UVCIOC_CTRL_MAP not work

UVCIOC_CTRL_MAP not work

[hardycheng(鄭易昕)]

[-- Attachment #1: Type: text/plain, Size: 1829 bytes --]

Hi,

# Environment:

OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic)
Program Language = C Language

# Overview:

We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP` function on PC to create the v4l2 control mapping, but we got error `UVCIOC_CTRL_MAP: Inappropriate ioctl for device`
Development with `C language` in `Ubuntu 22.04 LTS` 

# Description:

We have a custom UVC camera and we can modify the extension unit(XU) by ourself. (USB descriptions reference attachments `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)

We make sure that UVCIOC_CTRL_QUERY is work to control our XU item (demo code in attachment `uvc_xu_ioctl_demo.c`)

but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` (demo code in attachment `uvc_xu_v4l_mapping_demo.c`)

# Problems:

1.	Is UVCIOC_CTRL_MAP function using in the PC host?
2.	Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
3.	Is there any sample code about struct `uvc_xu_control_mapping` using?

Looking forward to your reply,
Best Regards,
Hardy#2374

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[-- Attachment #2: uvc_xu_ioctl_demo.c --]
[-- Type: text/plain, Size: 2464 bytes --]

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/usb/video.h>
#include <linux/uvcvideo.h>
#include <linux/videodev2.h>

#define XU_QUERY_SIZE 0x3C

char originStr[XU_QUERY_SIZE];
char modifyStr[XU_QUERY_SIZE] = "Test123";

bool getUVC_XU_DemoString(char* buf, int size);
bool setUVC_XU_DemoString(char* buf, int size);

int main(int argc, char **argv)
{
    if(getUVC_XU_DemoString(originStr, XU_QUERY_SIZE)){
        printf("XU GET: %s\n", originStr);
    }
    if(setUVC_XU_DemoString(modifyStr, XU_QUERY_SIZE)){
        printf("XU SET: %s\n", modifyStr);
    }
    if(getUVC_XU_DemoString(modifyStr, XU_QUERY_SIZE)){
        printf("XU GET: %s\n", modifyStr);
    }
    if(setUVC_XU_DemoString(originStr, XU_QUERY_SIZE)){
        printf("XU SET: %s\n", originStr);
    }
    return 0;
}

bool getUVC_XU_DemoString(char* buf, int size){
    int fd = open("/dev/video0", O_RDWR);
    bool result = true;
    if(fd < 0) {
        perror("File Open Fail");
        result = false;
        goto ret;
    }
    if(size < XU_QUERY_SIZE){
        perror("Invalid buffer size");
        result = false;
        goto ret;
    }
    struct uvc_xu_control_query query = {
        .query = UVC_GET_CUR,
        .unit = 0x4,
        .selector = 0x01,
        .size = XU_QUERY_SIZE,
        .data = (unsigned char*)malloc(XU_QUERY_SIZE),
    };
    if (ioctl(fd, UVCIOC_CTRL_QUERY, &query) < 0) {
        perror("UVCIOC_CTRL_QUERY");
        result = false;
        goto ret;
    }
    memcpy(buf, query.data, query.size);
    free(query.data);
    ret:
    close(fd);
    return result;
}

bool setUVC_XU_DemoString(char* buf, int size){
int fd = open("/dev/video0", O_RDWR);
    bool result = true;
    if(fd < 0) {
        perror("File Open Fail");
        result = false;
        goto ret;
    }
    if(size > XU_QUERY_SIZE){
        perror("Invalid buffer size");
        result = false;
        goto ret;
    }
    struct uvc_xu_control_query query = {
        .query = UVC_SET_CUR,
        .unit = 0x4,
        .selector = 0x01,
        .size = XU_QUERY_SIZE,
        .data = (unsigned char*)malloc(XU_QUERY_SIZE),
    };
    memcpy(query.data, buf, size);
    if (ioctl(fd, UVCIOC_CTRL_QUERY, &query) < 0) {
        perror("UVCIOC_CTRL_QUERY");
        result = false;
        goto ret;
    }
    free(query.data);
    ret:
    close(fd);
    return result;
}

[-- Attachment #3: uvc_xu_v4l_mapping_demo.c --]
[-- Type: text/plain, Size: 1051 bytes --]

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/usb/video.h>
#include <linux/uvcvideo.h>
#include <linux/videodev2.h>

int main(){
    int result;
    int fd = open("/dev/video0", O_RDWR);
    if(fd < 0) {
        perror("File Open Fail");
        goto close;
    }

    struct uvc_xu_control_mapping mapping = {
        .id = 0x01,
        .name = "My Extension Unit",
        .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
        .selector = 0x01,
        .size = 0x3C,
        .offset = 0x00,
        .v4l2_type = V4L2_CTRL_TYPE_STRING,
        .data_type = UVC_CTRL_DATA_TYPE_RAW,
        .menu_info = NULL,
        .menu_count = 0,
        .reserved = {0},
    };

    result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping), &mapping);
    if (result != 0) {
        perror("UVCIOC_CTRL_MAP");
        goto close;
    }

    close:
    close(fd);
    return 0;
}

[-- Attachment #4: usb_decriptions.txt --]
[-- Type: text/plain, Size: 26131 bytes --]

Bus 001 Device 002: ID 2245:1230 Aspeed Technology, Inc. Cupola360 Camera

Device Descriptor:

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  idVendor           0x2245 Aspeed Technology, Inc.

  idProduct          0x1230 

  bcdDevice            1.00

  iManufacturer           1 ASPEED Technology Inc.

  iProduct                2 Cupola360 Camera

  iSerial                 3 123456

  bNumConfigurations      1

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    wTotalLength       0x02b8

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        wTerminalType      0x0101 USB Streaming

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      bInterfaceClass        14 Video

      bInterfaceSubClass      2 Video Streaming

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          Fields per frame: 1 fields

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      VideoStreaming Interface Descriptor:

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        dwMaxVideoFrameBufferSize     2073600

        dwDefaultFrameInterval         333333

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          Still image unsupported

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      VideoStreaming Interface Descriptor:

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        bDescriptorSubtype                  7 (FRAME_MJPEG)

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        bmCapabilities                   0x00

          Still image unsupported

        wWidth                           3840

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        dwMaxVideoFrameBufferSize     6574080

        dwDefaultFrameInterval         333333

        bFrameIntervalType                  2

        dwFrameInterval( 0)            333333

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      VideoStreaming Interface Descriptor:

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        bDescriptorType                    36

        bDescriptorSubtype                  7 (FRAME_MJPEG)

        bFrameIndex                         4

        bmCapabilities                   0x00

          Still image unsupported

        wWidth                           2560

        wHeight                          1136

        dwMinBitRate                348979200

        dwMaxBitRate                697958400

        dwMaxVideoFrameBufferSize     2908160

        dwDefaultFrameInterval         333333

        bFrameIntervalType                  2

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      VideoStreaming Interface Descriptor:

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        bDescriptorType                    36

        bDescriptorSubtype                  7 (FRAME_MJPEG)

        bFrameIndex                         5

        bmCapabilities                   0x00

          Still image unsupported

        wWidth                           2560

        wHeight                          1440

        dwMinBitRate                442368000

        dwMaxBitRate                884736000

        dwMaxVideoFrameBufferSize     3686400

        dwDefaultFrameInterval         333333

        bFrameIntervalType                  2

        dwFrameInterval( 0)            333333

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      VideoStreaming Interface Descriptor:

        bLength                             6

        bDescriptorType                    36

        bDescriptorSubtype                 13 (COLORFORMAT)

        bColorPrimaries                     1 (BT.709,sRGB)

        bTransferCharacteristics            1 (BT.709)

        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))

      Endpoint Descriptor:

        bLength                 7

        bDescriptorType         5

        bEndpointAddress     0x81  EP 1 IN

        bmAttributes            2

          Transfer Type            Bulk

          Synch Type               None

          Usage Type               Data

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    Interface Association:

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      bDescriptorType        11

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      bInterfaceCount         3

      bFunctionClass          1 Audio

      bFunctionSubClass       0 

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      bInterfaceNumber        2

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      bInterfaceClass         1 Audio

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      AudioControl Interface Descriptor:

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        wTerminalType      0x0301 Speaker

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        bDescriptorSubtype      2 (INPUT_TERMINAL)

        bTerminalID            17

        wTerminalType      0x0201 Microphone

        bAssocTerminal          0

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            Sampling Frequency

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    Interface Descriptor:

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          bCountryCode            0 Not supported

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         Report Descriptors: 

           ** UNAVAILABLE **

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          Transfer Type            Interrupt

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    Interface Descriptor:

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      bInterfaceProtocol      0 

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        HID Device Descriptor:

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          bCountryCode            0 Not supported

          bNumDescriptors         1

          bDescriptorType        34 Report

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         Report Descriptors: 

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          Transfer Type            Interrupt

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          Usage Type               Data

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Binary Object Store Descriptor:

  bLength                 5

  bDescriptorType        15

  wTotalLength       0x0032

  bNumDeviceCaps          3

  Platform Device Capability:

    bLength                28

    bDescriptorType        16

    bDevCapabilityType      5

    bReserved               0

    PlatformCapabilityUUID    {d8dd60df-4589-4cc7-9cd2-659d9e648a9f}

    CapabilityData[0]    0x00

    CapabilityData[1]    0x00

    CapabilityData[2]    0x03

    CapabilityData[3]    0x06

    CapabilityData[4]    0xb2

    CapabilityData[5]    0x00

    CapabilityData[6]    0x01

    CapabilityData[7]    0x00

  USB 2.0 Extension Device Capability:

    bLength                 7

    bDescriptorType        16

    bDevCapabilityType      2

    bmAttributes   0x0000050e

      BESL Link Power Management (LPM) Supported

    BESL value     1280 us 

  SuperSpeed USB Device Capability:

    bLength                10

    bDescriptorType        16

    bDevCapabilityType      3

    bmAttributes         0x00

    wSpeedsSupported   0x000c

      Device can operate at High Speed (480Mbps)

      Device can operate at SuperSpeed (5Gbps)

    bFunctionalitySupport   2

      Lowest fully-functional device speed is High Speed (480Mbps)

    bU1DevExitLat          10 micro seconds

    bU2DevExitLat         511 micro seconds

Device Status:     0x0000

  (Bus Powered)

[-- Attachment #5: uvc_xu_descriptor.PNG --]
[-- Type: image/png, Size: 73713 bytes --]

Re: UVCIOC_CTRL_MAP not work

[Ricardo Ribalda]

Hi Hardy

Why are you using:

result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping), &mapping);

instead of

result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);

Can you return the output of:

strace -f  uvc_xu_v4l_mapping_demo

Thanks!

