forked from Minki/linux
91ea83306b
Commit751465913f
("drm/bridge: Add a drm_bridge_state object") introduced new helpers and hooks but the kernel was slightly broken. Fix that now. v2: * Fix the drm_atomic_add_encoder_bridges() doc Fixes:751465913f
("drm/bridge: Add a drm_bridge_state object") Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200218151503.595825-1-boris.brezillon@collabora.com
1072 lines
38 KiB
C
1072 lines
38 KiB
C
/*
|
|
* Copyright (C) 2014 Red Hat
|
|
* Copyright (C) 2014 Intel Corp.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Authors:
|
|
* Rob Clark <robdclark@gmail.com>
|
|
* Daniel Vetter <daniel.vetter@ffwll.ch>
|
|
*/
|
|
|
|
#ifndef DRM_ATOMIC_H_
|
|
#define DRM_ATOMIC_H_
|
|
|
|
#include <drm/drm_crtc.h>
|
|
#include <drm/drm_util.h>
|
|
|
|
/**
|
|
* struct drm_crtc_commit - track modeset commits on a CRTC
|
|
*
|
|
* This structure is used to track pending modeset changes and atomic commit on
|
|
* a per-CRTC basis. Since updating the list should never block, this structure
|
|
* is reference counted to allow waiters to safely wait on an event to complete,
|
|
* without holding any locks.
|
|
*
|
|
* It has 3 different events in total to allow a fine-grained synchronization
|
|
* between outstanding updates::
|
|
*
|
|
* atomic commit thread hardware
|
|
*
|
|
* write new state into hardware ----> ...
|
|
* signal hw_done
|
|
* switch to new state on next
|
|
* ... v/hblank
|
|
*
|
|
* wait for buffers to show up ...
|
|
*
|
|
* ... send completion irq
|
|
* irq handler signals flip_done
|
|
* cleanup old buffers
|
|
*
|
|
* signal cleanup_done
|
|
*
|
|
* wait for flip_done <----
|
|
* clean up atomic state
|
|
*
|
|
* The important bit to know is that &cleanup_done is the terminal event, but the
|
|
* ordering between &flip_done and &hw_done is entirely up to the specific driver
|
|
* and modeset state change.
|
|
*
|
|
* For an implementation of how to use this look at
|
|
* drm_atomic_helper_setup_commit() from the atomic helper library.
|
|
*/
|
|
struct drm_crtc_commit {
|
|
/**
|
|
* @crtc:
|
|
*
|
|
* DRM CRTC for this commit.
|
|
*/
|
|
struct drm_crtc *crtc;
|
|
|
|
/**
|
|
* @ref:
|
|
*
|
|
* Reference count for this structure. Needed to allow blocking on
|
|
* completions without the risk of the completion disappearing
|
|
* meanwhile.
|
|
*/
|
|
struct kref ref;
|
|
|
|
/**
|
|
* @flip_done:
|
|
*
|
|
* Will be signaled when the hardware has flipped to the new set of
|
|
* buffers. Signals at the same time as when the drm event for this
|
|
* commit is sent to userspace, or when an out-fence is singalled. Note
|
|
* that for most hardware, in most cases this happens after @hw_done is
|
|
* signalled.
|
|
*
|
|
* Completion of this stage is signalled implicitly by calling
|
|
* drm_crtc_send_vblank_event() on &drm_crtc_state.event.
|
|
*/
|
|
struct completion flip_done;
|
|
|
|
/**
|
|
* @hw_done:
|
|
*
|
|
* Will be signalled when all hw register changes for this commit have
|
|
* been written out. Especially when disabling a pipe this can be much
|
|
* later than than @flip_done, since that can signal already when the
|
|
* screen goes black, whereas to fully shut down a pipe more register
|
|
* I/O is required.
|
|
*
|
|
* Note that this does not need to include separately reference-counted
|
|
* resources like backing storage buffer pinning, or runtime pm
|
|
* management.
|
|
*
|
|
* Drivers should call drm_atomic_helper_commit_hw_done() to signal
|
|
* completion of this stage.
|
|
*/
|
|
struct completion hw_done;
|
|
|
|
/**
|
|
* @cleanup_done:
|
|
*
|
|
* Will be signalled after old buffers have been cleaned up by calling
|
|
* drm_atomic_helper_cleanup_planes(). Since this can only happen after
|
|
* a vblank wait completed it might be a bit later. This completion is
|
|
* useful to throttle updates and avoid hardware updates getting ahead
|
|
* of the buffer cleanup too much.
|
|
*
|
|
* Drivers should call drm_atomic_helper_commit_cleanup_done() to signal
|
|
* completion of this stage.
|
|
*/
|
|
struct completion cleanup_done;
|
|
|
|
/**
|
|
* @commit_entry:
|
|
*
|
|
* Entry on the per-CRTC &drm_crtc.commit_list. Protected by
|
|
* $drm_crtc.commit_lock.
