v4l2loopback-dc is incompatible with Linux 6.15+ #291

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1. amfern commented on May 31, 2025

   

   amfern

   on May 31, 2025

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   this suppose to address it #292

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2. Jamim commented on May 31, 2025

   

   Jamim

   on May 31, 2025

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   Hello @amfern,

   Thanks for your effort! 🙇🏼
   Unfortunately, it looks like that PR fixes only one of missing functions.
   

   click to see all the errors

   v4l2loopback-dc.c: In function ‘buffer_written’:
   v4l2loopback-dc.c:1514:3: error: implicit declaration of function ‘del_timer_sync’ [-Wimplicit-function-declaration]
    1514 |   del_timer_sync(&dev->sustain_timer);
         |   ^~~~~~~~~~~~~~
   v4l2loopback-dc.c: At top level:
   v4l2loopback-dc.c:2347:4: error: ‘const struct v4l2_ioctl_ops’ has no member named ‘vidioc_queryctrl’; did you mean ‘vidioc_querycap’?
    2347 |   .vidioc_queryctrl         = &vidioc_queryctrl,
         |    ^~~~~~~~~~~~~~~~
         |    vidioc_querycap
   v4l2loopback-dc.c:2347:31: error: initialization of ‘int (*)(struct file *, void *, struct v4l2_dv_timings *)’ from incompatible pointer type ‘int (*)(struct fi
   le *, void *, struct v4l2_queryctrl *)’ [-Wincompatible-pointer-types]
    2347 |   .vidioc_queryctrl         = &vidioc_queryctrl,
         |                               ^
   v4l2loopback-dc.c:2347:31: note: (near initialization for ‘v4l2_loopback_ioctl_ops.vidioc_s_dv_timings’)
   v4l2loopback-dc.c:1151:1: note: ‘vidioc_queryctrl’ declared here
    1151 | vidioc_queryctrl(struct file *file, void *fh,
         | ^~~~~~~~~~~~~~~~
   v4l2loopback-dc.c:2348:4: error: ‘const struct v4l2_ioctl_ops’ has no member named ‘vidioc_g_ctrl’; did you mean ‘vidioc_g_std’?
    2348 |   .vidioc_g_ctrl            = &vidioc_g_ctrl,
         |    ^~~~~~~~~~~~~
         |    vidioc_g_std
   v4l2loopback-dc.c:2348:31: error: initialization of ‘int (*)(struct file *, void *, struct v4l2_dv_timings *)’ from incompatible pointer type ‘int (*)(struct file *, void *, struct v4l2_control *)’ [-Wincompatible-pointer-types]
    2348 |   .vidioc_g_ctrl            = &vidioc_g_ctrl,
         |                               ^
   v4l2loopback-dc.c:2348:31: note: (near initialization for ‘v4l2_loopback_ioctl_ops.vidioc_g_dv_timings’)
   v4l2loopback-dc.c:1200:1: note: ‘vidioc_g_ctrl’ declared here
    1200 | vidioc_g_ctrl(struct file *file, void *fh,
         | ^~~~~~~~~~~~~
   v4l2loopback-dc.c:2349:4: error: ‘const struct v4l2_ioctl_ops’ has no member named ‘vidioc_s_ctrl’; did you mean ‘vidioc_s_std’?
    2349 |   .vidioc_s_ctrl            = &vidioc_s_ctrl,
         |    ^~~~~~~~~~~~~
         |    vidioc_s_std
   v4l2loopback-dc.c:2349:31: error: initialization of ‘int (*)(struct file *, void *, struct v4l2_dv_timings *)’ from incompatible pointer type ‘int (*)(struct file *, void *, struct v4l2_control *)’ [-Wincompatible-pointer-types]
    2349 |   .vidioc_s_ctrl            = &vidioc_s_ctrl,
         |                               ^
   v4l2loopback-dc.c:2349:31: note: (near initialization for ‘v4l2_loopback_ioctl_ops.vidioc_query_dv_timings’)
   v4l2loopback-dc.c:1227:1: note: ‘vidioc_s_ctrl’ declared here
    1227 | vidioc_s_ctrl(struct file *file, void *fh,
         | ^~~~~~~~~~~~~
3. amfern commented on May 31, 2025

   

   amfern

   on May 31, 2025

   Last edited by amfern

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   Hi @Jamim

   I updated the PR and tested that the driver works on arch distro, can you check again?

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4. Jamim commented on Jun 1, 2025

   

   Jamim

   on Jun 1, 2025

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   Hi @Jamim

   I updated the PR and tested that the driver works on test distro, can you check again?

   Now it builds and works fine on Linux 6.15 🎉
   Thank you, @amfern!

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5. aramg

   closed this as completedon Jun 19, 2025