[Qemu-devel] [Bug 1827772] [NEW] [RFC] dma buf: support sprite plane

[Qemu-devel] [Bug 1827772] [NEW] [RFC] dma buf: support sprite plane

[Chen Zhang]

Public bug reported:

QEMU does not support sprite/overlay in DMA-buf mode for Intel gvt
vGPUs. Some use cases relies on sprite plane support, e.g. hw
accelerated video playback in Windows 10 guest.

To support this feature, functions in both kernel and QEMU should be
implemented:

- query support for plane info in kernel: 
  in vgpu_get_plane_info() of drm/i915/gvt/dmabuf.c, calls to intel_vgpu_decode_sprite_plane() shall be made;

- struct to hold VFIODMABuf object in QEMU:
  in struct VFIODisplay of include/hw/vfio/vfio-common.h;
- copying of data in QEMU:
  in vfio_display_get_dmabuf() of hw/vfio/display.c;
- drawing of sprite plane in QEMU:
  in vfio_display_dmabuf_update() of hw/vfio/display.c;

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: gvt mdev rfc vfio

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Title:
  [RFC] dma buf: support sprite plane

Status in QEMU:
  New

Bug description:
  QEMU does not support sprite/overlay in DMA-buf mode for Intel gvt
  vGPUs. Some use cases relies on sprite plane support, e.g. hw
  accelerated video playback in Windows 10 guest.

  To support this feature, functions in both kernel and QEMU should be
  implemented:

  - query support for plane info in kernel: 
    in vgpu_get_plane_info() of drm/i915/gvt/dmabuf.c, calls to intel_vgpu_decode_sprite_plane() shall be made;

  - struct to hold VFIODMABuf object in QEMU:
    in struct VFIODisplay of include/hw/vfio/vfio-common.h;
  - copying of data in QEMU:
    in vfio_display_get_dmabuf() of hw/vfio/display.c;
  - drawing of sprite plane in QEMU:
    in vfio_display_dmabuf_update() of hw/vfio/display.c;

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[Qemu-devel] [Bug 1827772] Re: [RFC] dma buf: support sprite plane

[Chen Zhang]

** Description changed:

  QEMU does not support sprite/overlay in DMA-buf mode for Intel gvt
  vGPUs. Some use cases relies on sprite plane support, e.g. hw
  accelerated video playback in Windows 10 guest.
  
  To support this feature, functions in both kernel and QEMU should be
  implemented:
  
- - query support for plane info in kernel: 
-   in vgpu_get_plane_info() of drm/i915/gvt/dmabuf.c, calls to intel_vgpu_decode_sprite_plane() shall be made;
+ - query support for plane info in kernel:
+   in vgpu_get_plane_info() of drm/i915/gvt/dmabuf.c, calls to intel_vgpu_decode_sprite_plane() shall be made;
  
  - struct to hold VFIODMABuf object in QEMU:
-   in struct VFIODisplay of include/hw/vfio/vfio-common.h;
+   in struct VFIODisplay of include/hw/vfio/vfio-common.h;
  - copying of data in QEMU:
-   in vfio_display_get_dmabuf() of hw/vfio/display.c;
+   in vfio_display_get_dmabuf() of hw/vfio/display.c;
  - drawing of sprite plane in QEMU:
-   in vfio_display_dmabuf_update() of hw/vfio/display.c;
+   in vfio_display_dmabuf_update() of hw/vfio/display.c;
+   defining more DisplayChangeListenerOps for overlay;
+   adding position info in struct QemuDmaBuf of include/ui/console.h;
+   adding overlay_fb in struct VirtualGfxConsole of include/ui/gtk.h;
+   implement gd_egl_overlay_dmabuf for overlay update;

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https://bugs.launchpad.net/bugs/1827772

Title:
  [RFC] dma buf: support sprite plane

Status in QEMU:
  New

Bug description:
  QEMU does not support sprite/overlay in DMA-buf mode for Intel gvt
  vGPUs. Some use cases relies on sprite plane support, e.g. hw
  accelerated video playback in Windows 10 guest.

  To support this feature, functions in both kernel and QEMU should be
  implemented:

  - query support for plane info in kernel:
    in vgpu_get_plane_info() of drm/i915/gvt/dmabuf.c, calls to intel_vgpu_decode_sprite_plane() shall be made;

  - struct to hold VFIODMABuf object in QEMU:
    in struct VFIODisplay of include/hw/vfio/vfio-common.h;
  - copying of data in QEMU:
    in vfio_display_get_dmabuf() of hw/vfio/display.c;
  - drawing of sprite plane in QEMU:
    in vfio_display_dmabuf_update() of hw/vfio/display.c;
    defining more DisplayChangeListenerOps for overlay;
    adding position info in struct QemuDmaBuf of include/ui/console.h;
    adding overlay_fb in struct VirtualGfxConsole of include/ui/gtk.h;
    implement gd_egl_overlay_dmabuf for overlay update;

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[Bug 1827772] Re: [RFC] dma buf: support sprite plane

[Thomas Huth]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/169


** Changed in: qemu
       Status: New => Expired

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #169
   https://gitlab.com/qemu-project/qemu/-/issues/169

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You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1827772

Title:
  [RFC] dma buf: support sprite plane

Status in QEMU:
  Expired

Bug description:
  QEMU does not support sprite/overlay in DMA-buf mode for Intel gvt
  vGPUs. Some use cases relies on sprite plane support, e.g. hw
  accelerated video playback in Windows 10 guest.

  To support this feature, functions in both kernel and QEMU should be
  implemented:

  - query support for plane info in kernel:
    in vgpu_get_plane_info() of drm/i915/gvt/dmabuf.c, calls to intel_vgpu_decode_sprite_plane() shall be made;

  - struct to hold VFIODMABuf object in QEMU:
    in struct VFIODisplay of include/hw/vfio/vfio-common.h;
  - copying of data in QEMU:
    in vfio_display_get_dmabuf() of hw/vfio/display.c;
  - drawing of sprite plane in QEMU:
    in vfio_display_dmabuf_update() of hw/vfio/display.c;
    defining more DisplayChangeListenerOps for overlay;
    adding position info in struct QemuDmaBuf of include/ui/console.h;
    adding overlay_fb in struct VirtualGfxConsole of include/ui/gtk.h;
    implement gd_egl_overlay_dmabuf for overlay update;

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