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drm/doc: Improve docs for conn_state->best_encoder 

It's mandatory and considered core state since ioctls rely on this
working.

Thanks to Laurent for pointing out this gap.

v2: Clarify to "atomic drivers" only.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Sean Paul <sean@poorly.run>
Acked-by: Sean Paul <sean@poorly.run>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190506144629.5976-1-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2019-05-06 16:46:29 +02:00
parent 7a00b45af3
commit 27edadf6df
1 changed files with 4 additions and 0 deletions
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4
include/drm/drm_connector.h
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@ -517,6 +517,10 @@ struct drm_connector_state {
* Used by the atomic helpers to select the encoder, through the
* &drm_connector_helper_funcs.atomic_best_encoder or
* &drm_connector_helper_funcs.best_encoder callbacks.
*
* NOTE: Atomic drivers must fill this out (either themselves or through
* helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will
* not return correct data to userspace.
*/
struct drm_encoder *best_encoder;