Instances of struct dma_buf_map should be useful throughout DRM's memory management code. Furthermore, several drivers can now use generic fbdev emulation. Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> --- Documentation/gpu/todo.rst | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index 3751ac976c3e..023626c1837b 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -197,8 +197,10 @@ Convert drivers to use drm_fbdev_generic_setup() ------------------------------------------------ Most drivers can use drm_fbdev_generic_setup(). Driver have to implement -atomic modesetting and GEM vmap support. Current generic fbdev emulation -expects the framebuffer in system memory (or system-like memory). +atomic modesetting and GEM vmap support. Historically, generic fbdev emulation +expected the framebuffer in system memory or system-like memory. By employing +struct dma_buf_map, drivers with frambuffers in I/O memory can be supported +as well. Contact: Maintainer of the driver you plan to convert @@ -446,6 +448,24 @@ Contact: Ville Syrjälä, Daniel Vetter Level: Intermediate +Use struct dma_buf_map throughout codebase +------------------------------------------ + +Pointers to shared device memory are stored in struct dma_buf_map. Each +instance knows whether it refers to system or I/O memory. Most of the DRM-wide +interface have been converted to use struct dma_buf_map, but implementations +often still use raw pointers. + +The task is to use struct dma_buf_map where it makes sense. + +* Memory managers should use struct dma_buf_map for dma-buf-imported buffers. +* TTM might benefit from using struct dma_buf_map internally. +* Framebuffer copying and blitting helpers should operate on struct dma_buf_map. + +Contact: Thomas Zimmermann <tzimmermann@xxxxxxx>, Christian König, Daniel Vetter + +Level: Intermediate + Core refactorings ================= -- 2.28.0