On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi,
>
> # Environment:
>
> OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic)
> Program Language = C Language
>
> # Overview:
>
> We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP` function on PC to create the v4l2 control mapping, but we got error `UVCIOC_CTRL_MAP: Inappropriate ioctl for device`
> Development with `C language` in `Ubuntu 22.04 LTS`
>
> # Description:
>
> We have a custom UVC camera and we can modify the extension unit(XU) by ourself. (USB descriptions reference attachments `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
>
> We make sure that UVCIOC_CTRL_QUERY is work to control our XU item (demo code in attachment `uvc_xu_ioctl_demo.c`)
>
> but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` (demo code in attachment `uvc_xu_v4l_mapping_demo.c`)
>
> # Problems:
>
> 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
>
> Looking forward to your reply,
> Best Regards,
> Hardy#2374
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to whom it is
> addressed and contains information that may be subject to and/or may be
> restricted from disclosure by contract or applicable law. If you are not the
> intended recipient of this email, be advised that any disclosure, copy,
> distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the sender
> that you have received this in error by replying to this message. Then,
> please delete it from your system. Our Privacy Policy is available here
> https://www.msi.com/page/privacy-policy. Thank you.



-- 
Ricardo Ribalda

RE: UVCIOC_CTRL_MAP not work

[hardycheng(鄭易昕)]

[-- Attachment #1: Type: text/plain, Size: 3508 bytes --]

Hi Ricardo,

Thanks for reply,

I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to ` UVCIOC_CTRL_MAP` and got the same error,
Please check attachment for command output `strace -f ./uvc_xu_v4l_mapping_demo`

Best Regards,
Hardy

-----Original Message-----
From: Ricardo Ribalda <ribalda@chromium.org> 
Sent: Friday, April 28, 2023 4:04 PM
To: hardycheng(鄭易昕) <hardycheng@msi.com>
Cc: linux-media@vger.kernel.org
Subject: Re: UVCIOC_CTRL_MAP not work

Hi Hardy

Why are you using:

result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping), &mapping);

instead of

result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);

Can you return the output of:

strace -f  uvc_xu_v4l_mapping_demo

Thanks!

On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi,
>
> # Environment:
>
> OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program 
> Language = C Language
>
> # Overview:
>
> We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP` 
> function on PC to create the v4l2 control mapping, but we got error 
> `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development with `C 
> language` in `Ubuntu 22.04 LTS`
>
> # Description:
>
> We have a custom UVC camera and we can modify the extension unit(XU) 
> by ourself. (USB descriptions reference attachments 
> `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
>
> We make sure that UVCIOC_CTRL_QUERY is work to control our XU item 
> (demo code in attachment `uvc_xu_ioctl_demo.c`)
>
> but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP: 
> Inappropriate ioctl for device` (demo code in attachment 
> `uvc_xu_v4l_mapping_demo.c`)
>
> # Problems:
>
> 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
>
> Looking forward to your reply,
> Best Regards,
> Hardy#2374
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to 
> whom it is addressed and contains information that may be subject to 
> and/or may be restricted from disclosure by contract or applicable 
> law. If you are not the intended recipient of this email, be advised 
> that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the 
> sender that you have received this in error by replying to this 
> message. Then, please delete it from your system. Our Privacy Policy 
> is available here https://www.msi.com/page/privacy-policy. Thank you.



--
Ricardo Ribalda


*****CONFIDENTIAL INFORMATION*****

This email is intended only for the use of the person or entity to whom it is
addressed and contains information that may be subject to and/or may be
restricted from disclosure by contract or applicable law. If you are not the 
intended recipient of this email, be advised that any disclosure, copy, 
distribution or use of the contents of this message is strictly prohibited. 
If you are not the intended recipient of this email, please notify the sender 
that you have received this in error by replying to this message. Then, 
please delete it from your system. Our Privacy Policy is available here 
https://www.msi.com/page/privacy-policy. Thank you.

[-- Attachment #2: strace_20230428.log --]
[-- Type: application/octet-stream, Size: 3290 bytes --]

root@ubuntu22:/ms5548_test# strace -f ./uvc_xu_v4l_mapping_demo
execve("./uvc_xu_v4l_mapping_demo", ["./uvc_xu_v4l_mapping_demo"], 0x7fff9c969de8 /* 76 vars */) = 0
brk(NULL)                               = 0x55baa8504000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffc59064f70) = -1 EINVAL (Invalid argument)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb94c41f000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=65987, ...}, AT_EMPTY_PATH) = 0
mmap(NULL, 65987, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fb94c40e000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\237\2\0\0\0\0\0"..., 832) = 832
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0 \0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0"..., 48, 848) = 48
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0i8\235HZ\227\223\333\350s\360\352,\223\340."..., 68, 896) = 68
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=2216304, ...}, AT_EMPTY_PATH) = 0
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
mmap(NULL, 2260560, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fb94c000000
mmap(0x7fb94c028000, 1658880, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x28000) = 0x7fb94c028000
mmap(0x7fb94c1bd000, 360448, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bd000) = 0x7fb94c1bd000
mmap(0x7fb94c215000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x214000) = 0x7fb94c215000
mmap(0x7fb94c21b000, 52816, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fb94c21b000
close(3)                                = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb94c40b000
arch_prctl(ARCH_SET_FS, 0x7fb94c40b740) = 0
set_tid_address(0x7fb94c40ba10)         = 6285
set_robust_list(0x7fb94c40ba20, 24)     = 0
rseq(0x7fb94c40c0e0, 0x20, 0, 0x53053053) = 0
mprotect(0x7fb94c215000, 16384, PROT_READ) = 0
mprotect(0x55baa6c47000, 4096, PROT_READ) = 0
mprotect(0x7fb94c459000, 8192, PROT_READ) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
munmap(0x7fb94c40e000, 65987)           = 0
openat(AT_FDCWD, "/dev/video0", O_RDWR) = 3
ioctl(3, UVCIOC_CTRL_MAP, 0x7ffc59064fb0) = -1 ENOTTY (Inappropriate ioctl for device)
dup(2)                                  = 4
fcntl(4, F_GETFL)                       = 0x2 (flags O_RDWR)
getrandom("\x87\xd1\x7a\x35\xc1\x4e\xa8\x44", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55baa8504000
brk(0x55baa8525000)                     = 0x55baa8525000
newfstatat(4, "", {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0), ...}, AT_EMPTY_PATH) = 0
write(4, "UVCIOC_CTRL_MAP: Inappropriate i"..., 48UVCIOC_CTRL_MAP: Inappropriate ioctl for device
) = 48
close(4)                                = 0
close(3)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++

Re: UVCIOC_CTRL_MAP not work

[Ricardo Ribalda]

Hi Hardy

Seems like you can only add mappings for  V4L2_CTRL_TYPE_INTEGER,
V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON  and V4L2_CTRL_TYPE_MENU.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/media/usb/uvc/uvc_v4l2.c#n130

You are trying to add a map for a V4L2_CTRL_TYPE_STRING

Regards

On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi Ricardo,
>
> Thanks for reply,
>
> I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to ` UVCIOC_CTRL_MAP` and got the same error,
> Please check attachment for command output `strace -f ./uvc_xu_v4l_mapping_demo`
>
> Best Regards,
> Hardy
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@chromium.org>
> Sent: Friday, April 28, 2023 4:04 PM
> To: hardycheng(鄭易昕) <hardycheng@msi.com>
> Cc: linux-media@vger.kernel.org
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> Hi Hardy
>
> Why are you using:
>
> result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping), &mapping);
>
> instead of
>
> result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
>
> Can you return the output of:
>
> strace -f  uvc_xu_v4l_mapping_demo
>
> Thanks!
>
> On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> >
> > Hi,
> >
> > # Environment:
> >
> > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program
> > Language = C Language
> >
> > # Overview:
> >
> > We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP`
> > function on PC to create the v4l2 control mapping, but we got error
> > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development with `C
> > language` in `Ubuntu 22.04 LTS`
> >
> > # Description:
> >
> > We have a custom UVC camera and we can modify the extension unit(XU)
> > by ourself. (USB descriptions reference attachments
> > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> >
> > We make sure that UVCIOC_CTRL_QUERY is work to control our XU item
> > (demo code in attachment `uvc_xu_ioctl_demo.c`)
> >
> > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > Inappropriate ioctl for device` (demo code in attachment
> > `uvc_xu_v4l_mapping_demo.c`)
> >
> > # Problems:
> >
> > 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> > 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
> >
> > Looking forward to your reply,
> > Best Regards,
> > Hardy#2374
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to
> > whom it is addressed and contains information that may be subject to
> > and/or may be restricted from disclosure by contract or applicable
> > law. If you are not the intended recipient of this email, be advised
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify the
> > sender that you have received this in error by replying to this
> > message. Then, please delete it from your system. Our Privacy Policy
> > is available here https://www.msi.com/page/privacy-policy. Thank you.
>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to whom it is
> addressed and contains information that may be subject to and/or may be
> restricted from disclosure by contract or applicable law. If you are not the
> intended recipient of this email, be advised that any disclosure, copy,
> distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the sender
> that you have received this in error by replying to this message. Then,
> please delete it from your system. Our Privacy Policy is available here
> https://www.msi.com/page/privacy-policy. Thank you.