|
|
*/
|
|
struct list_head commit_entry;
|
|
|
|
/**
|
|
* @event:
|
|
*
|
|
* &drm_pending_vblank_event pointer to clean up private events.
|
|
*/
|
|
struct drm_pending_vblank_event *event;
|
|
|
|
/**
|
|
* @abort_completion:
|
|
*
|
|
* A flag that's set after drm_atomic_helper_setup_commit() takes a
|
|
* second reference for the completion of $drm_crtc_state.event. It's
|
|
* used by the free code to remove the second reference if commit fails.
|
|
*/
|
|
bool abort_completion;
|
|
};
|
|
|
|
struct __drm_planes_state {
|
|
struct drm_plane *ptr;
|
|
struct drm_plane_state *state, *old_state, *new_state;
|
|
};
|
|
|
|
struct __drm_crtcs_state {
|
|
struct drm_crtc *ptr;
|
|
struct drm_crtc_state *state, *old_state, *new_state;
|
|
|
|
/**
|
|
* @commit:
|
|
*
|
|
* A reference to the CRTC commit object that is kept for use by
|
|
* drm_atomic_helper_wait_for_flip_done() after
|
|
* drm_atomic_helper_commit_hw_done() is called. This ensures that a
|
|
* concurrent commit won't free a commit object that is still in use.
|
|
*/
|
|
struct drm_crtc_commit *commit;
|
|
|
|
s32 __user *out_fence_ptr;
|
|
u64 last_vblank_count;
|
|
};
|
|
|
|
struct __drm_connnectors_state {
|
|
struct drm_connector *ptr;
|
|
struct drm_connector_state *state, *old_state, *new_state;
|
|
/**
|
|
* @out_fence_ptr:
|
|
*
|
|
* User-provided pointer which the kernel uses to return a sync_file
|
|
* file descriptor. Used by writeback connectors to signal completion of
|
|
* the writeback.
|
|
*/
|
|
s32 __user *out_fence_ptr;
|
|
};
|
|
|
|
struct drm_private_obj;
|
|
struct drm_private_state;
|
|
|
|
/**
|
|
* struct drm_private_state_funcs - atomic state functions for private objects
|
|
*
|
|
* These hooks are used by atomic helpers to create, swap and destroy states of
|
|
* private objects. The structure itself is used as a vtable to identify the
|
|
* associated private object type. Each private object type that needs to be
|
|
* added to the atomic states is expected to have an implementation of these
|
|
* hooks and pass a pointer to its drm_private_state_funcs struct to
|
|
* drm_atomic_get_private_obj_state().
|
|
*/
|
|
struct drm_private_state_funcs {
|
|
/**
|
|
* @atomic_duplicate_state:
|
|
*
|
|
* Duplicate the current state of the private object and return it. It
|
|
* is an error to call this before obj->state has been initialized.
|
|
*
|
|
* RETURNS:
|
|
*
|
|
* Duplicated atomic state or NULL when obj->state is not
|
|
* initialized or allocation failed.
|
|
*/
|
|
struct drm_private_state *(*atomic_duplicate_state)(struct drm_private_obj *obj);
|
|
|
|
/**
|
|
* @atomic_destroy_state:
|
|
*
|
|
* Frees the private object state created with @atomic_duplicate_state.
|
|
*/
|
|
void (*atomic_destroy_state)(struct drm_private_obj *obj,
|
|
struct drm_private_state *state);
|
|
};
|
|
|
|
/**
|
|
* struct drm_private_obj - base struct for driver private atomic object
|
|
*
|
|
* A driver private object is initialized by calling
|
|
* drm_atomic_private_obj_init() and cleaned up by calling
|
|
* drm_atomic_private_obj_fini().
|
|
*
|
|
* 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.
|
|
*/
|
|
struct drm_private_state *state;
|
|
|
|
/**
|
|
* @funcs:
|
|
*
|
|
* Functions to manipulate the state of this driver private object, see
|
|
* &drm_private_state_funcs.
|
|
*/
|
|
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
|
|
*
|
|
* Currently only contains a backpointer to the overall atomic update, but in
|
|
* the future also might hold synchronization information similar to e.g.
|
|
* &drm_crtc.commit.
