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 /*
38  * Drivers that don't allow primary plane scaling may pass this macro in place
39  * of the min/max scale parameters of the plane-state checker function.
40  *
41  * Due to src being in 16.16 fixed point and dest being in integer pixels,
42  * 1<<16 represents no scaling.
43  */
44 #define DRM_PLANE_NO_SCALING (1<<16)
45 
46 struct drm_atomic_state;
47 struct drm_private_obj;
48 struct drm_private_state;
49 
50 int drm_atomic_helper_check_modeset(struct drm_device *dev,
51 				struct drm_atomic_state *state);
52 int
53 drm_atomic_helper_check_wb_encoder_state(struct drm_encoder *encoder,
54 					 struct drm_connector_state *conn_state);
55 int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
56 					const struct drm_crtc_state *crtc_state,
57 					int min_scale,
58 					int max_scale,
59 					bool can_position,
60 					bool can_update_disabled);
61 int drm_atomic_helper_check_crtc_state(struct drm_crtc_state *crtc_state,
62 				       bool can_disable_primary_plane);
63 int drm_atomic_helper_check_planes(struct drm_device *dev,
64 			       struct drm_atomic_state *state);
65 int drm_atomic_helper_check(struct drm_device *dev,
66 			    struct drm_atomic_state *state);
67 void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
68 void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *state);
69 int drm_atomic_helper_commit(struct drm_device *dev,
70 			     struct drm_atomic_state *state,
71 			     bool nonblock);
72 int drm_atomic_helper_async_check(struct drm_device *dev,
73 				  struct drm_atomic_state *state);
74 void drm_atomic_helper_async_commit(struct drm_device *dev,
75 				    struct drm_atomic_state *state);
76 
77 int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
78 					struct drm_atomic_state *state,
79 					bool pre_swap);
80 
81 void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
82 					struct drm_atomic_state *old_state);
83 
84 void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
85 					  struct drm_atomic_state *old_state);
86 
87 void
88 drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
89 					      struct drm_atomic_state *old_state);
90 
91 void
92 drm_atomic_helper_calc_timestamping_constants(struct drm_atomic_state *state);
93 
94 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
95 					       struct drm_atomic_state *state);
96 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
97 					  struct drm_atomic_state *old_state);
98 
99 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
100 				     struct drm_atomic_state *state);
101 
102 #define DRM_PLANE_COMMIT_ACTIVE_ONLY			BIT(0)
103 #define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET	BIT(1)
104 
105 void drm_atomic_helper_commit_planes(struct drm_device *dev,
106 				     struct drm_atomic_state *state,
107 				     uint32_t flags);
108 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
109 				      struct drm_atomic_state *old_state);
110 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
111 void
112 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
113 					 bool atomic);
114 
115 int __must_check drm_atomic_helper_swap_state(struct drm_atomic_state *state,
116 					      bool stall);
117 
118 /* nonblocking commit helpers */
119 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
120 				   bool nonblock);
121 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
122 void drm_atomic_helper_fake_vblank(struct drm_atomic_state *state);
123 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
124 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
125 
126 /* implementations for legacy interfaces */
127 int drm_atomic_helper_update_plane(struct drm_plane *plane,
128 				   struct drm_crtc *crtc,
129 				   struct drm_framebuffer *fb,
130 				   int crtc_x, int crtc_y,
131 				   unsigned int crtc_w, unsigned int crtc_h,
132 				   uint32_t src_x, uint32_t src_y,
133 				   uint32_t src_w, uint32_t src_h,
134 				   struct drm_modeset_acquire_ctx *ctx);
135 int drm_atomic_helper_disable_plane(struct drm_plane *plane,
136 				    struct drm_modeset_acquire_ctx *ctx);
137 int drm_atomic_helper_set_config(struct drm_mode_set *set,
138 				 struct drm_modeset_acquire_ctx *ctx);
139 
140 int drm_atomic_helper_disable_all(struct drm_device *dev,
141 				  struct drm_modeset_acquire_ctx *ctx);
142 void drm_atomic_helper_shutdown(struct drm_device *dev);