-- 
Ricardo Ribalda

RE: UVCIOC_CTRL_MAP not work

[hardycheng(鄭易昕)]

[-- Attachment #1: Type: text/plain, Size: 5870 bytes --]

Hi Ricardo,

So I modify the `uvc_xu_control_mapping` struct as follows:
(full code reference attachment `uvc_xu_v4l_mapping_demo.c`)
struct uvc_xu_control_mapping mapping = {
        .id = 0x01,
        .name = "My Extension Unit",
        .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
        .selector = 0x01,
        .size = 32,
        .offset = 0,
        .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
        .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
        .menu_info = NULL,
        .menu_count = 0,
        .reserved = {0},
};

And I got difference error message `UVCIOC_CTRL_MAP: No such file or directory`
Please check attachment `strace_20230428_2.log` for strace output


Best Regards,
Hardy


-----Original Message-----
From: Ricardo Ribalda <ribalda@chromium.org> 
Sent: Friday, April 28, 2023 4:26 PM
To: hardycheng(鄭易昕) <hardycheng@msi.com>
Cc: linux-media@vger.kernel.org
Subject: Re: UVCIOC_CTRL_MAP not work

Hi Hardy

Seems like you can only add mappings for  V4L2_CTRL_TYPE_INTEGER, V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON  and V4L2_CTRL_TYPE_MENU.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/media/usb/uvc/uvc_v4l2.c#n130

You are trying to add a map for a V4L2_CTRL_TYPE_STRING

Regards

On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi Ricardo,
>
> Thanks for reply,
>
> I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to ` 
> UVCIOC_CTRL_MAP` and got the same error, Please check attachment for 
> command output `strace -f ./uvc_xu_v4l_mapping_demo`
>
> Best Regards,
> Hardy
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@chromium.org>
> Sent: Friday, April 28, 2023 4:04 PM
> To: hardycheng(鄭易昕) <hardycheng@msi.com>
> Cc: linux-media@vger.kernel.org
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> Hi Hardy
>
> Why are you using:
>
> result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping), 
> &mapping);
>
> instead of
>
> result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
>
> Can you return the output of:
>
> strace -f  uvc_xu_v4l_mapping_demo
>
> Thanks!
>
> On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> >
> > Hi,
> >
> > # Environment:
> >
> > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program 
> > Language = C Language
> >
> > # Overview:
> >
> > We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP` 
> > function on PC to create the v4l2 control mapping, but we got error
> > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development with 
> > `C language` in `Ubuntu 22.04 LTS`
> >
> > # Description:
> >
> > We have a custom UVC camera and we can modify the extension unit(XU) 
> > by ourself. (USB descriptions reference attachments 
> > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> >
> > We make sure that UVCIOC_CTRL_QUERY is work to control our XU item 
> > (demo code in attachment `uvc_xu_ioctl_demo.c`)
> >
> > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > Inappropriate ioctl for device` (demo code in attachment
> > `uvc_xu_v4l_mapping_demo.c`)
> >
> > # Problems:
> >
> > 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> > 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
> >
> > Looking forward to your reply,
> > Best Regards,
> > Hardy#2374
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to 
> > whom it is addressed and contains information that may be subject to 
> > and/or may be restricted from disclosure by contract or applicable 
> > law. If you are not the intended recipient of this email, be advised 
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify 
> > the sender that you have received this in error by replying to this 
> > message. Then, please delete it from your system. Our Privacy Policy 
> > is available here https://www.msi.com/page/privacy-policy. Thank you.
>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to 
> whom it is addressed and contains information that may be subject to 
> and/or may be restricted from disclosure by contract or applicable 
> law. If you are not the intended recipient of this email, be advised 
> that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the 
> sender that you have received this in error by replying to this 
> message. Then, please delete it from your system. Our Privacy Policy 
> is available here https://www.msi.com/page/privacy-policy. Thank you.



--
Ricardo Ribalda


*****CONFIDENTIAL INFORMATION*****

This email is intended only for the use of the person or entity to whom it is
addressed and contains information that may be subject to and/or may be
restricted from disclosure by contract or applicable law. If you are not the 
intended recipient of this email, be advised that any disclosure, copy, 
distribution or use of the contents of this message is strictly prohibited. 
If you are not the intended recipient of this email, please notify the sender 
that you have received this in error by replying to this message. Then, 
please delete it from your system. Our Privacy Policy is available here 
https://www.msi.com/page/privacy-policy. Thank you.

[-- Attachment #2: uvc_xu_v4l_mapping_demo.c --]
[-- Type: text/plain, Size: 1020 bytes --]

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/usb/video.h>
#include <linux/uvcvideo.h>
#include <linux/videodev2.h>

int main(){
    int result;
    int fd = open("/dev/video0", O_RDWR);
    if(fd < 0) {
        perror("File Open Fail");
        goto close;
    }

    struct uvc_xu_control_mapping mapping = {
        .id = 0x01,
        .name = "My Extension Unit",
        .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
        .selector = 0x01,
        .size = 32,
        .offset = 0,
        .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
        .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
        .menu_info = NULL,
        .menu_count = 0,
        .reserved = {0},
    };

    result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
    if (result != 0) {
        perror("UVCIOC_CTRL_MAP");
        goto close;
    }

    close:
    close(fd);
    return 0;
}

[-- Attachment #3: strace_20230428_2.log --]
[-- Type: application/octet-stream, Size: 3280 bytes --]

root@ubuntu22:/ms5548_test# strace -f ./uvc_xu_v4l_mapping_demo
execve("./uvc_xu_v4l_mapping_demo", ["./uvc_xu_v4l_mapping_demo"], 0x7fff918670d8 /* 76 vars */) = 0
brk(NULL)                               = 0x55a9e3bd7000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffdcb619c10) = -1 EINVAL (Invalid argument)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2dffcff000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=65987, ...}, AT_EMPTY_PATH) = 0
mmap(NULL, 65987, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2dffcee000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\237\2\0\0\0\0\0"..., 832) = 832
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0 \0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0"..., 48, 848) = 48
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0i8\235HZ\227\223\333\350s\360\352,\223\340."..., 68, 896) = 68
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=2216304, ...}, AT_EMPTY_PATH) = 0
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
mmap(NULL, 2260560, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2dffa00000
mmap(0x7f2dffa28000, 1658880, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x28000) = 0x7f2dffa28000
mmap(0x7f2dffbbd000, 360448, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bd000) = 0x7f2dffbbd000
mmap(0x7f2dffc15000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x214000) = 0x7f2dffc15000
mmap(0x7f2dffc1b000, 52816, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2dffc1b000
close(3)                                = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2dffceb000
arch_prctl(ARCH_SET_FS, 0x7f2dffceb740) = 0
set_tid_address(0x7f2dffceba10)         = 6662
set_robust_list(0x7f2dffceba20, 24)     = 0
rseq(0x7f2dffcec0e0, 0x20, 0, 0x53053053) = 0
mprotect(0x7f2dffc15000, 16384, PROT_READ) = 0
mprotect(0x55a9e30a1000, 4096, PROT_READ) = 0
mprotect(0x7f2dffd39000, 8192, PROT_READ) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
munmap(0x7f2dffcee000, 65987)           = 0
openat(AT_FDCWD, "/dev/video0", O_RDWR) = 3
ioctl(3, UVCIOC_CTRL_MAP, 0x7ffdcb619c50) = -1 ENOENT (No such file or directory)
dup(2)                                  = 4
fcntl(4, F_GETFL)                       = 0x2 (flags O_RDWR)
getrandom("\xab\x1f\x34\x15\xb8\x09\x28\x79", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55a9e3bd7000
brk(0x55a9e3bf8000)                     = 0x55a9e3bf8000
newfstatat(4, "", {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0), ...}, AT_EMPTY_PATH) = 0
write(4, "UVCIOC_CTRL_MAP: No such file or"..., 43UVCIOC_CTRL_MAP: No such file or directory
) = 43
close(4)                                = 0
close(3)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++

Re: UVCIOC_CTRL_MAP not work

[Ricardo Ribalda]

Hi Hardy

try running:

echo 0xffffffff > /sys/module/uvcvideo/parameters/trace

and then your program

and then dmesg

It will tell you where it got stock

Regards!