|
|
*/
|
|
struct drm_private_state {
|
|
struct drm_atomic_state *state;
|
|
};
|
|
|
|
struct __drm_private_objs_state {
|
|
struct drm_private_obj *ptr;
|
|
struct drm_private_state *state, *old_state, *new_state;
|
|
};
|
|
|
|
/**
|
|
* struct drm_atomic_state - the global state object for atomic updates
|
|
* @ref: count of all references to this state (will not be freed until zero)
|
|
* @dev: parent DRM device
|
|
* @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
|
|
* @async_update: hint for asynchronous plane update
|
|
* @planes: pointer to array of structures with per-plane data
|
|
* @crtcs: pointer to array of CRTC pointers
|
|
* @num_connector: size of the @connectors and @connector_states arrays
|
|
* @connectors: pointer to array of structures with per-connector data
|
|
* @num_private_objs: size of the @private_objs array
|
|
* @private_objs: pointer to array of private object pointers
|
|
* @acquire_ctx: acquire context for this atomic modeset state update
|
|
*
|
|
* States are added to an atomic update by calling drm_atomic_get_crtc_state(),
|
|
* drm_atomic_get_plane_state(), drm_atomic_get_connector_state(), or for
|
|
* private state structures, drm_atomic_get_private_obj_state().
|
|
*/
|
|
struct drm_atomic_state {
|
|
struct kref ref;
|
|
|
|
struct drm_device *dev;
|
|
|
|
/**
|
|
* @allow_modeset:
|
|
*
|
|
* Allow full modeset. This is used by the ATOMIC IOCTL handler to
|
|
* implement the DRM_MODE_ATOMIC_ALLOW_MODESET flag. Drivers should
|
|
* never consult this flag, instead looking at the output of
|
|
* drm_atomic_crtc_needs_modeset().
|
|
*/
|
|
bool allow_modeset : 1;
|
|
bool legacy_cursor_update : 1;
|
|
bool async_update : 1;
|
|
/**
|
|
* @duplicated:
|
|
*
|
|
* Indicates whether or not this atomic state was duplicated using
|
|
* drm_atomic_helper_duplicate_state(). Drivers and atomic helpers
|
|
* should use this to fixup normal inconsistencies in duplicated
|
|
* states.
|
|
*/
|
|
bool duplicated : 1;
|
|
struct __drm_planes_state *planes;
|
|
struct __drm_crtcs_state *crtcs;
|
|
int num_connector;
|
|
struct __drm_connnectors_state *connectors;
|
|
int num_private_objs;
|
|
struct __drm_private_objs_state *private_objs;
|
|
|
|
struct drm_modeset_acquire_ctx *acquire_ctx;
|
|
|
|
/**
|
|
* @fake_commit:
|
|
*
|
|
* Used for signaling unbound planes/connectors.
|
|
* When a connector or plane is not bound to any CRTC, it's still important
|
|
* to preserve linearity to prevent the atomic states from being freed to early.
|
|
*
|
|
* This commit (if set) is not bound to any CRTC, but will be completed when
|
|
* drm_atomic_helper_commit_hw_done() is called.
|
|
*/
|
|
struct drm_crtc_commit *fake_commit;
|
|
|
|
/**
|
|
* @commit_work:
|
|
*
|
|
* Work item which can be used by the driver or helpers to execute the
|
|
* commit without blocking.
|
|
*/
|
|
struct work_struct commit_work;
|
|
};
|
|
|
|
void __drm_crtc_commit_free(struct kref *kref);
|
|
|
|
/**
|
|
* drm_crtc_commit_get - acquire a reference to the CRTC commit
|
|
* @commit: CRTC commit
|
|
*
|
|
* Increases the reference of @commit.
|
|
*
|
|
* Returns:
|
|
* The pointer to @commit, with reference increased.
|
|
*/
|
|
static inline struct drm_crtc_commit *drm_crtc_commit_get(struct drm_crtc_commit *commit)
|
|
{
|
|
kref_get(&commit->ref);
|
|
return commit;
|
|
}
|
|
|
|
/**
|
|
* drm_crtc_commit_put - release a reference to the CRTC commmit
|
|
* @commit: CRTC commit
|
|
*
|
|
* This releases a reference to @commit which is freed after removing the
|
|
* final reference. No locking required and callable from any context.
|
|
*/
|
|
static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit)
|
|
{
|
|
kref_put(&commit->ref, __drm_crtc_commit_free);
|
|
}
|
|
|
|
struct drm_atomic_state * __must_check
|
|
drm_atomic_state_alloc(struct drm_device *dev);
|
|
void drm_atomic_state_clear(struct drm_atomic_state *state);
|
|
|
|
/**
|
|
* drm_atomic_state_get - acquire a reference to the atomic state
|
|
* @state: The atomic state
|
|
*
|
|
* Returns a new reference to the @state
|
|
*/
|
|
static inline struct drm_atomic_state *
|
|
drm_atomic_state_get(struct drm_atomic_state *state)
|
|
{
|
|
kref_get(&state->ref);
|
|
return state;
|
|
}
|
|
|
|
void __drm_atomic_state_free(struct kref *ref);
|
|
|
|
/**
|
|
* drm_atomic_state_put - release a reference to the atomic state
|
|
* @state: The atomic state
|
|
*
|
|
* This releases a reference to @state which is freed after removing the
|
|
* final reference. No locking required and callable from any context.
