1 /*
2  * Copyright (C) 2014 Red Hat
3  * Copyright (C) 2014 Intel Corp.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included in
13  * all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  * Rob Clark <robdclark@gmail.com>
25  * Daniel Vetter <daniel.vetter@ffwll.ch>
26  */
27 
28 #ifndef DRM_ATOMIC_HELPER_H_
29 #define DRM_ATOMIC_HELPER_H_
30 
31 #include <drm/drm_crtc.h>
32 #include <drm/drm_modeset_helper_vtables.h>
33 #include <drm/drm_modeset_helper.h>
34 #include <drm/drm_atomic_state_helper.h>
35 #include <drm/drm_util.h>
36 
37 struct drm_atomic_state;
38 struct drm_private_obj;
39 struct drm_private_state;
40 
41 int drm_atomic_helper_check_modeset(struct drm_device *dev,
42 				struct drm_atomic_state *state);
43 int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
44 					const struct drm_crtc_state *crtc_state,
45 					int min_scale,
46 					int max_scale,
47 					bool can_position,
48 					bool can_update_disabled);
49 int drm_atomic_helper_check_planes(struct drm_device *dev,
50 			       struct drm_atomic_state *state);
51 int drm_atomic_helper_check(struct drm_device *dev,
52 			    struct drm_atomic_state *state);
53 void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
54 void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *state);
55 int drm_atomic_helper_commit(struct drm_device *dev,
56 			     struct drm_atomic_state *state,
57 			     bool nonblock);
58 int drm_atomic_helper_async_check(struct drm_device *dev,
59 				  struct drm_atomic_state *state);
60 void drm_atomic_helper_async_commit(struct drm_device *dev,
61 				    struct drm_atomic_state *state);
62 
63 int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
64 					struct drm_atomic_state *state,
65 					bool pre_swap);
66 
67 void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
68 					struct drm_atomic_state *old_state);
69 
70 void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
71 					  struct drm_atomic_state *old_state);
72 
73 void
74 drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
75 					      struct drm_atomic_state *old_state);
76 
77 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
78 					       struct drm_atomic_state *state);
79 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
80 					  struct drm_atomic_state *old_state);
81 
82 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
83 				     struct drm_atomic_state *state);
84 
85 #define DRM_PLANE_COMMIT_ACTIVE_ONLY			BIT(0)
86 #define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET	BIT(1)
87 
88 void drm_atomic_helper_commit_planes(struct drm_device *dev,
89 				     struct drm_atomic_state *state,
90 				     uint32_t flags);
91 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
92 				      struct drm_atomic_state *old_state);
93 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
94 void
95 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
96 					 bool atomic);
97 
98 int __must_check drm_atomic_helper_swap_state(struct drm_atomic_state *state,
99 					      bool stall);
100 
101 /* nonblocking commit helpers */
102 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
103 				   bool nonblock);
104 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
105 void drm_atomic_helper_fake_vblank(struct drm_atomic_state *state);
106 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
107 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
108 
109 /* implementations for legacy interfaces */
110 int drm_atomic_helper_update_plane(struct drm_plane *plane,
111 				   struct drm_crtc *crtc,
112 				   struct drm_framebuffer *fb,
113 				   int crtc_x, int crtc_y,
114 				   unsigned int crtc_w, unsigned int crtc_h,
115 				   uint32_t src_x, uint32_t src_y,
116 				   uint32_t src_w, uint32_t src_h,
117 				   struct drm_modeset_acquire_ctx *ctx);
118 int drm_atomic_helper_disable_plane(struct drm_plane *plane,
119 				    struct drm_modeset_acquire_ctx *ctx);
120 int drm_atomic_helper_set_config(struct drm_mode_set *set,
121 				 struct drm_modeset_acquire_ctx *ctx);
122 
123 int drm_atomic_helper_disable_all(struct drm_device *dev,
124 				  struct drm_modeset_acquire_ctx *ctx);
125 void drm_atomic_helper_shutdown(struct drm_device *dev);
126 struct drm_atomic_state *
127 drm_atomic_helper_duplicate_state(struct drm_device *dev,
128 				  struct drm_modeset_acquire_ctx *ctx);
129 struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
130 int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
131 					      struct drm_modeset_acquire_ctx *ctx);
132 int drm_atomic_helper_resume(struct drm_device *dev,
133 			     struct drm_atomic_state *state);
134 
135 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
136 				struct drm_framebuffer *fb,
137 				struct drm_pending_vblank_event *event,
138 				uint32_t flags,
139 				struct drm_modeset_acquire_ctx *ctx);
140 int drm_atomic_helper_page_flip_target(
141 				struct drm_crtc *crtc,
142 				struct drm_framebuffer *fb,
143 				struct drm_pending_vblank_event *event,
144 				uint32_t flags,
145 				uint32_t target,
146 				struct drm_modeset_acquire_ctx *ctx);
147 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
148 				       u16 *red, u16 *green, u16 *blue,
149 				       uint32_t size,
150 				       struct drm_modeset_acquire_ctx *ctx);
151 
152 /**
153  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
154  * @plane: the loop cursor
155  * @crtc:  the CRTC whose planes are iterated
156  *
157  * This iterates over the current state, useful (for example) when applying
158  * atomic state after it has been checked and swapped.  To iterate over the
159  * planes which *will* be attached (more useful in code called from
160  * &drm_mode_config_funcs.atomic_check) see
161  * drm_atomic_crtc_state_for_each_plane().
162  */
163 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
164 	drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
165 
166 /**
167  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
168  * @plane: the loop cursor
169  * @crtc_state: the incoming CRTC state
170  *
171  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
172  * attached if the specified state is applied.  Useful during for example
173  * in code called from &drm_mode_config_funcs.atomic_check operations, to
174  * validate the incoming state.
175  */
176 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
177 	drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
178 
179 /**
180  * drm_crtc_atomic_state_for_each_plane_state - iterate over attached planes in new state
181  * @plane: the loop cursor
182  * @plane_state: loop cursor for the plane's state, must be const
183  * @crtc_state: the incoming CRTC state
184  *
185  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
186  * attached if the specified state is applied.  Useful during for example
187  * in code called from &drm_mode_config_funcs.atomic_check operations, to
188  * validate the incoming state.
189  *
190  * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
191  * const plane_state. This is useful when a driver just wants to peek at other
192  * active planes on this CRTC, but does not need to change it.
193  */
194 #define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
195 	drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
196 		for_each_if ((plane_state = \
197 			      __drm_atomic_get_current_plane_state((crtc_state)->state, \
198 								   plane)))
199 
200 /**
201  * drm_atomic_plane_disabling - check whether a plane is being disabled
202  * @old_plane_state: old atomic plane state
203  * @new_plane_state: new atomic plane state
204  *
205  * Checks the atomic state of a plane to determine whether it's being disabled
206  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
207  * need to either both be NULL or both be non-NULL).
208  *
209  * RETURNS:
210  * True if the plane is being disabled, false otherwise.
211  */
212 static inline bool
213 drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
214 			   struct drm_plane_state *new_plane_state)
215 {
216 	/*
217 	 * When disabling a plane, CRTC and FB should always be NULL together.
218 	 * Anything else should be considered a bug in the atomic core, so we
219 	 * gently warn about it.
220 	 */
221 	WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
222 		(new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
223 
224 	return old_plane_state->crtc && !new_plane_state->crtc;
225 }
226 
227 #endif /* DRM_ATOMIC_HELPER_H_ */
228