143 struct drm_atomic_state *
144 drm_atomic_helper_duplicate_state(struct drm_device *dev,
145 				  struct drm_modeset_acquire_ctx *ctx);
146 struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
147 int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
148 					      struct drm_modeset_acquire_ctx *ctx);
149 int drm_atomic_helper_resume(struct drm_device *dev,
150 			     struct drm_atomic_state *state);
151 
152 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
153 				struct drm_framebuffer *fb,
154 				struct drm_pending_vblank_event *event,
155 				uint32_t flags,
156 				struct drm_modeset_acquire_ctx *ctx);
157 int drm_atomic_helper_page_flip_target(
158 				struct drm_crtc *crtc,
159 				struct drm_framebuffer *fb,
160 				struct drm_pending_vblank_event *event,
161 				uint32_t flags,
162 				uint32_t target,
163 				struct drm_modeset_acquire_ctx *ctx);
164 
165 /**
166  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
167  * @plane: the loop cursor
168  * @crtc:  the CRTC whose planes are iterated
169  *
170  * This iterates over the current state, useful (for example) when applying
171  * atomic state after it has been checked and swapped.  To iterate over the
172  * planes which *will* be attached (more useful in code called from
173  * &drm_mode_config_funcs.atomic_check) see
174  * drm_atomic_crtc_state_for_each_plane().
175  */
176 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
177 	drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
178 
179 /**
180  * drm_atomic_crtc_state_for_each_plane - iterate over attached planes in new state
181  * @plane: the loop cursor
182  * @crtc_state: the incoming CRTC state
183  *
184  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
185  * attached if the specified state is applied.  Useful during for example
186  * in code called from &drm_mode_config_funcs.atomic_check operations, to
187  * validate the incoming state.
188  */
189 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
190 	drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
191 
192 /**
193  * drm_atomic_crtc_state_for_each_plane_state - iterate over attached planes in new state
194  * @plane: the loop cursor
195  * @plane_state: loop cursor for the plane's state, must be const
196  * @crtc_state: the incoming CRTC state
197  *
198  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
199  * attached if the specified state is applied.  Useful during for example
200  * in code called from &drm_mode_config_funcs.atomic_check operations, to
201  * validate the incoming state.
202  *
203  * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
204  * const plane_state. This is useful when a driver just wants to peek at other
205  * active planes on this CRTC, but does not need to change it.
206  */
207 #define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
208 	drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
209 		for_each_if ((plane_state = \
210 			      __drm_atomic_get_current_plane_state((crtc_state)->state, \
211 								   plane)))
212 
213 /**
214  * drm_atomic_plane_disabling - check whether a plane is being disabled
215  * @old_plane_state: old atomic plane state
216  * @new_plane_state: new atomic plane state
217  *
218  * Checks the atomic state of a plane to determine whether it's being disabled
219  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
220  * need to either both be NULL or both be non-NULL).
221  *
222  * RETURNS:
223  * True if the plane is being disabled, false otherwise.
224  */
225 static inline bool
226 drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
227 			   struct drm_plane_state *new_plane_state)
228 {
229 	/*
230 	 * When disabling a plane, CRTC and FB should always be NULL together.
231 	 * Anything else should be considered a bug in the atomic core, so we
232 	 * gently warn about it.
233 	 */
234 	WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
235 		(new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
236 
237 	return old_plane_state->crtc && !new_plane_state->crtc;
238 }
239 
240 u32 *
241 drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge,
242 					struct drm_bridge_state *bridge_state,
243 					struct drm_crtc_state *crtc_state,
244 					struct drm_connector_state *conn_state,
245 					u32 output_fmt,
246 					unsigned int *num_input_fmts);
247 
248 #endif /* DRM_ATOMIC_HELPER_H_ */
249