1144 lines
41 KiB
C
1144 lines
41 KiB
C
/*
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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 <robdclark@gmail.com>
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* Daniel Vetter <daniel.vetter@ffwll.ch>
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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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* 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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* See also drm_crtc_commit_wait().
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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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* @atomic_print_state:
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*
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* If driver subclasses &struct drm_private_state, it should implement
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* this optional hook for printing additional driver specific state.
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*
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* Do not call this directly, use drm_atomic_private_obj_print_state()
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* instead.
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*/
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void (*atomic_print_state)(struct drm_printer *p,
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const 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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*
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* Currently only contains a backpointer to the overall atomic update,
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* and the relevant private object but in the future also might hold
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* synchronization information similar to e.g. &drm_crtc.commit.
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*/
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struct drm_private_state {
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/**
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* @state: backpointer to global drm_atomic_state
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*/
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struct drm_atomic_state *state;
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/**
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* @obj: backpointer to the private object
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*/
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struct drm_private_obj *obj;
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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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int drm_crtc_commit_wait(struct drm_crtc_commit *commit);
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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);
|
|
void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
|
|
|
|
struct drm_private_state * __must_check
|
|
drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj);
|
|
struct drm_private_state *
|
|
drm_atomic_get_old_private_obj_state(const struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj);
|
|
struct drm_private_state *
|
|
drm_atomic_get_new_private_obj_state(const struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj);
|
|
|
|
struct drm_connector *
|
|
drm_atomic_get_old_connector_for_encoder(const struct drm_atomic_state *state,
|
|
struct drm_encoder *encoder);
|
|
struct drm_connector *
|
|
drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state,
|
|
struct drm_encoder *encoder);
|
|
|
|
/**
|
|
* drm_atomic_get_existing_crtc_state - get CRTC state, if it exists
|
|
* @state: global atomic state object
|
|
* @crtc: CRTC to grab
|
|
*
|
|
* This function returns the CRTC state for the given CRTC, or NULL
|
|
* if the CRTC is not part of the global atomic state.
|
|
*
|
|
* This function is deprecated, @drm_atomic_get_old_crtc_state or
|
|
* @drm_atomic_get_new_crtc_state should be used instead.
|
|
*/
|
|
static inline struct drm_crtc_state *
|
|
drm_atomic_get_existing_crtc_state(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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_new_plane_in_state_reverse - other than only tracking new state,
|
|
* it's the same as for_each_oldnew_plane_in_state_reverse
|
|
* @__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
|
|
*/
|
|
#define for_each_new_plane_in_state_reverse(__state, plane, 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, \
|
|
(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, \
|
|
(void)(obj) /* Only to avoid unused-but-set-variable warning */, \
|
|
(new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
|
|
(__i)++)
|
|
|
|
/**
|
|
* drm_atomic_crtc_needs_modeset - compute combined modeset need
|
|
* @state: &drm_crtc_state for the CRTC
|
|
*
|
|
* To give drivers flexibility &struct drm_crtc_state has 3 booleans to track
|
|
* whether the state CRTC changed enough to need a full modeset cycle:
|
|
* mode_changed, active_changed and connectors_changed. This helper simply
|
|
* combines these three to compute the overall need for a modeset for @state.
|
|
*
|
|
* The atomic helper code sets these booleans, but drivers can and should
|
|
* change them appropriately to accurately represent whether a modeset is
|
|
* really needed. In general, drivers should avoid full modesets whenever
|
|
* possible.
|
|
*
|
|
* For example if the CRTC mode has changed, and the hardware is able to enact
|
|
* the requested mode change without going through a full modeset, the driver
|
|
* should clear mode_changed in its &drm_mode_config_funcs.atomic_check
|
|
* implementation.
|
|
*/
|
|
static inline bool
|
|
drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state)
|
|
{
|
|
return state->mode_changed || state->active_changed ||
|
|
state->connectors_changed;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_crtc_effectively_active - compute whether CRTC is actually active
|
|
* @state: &drm_crtc_state for the CRTC
|
|
*
|
|
* When in self refresh mode, the crtc_state->active value will be false, since
|
|
* the CRTC is off. However in some cases we're interested in whether the CRTC
|
|
* is active, or effectively active (ie: it's connected to an active display).
|
|
* In these cases, use this function instead of just checking active.
|
|
*/
|
|
static inline bool
|
|
drm_atomic_crtc_effectively_active(const struct drm_crtc_state *state)
|
|
{
|
|
return state->active || state->self_refresh_active;
|
|
}
|
|
|
|
/**
|
|
* struct drm_bus_cfg - bus configuration
|
|
*
|
|
* This structure stores the configuration of a physical bus between two
|
|
* components in an output pipeline, usually between two bridges, an encoder
|
|
* and a bridge, or a bridge and a connector.
|
|
*
|
|
* The bus configuration is stored in &drm_bridge_state separately for the
|
|
* input and output buses, as seen from the point of view of each bridge. The
|
|
* bus configuration of a bridge output is usually identical to the
|
|
* configuration of the next bridge's input, but may differ if the signals are
|
|
* modified between the two bridges, for instance by an inverter on the board.
|
|
* The input and output configurations of a bridge may differ if the bridge
|
|
* modifies the signals internally, for instance by performing format
|
|
* conversion, or modifying signals polarities.
|
|
*/
|
|
struct drm_bus_cfg {
|
|
/**
|
|
* @format: format used on this bus (one of the MEDIA_BUS_FMT_* format)
|
|
*
|
|
* This field should not be directly modified by drivers
|
|
* (drm_atomic_bridge_chain_select_bus_fmts() takes care of the bus
|
|
* format negotiation).
|
|
*/
|
|
u32 format;
|
|
|
|
/**
|
|
* @flags: DRM_BUS_* flags used on this bus
|
|
*/
|
|
u32 flags;
|
|
};
|
|
|
|
/**
|
|
* struct drm_bridge_state - Atomic bridge state object
|
|
*/
|
|
struct drm_bridge_state {
|
|
/**
|
|
* @base: inherit from &drm_private_state
|
|
*/
|
|
struct drm_private_state base;
|
|
|
|
/**
|
|
* @bridge: the bridge this state refers to
|
|
*/
|
|
struct drm_bridge *bridge;
|
|
|
|
/**
|
|
* @input_bus_cfg: input bus configuration
|
|
*/
|
|
struct drm_bus_cfg input_bus_cfg;
|
|
|
|
/**
|
|
* @output_bus_cfg: input bus configuration
|
|
*/
|
|
struct drm_bus_cfg output_bus_cfg;
|
|
};
|
|
|
|
static inline struct drm_bridge_state *
|
|
drm_priv_to_bridge_state(struct drm_private_state *priv)
|
|
{
|
|
return container_of(priv, struct drm_bridge_state, base);
|
|
}
|
|
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_bridge_state(struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge);
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge);
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_new_bridge_state(const struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge);
|
|
|
|
#endif /* DRM_ATOMIC_H_ */
|