|
|
*/
|
|
static inline void drm_atomic_state_put(struct drm_atomic_state *state)
|
|
{
|
|
kref_put(&state->ref, __drm_atomic_state_free);
|
|
}
|
|
|
|
int __must_check
|
|
drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state);
|
|
void drm_atomic_state_default_clear(struct drm_atomic_state *state);
|
|
void drm_atomic_state_default_release(struct drm_atomic_state *state);
|
|
|
|
struct drm_crtc_state * __must_check
|
|
drm_atomic_get_crtc_state(struct drm_atomic_state *state,
|
|
struct drm_crtc *crtc);
|
|
struct drm_plane_state * __must_check
|
|
drm_atomic_get_plane_state(struct drm_atomic_state *state,
|
|
struct drm_plane *plane);
|
|
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_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);
|
|
|
|
struct drm_private_state * __must_check
|
|
drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj);
|
|
struct drm_private_state *
|
|
drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj);
|
|
struct drm_private_state *
|
|
drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj);
|
|
|
|
struct drm_connector *
|
|
drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
|
|
struct drm_encoder *encoder);
|
|
struct drm_connector *
|
|
drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
|
|
struct drm_encoder *encoder);
|
|
|
|
/**
|
|
* drm_atomic_get_existing_crtc_state - get CRTC state, if it exists
|
|
* @state: global atomic state object
|
|
* @crtc: CRTC to grab
|
|
*
|
|
* This function returns the CRTC state for the given CRTC, or NULL
|
|
* if the CRTC is not part of the global atomic state.
|
|
*
|
|
* This function is deprecated, @drm_atomic_get_old_crtc_state or
|
|
* @drm_atomic_get_new_crtc_state should be used instead.
|
|
*/
|
|
static inline struct drm_crtc_state *
|
|
drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
return state->crtcs[drm_crtc_index(crtc)].state;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_old_crtc_state - get old CRTC state, if it exists
|
|
* @state: global atomic state object
|
|
* @crtc: CRTC to grab
|
|
*
|
|
* This function returns the old CRTC state for the given CRTC, or
|
|
* NULL if the CRTC is not part of the global atomic state.
|
|
*/
|
|
static inline struct drm_crtc_state *
|
|
drm_atomic_get_old_crtc_state(struct drm_atomic_state *state,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
return state->crtcs[drm_crtc_index(crtc)].old_state;
|
|
}
|
|
/**
|
|
* drm_atomic_get_new_crtc_state - get new CRTC state, if it exists
|
|
* @state: global atomic state object
|
|
* @crtc: CRTC to grab
|
|
*
|
|
* This function returns the new CRTC state for the given CRTC, or
|
|
* NULL if the CRTC is not part of the global atomic state.
|
|
*/
|
|
static inline struct drm_crtc_state *
|
|
drm_atomic_get_new_crtc_state(struct drm_atomic_state *state,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
return state->crtcs[drm_crtc_index(crtc)].new_state;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_existing_plane_state - get plane state, if it exists
|
|
* @state: global atomic state object
|
|
* @plane: plane to grab
|
|
*
|
|
* This function returns the plane state for the given plane, or NULL
|
|
* if the plane is not part of the global atomic state.
|
|
*
|
|
* This function is deprecated, @drm_atomic_get_old_plane_state or
|
|
* @drm_atomic_get_new_plane_state should be used instead.
|
|
*/
|
|
static inline struct drm_plane_state *
|
|
drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
|
|
struct drm_plane *plane)
|
|
{
|
|
return state->planes[drm_plane_index(plane)].state;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_old_plane_state - get plane state, if it exists
|
|
* @state: global atomic state object
|
|
* @plane: plane to grab
|
|
*
|
|
* This function returns the old plane state for the given plane, or
|
|
* NULL if the plane is not part of the global atomic state.
|
|
*/
|
|
static inline struct drm_plane_state *
|
|
drm_atomic_get_old_plane_state(struct drm_atomic_state *state,
|
|
struct drm_plane *plane)
|
|
{
|
|
return state->planes[drm_plane_index(plane)].old_state;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_new_plane_state - get plane state, if it exists
|
|
* @state: global atomic state object
|
|
* @plane: plane to grab
|
|
*
|
|
* This function returns the new plane state for the given plane, or
|
|
* NULL if the plane is not part of the global atomic state.
|
|
*/
|
|
static inline struct drm_plane_state *
|
|
drm_atomic_get_new_plane_state(struct drm_atomic_state *state,
|
|
struct drm_plane *plane)
|
|
{
|
|
return state->planes[drm_plane_index(plane)].new_state;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_existing_connector_state - get connector state, if it exists
|
|
* @state: global atomic state object
|
|
* @connector: connector to grab
|
|
*
|
|
* This function returns the connector state for the given connector,
|
|
* or NULL if the connector is not part of the global atomic state.
