[PATCH 0/4] vkms: Switch to shadow-buffered plane state

[Sumera Priyadarsini]

On Mon, Jul 5, 2021 at 1:16 PM Thomas Zimmermann <tzimmermann at suse.de> wrote:
>
> Vkms copies each plane's framebuffer into the output buffer; essentially
> using a shadow buffer. DRM provides struct drm_shadow_plane_state, which
> handles the details of mapping/unmapping shadow buffers into memory for
> active planes.
>
> Convert vkms to the helpers. Makes vkms use shared code and gives more
> test exposure to shadow-plane helpers.
>
> Thomas Zimmermann (4):
>   drm/gem: Export implementation of shadow-plane helpers
>   drm/vkms: Inherit plane state from struct drm_shadow_plane_state
>   drm/vkms: Let shadow-plane helpers prepare the plane's FB
>   drm/vkms: Use dma-buf mapping from shadow-plane state for composing
>
>  drivers/gpu/drm/drm_gem_atomic_helper.c | 55 ++++++++++++++++++++++--
>  drivers/gpu/drm/vkms/vkms_composer.c    | 26 ++++++-----
>  drivers/gpu/drm/vkms/vkms_drv.h         |  6 ++-
>  drivers/gpu/drm/vkms/vkms_plane.c       | 57 ++++++-------------------
>  include/drm/drm_gem_atomic_helper.h     |  6 +++
>  5 files changed, 86 insertions(+), 64 deletions(-)
>
>
> base-commit: 3d3b5479895dd6dd133571ded4318adf595708ba
> --
> 2.32.0
>
Hi,

Thanks for the patches. The switch to shadow-plane helpers also solved
a bug that was causing a kernel
panic during some IGT kms_flip subtests on the vkms virtual hw patch.

Tested-by: Sumera Priyadarsini <sylphrenadin at gmail.com>

Cheers,
Sumera