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1103 lines
40 KiB
/* |
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* Copyright (C) 2014 Red Hat |
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* Copyright (C) 2014 Intel Corp. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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* OTHER DEALINGS IN THE SOFTWARE. |
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* |
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* Authors: |
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* Rob Clark <[email protected]> |
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* Daniel Vetter <[email protected]> |
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*/ |
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#ifndef DRM_ATOMIC_H_ |
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#define DRM_ATOMIC_H_ |
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#include <drm/drm_crtc.h> |
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#include <drm/drm_util.h> |
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|
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/** |
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* struct drm_crtc_commit - track modeset commits on a CRTC |
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* |
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* This structure is used to track pending modeset changes and atomic commit on |
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* a per-CRTC basis. Since updating the list should never block, this structure |
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* is reference counted to allow waiters to safely wait on an event to complete, |
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* without holding any locks. |
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* |
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* It has 3 different events in total to allow a fine-grained synchronization |
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* between outstanding updates:: |
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* |
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* atomic commit thread hardware |
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* |
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* write new state into hardware ----> ... |
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* signal hw_done |
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* switch to new state on next |
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* ... v/hblank |
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* |
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* wait for buffers to show up ... |
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* |
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* ... send completion irq |
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* irq handler signals flip_done |
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* cleanup old buffers |
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* |
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* signal cleanup_done |
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* |
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* wait for flip_done <---- |
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* clean up atomic state |
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* |
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* The important bit to know is that &cleanup_done is the terminal event, but the |
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* ordering between &flip_done and &hw_done is entirely up to the specific driver |
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* and modeset state change. |
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* |
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* For an implementation of how to use this look at |
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* drm_atomic_helper_setup_commit() from the atomic helper library. |
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*/ |
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struct drm_crtc_commit { |
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/** |
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* @crtc: |
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* |
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* DRM CRTC for this commit. |
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*/ |
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struct drm_crtc *crtc; |
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/** |
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* @ref: |
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* |
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* Reference count for this structure. Needed to allow blocking on |
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* completions without the risk of the completion disappearing |
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* meanwhile. |
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*/ |
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struct kref ref; |
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/** |
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* @flip_done: |
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* |
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* Will be signaled when the hardware has flipped to the new set of |
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* buffers. Signals at the same time as when the drm event for this |
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* commit is sent to userspace, or when an out-fence is singalled. Note |
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* that for most hardware, in most cases this happens after @hw_done is |
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* signalled. |
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* |
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* Completion of this stage is signalled implicitly by calling |
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* drm_crtc_send_vblank_event() on &drm_crtc_state.event. |
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*/ |
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struct completion flip_done; |
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/** |
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* @hw_done: |
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* |
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* Will be signalled when all hw register changes for this commit have |
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* been written out. Especially when disabling a pipe this can be much |
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* later than @flip_done, since that can signal already when the |
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* screen goes black, whereas to fully shut down a pipe more register |
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* I/O is required. |
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* |
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* Note that this does not need to include separately reference-counted |
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* resources like backing storage buffer pinning, or runtime pm |
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* management. |
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* |
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* Drivers should call drm_atomic_helper_commit_hw_done() to signal |
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* completion of this stage. |
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*/ |
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struct completion hw_done; |
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/** |
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* @cleanup_done: |
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* |
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* Will be signalled after old buffers have been cleaned up by calling |
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* drm_atomic_helper_cleanup_planes(). Since this can only happen after |
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* a vblank wait completed it might be a bit later. This completion is |
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* useful to throttle updates and avoid hardware updates getting ahead |
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* of the buffer cleanup too much. |
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* |
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* Drivers should call drm_atomic_helper_commit_cleanup_done() to signal |
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* completion of this stage. |
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*/ |
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struct completion cleanup_done; |
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/** |
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* @commit_entry: |