On Fri, 28 Apr 2023 at 10:38, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi Ricardo,
>
> So I modify the `uvc_xu_control_mapping` struct as follows:
> (full code reference attachment `uvc_xu_v4l_mapping_demo.c`)
> struct uvc_xu_control_mapping mapping = {
>         .id = 0x01,
>         .name = "My Extension Unit",
>         .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
>         .selector = 0x01,
>         .size = 32,
>         .offset = 0,
>         .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
>         .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
>         .menu_info = NULL,
>         .menu_count = 0,
>         .reserved = {0},
> };
>
> And I got difference error message `UVCIOC_CTRL_MAP: No such file or directory`
> Please check attachment `strace_20230428_2.log` for strace output
>
>
> Best Regards,
> Hardy
>
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@chromium.org>
> Sent: Friday, April 28, 2023 4:26 PM
> To: hardycheng(鄭易昕) <hardycheng@msi.com>
> Cc: linux-media@vger.kernel.org
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> Hi Hardy
>
> Seems like you can only add mappings for  V4L2_CTRL_TYPE_INTEGER, V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON  and V4L2_CTRL_TYPE_MENU.
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/media/usb/uvc/uvc_v4l2.c#n130
>
> You are trying to add a map for a V4L2_CTRL_TYPE_STRING
>
> Regards
>
> On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> >
> > Hi Ricardo,
> >
> > Thanks for reply,
> >
> > I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to `
> > UVCIOC_CTRL_MAP` and got the same error, Please check attachment for
> > command output `strace -f ./uvc_xu_v4l_mapping_demo`
> >
> > Best Regards,
> > Hardy
> >
> > -----Original Message-----
> > From: Ricardo Ribalda <ribalda@chromium.org>
> > Sent: Friday, April 28, 2023 4:04 PM
> > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > Cc: linux-media@vger.kernel.org
> > Subject: Re: UVCIOC_CTRL_MAP not work
> >
> > Hi Hardy
> >
> > Why are you using:
> >
> > result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping),
> > &mapping);
> >
> > instead of
> >
> > result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
> >
> > Can you return the output of:
> >
> > strace -f  uvc_xu_v4l_mapping_demo
> >
> > Thanks!
> >
> > On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > >
> > > Hi,
> > >
> > > # Environment:
> > >
> > > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program
> > > Language = C Language
> > >
> > > # Overview:
> > >
> > > We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP`
> > > function on PC to create the v4l2 control mapping, but we got error
> > > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development with
> > > `C language` in `Ubuntu 22.04 LTS`
> > >
> > > # Description:
> > >
> > > We have a custom UVC camera and we can modify the extension unit(XU)
> > > by ourself. (USB descriptions reference attachments
> > > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> > >
> > > We make sure that UVCIOC_CTRL_QUERY is work to control our XU item
> > > (demo code in attachment `uvc_xu_ioctl_demo.c`)
> > >
> > > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > > Inappropriate ioctl for device` (demo code in attachment
> > > `uvc_xu_v4l_mapping_demo.c`)
> > >
> > > # Problems:
> > >
> > > 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> > > 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > > 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
> > >
> > > Looking forward to your reply,
> > > Best Regards,
> > > Hardy#2374
> > >
> > > *****CONFIDENTIAL INFORMATION*****
> > >
> > > This email is intended only for the use of the person or entity to
> > > whom it is addressed and contains information that may be subject to
> > > and/or may be restricted from disclosure by contract or applicable
> > > law. If you are not the intended recipient of this email, be advised
> > > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > If you are not the intended recipient of this email, please notify
> > > the sender that you have received this in error by replying to this
> > > message. Then, please delete it from your system. Our Privacy Policy
> > > is available here https://www.msi.com/page/privacy-policy. Thank you.
> >
> >
> >
> > --
> > Ricardo Ribalda
> >
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to
> > whom it is addressed and contains information that may be subject to
> > and/or may be restricted from disclosure by contract or applicable
> > law. If you are not the intended recipient of this email, be advised
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify the
> > sender that you have received this in error by replying to this
> > message. Then, please delete it from your system. Our Privacy Policy
> > is available here https://www.msi.com/page/privacy-policy. Thank you.
>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to whom it is
> addressed and contains information that may be subject to and/or may be
> restricted from disclosure by contract or applicable law. If you are not the
> intended recipient of this email, be advised that any disclosure, copy,
> distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the sender
> that you have received this in error by replying to this message. Then,
> please delete it from your system. Our Privacy Policy is available here
> https://www.msi.com/page/privacy-policy. Thank you.



-- 
Ricardo Ribalda

RE: UVCIOC_CTRL_MAP not work

[hardycheng(鄭易昕)]

Hi Ricardo,

Thank you for such a quick reply.
Follow your advice, but I just got few logs in dmesg

[ 9452.677337] usb 1-1: uvc_v4l2_open
[ 9452.725254] usb 1-1: Resuming interface 0
[ 9452.725258] usb 1-1: Resuming interface 1
[ 9452.751971] usb 1-1: uvc_v4l2_release
[ 9455.236973] usb 1-1: Suspending interface 1
[ 9455.236977] usb 1-1: Suspending interface 0

Is there any way to get more debug message about this issue?


Best Regards,
Hardy#2374


-----Original Message-----
From: Ricardo Ribalda <ribalda@chromium.org> 
Sent: Friday, April 28, 2023 4:45 PM
To: hardycheng(鄭易昕) <hardycheng@msi.com>
Cc: linux-media@vger.kernel.org
Subject: Re: UVCIOC_CTRL_MAP not work

Hi Hardy

try running:

echo 0xffffffff > /sys/module/uvcvideo/parameters/trace

and then your program

and then dmesg

It will tell you where it got stock

Regards!

On Fri, 28 Apr 2023 at 10:38, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi Ricardo,
>
> So I modify the `uvc_xu_control_mapping` struct as follows:
> (full code reference attachment `uvc_xu_v4l_mapping_demo.c`) struct 
> uvc_xu_control_mapping mapping = {
>         .id = 0x01,
>         .name = "My Extension Unit",
>         .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
>         .selector = 0x01,
>         .size = 32,
>         .offset = 0,
>         .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
>         .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
>         .menu_info = NULL,
>         .menu_count = 0,
>         .reserved = {0},
> };
>
> And I got difference error message `UVCIOC_CTRL_MAP: No such file or 
> directory` Please check attachment `strace_20230428_2.log` for strace 
> output
>
>
> Best Regards,
> Hardy
>
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@chromium.org>
> Sent: Friday, April 28, 2023 4:26 PM
> To: hardycheng(鄭易昕) <hardycheng@msi.com>
> Cc: linux-media@vger.kernel.org
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> Hi Hardy
>
> Seems like you can only add mappings for  V4L2_CTRL_TYPE_INTEGER, V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON  and V4L2_CTRL_TYPE_MENU.
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tre
> e/drivers/media/usb/uvc/uvc_v4l2.c#n130
>
> You are trying to add a map for a V4L2_CTRL_TYPE_STRING
>
> Regards
>
> On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> >
> > Hi Ricardo,
> >
> > Thanks for reply,
> >
> > I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to ` 
> > UVCIOC_CTRL_MAP` and got the same error, Please check attachment for 
> > command output `strace -f ./uvc_xu_v4l_mapping_demo`
> >
> > Best Regards,
> > Hardy
> >
> > -----Original Message-----
> > From: Ricardo Ribalda <ribalda@chromium.org>
> > Sent: Friday, April 28, 2023 4:04 PM
> > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > Cc: linux-media@vger.kernel.org
> > Subject: Re: UVCIOC_CTRL_MAP not work
> >
> > Hi Hardy
> >
> > Why are you using:
> >
> > result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping), 
> > &mapping);
> >
> > instead of
> >
> > result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
> >
> > Can you return the output of:
> >
> > strace -f  uvc_xu_v4l_mapping_demo
> >
> > Thanks!
> >
> > On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > >
> > > Hi,
> > >
> > > # Environment:
> > >
> > > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program 
> > > Language = C Language
> > >
> > > # Overview:
> > >
> > > We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP` 
> > > function on PC to create the v4l2 control mapping, but we got 
> > > error
> > > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development with 
> > > `C language` in `Ubuntu 22.04 LTS`
> > >
> > > # Description:
> > >
> > > We have a custom UVC camera and we can modify the extension 
> > > unit(XU) by ourself. (USB descriptions reference attachments 
> > > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> > >
> > > We make sure that UVCIOC_CTRL_QUERY is work to control our XU item 
> > > (demo code in attachment `uvc_xu_ioctl_demo.c`)
> > >
> > > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > > Inappropriate ioctl for device` (demo code in attachment
> > > `uvc_xu_v4l_mapping_demo.c`)
> > >
> > > # Problems:
> > >
> > > 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> > > 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > > 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
> > >
> > > Looking forward to your reply,
> > > Best Regards,
> > > Hardy#2374
> > >
> > > *****CONFIDENTIAL INFORMATION*****
> > >
> > > This email is intended only for the use of the person or entity to 
> > > whom it is addressed and contains information that may be subject 
> > > to and/or may be restricted from disclosure by contract or 
> > > applicable law. If you are not the intended recipient of this 
> > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > If you are not the intended recipient of this email, please notify 
> > > the sender that you have received this in error by replying to 
> > > this message. Then, please delete it from your system. Our Privacy 
> > > Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> >
> >
> >
> > --
> > Ricardo Ribalda
> >
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to 
> > whom it is addressed and contains information that may be subject to 
> > and/or may be restricted from disclosure by contract or applicable 
> > law. If you are not the intended recipient of this email, be advised 
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify 
> > the sender that you have received this in error by replying to this 
> > message. Then, please delete it from your system. Our Privacy Policy 
> > is available here https://www.msi.com/page/privacy-policy. Thank you.
>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to 
> whom it is addressed and contains information that may be subject to 
> and/or may be restricted from disclosure by contract or applicable 
> law. If you are not the intended recipient of this email, be advised 
> that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the 
> sender that you have received this in error by replying to this 
> message. Then, please delete it from your system. Our Privacy Policy 
> is available here https://www.msi.com/page/privacy-policy. Thank you.



--
Ricardo Ribalda


*****CONFIDENTIAL INFORMATION*****

This email is intended only for the use of the person or entity to whom it is
addressed and contains information that may be subject to and/or may be
restricted from disclosure by contract or applicable law. If you are not the 
intended recipient of this email, be advised that any disclosure, copy, 
distribution or use of the contents of this message is strictly prohibited. 
If you are not the intended recipient of this email, please notify the sender 
that you have received this in error by replying to this message. Then, 
please delete it from your system. Our Privacy Policy is available here 
https://www.msi.com/page/privacy-policy. Thank you.

Re: UVCIOC_CTRL_MAP not work

[Ricardo Ribalda]

What about:

rmmod uvcvideo
modprobe uvcvideo trace=0xffffffff

then run your program

You might be able to figure out what xu controls are discovered.