|
|
*
|
|
* This function is deprecated, @drm_atomic_get_old_connector_state or
|
|
* @drm_atomic_get_new_connector_state should be used instead.
|
|
*/
|
|
static inline struct drm_connector_state *
|
|
drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
|
|
struct drm_connector *connector)
|
|
{
|
|
int index = drm_connector_index(connector);
|
|
|
|
if (index >= state->num_connector)
|
|
return NULL;
|
|
|
|
return state->connectors[index].state;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_old_connector_state - get connector state, if it exists
|
|
* @state: global atomic state object
|
|
* @connector: connector to grab
|
|
*
|
|
* This function returns the old connector state for the given connector,
|
|
* or NULL if the connector is not part of the global atomic state.
|
|
*/
|
|
static inline struct drm_connector_state *
|
|
drm_atomic_get_old_connector_state(struct drm_atomic_state *state,
|
|
struct drm_connector *connector)
|
|
{
|
|
int index = drm_connector_index(connector);
|
|
|
|
if (index >= state->num_connector)
|
|
return NULL;
|
|
|
|
return state->connectors[index].old_state;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_new_connector_state - get connector state, if it exists
|
|
* @state: global atomic state object
|
|
* @connector: connector to grab
|
|
*
|
|
* This function returns the new connector state for the given connector,
|
|
* or NULL if the connector is not part of the global atomic state.
|
|
*/
|
|
static inline struct drm_connector_state *
|
|
drm_atomic_get_new_connector_state(struct drm_atomic_state *state,
|
|
struct drm_connector *connector)
|
|
{
|
|
int index = drm_connector_index(connector);
|
|
|
|
if (index >= state->num_connector)
|
|
return NULL;
|
|
|
|
return state->connectors[index].new_state;
|
|
}
|
|
|
|
/**
|
|
* __drm_atomic_get_current_plane_state - get current plane state
|
|
* @state: global atomic state object
|
|
* @plane: plane to grab
|
|
*
|
|
* This function returns the plane state for the given plane, either from
|
|
* @state, or if the plane isn't part of the atomic state update, from @plane.
|
|
* This is useful in atomic check callbacks, when drivers need to peek at, but
|
|
* not change, state of other planes, since it avoids threading an error code
|
|
* back up the call chain.
|
|
*
|
|
* WARNING:
|
|
*
|
|
* Note that this function is in general unsafe since it doesn't check for the
|
|
* required locking for access state structures. Drivers must ensure that it is
|
|
* safe to access the returned state structure through other means. One common
|
|
* example is when planes are fixed to a single CRTC, and the driver knows that
|
|
* the CRTC lock is held already. In that case holding the CRTC lock gives a
|
|
* read-lock on all planes connected to that CRTC. But if planes can be
|
|
* reassigned things get more tricky. In that case it's better to use
|
|
* drm_atomic_get_plane_state and wire up full error handling.
|
|
*
|
|
* Returns:
|
|
*
|
|
* Read-only pointer to the current plane state.
|
|
*/
|
|
static inline const struct drm_plane_state *
|
|
__drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
|
|
struct drm_plane *plane)
|
|
{
|
|
if (state->planes[drm_plane_index(plane)].state)
|
|
return state->planes[drm_plane_index(plane)].state;
|
|
|
|
return plane->state;
|
|
}
|
|
|
|
int __must_check
|
|
drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
|
|
struct drm_encoder *encoder);
|
|
int __must_check
|
|
drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
|
|
struct drm_crtc *crtc);
|
|
int __must_check
|
|
drm_atomic_add_affected_planes(struct drm_atomic_state *state,
|
|
struct drm_crtc *crtc);
|
|
|
|
int __must_check drm_atomic_check_only(struct drm_atomic_state *state);
|
|
int __must_check drm_atomic_commit(struct drm_atomic_state *state);
|
|
int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state);
|
|
|
|
void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
|
|
|
|
/**
|
|
* for_each_oldnew_connector_in_state - iterate over all connectors in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @connector: &struct drm_connector iteration cursor
|
|
* @old_connector_state: &struct drm_connector_state iteration cursor for the
|
|
* old state
|
|
* @new_connector_state: &struct drm_connector_state iteration cursor for the
|
|
* new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all connectors in an atomic update, tracking both old and
|
|
* new state. This is useful in places where the state delta needs to be
|
|
* considered, for example in atomic check functions.