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* |
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* Entry on the per-CRTC &drm_crtc.commit_list. Protected by |
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* $drm_crtc.commit_lock. |
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*/ |
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struct list_head commit_entry; |
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/** |
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* @event: |
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* |
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* &drm_pending_vblank_event pointer to clean up private events. |
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*/ |
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struct drm_pending_vblank_event *event; |
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/** |
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* @abort_completion: |
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* |
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* A flag that's set after drm_atomic_helper_setup_commit() takes a |
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* second reference for the completion of $drm_crtc_state.event. It's |
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* used by the free code to remove the second reference if commit fails. |
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*/ |
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bool abort_completion; |
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}; |
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struct __drm_planes_state { |
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struct drm_plane *ptr; |
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struct drm_plane_state *state, *old_state, *new_state; |
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}; |
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struct __drm_crtcs_state { |
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struct drm_crtc *ptr; |
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struct drm_crtc_state *state, *old_state, *new_state; |
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/** |
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* @commit: |
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* |
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* A reference to the CRTC commit object that is kept for use by |
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* drm_atomic_helper_wait_for_flip_done() after |
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* drm_atomic_helper_commit_hw_done() is called. This ensures that a |
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* concurrent commit won't free a commit object that is still in use. |
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*/ |
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struct drm_crtc_commit *commit; |
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s32 __user *out_fence_ptr; |
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u64 last_vblank_count; |
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}; |
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struct __drm_connnectors_state { |
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struct drm_connector *ptr; |
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struct drm_connector_state *state, *old_state, *new_state; |
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/** |
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* @out_fence_ptr: |
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* |
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* User-provided pointer which the kernel uses to return a sync_file |
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* file descriptor. Used by writeback connectors to signal completion of |
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* the writeback. |
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*/ |
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s32 __user *out_fence_ptr; |
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}; |
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struct drm_private_obj; |
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struct drm_private_state; |
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/** |
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* struct drm_private_state_funcs - atomic state functions for private objects |
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* |
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* These hooks are used by atomic helpers to create, swap and destroy states of |
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* private objects. The structure itself is used as a vtable to identify the |
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* associated private object type. Each private object type that needs to be |
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* added to the atomic states is expected to have an implementation of these |
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* hooks and pass a pointer to its drm_private_state_funcs struct to |
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* drm_atomic_get_private_obj_state(). |
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*/ |
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struct drm_private_state_funcs { |
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/** |
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* @atomic_duplicate_state: |
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* |
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* Duplicate the current state of the private object and return it. It |
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* is an error to call this before obj->state has been initialized. |
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* |
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* RETURNS: |
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* |
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* Duplicated atomic state or NULL when obj->state is not |
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* initialized or allocation failed. |
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*/ |
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struct drm_private_state *(*atomic_duplicate_state)(struct drm_private_obj *obj); |
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/** |
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* @atomic_destroy_state: |
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* |
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* Frees the private object state created with @atomic_duplicate_state. |
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*/ |
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void (*atomic_destroy_state)(struct drm_private_obj *obj, |
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struct drm_private_state *state); |
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}; |
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/** |
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* struct drm_private_obj - base struct for driver private atomic object |
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* |
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* A driver private object is initialized by calling |
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* drm_atomic_private_obj_init() and cleaned up by calling |
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* drm_atomic_private_obj_fini(). |
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* |
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* Currently only tracks the state update functions and the opaque driver |
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* private state itself, but in the future might also track which |
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* &drm_modeset_lock is required to duplicate and update this object's state. |
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* |
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* All private objects must be initialized before the DRM device they are |
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* attached to is registered to the DRM subsystem (call to drm_dev_register()) |
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* and should stay around until this DRM device is unregistered (call to |
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* drm_dev_unregister()). In other words, private objects lifetime is tied |
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* to the DRM device lifetime. This implies that: |
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* |
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* 1/ all calls to drm_atomic_private_obj_init() must be done before calling |
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* drm_dev_register() |
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* 2/ all calls to drm_atomic_private_obj_fini() must be done after calling |
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* drm_dev_unregister() |