On Fri, 28 Apr 2023 at 10:50, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi Ricardo,
>
> Thank you for such a quick reply.
> Follow your advice, but I just got few logs in dmesg
>
> [ 9452.677337] usb 1-1: uvc_v4l2_open
> [ 9452.725254] usb 1-1: Resuming interface 0
> [ 9452.725258] usb 1-1: Resuming interface 1
> [ 9452.751971] usb 1-1: uvc_v4l2_release
> [ 9455.236973] usb 1-1: Suspending interface 1
> [ 9455.236977] usb 1-1: Suspending interface 0
>
> Is there any way to get more debug message about this issue?
>
>
> Best Regards,
> Hardy#2374
>
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@chromium.org>
> Sent: Friday, April 28, 2023 4:45 PM
> To: hardycheng(鄭易昕) <hardycheng@msi.com>
> Cc: linux-media@vger.kernel.org
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> Hi Hardy
>
> try running:
>
> echo 0xffffffff > /sys/module/uvcvideo/parameters/trace
>
> and then your program
>
> and then dmesg
>
> It will tell you where it got stock
>
> Regards!
>
> On Fri, 28 Apr 2023 at 10:38, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> >
> > Hi Ricardo,
> >
> > So I modify the `uvc_xu_control_mapping` struct as follows:
> > (full code reference attachment `uvc_xu_v4l_mapping_demo.c`) struct
> > uvc_xu_control_mapping mapping = {
> >         .id = 0x01,
> >         .name = "My Extension Unit",
> >         .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
> >         .selector = 0x01,
> >         .size = 32,
> >         .offset = 0,
> >         .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
> >         .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
> >         .menu_info = NULL,
> >         .menu_count = 0,
> >         .reserved = {0},
> > };
> >
> > And I got difference error message `UVCIOC_CTRL_MAP: No such file or
> > directory` Please check attachment `strace_20230428_2.log` for strace
> > output
> >
> >
> > Best Regards,
> > Hardy
> >
> >
> > -----Original Message-----
> > From: Ricardo Ribalda <ribalda@chromium.org>
> > Sent: Friday, April 28, 2023 4:26 PM
> > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > Cc: linux-media@vger.kernel.org
> > Subject: Re: UVCIOC_CTRL_MAP not work
> >
> > Hi Hardy
> >
> > Seems like you can only add mappings for  V4L2_CTRL_TYPE_INTEGER, V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON  and V4L2_CTRL_TYPE_MENU.
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tre
> > e/drivers/media/usb/uvc/uvc_v4l2.c#n130
> >
> > You are trying to add a map for a V4L2_CTRL_TYPE_STRING
> >
> > Regards
> >
> > On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > >
> > > Hi Ricardo,
> > >
> > > Thanks for reply,
> > >
> > > I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to `
> > > UVCIOC_CTRL_MAP` and got the same error, Please check attachment for
> > > command output `strace -f ./uvc_xu_v4l_mapping_demo`
> > >
> > > Best Regards,
> > > Hardy
> > >
> > > -----Original Message-----
> > > From: Ricardo Ribalda <ribalda@chromium.org>
> > > Sent: Friday, April 28, 2023 4:04 PM
> > > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > > Cc: linux-media@vger.kernel.org
> > > Subject: Re: UVCIOC_CTRL_MAP not work
> > >
> > > Hi Hardy
> > >
> > > Why are you using:
> > >
> > > result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping),
> > > &mapping);
> > >
> > > instead of
> > >
> > > result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
> > >
> > > Can you return the output of:
> > >
> > > strace -f  uvc_xu_v4l_mapping_demo
> > >
> > > Thanks!
> > >
> > > On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > > >
> > > > Hi,
> > > >
> > > > # Environment:
> > > >
> > > > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program
> > > > Language = C Language
> > > >
> > > > # Overview:
> > > >
> > > > We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP`
> > > > function on PC to create the v4l2 control mapping, but we got
> > > > error
> > > > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development with
> > > > `C language` in `Ubuntu 22.04 LTS`
> > > >
> > > > # Description:
> > > >
> > > > We have a custom UVC camera and we can modify the extension
> > > > unit(XU) by ourself. (USB descriptions reference attachments
> > > > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> > > >
> > > > We make sure that UVCIOC_CTRL_QUERY is work to control our XU item
> > > > (demo code in attachment `uvc_xu_ioctl_demo.c`)
> > > >
> > > > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > > > Inappropriate ioctl for device` (demo code in attachment
> > > > `uvc_xu_v4l_mapping_demo.c`)
> > > >
> > > > # Problems:
> > > >
> > > > 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> > > > 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > > > 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
> > > >
> > > > Looking forward to your reply,
> > > > Best Regards,
> > > > Hardy#2374
> > > >
> > > > *****CONFIDENTIAL INFORMATION*****
> > > >
> > > > This email is intended only for the use of the person or entity to
> > > > whom it is addressed and contains information that may be subject
> > > > to and/or may be restricted from disclosure by contract or
> > > > applicable law. If you are not the intended recipient of this
> > > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > > If you are not the intended recipient of this email, please notify
> > > > the sender that you have received this in error by replying to
> > > > this message. Then, please delete it from your system. Our Privacy
> > > > Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> > >
> > >
> > >
> > > --
> > > Ricardo Ribalda
> > >
> > >
> > > *****CONFIDENTIAL INFORMATION*****
> > >
> > > This email is intended only for the use of the person or entity to
> > > whom it is addressed and contains information that may be subject to
> > > and/or may be restricted from disclosure by contract or applicable
> > > law. If you are not the intended recipient of this email, be advised
> > > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > If you are not the intended recipient of this email, please notify
> > > the sender that you have received this in error by replying to this
> > > message. Then, please delete it from your system. Our Privacy Policy
> > > is available here https://www.msi.com/page/privacy-policy. Thank you.
> >
> >
> >
> > --
> > Ricardo Ribalda
> >
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to
> > whom it is addressed and contains information that may be subject to
> > and/or may be restricted from disclosure by contract or applicable
> > law. If you are not the intended recipient of this email, be advised
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify the
> > sender that you have received this in error by replying to this
> > message. Then, please delete it from your system. Our Privacy Policy
> > is available here https://www.msi.com/page/privacy-policy. Thank you.
>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to whom it is
> addressed and contains information that may be subject to and/or may be
> restricted from disclosure by contract or applicable law. If you are not the
> intended recipient of this email, be advised that any disclosure, copy,
> distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the sender
> that you have received this in error by replying to this message. Then,
> please delete it from your system. Our Privacy Policy is available here
> https://www.msi.com/page/privacy-policy. Thank you.



-- 
Ricardo Ribalda

RE: UVCIOC_CTRL_MAP not work

[hardycheng(鄭易昕)]

[-- Attachment #1: Type: text/plain, Size: 9975 bytes --]

Hi Ricardo,

Seems like no more message of XU controls,
I run my program in time [10246.557462], 
the relevant message is as follows:
[10246.557462] usb 1-1: uvc_v4l2_open
[10246.625260] usb 1-1: Resuming interface 0
[10246.625266] usb 1-1: Resuming interface 1
[10246.645515] usb 1-1: uvc_v4l2_release

Please check attachment of dmseg output `dmesg_20230428.log`


Best Regards,
Hardy#2374


-----Original Message-----
From: Ricardo Ribalda <ribalda@chromium.org> 
Sent: Friday, April 28, 2023 4:58 PM
To: hardycheng(鄭易昕) <hardycheng@msi.com>
Cc: linux-media@vger.kernel.org
Subject: Re: UVCIOC_CTRL_MAP not work

What about:

rmmod uvcvideo
modprobe uvcvideo trace=0xffffffff

then run your program

You might be able to figure out what xu controls are discovered.


