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.
Signed-off-by: Daniel Vetter daniel.vetter@intel.com --- Documentation/gpu/todo.rst | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index 2d85f37284a1..63b657ecc9ce 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 ----------------------------------------------------