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* |
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* If that private object is used to store a state shared by multiple |
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* CRTCs, proper care must be taken to ensure that non-blocking commits are |
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* properly ordered to avoid a use-after-free issue. |
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* |
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* Indeed, assuming a sequence of two non-blocking &drm_atomic_commit on two |
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* different &drm_crtc using different &drm_plane and &drm_connector, so with no |
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* resources shared, there's no guarantee on which commit is going to happen |
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* first. However, the second &drm_atomic_commit will consider the first |
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* &drm_private_obj its old state, and will be in charge of freeing it whenever |
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* the second &drm_atomic_commit is done. |
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* |
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* If the first &drm_atomic_commit happens after it, it will consider its |
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* &drm_private_obj the new state and will be likely to access it, resulting in |
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* an access to a freed memory region. Drivers should store (and get a reference |
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* to) the &drm_crtc_commit structure in our private state in |
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* &drm_mode_config_helper_funcs.atomic_commit_setup, and then wait for that |
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* commit to complete as the first step of |
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* &drm_mode_config_helper_funcs.atomic_commit_tail, similar to |
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* drm_atomic_helper_wait_for_dependencies(). |
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*/ |
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struct drm_private_obj { |
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/** |
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* @head: List entry used to attach a private object to a &drm_device |
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* (queued to &drm_mode_config.privobj_list). |
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*/ |
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struct list_head head; |
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/** |
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* @lock: Modeset lock to protect the state object. |
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*/ |
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struct drm_modeset_lock lock; |
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/** |
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* @state: Current atomic state for this driver private object. |
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*/ |
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struct drm_private_state *state; |
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/** |
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* @funcs: |
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* |
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* Functions to manipulate the state of this driver private object, see |
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* &drm_private_state_funcs. |
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*/ |
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const struct drm_private_state_funcs *funcs; |
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}; |
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/** |
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* drm_for_each_privobj() - private object iterator |
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* |
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* @privobj: pointer to the current private object. Updated after each |
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* iteration |
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* @dev: the DRM device we want get private objects from |
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* |
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* Allows one to iterate over all private objects attached to @dev |
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*/ |
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#define drm_for_each_privobj(privobj, dev) \ |
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list_for_each_entry(privobj, &(dev)->mode_config.privobj_list, head) |
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/** |
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* struct drm_private_state - base struct for driver private object state |
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* @state: backpointer to global drm_atomic_state |
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* |
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* Currently only contains a backpointer to the overall atomic update, but in |
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* the future also might hold synchronization information similar to e.g. |
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* &drm_crtc.commit. |
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*/ |
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struct drm_private_state { |
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struct drm_atomic_state *state; |
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}; |
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struct __drm_private_objs_state { |
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struct drm_private_obj *ptr; |
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struct drm_private_state *state, *old_state, *new_state; |
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}; |
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/** |
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* struct drm_atomic_state - the global state object for atomic updates |
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* @ref: count of all references to this state (will not be freed until zero) |
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* @dev: parent DRM device |
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* @async_update: hint for asynchronous plane update |
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* @planes: pointer to array of structures with per-plane data |
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* @crtcs: pointer to array of CRTC pointers |
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* @num_connector: size of the @connectors and @connector_states arrays |
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* @connectors: pointer to array of structures with per-connector data |
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* @num_private_objs: size of the @private_objs array |
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* @private_objs: pointer to array of private object pointers |
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* @acquire_ctx: acquire context for this atomic modeset state update |
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* |
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* States are added to an atomic update by calling drm_atomic_get_crtc_state(), |
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* drm_atomic_get_plane_state(), drm_atomic_get_connector_state(), or for |
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* private state structures, drm_atomic_get_private_obj_state(). |
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*/ |
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struct drm_atomic_state { |
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struct kref ref; |
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struct drm_device *dev; |
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/** |
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* @allow_modeset: |
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* |
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* Allow full modeset. This is used by the ATOMIC IOCTL handler to |
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* implement the DRM_MODE_ATOMIC_ALLOW_MODESET flag. Drivers should |
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* never consult this flag, instead looking at the output of |
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* drm_atomic_crtc_needs_modeset(). |
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*/ |
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bool allow_modeset : 1; |
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/** |
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* @legacy_cursor_update: |