On Fri, 28 Apr 2023 at 10:50, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi Ricardo,
>
> Thank you for such a quick reply.
> Follow your advice, but I just got few logs in dmesg
>
> [ 9452.677337] usb 1-1: uvc_v4l2_open
> [ 9452.725254] usb 1-1: Resuming interface 0 [ 9452.725258] usb 1-1: 
> Resuming interface 1 [ 9452.751971] usb 1-1: uvc_v4l2_release [ 
> 9455.236973] usb 1-1: Suspending interface 1 [ 9455.236977] usb 1-1: 
> Suspending interface 0
>
> Is there any way to get more debug message about this issue?
>
>
> Best Regards,
> Hardy#2374
>
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@chromium.org>
> Sent: Friday, April 28, 2023 4:45 PM
> To: hardycheng(鄭易昕) <hardycheng@msi.com>
> Cc: linux-media@vger.kernel.org
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> Hi Hardy
>
> try running:
>
> echo 0xffffffff > /sys/module/uvcvideo/parameters/trace
>
> and then your program
>
> and then dmesg
>
> It will tell you where it got stock
>
> Regards!
>
> On Fri, 28 Apr 2023 at 10:38, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> >
> > Hi Ricardo,
> >
> > So I modify the `uvc_xu_control_mapping` struct as follows:
> > (full code reference attachment `uvc_xu_v4l_mapping_demo.c`) struct 
> > uvc_xu_control_mapping mapping = {
> >         .id = 0x01,
> >         .name = "My Extension Unit",
> >         .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
> >         .selector = 0x01,
> >         .size = 32,
> >         .offset = 0,
> >         .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
> >         .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
> >         .menu_info = NULL,
> >         .menu_count = 0,
> >         .reserved = {0},
> > };
> >
> > And I got difference error message `UVCIOC_CTRL_MAP: No such file or 
> > directory` Please check attachment `strace_20230428_2.log` for 
> > strace output
> >
> >
> > Best Regards,
> > Hardy
> >
> >
> > -----Original Message-----
> > From: Ricardo Ribalda <ribalda@chromium.org>
> > Sent: Friday, April 28, 2023 4:26 PM
> > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > Cc: linux-media@vger.kernel.org
> > Subject: Re: UVCIOC_CTRL_MAP not work
> >
> > Hi Hardy
> >
> > Seems like you can only add mappings for  V4L2_CTRL_TYPE_INTEGER, V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON  and V4L2_CTRL_TYPE_MENU.
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/t
> > re
> > e/drivers/media/usb/uvc/uvc_v4l2.c#n130
> >
> > You are trying to add a map for a V4L2_CTRL_TYPE_STRING
> >
> > Regards
> >
> > On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > >
> > > Hi Ricardo,
> > >
> > > Thanks for reply,
> > >
> > > I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to ` 
> > > UVCIOC_CTRL_MAP` and got the same error, Please check attachment 
> > > for command output `strace -f ./uvc_xu_v4l_mapping_demo`
> > >
> > > Best Regards,
> > > Hardy
> > >
> > > -----Original Message-----
> > > From: Ricardo Ribalda <ribalda@chromium.org>
> > > Sent: Friday, April 28, 2023 4:04 PM
> > > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > > Cc: linux-media@vger.kernel.org
> > > Subject: Re: UVCIOC_CTRL_MAP not work
> > >
> > > Hi Hardy
> > >
> > > Why are you using:
> > >
> > > result = ioctl(fd, _IOWR('u', 0x20, struct 
> > > uvc_xu_control_mapping), &mapping);
> > >
> > > instead of
> > >
> > > result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
> > >
> > > Can you return the output of:
> > >
> > > strace -f  uvc_xu_v4l_mapping_demo
> > >
> > > Thanks!
> > >
> > > On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > > >
> > > > Hi,
> > > >
> > > > # Environment:
> > > >
> > > > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program 
> > > > Language = C Language
> > > >
> > > > # Overview:
> > > >
> > > > We plug in our UVC camera to PC, and try to use 
> > > > `UVCIOC_CTRL_MAP` function on PC to create the v4l2 control 
> > > > mapping, but we got error
> > > > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development 
> > > > with `C language` in `Ubuntu 22.04 LTS`
> > > >
> > > > # Description:
> > > >
> > > > We have a custom UVC camera and we can modify the extension
> > > > unit(XU) by ourself. (USB descriptions reference attachments 
> > > > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> > > >
> > > > We make sure that UVCIOC_CTRL_QUERY is work to control our XU 
> > > > item (demo code in attachment `uvc_xu_ioctl_demo.c`)
> > > >
> > > > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > > > Inappropriate ioctl for device` (demo code in attachment
> > > > `uvc_xu_v4l_mapping_demo.c`)
> > > >
> > > > # Problems:
> > > >
> > > > 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> > > > 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > > > 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
> > > >
> > > > Looking forward to your reply,
> > > > Best Regards,
> > > > Hardy#2374
> > > >
> > > > *****CONFIDENTIAL INFORMATION*****
> > > >
> > > > This email is intended only for the use of the person or entity 
> > > > to whom it is addressed and contains information that may be 
> > > > subject to and/or may be restricted from disclosure by contract 
> > > > or applicable law. If you are not the intended recipient of this 
> > > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > > If you are not the intended recipient of this email, please 
> > > > notify the sender that you have received this in error by 
> > > > replying to this message. Then, please delete it from your 
> > > > system. Our Privacy Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> > >
> > >
> > >
> > > --
> > > Ricardo Ribalda
> > >
> > >
> > > *****CONFIDENTIAL INFORMATION*****
> > >
> > > This email is intended only for the use of the person or entity to 
> > > whom it is addressed and contains information that may be subject 
> > > to and/or may be restricted from disclosure by contract or 
> > > applicable law. If you are not the intended recipient of this 
> > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > If you are not the intended recipient of this email, please notify 
> > > the sender that you have received this in error by replying to 
> > > this message. Then, please delete it from your system. Our Privacy 
> > > Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> >
> >
> >
> > --
> > Ricardo Ribalda
> >
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to 
> > whom it is addressed and contains information that may be subject to 
> > and/or may be restricted from disclosure by contract or applicable 
> > law. If you are not the intended recipient of this email, be advised 
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify 
> > the sender that you have received this in error by replying to this 
> > message. Then, please delete it from your system. Our Privacy Policy 
> > is available here https://www.msi.com/page/privacy-policy. Thank you.
>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to 
> whom it is addressed and contains information that may be subject to 
> and/or may be restricted from disclosure by contract or applicable 
> law. If you are not the intended recipient of this email, be advised 
> that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the 
> sender that you have received this in error by replying to this 
> message. Then, please delete it from your system. Our Privacy Policy 
> is available here https://www.msi.com/page/privacy-policy. Thank you.



--
Ricardo Ribalda


*****CONFIDENTIAL INFORMATION*****

This email is intended only for the use of the person or entity to whom it is
addressed and contains information that may be subject to and/or may be
restricted from disclosure by contract or applicable law. If you are not the 
intended recipient of this email, be advised that any disclosure, copy, 
distribution or use of the contents of this message is strictly prohibited. 
If you are not the intended recipient of this email, please notify the sender 
that you have received this in error by replying to this message. Then, 
please delete it from your system. Our Privacy Policy is available here 
https://www.msi.com/page/privacy-policy. Thank you.

[-- Attachment #2: dmesg_20230428.log --]
[-- Type: application/octet-stream, Size: 4936 bytes --]

[10228.102415] usbcore: deregistering interface driver uvcvideo

[10228.166395] usb 1-1: Resuming interface 0

[10228.166399] usb 1-1: Resuming interface 1

[10238.516447] usb 1-1: Probing generic UVC device 1

[10238.516895] usb 1-1: Found format YUV 4:2:2 (YUYV)

[10238.516897] usb 1-1: - 640x360 (30.0 fps)

[10238.516899] usb 1-1: Found format MJPEG

[10238.516900] usb 1-1: - 1920x1080 (30.0 fps)

[10238.516901] usb 1-1: - 1280x720 (30.0 fps)

[10238.516902] usb 1-1: - 3840x1712 (30.0 fps)

[10238.516903] usb 1-1: - 2560x1136 (30.0 fps)

[10238.516904] usb 1-1: - 2560x1440 (30.0 fps)

[10238.516907] usb 1-1: Found a Status endpoint (addr 85)

[10238.516909] usb 1-1: Found UVC 1.00 device Cupola360 Camera (2245:1230)

[10238.516911] usb 1-1: Scanning UVC chain:

[10238.516912]  OT 6 <- XU 4 <- XU 3 <- PU 2 <- IT 1

[10238.516915] usb 1-1: Found a valid video chain (1 -> 6)

[10238.516918] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/2 to device 1 entity 2

[10238.519753] usb 1-1: Adding mapping 'Brightness' to control 00000000-0000-0000-0000-000000000101/2

[10238.519756] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/3 to device 1 entity 2

[10238.521738] usb 1-1: Adding mapping 'Contrast' to control 00000000-0000-0000-0000-000000000101/3

[10238.521741] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/7 to device 1 entity 2

[10238.524638] usb 1-1: Adding mapping 'Saturation' to control 00000000-0000-0000-0000-000000000101/7

[10238.524641] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/8 to device 1 entity 2

[10238.528517] usb 1-1: Adding mapping 'Sharpness' to control 00000000-0000-0000-0000-000000000101/8

[10238.528519] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/9 to device 1 entity 2

[10238.533369] usb 1-1: Adding mapping 'Gamma' to control 00000000-0000-0000-0000-000000000101/9

[10238.533373] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/10 to device 1 entity 2

[10238.537354] usb 1-1: Adding mapping 'White Balance Temperature' to control 00000000-0000-0000-0000-000000000101/10

[10238.537358] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/1 to device 1 entity 2

[10238.541310] usb 1-1: Adding mapping 'Backlight Compensation' to control 00000000-0000-0000-0000-000000000101/1

[10238.541313] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/5 to device 1 entity 2

[10238.545304] usb 1-1: Adding mapping 'Power Line Frequency' to control 00000000-0000-0000-0000-000000000101/5

[10238.545307] usb 1-1: Added control 00000000-0000-0000-0000-000000000101/11 to device 1 entity 2

[10238.549130] usb 1-1: Adding mapping 'White Balance, Automatic' to control 00000000-0000-0000-0000-000000000101/11

[10238.549134] usb 1-1: Added control 00000000-0000-0000-0000-000000000001/2 to device 1 entity 1

[10238.553029] usb 1-1: Adding mapping 'Auto Exposure' to control 00000000-0000-0000-0000-000000000001/2

[10238.553033] usb 1-1: Added control 00000000-0000-0000-0000-000000000001/3 to device 1 entity 1

[10238.555980] usb 1-1: Adding mapping 'Exposure, Dynamic Framerate' to control 00000000-0000-0000-0000-000000000001/3

[10238.555983] usb 1-1: Added control 00000000-0000-0000-0000-000000000001/4 to device 1 entity 1

[10238.558990] usb 1-1: Adding mapping 'Exposure Time, Absolute' to control 00000000-0000-0000-0000-000000000001/4

[10238.558993] usb 1-1: Added control 00000000-0000-0000-0000-000000000001/11 to device 1 entity 1

[10238.562800] usb 1-1: Adding mapping 'Zoom, Absolute' to control 00000000-0000-0000-0000-000000000001/11

[10238.562803] usb 1-1: Added control 00000000-0000-0000-0000-000000000001/13 to device 1 entity 1

[10238.565682] usb 1-1: Adding mapping 'Pan, Absolute' to control 00000000-0000-0000-0000-000000000001/13

[10238.565685] usb 1-1: Adding mapping 'Tilt, Absolute' to control 00000000-0000-0000-0000-000000000001/13

