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| author | Javier Martinez Canillas <javierm@redhat.com> | 2023-11-24 01:13:04 +0300 |
|---|---|---|
| committer | Javier Martinez Canillas <javierm@redhat.com> | 2023-11-24 17:15:30 +0300 |
| commit | 6c18005d8fabe8a6835fc0f96102d4269199e05b (patch) | |
| tree | 6c206a8112010750f2ced7ff73b01d96cc3f479d /Documentation/gpu | |
| parent | 017bdf8fa20175b9cccbc746122256432a599845 (diff) | |
| download | linux-6c18005d8fabe8a6835fc0f96102d4269199e05b.tar.xz | |
drm/todo: Add entry about implementing buffer age for damage tracking
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@emersion.fr>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Acked-by: Sima Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20231123221315.3579454-6-javierm@redhat.com
Diffstat (limited to 'Documentation/gpu')
| -rw-r--r-- | Documentation/gpu/todo.rst | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index b62c7fa0c2bc..503d57c75215 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -782,6 +782,29 @@ Contact: Hans de Goede Level: Advanced +Buffer age or other damage accumulation algorithm for buffer damage +=================================================================== + +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. Drivers +set &drm_plane_state.ignore_damage_clips to true as indication to +drm_atomic_helper_damage_iter_init() and drm_atomic_helper_damage_iter_next() +helpers that the damage clips should be ignored. + +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 can +be found in :ref:`damage_tracking_properties`. + +Contact: Javier Martinez Canillas <javierm@redhat.com> + +Level: Advanced + Outside DRM =========== |