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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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6ddd388ab2
Chasing plane->state->crtc of planes that are *not* part of the same atomic update is racy, making it incredibly awkward (or impossible) to do something simple like iterate over all planes and figure out which ones are attached to a crtc. Solve this by adding a bitmask of currently attached planes in the crtc-state. Note that the transitional helpers do not maintain the plane_mask. But they only support the legacy ioctls, which have sufficient brute-force locking around plane updates that they can continue to loop over all planes to see what is attached to a crtc the old way. Signed-off-by: Rob Clark <robdclark@gmail.com> [danvet: - Drop comments about locking in set_crtc_for_plane since they're a bit misleading - we already should hold lock for the current crtc. - Also WARN_ON if get_state on the old crtc fails since that should have been done already. - Squash in fixup to check get_plane_state return value, reported by Dan Carpenter and acked by Rob Clark.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
69 lines
2.7 KiB
C
69 lines
2.7 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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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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void drm_atomic_state_free(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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int __must_check
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drm_atomic_set_crtc_for_plane(struct drm_atomic_state *state,
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struct drm_plane *plane, struct drm_crtc *crtc);
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void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
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struct drm_framebuffer *fb);
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int __must_check
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drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
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struct drm_crtc *crtc);
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int __must_check
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drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
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struct drm_crtc *crtc);
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int
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drm_atomic_connectors_for_crtc(struct drm_atomic_state *state,
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struct drm_crtc *crtc);
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void drm_atomic_legacy_backoff(struct drm_atomic_state *state);
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int __must_check drm_atomic_check_only(struct drm_atomic_state *state);
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int __must_check drm_atomic_commit(struct drm_atomic_state *state);
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int __must_check drm_atomic_async_commit(struct drm_atomic_state *state);
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#endif /* DRM_ATOMIC_H_ */
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