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