|
|
*/
|
|
#define for_each_oldnew_connector_in_state(__state, connector, old_connector_state, new_connector_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->num_connector; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->connectors[__i].ptr && \
|
|
((connector) = (__state)->connectors[__i].ptr, \
|
|
(void)(connector) /* Only to avoid unused-but-set-variable warning */, \
|
|
(old_connector_state) = (__state)->connectors[__i].old_state, \
|
|
(new_connector_state) = (__state)->connectors[__i].new_state, 1))
|
|
|
|
/**
|
|
* for_each_old_connector_in_state - iterate over all connectors in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @connector: &struct drm_connector iteration cursor
|
|
* @old_connector_state: &struct drm_connector_state iteration cursor for the
|
|
* old state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all connectors in an atomic update, tracking only the old
|
|
* state. This is useful in disable functions, where we need the old state the
|
|
* hardware is still in.
|
|
*/
|
|
#define for_each_old_connector_in_state(__state, connector, old_connector_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->num_connector; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->connectors[__i].ptr && \
|
|
((connector) = (__state)->connectors[__i].ptr, \
|
|
(void)(connector) /* Only to avoid unused-but-set-variable warning */, \
|
|
(old_connector_state) = (__state)->connectors[__i].old_state, 1))
|
|
|
|
/**
|
|
* for_each_new_connector_in_state - iterate over all connectors in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @connector: &struct drm_connector iteration cursor
|
|
* @new_connector_state: &struct drm_connector_state iteration cursor for the
|
|
* new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all connectors in an atomic update, tracking only the new
|
|
* state. This is useful in enable functions, where we need the new state the
|
|
* hardware should be in when the atomic commit operation has completed.
|
|
*/
|
|
#define for_each_new_connector_in_state(__state, connector, new_connector_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->num_connector; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->connectors[__i].ptr && \
|
|
((connector) = (__state)->connectors[__i].ptr, \
|
|
(void)(connector) /* Only to avoid unused-but-set-variable warning */, \
|
|
(new_connector_state) = (__state)->connectors[__i].new_state, \
|
|
(void)(new_connector_state) /* Only to avoid unused-but-set-variable warning */, 1))
|
|
|
|
/**
|
|
* for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @crtc: &struct drm_crtc iteration cursor
|
|
* @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
|
|
* @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all CRTCs in an atomic update, tracking both old and
|
|
* new state. This is useful in places where the state delta needs to be
|
|
* considered, for example in atomic check functions.
|
|
*/
|
|
#define for_each_oldnew_crtc_in_state(__state, crtc, old_crtc_state, new_crtc_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->dev->mode_config.num_crtc; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->crtcs[__i].ptr && \
|
|
((crtc) = (__state)->crtcs[__i].ptr, \
|
|
(void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
|
|
(old_crtc_state) = (__state)->crtcs[__i].old_state, \
|
|
(void)(old_crtc_state) /* Only to avoid unused-but-set-variable warning */, \
|
|
(new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
|
|
|
|
/**
|
|
* for_each_old_crtc_in_state - iterate over all CRTCs in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @crtc: &struct drm_crtc iteration cursor
|
|
* @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all CRTCs in an atomic update, tracking only the old
|
|
* state. This is useful in disable functions, where we need the old state the
|
|
* hardware is still in.
|
|
*/
|
|
#define for_each_old_crtc_in_state(__state, crtc, old_crtc_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->dev->mode_config.num_crtc; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->crtcs[__i].ptr && \
|
|
((crtc) = (__state)->crtcs[__i].ptr, \
|
|
(old_crtc_state) = (__state)->crtcs[__i].old_state, 1))
|
|
|
|
/**
|
|
* for_each_new_crtc_in_state - iterate over all CRTCs in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @crtc: &struct drm_crtc iteration cursor
|
|
* @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all CRTCs in an atomic update, tracking only the new
|
|
* state. This is useful in enable functions, where we need the new state the
|
|
* hardware should be in when the atomic commit operation has completed.
|
|
*/
|
|
#define for_each_new_crtc_in_state(__state, crtc, new_crtc_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->dev->mode_config.num_crtc; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->crtcs[__i].ptr && \
|
|
((crtc) = (__state)->crtcs[__i].ptr, \
|
|
(void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
|
|
(new_crtc_state) = (__state)->crtcs[__i].new_state, \
|
|
(void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 1))
|
|
|
|
/**
|
|
* for_each_oldnew_plane_in_state - iterate over all planes in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @plane: &struct drm_plane iteration cursor
|
|
* @old_plane_state: &struct drm_plane_state iteration cursor for the old state
|
|
* @new_plane_state: &struct drm_plane_state iteration cursor for the new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all planes in an atomic update, tracking both old and
|
|
* new state. This is useful in places where the state delta needs to be
|
|
* considered, for example in atomic check functions.
