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
78 drm_atomic_helper_calc_timestamping_constants(struct drm_atomic_state *state);
79
80 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
81 struct drm_atomic_state *state);
82 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
83 struct drm_atomic_state *old_state);
84
85 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
86 struct drm_atomic_state *state);
87
88 #define DRM_PLANE_COMMIT_ACTIVE_ONLY BIT(0)
89 #define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET BIT(1)
90
91 void drm_atomic_helper_commit_planes(struct drm_device *dev,
92 struct drm_atomic_state *state,
93 uint32_t flags);
94 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
95 struct drm_atomic_state *old_state);
96 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
97 void
98 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
99 bool atomic);
100
101 int __must_check drm_atomic_helper_swap_state(struct drm_atomic_state *state,
102 bool stall);
103
104 /* nonblocking commit helpers */
105 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
106 bool nonblock);
107 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
108 void drm_atomic_helper_fake_vblank(struct drm_atomic_state *state);
109 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
110 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
111
112 /* implementations for legacy interfaces */
113 int drm_atomic_helper_update_plane(struct drm_plane *plane,
114 struct drm_crtc *crtc,
115 struct drm_framebuffer *fb,
116 int crtc_x, int crtc_y,
117 unsigned int crtc_w, unsigned int crtc_h,
118 uint32_t src_x, uint32_t src_y,
119 uint32_t src_w, uint32_t src_h,
120 struct drm_modeset_acquire_ctx *ctx);
121 int drm_atomic_helper_disable_plane(struct drm_plane *plane,
122 struct drm_modeset_acquire_ctx *ctx);
123 int drm_atomic_helper_set_config(struct drm_mode_set *set,
124 struct drm_modeset_acquire_ctx *ctx);
125
126 int drm_atomic_helper_disable_all(struct drm_device *dev,
127 struct drm_modeset_acquire_ctx *ctx);
128 void drm_atomic_helper_shutdown(struct drm_device *dev);
129 struct drm_atomic_state *
130 drm_atomic_helper_duplicate_state(struct drm_device *dev,
131 struct drm_modeset_acquire_ctx *ctx);
132 struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
133 int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
134 struct drm_modeset_acquire_ctx *ctx);
135 int drm_atomic_helper_resume(struct drm_device *dev,
136 struct drm_atomic_state *state);
137
138 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
139 struct drm_framebuffer *fb,
140 struct drm_pending_vblank_event *event,
141 uint32_t flags,
142 struct drm_modeset_acquire_ctx *ctx);
143 int drm_atomic_helper_page_flip_target(
144 struct drm_crtc *crtc,
145 struct drm_framebuffer *fb,
146 struct drm_pending_vblank_event *event,
147 uint32_t flags,
148 uint32_t target,
149 struct drm_modeset_acquire_ctx *ctx);
150 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
151 u16 *red, u16 *green, u16 *blue,
152 uint32_t size,
153 struct drm_modeset_acquire_ctx *ctx);
154
155 /**
156 * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
157 * @plane: the loop cursor
158 * @crtc: the CRTC whose planes are iterated
159 *
160 * This iterates over the current state, useful (for example) when applying
161 * atomic state after it has been checked and swapped. To iterate over the
162 * planes which *will* be attached (more useful in code called from
163 * &drm_mode_config_funcs.atomic_check) see
164 * drm_atomic_crtc_state_for_each_plane().
165 */
166 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
167 drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
168
169 /**
170 * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
171 * @plane: the loop cursor
172 * @crtc_state: the incoming CRTC state
173 *
174 * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
175 * attached if the specified state is applied. Useful during for example
176 * in code called from &drm_mode_config_funcs.atomic_check operations, to
177 * validate the incoming state.
178 */
179 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
180 drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
181
182 /**
183 * drm_crtc_atomic_state_for_each_plane_state - iterate over attached planes in new state
184 * @plane: the loop cursor
185 * @plane_state: loop cursor for the plane's state, must be const
186 * @crtc_state: the incoming CRTC state
187 *
188 * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
189 * attached if the specified state is applied. Useful during for example
190 * in code called from &drm_mode_config_funcs.atomic_check operations, to
191 * validate the incoming state.
192 *
193 * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
194 * const plane_state. This is useful when a driver just wants to peek at other
195 * active planes on this CRTC, but does not need to change it.
196 */
197 #define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
198 drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
199 for_each_if ((plane_state = \
200 __drm_atomic_get_current_plane_state((crtc_state)->state, \
201 plane)))
202
203 /**
204 * drm_atomic_plane_disabling - check whether a plane is being disabled
205 * @old_plane_state: old atomic plane state
206 * @new_plane_state: new atomic plane state
207 *
208 * Checks the atomic state of a plane to determine whether it's being disabled
209 * or not. This also WARNs if it detects an invalid state (both CRTC and FB
210 * need to either both be NULL or both be non-NULL).
211 *
212 * RETURNS:
213 * True if the plane is being disabled, false otherwise.
214 */
215 static inline bool
drm_atomic_plane_disabling(struct drm_plane_state * old_plane_state,struct drm_plane_state * new_plane_state)216 drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
217 struct drm_plane_state *new_plane_state)
218 {
219 /*
220 * When disabling a plane, CRTC and FB should always be NULL together.
221 * Anything else should be considered a bug in the atomic core, so we
222 * gently warn about it.
223 */
224 WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
225 (new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
226
227 return old_plane_state->crtc && !new_plane_state->crtc;
228 }
229
230 u32 *
231 drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge,
232 struct drm_bridge_state *bridge_state,
233 struct drm_crtc_state *crtc_state,
234 struct drm_connector_state *conn_state,
235 u32 output_fmt,
236 unsigned int *num_input_fmts);
237
238 #endif /* DRM_ATOMIC_HELPER_H_ */
239