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* |
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* Hint to enforce legacy cursor IOCTL semantics. |
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* |
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* WARNING: This is thoroughly broken and pretty much impossible to |
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* implement correctly. Drivers must ignore this and should instead |
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* implement &drm_plane_helper_funcs.atomic_async_check and |
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* &drm_plane_helper_funcs.atomic_async_commit hooks. New users of this |
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* flag are not allowed. |
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*/ |
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bool legacy_cursor_update : 1; |
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bool async_update : 1; |
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/** |
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* @duplicated: |
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* |
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* Indicates whether or not this atomic state was duplicated using |
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* drm_atomic_helper_duplicate_state(). Drivers and atomic helpers |
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* should use this to fixup normal inconsistencies in duplicated |
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* states. |
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*/ |
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bool duplicated : 1; |
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struct __drm_planes_state *planes; |
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struct __drm_crtcs_state *crtcs; |
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int num_connector; |
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struct __drm_connnectors_state *connectors; |
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int num_private_objs; |
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struct __drm_private_objs_state *private_objs; |
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struct drm_modeset_acquire_ctx *acquire_ctx; |
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/** |
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* @fake_commit: |
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* |
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* Used for signaling unbound planes/connectors. |
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* When a connector or plane is not bound to any CRTC, it's still important |
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* to preserve linearity to prevent the atomic states from being freed to early. |
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* |
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* This commit (if set) is not bound to any CRTC, but will be completed when |
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* drm_atomic_helper_commit_hw_done() is called. |
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*/ |
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struct drm_crtc_commit *fake_commit; |
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/** |
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* @commit_work: |
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* |
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* Work item which can be used by the driver or helpers to execute the |
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* commit without blocking. |
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*/ |
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struct work_struct commit_work; |
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}; |
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void __drm_crtc_commit_free(struct kref *kref); |
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/** |
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* drm_crtc_commit_get - acquire a reference to the CRTC commit |
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* @commit: CRTC commit |
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* |
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* Increases the reference of @commit. |
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* |
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* Returns: |
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* The pointer to @commit, with reference increased. |
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*/ |
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static inline struct drm_crtc_commit *drm_crtc_commit_get(struct drm_crtc_commit *commit) |
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{ |
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kref_get(&commit->ref); |
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return commit; |
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} |
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/** |
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* drm_crtc_commit_put - release a reference to the CRTC commmit |
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* @commit: CRTC commit |
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* |
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* This releases a reference to @commit which is freed after removing the |
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* final reference. No locking required and callable from any context. |
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*/ |
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static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit) |
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{ |
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kref_put(&commit->ref, __drm_crtc_commit_free); |
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} |
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struct drm_atomic_state * __must_check |
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drm_atomic_state_alloc(struct drm_device *dev); |
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void drm_atomic_state_clear(struct drm_atomic_state *state); |
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/** |
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* drm_atomic_state_get - acquire a reference to the atomic state |
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* @state: The atomic state |
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* |
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* Returns a new reference to the @state |
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*/ |
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static inline struct drm_atomic_state * |
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drm_atomic_state_get(struct drm_atomic_state *state) |
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{ |
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kref_get(&state->ref); |
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return state; |
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} |
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void __drm_atomic_state_free(struct kref *ref); |
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/** |
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* drm_atomic_state_put - release a reference to the atomic state |
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* @state: The atomic state |
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* |
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* This releases a reference to @state which is freed after removing the |
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* final reference. No locking required and callable from any context. |
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*/ |
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static inline void drm_atomic_state_put(struct drm_atomic_state *state) |
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{ |
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kref_put(&state->ref, __drm_atomic_state_free); |
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} |
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int __must_check |
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drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state); |
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void drm_atomic_state_default_clear(struct drm_atomic_state *state); |
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void drm_atomic_state_default_release(struct drm_atomic_state *state); |
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struct drm_crtc_state * __must_check |
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drm_atomic_get_crtc_state(struct drm_atomic_state *state, |
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struct drm_crtc *crtc); |
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struct drm_plane_state * __must_check |
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drm_atomic_get_plane_state(struct drm_atomic_state *state, |
