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drm/atomic: integrate modeset lock with private objects

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Follow the same pattern of locking as with other state objects. This
avoids boilerplate in the driver.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181022123122.30468-1-boris.brezillon@bootlin.com
This commit is contained in:
Rob Clark
2018-10-22 14:31:22 +02:00
committed by Boris Brezillon
parent cb8ce71111
commit b962a12050
9 changed files with 74 additions and 9 deletions
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37
include/drm/drm_atomic.h
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@@ -228,8 +228,30 @@ struct drm_private_state_funcs {
* Currently only tracks the state update functions and the opaque driver
* private state itself, but in the future might also track which
* &drm_modeset_lock is required to duplicate and update this object's state.
*
* All private objects must be initialized before the DRM device they are
* attached to is registered to the DRM subsystem (call to drm_dev_register())
* and should stay around until this DRM device is unregistered (call to
* drm_dev_unregister()). In other words, private objects lifetime is tied
* to the DRM device lifetime. This implies that:
*
* 1/ all calls to drm_atomic_private_obj_init() must be done before calling
* drm_dev_register()
* 2/ all calls to drm_atomic_private_obj_fini() must be done after calling
* drm_dev_unregister()
*/
struct drm_private_obj {
/**
* @head: List entry used to attach a private object to a &drm_device
* (queued to &drm_mode_config.privobj_list).
*/
struct list_head head;
/**
* @lock: Modeset lock to protect the state object.
*/
struct drm_modeset_lock lock;
/**
* @state: Current atomic state for this driver private object.
*/
@@ -244,6 +266,18 @@ struct drm_private_obj {
const struct drm_private_state_funcs *funcs;
};
/**
* drm_for_each_privobj() - private object iterator
*
* @privobj: pointer to the current private object. Updated after each
* iteration
* @dev: the DRM device we want get private objects from
*
* Allows one to iterate over all private objects attached to @dev
*/
#define drm_for_each_privobj(privobj, dev) \
list_for_each_entry(privobj, &(dev)->mode_config.privobj_list, head)
/**
* struct drm_private_state - base struct for driver private object state
* @state: backpointer to global drm_atomic_state
@@ -400,7 +434,8 @@ struct drm_connector_state * __must_check
drm_atomic_get_connector_state(struct drm_atomic_state *state,
struct drm_connector *connector);
void drm_atomic_private_obj_init(struct drm_private_obj *obj,
void drm_atomic_private_obj_init(struct drm_device *dev,
struct drm_private_obj *obj,
struct drm_private_state *state,
const struct drm_private_state_funcs *funcs);
void drm_atomic_private_obj_fini(struct drm_private_obj *obj);