|
|
*/
|
|
#define for_each_oldnew_plane_in_state(__state, plane, old_plane_state, new_plane_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->dev->mode_config.num_total_plane; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->planes[__i].ptr && \
|
|
((plane) = (__state)->planes[__i].ptr, \
|
|
(void)(plane) /* Only to avoid unused-but-set-variable warning */, \
|
|
(old_plane_state) = (__state)->planes[__i].old_state,\
|
|
(new_plane_state) = (__state)->planes[__i].new_state, 1))
|
|
|
|
/**
|
|
* for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic
|
|
* update in reverse order
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @plane: &struct drm_plane iteration cursor
|
|
* @old_plane_state: &struct drm_plane_state iteration cursor for the old state
|
|
* @new_plane_state: &struct drm_plane_state iteration cursor for the new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all planes in an atomic update in reverse order,
|
|
* tracking both old and new state. This is useful in places where the
|
|
* state delta needs to be considered, for example in atomic check functions.
|
|
*/
|
|
#define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \
|
|
for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \
|
|
(__i) >= 0; \
|
|
(__i)--) \
|
|
for_each_if ((__state)->planes[__i].ptr && \
|
|
((plane) = (__state)->planes[__i].ptr, \
|
|
(old_plane_state) = (__state)->planes[__i].old_state,\
|
|
(new_plane_state) = (__state)->planes[__i].new_state, 1))
|
|
|
|
/**
|
|
* for_each_old_plane_in_state - iterate over all planes in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @plane: &struct drm_plane iteration cursor
|
|
* @old_plane_state: &struct drm_plane_state iteration cursor for the old state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all planes in an atomic update, tracking only the old
|
|
* state. This is useful in disable functions, where we need the old state the
|
|
* hardware is still in.
|
|
*/
|
|
#define for_each_old_plane_in_state(__state, plane, old_plane_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->dev->mode_config.num_total_plane; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->planes[__i].ptr && \
|
|
((plane) = (__state)->planes[__i].ptr, \
|
|
(old_plane_state) = (__state)->planes[__i].old_state, 1))
|
|
/**
|
|
* for_each_new_plane_in_state - iterate over all planes in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @plane: &struct drm_plane iteration cursor
|
|
* @new_plane_state: &struct drm_plane_state iteration cursor for the new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all planes in an atomic update, tracking only the new
|
|
* state. This is useful in enable functions, where we need the new state the
|
|
* hardware should be in when the atomic commit operation has completed.
|
|
*/
|
|
#define for_each_new_plane_in_state(__state, plane, new_plane_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->dev->mode_config.num_total_plane; \
|
|
(__i)++) \
|
|
for_each_if ((__state)->planes[__i].ptr && \
|
|
((plane) = (__state)->planes[__i].ptr, \
|
|
(void)(plane) /* Only to avoid unused-but-set-variable warning */, \
|
|
(new_plane_state) = (__state)->planes[__i].new_state, \
|
|
(void)(new_plane_state) /* Only to avoid unused-but-set-variable warning */, 1))
|
|
|
|
/**
|
|
* for_each_oldnew_private_obj_in_state - iterate over all private objects in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @obj: &struct drm_private_obj iteration cursor
|
|
* @old_obj_state: &struct drm_private_state iteration cursor for the old state
|
|
* @new_obj_state: &struct drm_private_state iteration cursor for the new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all private objects in an atomic update, tracking both
|
|
* old and new state. This is useful in places where the state delta needs
|
|
* to be considered, for example in atomic check functions.
|
|
*/
|
|
#define for_each_oldnew_private_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->num_private_objs && \
|
|
((obj) = (__state)->private_objs[__i].ptr, \
|
|
(old_obj_state) = (__state)->private_objs[__i].old_state, \
|
|
(new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
|
|
(__i)++)
|
|
|
|
/**
|
|
* for_each_old_private_obj_in_state - iterate over all private objects in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @obj: &struct drm_private_obj iteration cursor
|
|
* @old_obj_state: &struct drm_private_state iteration cursor for the old state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all private objects in an atomic update, tracking only
|
|
* the old state. This is useful in disable functions, where we need the old
|
|
* state the hardware is still in.
|
|
*/
|
|
#define for_each_old_private_obj_in_state(__state, obj, old_obj_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->num_private_objs && \
|
|
((obj) = (__state)->private_objs[__i].ptr, \
|
|
(old_obj_state) = (__state)->private_objs[__i].old_state, 1); \
|
|
(__i)++)
|
|
|
|
/**
|
|
* for_each_new_private_obj_in_state - iterate over all private objects in an atomic update
|
|
* @__state: &struct drm_atomic_state pointer
|
|
* @obj: &struct drm_private_obj iteration cursor
|
|
* @new_obj_state: &struct drm_private_state iteration cursor for the new state
|
|
* @__i: int iteration cursor, for macro-internal use
|
|
*
|
|
* This iterates over all private objects in an atomic update, tracking only
|
|
* the new state. This is useful in enable functions, where we need the new state the
|
|
* hardware should be in when the atomic commit operation has completed.
