[PATCH 0/3] drm/amdgpu: modernize virtual display feature

[Alex Deucher]

On Tue, Jul 27, 2021 at 8:11 PM Ryan Taylor <Ryan.Taylor at amd.com> wrote:
>
> The amdgpu vkms interface provides a virtual KMS interface for several use
> cases: devices without display hardware, platforms where the actual display
> hardware is not useful (e.g., servers), SR-IOV virtual functions, device
> emulation/simulation, and device bring up prior to display hardware being
> usable. We previously emulated a legacy KMS interface, but there was a desire
> to move to the atomic KMS interface. The vkms driver did everything we
> needed, but we wanted KMS support natively in the driver without buffer
> sharing and the ability to support an instance of VKMS per device. We first
> looked at splitting vkms into a stub driver and a helper module that other
> drivers could use to implement a virtual display, but this strategy ended up
> being messy due to driver specific callbacks needed for buffer management.
> Ultimately, it proved easier to import the vkms code as it mostly used core
> drm helpers anyway.

Series is:
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

>
> Ryan Taylor (3):
>   drm/amdgpu: create amdgpu_vkms (v4)
>   drm/amdgpu: cleanup dce_virtual
>   drm/amdgpu: replace dce_virtual with amdgpu_vkms (v3)
>
>  drivers/gpu/drm/amd/amdgpu/Makefile      |   2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu.h      |   1 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c  |   2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c   |   2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c | 641 +++++++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.h |  26 +
>  drivers/gpu/drm/amd/amdgpu/cik.c         |  10 +-
>  drivers/gpu/drm/amd/amdgpu/dce_virtual.c | 780 -----------------------
>  drivers/gpu/drm/amd/amdgpu/dce_virtual.h |  30 -
>  drivers/gpu/drm/amd/amdgpu/nv.c          |  22 +-
>  drivers/gpu/drm/amd/amdgpu/si.c          |   8 +-
>  drivers/gpu/drm/amd/amdgpu/soc15.c       |  10 +-
>  drivers/gpu/drm/amd/amdgpu/vi.c          |  14 +-
>  13 files changed, 703 insertions(+), 845 deletions(-)
>  create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c
>  create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.h
>  delete mode 100644 drivers/gpu/drm/amd/amdgpu/dce_virtual.c
>  delete mode 100644 drivers/gpu/drm/amd/amdgpu/dce_virtual.h
>
>
> base-commit: e0186426a7efeb506164da7d4a56cfdaea38b380
> --
> 2.32.0
>
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