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OpenCloudOS-Kernel/Documentation/gpu/drm-client.rst

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drm: Begin an API for in-kernel clients This the beginning of an API for in-kernel clients. First out is a way to get a framebuffer backed by a dumb buffer. Only GEM drivers are supported. The original idea of using an exported dma-buf was dropped because it also creates an anonomous file descriptor which doesn't work when the buffer is created from a kernel thread. The easy way out is to use drm_driver.gem_prime_vmap to get the virtual address, which requires a GEM object. This excludes the vmwgfx driver which is the only non-GEM driver apart from the legacy ones. A solution for vmwgfx will have to be worked out later if it wants to support the client API which it probably will when we have a bootsplash client. Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20180703160354.59955-2-noralf@tronnes.org
2018-07-04 00:03:47 +08:00
=================
Kernel clients
=================
.. kernel-doc:: drivers/gpu/drm/drm_client.c
:doc: overview
.. kernel-doc:: include/drm/drm_client.h
:internal:
.. kernel-doc:: drivers/gpu/drm/drm_client.c
:export: