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| author |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2019-12-13 18:26:03 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2020-01-28 15:41:50 +0100 |
| commit | 9a69bd1912af86ce15a7c5dd6691518a64709ef4 (patch) | |
| tree | fd86e58b6e632c85b29e37ab9d7e062a85a01115 /Documentation/gpu/todo.rst | |
| parent | MAINTAINERS: add entry for tidss (diff) | |
| download | linux-dev-9a69bd1912af86ce15a7c5dd6691518a64709ef4.tar.xz linux-dev-9a69bd1912af86ce15a7c5dd6691518a64709ef4.zip | |
drm/todo: Add item for the plane->atomic_check confusion
It's frankly a mess, and the confusion around plane_state->crtc/fb
that I fixed up in this series is the least of the problems. Add a
todo as a future note of how this could be done a lot better, and with
a lot less driver confusion.
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191213172612.1514842-1-daniel.vetter@ffwll.ch
Diffstat (limited to 'Documentation/gpu/todo.rst')
| -rw-r--r-- | Documentation/gpu/todo.rst | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index bc869b23fc39..370ac678106e 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -72,6 +72,28 @@ Contact: Ville Syrjälä, Daniel Vetter, driver maintainers Level: Advanced +Improve plane atomic_check helpers +---------------------------------- + +Aside from the clipped coordinates right above there's a few suboptimal things +with the current helpers: + +- drm_plane_helper_funcs->atomic_check gets called for enabled or disabled + planes. At best this seems to confuse drivers, worst it means they blow up + when the plane is disabled without the CRTC. The only special handling is + resetting values in the plane state structures, which instead should be moved + into the drm_plane_funcs->atomic_duplicate_state functions. + +- Once that's done, helpers could stop calling ->atomic_check for disabled + planes. + +- Then we could go through all the drivers and remove the more-or-less confused + checks for plane_state->fb and plane_state->crtc. + +Contact: Daniel Vetter + +Level: Advanced + Convert early atomic drivers to async commit helpers ---------------------------------------------------- |