Current File : //usr/src/kernels/3.10.0-1160.80.1.el7.centos.plus.x86_64/include/drm/drm_atomic.h
/*
* 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.
*/
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.
*/
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.
*/
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 it's 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.
*/
struct drm_private_obj {
/**
* @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;
};
/**
* 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;
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_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);
/**
* 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_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, \
(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, \
(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, \
(new_connector_state) = (__state)->connectors[__i].new_state, 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, \
(old_crtc_state) = (__state)->crtcs[__i].old_state, \
(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, \
(new_crtc_state) = (__state)->crtcs[__i].new_state, 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, \
(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, \
(new_plane_state) = (__state)->planes[__i].new_state, 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;
}
#endif /* DRM_ATOMIC_H_ */
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