Hi Maarten, Thank you for the patches. On Monday 16 Jan 2017 10:37:37 Maarten Lankhorst wrote: > Fourth iteration. Instead of trying to convert all drivers straight away, > implement all macros that are required to get state working. > > Old situation: > Use obj->state, which can refer to old or new state. > Use drm_atomic_get_(existing_)obj_state, which can refer to new or old > state. Use for_each_obj_in_state, which refers to new or old state. > > New situation: > > During atomic check: > - Use drm_atomic_get_obj_state to add a object to the atomic state, > or get the new state. > - Use drm_atomic_get_(old/new)_obj_state to peek at the new/old state, > without adding the object. This will return NULL if the object is > not part of the state. For planes and connectors the relevant crtc_state > is added, so this will work to get the crtc_state from obj_state->crtc > too, this means not having to write some error handling. > > During atomic commit: > - Do not use drm_atomic_get_obj_state, obj->state or > drm_atomic_get_(existing_)obj_state any more, replace with > drm_atomic_get_old/new_obj_state calls as required. That will make driver code quite complicated :-/ I wonder if that's really a good solution. Maybe we should maintain obj->state only for the duration of the commit as a way to simplify drivers, and set it to NULL at all other times to avoid misusing it ? I know this contradicts the comment I've made in my review of patch 1/7, you can now choose which one to ignore :-) > During both: > - Use for_each_(new,old,oldnew)_obj_in_state to get the old or new state as > needed. oldnew will be renamed to for_each_obj_in_state after all callers > are converted to the new api. > > When not doing atomic updates: > Look at obj->state for now. I have some patches to fix this but I was asked > to make it return a const state. This breaks a lot of users though so I > skipped that patch in this iteration. > > This series will return the correct state regardless of swapping. > > Maarten Lankhorst (7): > drm/atomic: Add new iterators over all state, v3. > drm/atomic: Make add_affected_connectors look at crtc_state. > drm/atomic: Use new atomic iterator macros. > drm/atomic: Fix atomic helpers to use the new iterator macros. > drm/atomic: Add macros to access existing old/new state > drm/atomic: Convert get_existing_state callers to get_old/new_state, v2. > drm/blend: Use new atomic iterator macros. > > drivers/gpu/drm/drm_atomic.c | 39 ++-- > drivers/gpu/drm/drm_atomic_helper.c | 377 ++++++++++++++++++-------------- > drivers/gpu/drm/drm_blend.c | 23 +-- > drivers/gpu/drm/i915/intel_display.c | 13 +- > include/drm/drm_atomic.h | 180 ++++++++++++++++- > include/drm/drm_atomic_helper.h | 2 + > 6 files changed, 438 insertions(+), 196 deletions(-) -- Regards, Laurent Pinchart _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