|
|
*/
|
|
#define for_each_new_private_obj_in_state(__state, obj, new_obj_state, __i) \
|
|
for ((__i) = 0; \
|
|
(__i) < (__state)->num_private_objs && \
|
|
((obj) = (__state)->private_objs[__i].ptr, \
|
|
(new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
|
|
(__i)++)
|
|
|
|
/**
|
|
* drm_atomic_crtc_needs_modeset - compute combined modeset need
|
|
* @state: &drm_crtc_state for the CRTC
|
|
*
|
|
* To give drivers flexibility &struct drm_crtc_state has 3 booleans to track
|
|
* whether the state CRTC changed enough to need a full modeset cycle:
|
|
* mode_changed, active_changed and connectors_changed. This helper simply
|
|
* combines these three to compute the overall need for a modeset for @state.
|
|
*
|
|
* The atomic helper code sets these booleans, but drivers can and should
|
|
* change them appropriately to accurately represent whether a modeset is
|
|
* really needed. In general, drivers should avoid full modesets whenever
|
|
* possible.
|
|
*
|
|
* For example if the CRTC mode has changed, and the hardware is able to enact
|
|
* the requested mode change without going through a full modeset, the driver
|
|
* should clear mode_changed in its &drm_mode_config_funcs.atomic_check
|
|
* implementation.
|
|
*/
|
|
static inline bool
|
|
drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state)
|
|
{
|
|
return state->mode_changed || state->active_changed ||
|
|
state->connectors_changed;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_crtc_effectively_active - compute whether CRTC is actually active
|
|
* @state: &drm_crtc_state for the CRTC
|
|
*
|
|
* When in self refresh mode, the crtc_state->active value will be false, since
|
|
* the CRTC is off. However in some cases we're interested in whether the CRTC
|
|
* is active, or effectively active (ie: it's connected to an active display).
|
|
* In these cases, use this function instead of just checking active.
|
|
*/
|
|
static inline bool
|
|
drm_atomic_crtc_effectively_active(const struct drm_crtc_state *state)
|
|
{
|
|
return state->active || state->self_refresh_active;
|
|
}
|
|
|
|
/**
|
|
* struct drm_bus_cfg - bus configuration
|
|
*
|
|
* This structure stores the configuration of a physical bus between two
|
|
* components in an output pipeline, usually between two bridges, an encoder
|
|
* and a bridge, or a bridge and a connector.
|
|
*
|
|
* The bus configuration is stored in &drm_bridge_state separately for the
|
|
* input and output buses, as seen from the point of view of each bridge. The
|
|
* bus configuration of a bridge output is usually identical to the
|
|
* configuration of the next bridge's input, but may differ if the signals are
|
|
* modified between the two bridges, for instance by an inverter on the board.
|
|
* The input and output configurations of a bridge may differ if the bridge
|
|
* modifies the signals internally, for instance by performing format
|
|
* conversion, or modifying signals polarities.
|
|
*/
|
|
struct drm_bus_cfg {
|
|
/**
|
|
* @format: format used on this bus (one of the MEDIA_BUS_FMT_* format)
|
|
*
|
|
* This field should not be directly modified by drivers
|
|
* (drm_atomic_bridge_chain_select_bus_fmts() takes care of the bus
|
|
* format negotiation).
|
|
*/
|
|
u32 format;
|
|
|
|
/**
|
|
* @flags: DRM_BUS_* flags used on this bus
|
|
*/
|
|
u32 flags;
|
|
};
|
|
|
|
/**
|
|
* struct drm_bridge_state - Atomic bridge state object
|
|
*/
|
|
struct drm_bridge_state {
|
|
/**
|
|
* @base: inherit from &drm_private_state
|
|
*/
|
|
struct drm_private_state base;
|
|
|
|
/**
|
|
* @bridge: the bridge this state refers to
|
|
*/
|
|
struct drm_bridge *bridge;
|
|
|
|
/**
|
|
* @input_bus_cfg: input bus configuration
|
|
*/
|
|
struct drm_bus_cfg input_bus_cfg;
|
|
|
|
/**
|
|
* @output_bus_cfg: input bus configuration
|
|
*/
|
|
struct drm_bus_cfg output_bus_cfg;
|
|
};
|
|
|
|
static inline struct drm_bridge_state *
|
|
drm_priv_to_bridge_state(struct drm_private_state *priv)
|
|
{
|
|
return container_of(priv, struct drm_bridge_state, base);
|
|
}
|
|
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_bridge_state(struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge);
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_old_bridge_state(struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge);
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_new_bridge_state(struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge);
|
|
|
|
#endif /* DRM_ATOMIC_H_ */
|