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struct drm_plane *plane); |
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struct drm_connector_state * __must_check |
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drm_atomic_get_connector_state(struct drm_atomic_state *state, |
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struct drm_connector *connector); |
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void drm_atomic_private_obj_init(struct drm_device *dev, |
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struct drm_private_obj *obj, |
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struct drm_private_state *state, |
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const struct drm_private_state_funcs *funcs); |
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void drm_atomic_private_obj_fini(struct drm_private_obj *obj); |
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struct drm_private_state * __must_check |
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drm_atomic_get_private_obj_state(struct drm_atomic_state *state, |
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struct drm_private_obj *obj); |
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struct drm_private_state * |
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drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state, |
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struct drm_private_obj *obj); |
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struct drm_private_state * |
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drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state, |
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struct drm_private_obj *obj); |
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struct drm_connector * |
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drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state, |
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struct drm_encoder *encoder); |
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struct drm_connector * |
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drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state, |
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struct drm_encoder *encoder); |
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|
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/** |
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* drm_atomic_get_existing_crtc_state - get CRTC state, if it exists |
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* @state: global atomic state object |
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* @crtc: CRTC to grab |
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* |
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* This function returns the CRTC state for the given CRTC, or NULL |
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* if the CRTC is not part of the global atomic state. |
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* |
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* This function is deprecated, @drm_atomic_get_old_crtc_state or |
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* @drm_atomic_get_new_crtc_state should be used instead. |
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*/ |
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static inline struct drm_crtc_state * |
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drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state, |
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struct drm_crtc *crtc) |
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{ |
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return state->crtcs[drm_crtc_index(crtc)].state; |
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} |
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/** |
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* drm_atomic_get_old_crtc_state - get old CRTC state, if it exists |
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* @state: global atomic state object |
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* @crtc: CRTC to grab |
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* |
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* This function returns the old CRTC state for the given CRTC, or |
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* NULL if the CRTC is not part of the global atomic state. |
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*/ |
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static inline struct drm_crtc_state * |
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drm_atomic_get_old_crtc_state(struct drm_atomic_state *state, |
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struct drm_crtc *crtc) |
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{ |
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return state->crtcs[drm_crtc_index(crtc)].old_state; |
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} |
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/** |
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* drm_atomic_get_new_crtc_state - get new CRTC state, if it exists |
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* @state: global atomic state object |
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* @crtc: CRTC to grab |
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* |
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* This function returns the new CRTC state for the given CRTC, or |
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* NULL if the CRTC is not part of the global atomic state. |
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*/ |
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static inline struct drm_crtc_state * |
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drm_atomic_get_new_crtc_state(struct drm_atomic_state *state, |
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struct drm_crtc *crtc) |
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{ |
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return state->crtcs[drm_crtc_index(crtc)].new_state; |
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} |
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|
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/** |
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* drm_atomic_get_existing_plane_state - get plane state, if it exists |
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* @state: global atomic state object |
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* @plane: plane to grab |
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* |
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* This function returns the plane state for the given plane, or NULL |
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* if the plane is not part of the global atomic state. |
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* |
|
* 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, \ |
|
(void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 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, \ |
|
(void)(crtc) /* Only to avoid unused-but-set-variable warning */, \ |
|
(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) |
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{ |
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return state->active || state->self_refresh_active; |
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} |
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|
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/** |
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* struct drm_bus_cfg - bus configuration |
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* |
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* This structure stores the configuration of a physical bus between two |
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* components in an output pipeline, usually between two bridges, an encoder |
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* and a bridge, or a bridge and a connector. |
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* |
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* The bus configuration is stored in &drm_bridge_state separately for the |
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* input and output buses, as seen from the point of view of each bridge. The |
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* bus configuration of a bridge output is usually identical to the |
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* 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. |
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* 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. |
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*/ |
|
struct drm_bus_cfg { |
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/** |
|
* @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; |
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}; |
|
|
|
/** |
|
* 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_ */
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