[PATCH 00/13] drm/amdgpu: Add virtual display feature.

[Alex Deucher]

Adding dri-devel.

This patch set basically adds a driver option to enable virtual
display hw if the user needs it (e.g., virtualization environments,
headless cards, pre-silicon environments, etc.).  It looks like a
regular KMS crtc/encoder/connector and works with existing userspace
unchanged.

Alex

On Thu, Aug 4, 2016 at 3:04 AM, Emily Deng <Emily.Deng at amd.com> wrote:
> The Virtual Display feature is to fake a display engine in amdgpu kernel driver, which allows any other kernel modules or user mode components to work as expected even without real display HW. User can get the desktop/primary surface through remote desktop tools instead of displaying HW associated with the GPU.
> The virtual display feature is designed for following cases:
> 1)Headless GPU, which has no display engine, while for some reason the X server is required to initialize in this GPU;
> 2)GPU with head (display engine) but Video BIOS disables display capability for some reason. For example, SR-IOV virtualization enabled Video BIOS often disables display connector. Some S-series Pro-Graphics designed for headless computer also disable display capability in Video BIOS;
> 3)For whatever reason, end user wants to enable a virtual display (don’t need HW display capability).
>
> Emily Deng (13):
>   drm/amdgpu: Add virtual connector and encoder macros.
>   drm/amdgpu: Initialize dce_virtual_ip_funcs
>   drm/amdgpu: Initialize dce_virtual_display_funcs.
>   drm/amdgpu: Initialize crtc, pageflip irq funcs
>   drm/amdgpu: Initialize dce_virtual_crtc_helper_funcs
>   drm/amdgpu: Initialize dce_virtual_crtc_funcs.
>   drm/amdgpu: Disable VGA render and crtc when init GMC.
>   drm/amdgpu: Use software timer to generate vsync interrupt.
>   drm/amdgpu: Call pageflip irq funtion when receiced vsync interrupt.
>   drm/amdgpu: Add DRM_MODE_CONNECTOR_VIRTUAL connector in
>     amdgpu_connector_add.
>   drm/amdgpu: Define vitual display ip blocks.
>   drm/amdgpu: Define one variable for virtual display.
>   drm/amdgpu: Set ip_blocks according variable amdgpu_virtual_display.
>
>  drivers/gpu/drm/amd/amdgpu/Makefile            |   3 +-
>  drivers/gpu/drm/amd/amdgpu/ObjectID.h          |   7 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu.h            |   3 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c   |  27 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h   |   2 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c |  95 +++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c     |   5 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_display.c    |   5 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c        |   4 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h       |   9 +-
>  drivers/gpu/drm/amd/amdgpu/cik.c               | 445 +++++++++++--
>  drivers/gpu/drm/amd/amdgpu/dce_v10_0.c         |  75 +++
>  drivers/gpu/drm/amd/amdgpu/dce_v10_0.h         |   2 +
>  drivers/gpu/drm/amd/amdgpu/dce_v11_0.c         |  83 +++
>  drivers/gpu/drm/amd/amdgpu/dce_v11_0.h         |   2 +
>  drivers/gpu/drm/amd/amdgpu/dce_v8_0.c          |  82 +++
>  drivers/gpu/drm/amd/amdgpu/dce_v8_0.h          |   2 +
>  drivers/gpu/drm/amd/amdgpu/dce_virtual.c       | 855 +++++++++++++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/dce_virtual.h       |  31 +
>  drivers/gpu/drm/amd/amdgpu/vi.c                | 416 ++++++++++--
>  20 files changed, 2062 insertions(+), 91 deletions(-)
>  create mode 100644 drivers/gpu/drm/amd/amdgpu/dce_virtual.c
>  create mode 100644 drivers/gpu/drm/amd/amdgpu/dce_virtual.h
>
> --
> 1.9.1
>
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