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drm/atomic: document how to handle driver private objects

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DK put some nice docs into the commit introducing driver private
state, but in the git history alone it'll be lost.

Also, since Ville remove the void* usage it's a good opportunity to
give the driver private stuff some tlc on the doc front.

Finally try to explain why the "let's just subclass drm_atomic_state"
approach wasn't the greatest, and annotate all those functions as
deprecated in favour of more standardized driver private states. Also
note where we could/should extend driver private states going forward
(atm neither locking nor synchronization is handled in core/helpers,
which isn't really all that great).

v2: Spelling and phrasing improvements (Alex, DK).

Cc: Harry Wentland <[email protected]>
Cc: Dhinakaran Pandiyan <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Cc: Laurent Pinchart <[email protected]>
Cc: Rob Clark <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: Ben Skeggs <[email protected]>
Reviewed-by: Dhinakaran Pandiyan <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
This commit is contained in:
Daniel Vetter 2017-12-14 21:30:53 +01:00
commit da6c059697
4 changed files with 85 additions and 3 deletions
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6
Documentation/gpu/drm-kms.rst
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@ -271,6 +271,12 @@ Taken all together there's two consequences for the atomic design:
Read on in this chapter, and also in :ref:`drm_atomic_helper` for more detailed
coverage of specific topics.
Handling Driver Private State
-----------------------------
.. kernel-doc:: drivers/gpu/drm/drm_atomic.c
:doc: handling driver private state
Atomic Mode Setting Function Reference
--------------------------------------