Currently, only damage tracking for frame damage is supported. If a driver needs to do buffer damage (e.g: the framebuffer attached to plane's state has changed since the last page-flip), the damage helpers just fallback to a full plane update. Add en entry in the TODO about implementing buffer age or any other damage accumulation algorithm for buffer damage handling. Suggested-by: Simon Ser <contact@xxxxxxxxxxx> Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx> Reviewed-by: Simon Ser <contact@xxxxxxxxxxx> Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx> --- (no changes since v1) Documentation/gpu/todo.rst | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index b62c7fa0c2bc..5c43a958814b 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -782,6 +782,26 @@ Contact: Hans de Goede Level: Advanced +Buffer age or other damage accumulation algorithm for buffer damage handling +============================================================================ + +Drivers that do per-buffer uploads, need a buffer damage handling (rather than +frame damage like drivers that do per-plane or per-CRTC uploads), but there is +no support to get the buffer age or any other damage accumulation algorithm. + +For this reason, the damage helpers just fallback to a full plane update if the +framebuffer attached to a plane has changed since the last page-flip. + +This should be improved to get damage tracking properly working on drivers that +do per-buffer uploads. + +More information about damage tracking and references to learning materials in +`Damage Tracking Properties <https://docs.kernel.org/gpu/drm-kms.html#damage-tracking-properties>`_ + +Contact: Javier Martinez Canillas <javierm@xxxxxxxxxx> + +Level: Advanced + Outside DRM =========== -- 2.41.0
