = <1>;

//csi_id = <0>;

mclk = <25000000>;

mclk_source = <0>;

//pinctrl-names = "default";

//pinctrl-0 = <&pinctrl_mipi_csi_1>;

extended-buffer;

};

&iomuxc {

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_hog_1>;

imx6qdl-wandboard {

pinctrl_hog_1: hoggrp-1 {

fsl,pins = <

MX6QDL_PAD_CSI0_DAT12__GPIO5_IO30 0x80000000

MX6QDL_PAD_CSI0_DAT13__GPIO5_IO31 0x0f0b0

MX6QDL_PAD_CSI0_MCLK__GPIO5_IO19 0x80000000

};

&mipi_csi {

ipu_id = <0>;

csi_id = <1>;

//csi_id = <0>;

v_channel = <0>;

lanes = <2>;

mipi_dphy_clk = <0x28>;

status = "okay";

};

How resolve the issues????

Re: v4l2_int_device entry is not there when issuing lsmod command (mipi csi2)

igorpadykov — Thu, 14 Jan 2016 00:44:01 GMT

Hi Srinivasa

seems v4l2_int_device is loaded at run time, so if some errors

happen it will not load. You can add debug printfs to trace where

problem occurs.

Best regards

igor

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v4l2_int_device entry is not there when issuing lsmod command (mipi csi2)

Re: v4l2_int_device entry is not there when issuing lsmod command (mipi csi2)