[10238.583824] input: Cupola360 Camera as /devices/pci0000:00/0000:00:0b.0/usb1/1-1/1-1:1.0/input/input9

[10238.584441] usb 1-1: uvc_v4l2_open

[10238.584466] usb 1-1: uvc_v4l2_release

[10238.585235] usb 1-1: UVC device initialized

[10238.589916] usbcore: registered new interface driver uvcvideo

[10238.634813] usb 1-1: uvc_v4l2_open

[10238.634908] usb 1-1: uvc_v4l2_release

[10238.641366] usb 1-1: uvc_v4l2_open

[10238.643786] usb 1-1: uvc_v4l2_open

[10238.643790] usb 1-1: uvc_v4l2_release

[10238.643816] usb 1-1: uvc_v4l2_open

[10238.827419] usb 1-1: uvc_v4l2_release

[10238.827463] usb 1-1: uvc_v4l2_release

[10241.066818] usb 1-1: Suspending interface 1

[10241.066822] usb 1-1: Suspending interface 0

[10246.557462] usb 1-1: uvc_v4l2_open

[10246.625260] usb 1-1: Resuming interface 0

[10246.625266] usb 1-1: Resuming interface 1

[10246.645515] usb 1-1: uvc_v4l2_release

RE: UVCIOC_CTRL_MAP not work

[hardycheng(鄭易昕)]

Hi Ricardo,

I need to sincerely apologize to you for my mistake of implanting the wrong GUID, which resulted in the device not being found. 
This was a foolish error on my part and I am sorry for taking up your valuable time.

Thank you again for your help.

Best Regards,
Hardy

-----Original Message-----
From: hardycheng(鄭易昕) 
Sent: Friday, April 28, 2023 5:10 PM
To: Ricardo Ribalda <ribalda@chromium.org>
Cc: linux-media@vger.kernel.org
Subject: RE: UVCIOC_CTRL_MAP not work

Hi Ricardo,

Seems like no more message of XU controls, I run my program in time [10246.557462], the relevant message is as follows:
[10246.557462] usb 1-1: uvc_v4l2_open
[10246.625260] usb 1-1: Resuming interface 0 [10246.625266] usb 1-1: Resuming interface 1 [10246.645515] usb 1-1: uvc_v4l2_release

Please check attachment of dmseg output `dmesg_20230428.log`


Best Regards,
Hardy#2374


-----Original Message-----
From: Ricardo Ribalda <ribalda@chromium.org>
Sent: Friday, April 28, 2023 4:58 PM
To: hardycheng(鄭易昕) <hardycheng@msi.com>
Cc: linux-media@vger.kernel.org
Subject: Re: UVCIOC_CTRL_MAP not work

What about:

rmmod uvcvideo
modprobe uvcvideo trace=0xffffffff

then run your program

You might be able to figure out what xu controls are discovered.


On Fri, 28 Apr 2023 at 10:50, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi Ricardo,
>
> Thank you for such a quick reply.
> Follow your advice, but I just got few logs in dmesg
>
> [ 9452.677337] usb 1-1: uvc_v4l2_open
> [ 9452.725254] usb 1-1: Resuming interface 0 [ 9452.725258] usb 1-1: 
> Resuming interface 1 [ 9452.751971] usb 1-1: uvc_v4l2_release [ 
> 9455.236973] usb 1-1: Suspending interface 1 [ 9455.236977] usb 1-1:
> Suspending interface 0
>
> Is there any way to get more debug message about this issue?
>
>
> Best Regards,
> Hardy#2374
>
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@chromium.org>
> Sent: Friday, April 28, 2023 4:45 PM
> To: hardycheng(鄭易昕) <hardycheng@msi.com>
> Cc: linux-media@vger.kernel.org
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> Hi Hardy
>
> try running:
>
> echo 0xffffffff > /sys/module/uvcvideo/parameters/trace
>
> and then your program
>
> and then dmesg
>
> It will tell you where it got stock
>
> Regards!
>
> On Fri, 28 Apr 2023 at 10:38, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> >
> > Hi Ricardo,
> >
> > So I modify the `uvc_xu_control_mapping` struct as follows:
> > (full code reference attachment `uvc_xu_v4l_mapping_demo.c`) struct 
> > uvc_xu_control_mapping mapping = {
> >         .id = 0x01,
> >         .name = "My Extension Unit",
> >         .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
> >         .selector = 0x01,
> >         .size = 32,
> >         .offset = 0,
> >         .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
> >         .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
> >         .menu_info = NULL,
> >         .menu_count = 0,
> >         .reserved = {0},
> > };
> >
> > And I got difference error message `UVCIOC_CTRL_MAP: No such file or 
> > directory` Please check attachment `strace_20230428_2.log` for 
> > strace output
> >
> >
> > Best Regards,
> > Hardy
> >
> >
> > -----Original Message-----
> > From: Ricardo Ribalda <ribalda@chromium.org>
> > Sent: Friday, April 28, 2023 4:26 PM
> > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > Cc: linux-media@vger.kernel.org
> > Subject: Re: UVCIOC_CTRL_MAP not work
> >
> > Hi Hardy
> >
> > Seems like you can only add mappings for  V4L2_CTRL_TYPE_INTEGER, V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON  and V4L2_CTRL_TYPE_MENU.
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/t
> > re
> > e/drivers/media/usb/uvc/uvc_v4l2.c#n130
> >
> > You are trying to add a map for a V4L2_CTRL_TYPE_STRING
> >
> > Regards
> >
> > On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > >
> > > Hi Ricardo,
> > >
> > > Thanks for reply,
> > >
> > > I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to ` 
> > > UVCIOC_CTRL_MAP` and got the same error, Please check attachment 
> > > for command output `strace -f ./uvc_xu_v4l_mapping_demo`
> > >
> > > Best Regards,
> > > Hardy
> > >
> > > -----Original Message-----
> > > From: Ricardo Ribalda <ribalda@chromium.org>
> > > Sent: Friday, April 28, 2023 4:04 PM
> > > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > > Cc: linux-media@vger.kernel.org
> > > Subject: Re: UVCIOC_CTRL_MAP not work
> > >
> > > Hi Hardy
> > >
> > > Why are you using:
> > >
> > > result = ioctl(fd, _IOWR('u', 0x20, struct 
> > > uvc_xu_control_mapping), &mapping);
> > >
> > > instead of
> > >
> > > result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
> > >
> > > Can you return the output of:
> > >
> > > strace -f  uvc_xu_v4l_mapping_demo
> > >
> > > Thanks!
> > >
> > > On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > > >
> > > > Hi,
> > > >
> > > > # Environment:
> > > >
> > > > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program 
> > > > Language = C Language
> > > >
> > > > # Overview:
> > > >
> > > > We plug in our UVC camera to PC, and try to use 
> > > > `UVCIOC_CTRL_MAP` function on PC to create the v4l2 control 
> > > > mapping, but we got error
> > > > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development 
> > > > with `C language` in `Ubuntu 22.04 LTS`
> > > >
> > > > # Description:
> > > >
> > > > We have a custom UVC camera and we can modify the extension
> > > > unit(XU) by ourself. (USB descriptions reference attachments 
> > > > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> > > >
> > > > We make sure that UVCIOC_CTRL_QUERY is work to control our XU 
> > > > item (demo code in attachment `uvc_xu_ioctl_demo.c`)
> > > >
> > > > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > > > Inappropriate ioctl for device` (demo code in attachment
> > > > `uvc_xu_v4l_mapping_demo.c`)
> > > >
> > > > # Problems:
> > > >
> > > > 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> > > > 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > > > 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
> > > >
> > > > Looking forward to your reply,
> > > > Best Regards,
> > > > Hardy#2374
> > > >
> > > > *****CONFIDENTIAL INFORMATION*****
> > > >
> > > > This email is intended only for the use of the person or entity 
> > > > to whom it is addressed and contains information that may be 
> > > > subject to and/or may be restricted from disclosure by contract 
> > > > or applicable law. If you are not the intended recipient of this 
> > > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > > If you are not the intended recipient of this email, please 
> > > > notify the sender that you have received this in error by 
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> > > > system. Our Privacy Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> > >
> > >
> > >
> > > --
> > > Ricardo Ribalda
> > >
> > >
> > > *****CONFIDENTIAL INFORMATION*****
> > >
> > > This email is intended only for the use of the person or entity to 
> > > whom it is addressed and contains information that may be subject 
> > > to and/or may be restricted from disclosure by contract or 
> > > applicable law. If you are not the intended recipient of this 
> > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > If you are not the intended recipient of this email, please notify 
> > > the sender that you have received this in error by replying to 
> > > this message. Then, please delete it from your system. Our Privacy 
> > > Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> >
> >
> >
> > --
> > Ricardo Ribalda
> >
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to 
> > whom it is addressed and contains information that may be subject to 
> > and/or may be restricted from disclosure by contract or applicable 
> > law. If you are not the intended recipient of this email, be advised 
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify 
> > the sender that you have received this in error by replying to this 
> > message. Then, please delete it from your system. Our Privacy Policy 
> > is available here https://www.msi.com/page/privacy-policy. Thank you.
>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to 
> whom it is addressed and contains information that may be subject to 
> and/or may be restricted from disclosure by contract or applicable 
> law. If you are not the intended recipient of this email, be advised 
> that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the 
> sender that you have received this in error by replying to this 
> message. Then, please delete it from your system. Our Privacy Policy 
> is available here https://www.msi.com/page/privacy-policy. Thank you.



