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drm/atomic: Fix remaining places where !funcs->best_encoder is valid

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Adapt drm_pick_crtcs() and update_connector_routing() to fallback to
drm_atomic_helper_best_encoder() if funcs->best_encoder() is NULL so
that DRM drivers can leave this hook unassigned if they know they want
to use drm_atomic_helper_best_encoder().

Update the vtables documentation accordingly.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465300095-16971-2-git-send-email-boris.brezillon@free-electrons.com
This commit is contained in:
Boris Brezillon 2016-06-07 13:47:56 +02:00 committed by Daniel Vetter
parent 7ea7728387
commit c61b93fe51
3 changed files with 23 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/drm_atomic_helper.c
View File

@ -300,8 +300,10 @@ update_connector_routing(struct drm_atomic_state *state,
if (funcs->atomic_best_encoder)
new_encoder = funcs->atomic_best_encoder(connector,
connector_state);
else
else if (funcs->best_encoder)
new_encoder = funcs->best_encoder(connector);
else
new_encoder = drm_atomic_helper_best_encoder(connector);
if (!new_encoder) {
DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n",

13
drivers/gpu/drm/drm_fb_helper.c
View File

@ -1971,7 +1971,18 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
my_score++;
connector_funcs = connector->helper_private;
encoder = connector_funcs->best_encoder(connector);
/*
* If the DRM device implements atomic hooks and ->best_encoder() is
* NULL we fallback to the default drm_atomic_helper_best_encoder()
* helper.
*/
if (fb_helper->dev->mode_config.funcs->atomic_commit &&
!connector_funcs->best_encoder)
encoder = drm_atomic_helper_best_encoder(connector);
else
encoder = connector_funcs->best_encoder(connector);
if (!encoder)
goto out;

10
include/drm/drm_modeset_helper_vtables.h
View File

@ -736,6 +736,11 @@ struct drm_connector_helper_funcs {
* inspect dynamic configuration state should instead use
* @atomic_best_encoder.
*
* You can leave this function to NULL if the connector is only
* attached to a single encoder and you are using the atomic helpers.
* In this case, the core will call drm_atomic_helper_best_encoder()
* for you.
*
* RETURNS:
*
* Encoder that should be used for the given connector and connector
@ -752,8 +757,9 @@ struct drm_connector_helper_funcs {
* need to select the best encoder depending upon the desired
* configuration and can't select it statically.
*
* This function is used by drm_atomic_helper_check_modeset() and either
* this or @best_encoder is required.
* This function is used by drm_atomic_helper_check_modeset().
* If it is not implemented, the core will fallback to @best_encoder
* (or drm_atomic_helper_best_encoder() if @best_encoder is NULL).
*
* NOTE:
*