--
Ricardo Ribalda


*****CONFIDENTIAL INFORMATION*****

This email is intended only for the use of the person or entity to whom it is
addressed and contains information that may be subject to and/or may be
restricted from disclosure by contract or applicable law. If you are not the 
intended recipient of this email, be advised that any disclosure, copy, 
distribution or use of the contents of this message is strictly prohibited. 
If you are not the intended recipient of this email, please notify the sender 
that you have received this in error by replying to this message. Then, 
please delete it from your system. Our Privacy Policy is available here 
https://www.msi.com/page/privacy-policy. Thank you.

Re: UVCIOC_CTRL_MAP not work

[Ricardo Ribalda]

Hi Hardy

On Fri, 28 Apr 2023 at 14:06, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
>
> Hi Ricardo,
>
> I need to sincerely apologize to you for my mistake of implanting the wrong GUID, which resulted in the device not being found.
> This was a foolish error on my part and I am sorry for taking up your valuable time.

Absolutely no worries, happy that it works for you now :)

Have a great weekend!

>
> Thank you again for your help.
>
> Best Regards,
> Hardy
>
> -----Original Message-----
> From: hardycheng(鄭易昕)
> Sent: Friday, April 28, 2023 5:10 PM
> To: Ricardo Ribalda <ribalda@chromium.org>
> Cc: linux-media@vger.kernel.org
> Subject: RE: UVCIOC_CTRL_MAP not work
>
> Hi Ricardo,
>
> Seems like no more message of XU controls, I run my program in time [10246.557462], the relevant message is as follows:
> [10246.557462] usb 1-1: uvc_v4l2_open
> [10246.625260] usb 1-1: Resuming interface 0 [10246.625266] usb 1-1: Resuming interface 1 [10246.645515] usb 1-1: uvc_v4l2_release
>
> Please check attachment of dmseg output `dmesg_20230428.log`
>
>
> Best Regards,
> Hardy#2374
>
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@chromium.org>
> Sent: Friday, April 28, 2023 4:58 PM
> To: hardycheng(鄭易昕) <hardycheng@msi.com>
> Cc: linux-media@vger.kernel.org
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> What about:
>
> rmmod uvcvideo
> modprobe uvcvideo trace=0xffffffff
>
> then run your program
>
> You might be able to figure out what xu controls are discovered.
>
>
> On Fri, 28 Apr 2023 at 10:50, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> >
> > Hi Ricardo,
> >
> > Thank you for such a quick reply.
> > Follow your advice, but I just got few logs in dmesg
> >
> > [ 9452.677337] usb 1-1: uvc_v4l2_open
> > [ 9452.725254] usb 1-1: Resuming interface 0 [ 9452.725258] usb 1-1:
> > Resuming interface 1 [ 9452.751971] usb 1-1: uvc_v4l2_release [
> > 9455.236973] usb 1-1: Suspending interface 1 [ 9455.236977] usb 1-1:
> > Suspending interface 0
> >
> > Is there any way to get more debug message about this issue?
> >
> >
> > Best Regards,
> > Hardy#2374
> >
> >
> > -----Original Message-----
> > From: Ricardo Ribalda <ribalda@chromium.org>
> > Sent: Friday, April 28, 2023 4:45 PM
> > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > Cc: linux-media@vger.kernel.org
> > Subject: Re: UVCIOC_CTRL_MAP not work
> >
> > Hi Hardy
> >
> > try running:
> >
> > echo 0xffffffff > /sys/module/uvcvideo/parameters/trace
> >
> > and then your program
> >
> > and then dmesg
> >
> > It will tell you where it got stock
> >
> > Regards!
> >
> > On Fri, 28 Apr 2023 at 10:38, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > >
> > > Hi Ricardo,
> > >
> > > So I modify the `uvc_xu_control_mapping` struct as follows:
> > > (full code reference attachment `uvc_xu_v4l_mapping_demo.c`) struct
> > > uvc_xu_control_mapping mapping = {
> > >         .id = 0x01,
> > >         .name = "My Extension Unit",
> > >         .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
> > >         .selector = 0x01,
> > >         .size = 32,
> > >         .offset = 0,
> > >         .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
> > >         .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
> > >         .menu_info = NULL,
> > >         .menu_count = 0,
> > >         .reserved = {0},
> > > };
> > >
> > > And I got difference error message `UVCIOC_CTRL_MAP: No such file or
> > > directory` Please check attachment `strace_20230428_2.log` for
> > > strace output
> > >
> > >
> > > Best Regards,
> > > Hardy
> > >
> > >
> > > -----Original Message-----
> > > From: Ricardo Ribalda <ribalda@chromium.org>
> > > Sent: Friday, April 28, 2023 4:26 PM
> > > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > > Cc: linux-media@vger.kernel.org
> > > Subject: Re: UVCIOC_CTRL_MAP not work
> > >
> > > Hi Hardy
> > >
> > > Seems like you can only add mappings for  V4L2_CTRL_TYPE_INTEGER, V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON  and V4L2_CTRL_TYPE_MENU.
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/t
> > > re
> > > e/drivers/media/usb/uvc/uvc_v4l2.c#n130
> > >
> > > You are trying to add a map for a V4L2_CTRL_TYPE_STRING
> > >
> > > Regards
> > >
> > > On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > > >
> > > > Hi Ricardo,
> > > >
> > > > Thanks for reply,
> > > >
> > > > I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to `
> > > > UVCIOC_CTRL_MAP` and got the same error, Please check attachment
> > > > for command output `strace -f ./uvc_xu_v4l_mapping_demo`
> > > >
> > > > Best Regards,
> > > > Hardy
> > > >
> > > > -----Original Message-----
> > > > From: Ricardo Ribalda <ribalda@chromium.org>
> > > > Sent: Friday, April 28, 2023 4:04 PM
> > > > To: hardycheng(鄭易昕) <hardycheng@msi.com>
> > > > Cc: linux-media@vger.kernel.org
> > > > Subject: Re: UVCIOC_CTRL_MAP not work
> > > >
> > > > Hi Hardy
> > > >
> > > > Why are you using:
> > > >
> > > > result = ioctl(fd, _IOWR('u', 0x20, struct
> > > > uvc_xu_control_mapping), &mapping);
> > > >
> > > > instead of
> > > >
> > > > result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
> > > >
> > > > Can you return the output of:
> > > >
> > > > strace -f  uvc_xu_v4l_mapping_demo
> > > >
> > > > Thanks!
> > > >
> > > > On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@msi.com> wrote:
> > > > >
> > > > > Hi,
> > > > >
> > > > > # Environment:
> > > > >
> > > > > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program
> > > > > Language = C Language
> > > > >
> > > > > # Overview:
> > > > >
> > > > > We plug in our UVC camera to PC, and try to use
> > > > > `UVCIOC_CTRL_MAP` function on PC to create the v4l2 control
> > > > > mapping, but we got error
> > > > > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development
> > > > > with `C language` in `Ubuntu 22.04 LTS`
> > > > >
> > > > > # Description:
> > > > >
> > > > > We have a custom UVC camera and we can modify the extension
> > > > > unit(XU) by ourself. (USB descriptions reference attachments
> > > > > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> > > > >
> > > > > We make sure that UVCIOC_CTRL_QUERY is work to control our XU
> > > > > item (demo code in attachment `uvc_xu_ioctl_demo.c`)
> > > > >
> > > > > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > > > > Inappropriate ioctl for device` (demo code in attachment
> > > > > `uvc_xu_v4l_mapping_demo.c`)
> > > > >
> > > > > # Problems:
> > > > >
> > > > > 1.      Is UVCIOC_CTRL_MAP function using in the PC host?
> > > > > 2.      Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > > > > 3.      Is there any sample code about struct `uvc_xu_control_mapping` using?
> > > > >
> > > > > Looking forward to your reply,
> > > > > Best Regards,
> > > > > Hardy#2374
> > > > >
> > > > > *****CONFIDENTIAL INFORMATION*****
> > > > >
> > > > > This email is intended only for the use of the person or entity
> > > > > to whom it is addressed and contains information that may be
> > > > > subject to and/or may be restricted from disclosure by contract
> > > > > or applicable law. If you are not the intended recipient of this
> > > > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > > > If you are not the intended recipient of this email, please
> > > > > notify the sender that you have received this in error by
> > > > > replying to this message. Then, please delete it from your
> > > > > system. Our Privacy Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> > > >
> > > >
> > > >
> > > > --
> > > > Ricardo Ribalda
> > > >
> > > >
> > > > *****CONFIDENTIAL INFORMATION*****
> > > >
> > > > This email is intended only for the use of the person or entity to
> > > > whom it is addressed and contains information that may be subject
> > > > to and/or may be restricted from disclosure by contract or
> > > > applicable law. If you are not the intended recipient of this
> > > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > > If you are not the intended recipient of this email, please notify
> > > > the sender that you have received this in error by replying to
> > > > this message. Then, please delete it from your system. Our Privacy
> > > > Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> > >
> > >
> > >
> > > --
> > > Ricardo Ribalda
> > >
> > >
> > > *****CONFIDENTIAL INFORMATION*****
> > >
> > > This email is intended only for the use of the person or entity to
> > > whom it is addressed and contains information that may be subject to
> > > and/or may be restricted from disclosure by contract or applicable
> > > law. If you are not the intended recipient of this email, be advised
> > > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
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> > > is available here https://www.msi.com/page/privacy-policy. Thank you.
> >
> >
> >
> > --
> > Ricardo Ribalda
> >
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to
> > whom it is addressed and contains information that may be subject to
> > and/or may be restricted from disclosure by contract or applicable
> > law. If you are not the intended recipient of this email, be advised
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify the
> > sender that you have received this in error by replying to this
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>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to whom it is
> addressed and contains information that may be subject to and/or may be
> restricted from disclosure by contract or applicable law. If you are not the
> intended recipient of this email, be advised that any disclosure, copy,
> distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the sender
> that you have received this in error by replying to this message. Then,
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-- 
Ricardo Ribalda