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5ee67f1c MR |
1 | /* |
2 | * Copyright © 2015 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | */ | |
23 | ||
24 | /** | |
25 | * DOC: atomic modeset support | |
26 | * | |
27 | * The functions here implement the state management and hardware programming | |
28 | * dispatch required by the atomic modeset infrastructure. | |
29 | * See intel_atomic_plane.c for the plane-specific atomic functionality. | |
30 | */ | |
31 | ||
32 | #include <drm/drmP.h> | |
33 | #include <drm/drm_atomic.h> | |
34 | #include <drm/drm_atomic_helper.h> | |
35 | #include <drm/drm_plane_helper.h> | |
36 | #include "intel_drv.h" | |
37 | ||
38 | ||
39 | /** | |
40 | * intel_atomic_check - validate state object | |
41 | * @dev: drm device | |
42 | * @state: state to validate | |
43 | */ | |
44 | int intel_atomic_check(struct drm_device *dev, | |
45 | struct drm_atomic_state *state) | |
46 | { | |
47 | int nplanes = dev->mode_config.num_total_plane; | |
48 | int ncrtcs = dev->mode_config.num_crtc; | |
49 | int nconnectors = dev->mode_config.num_connector; | |
50 | enum pipe nuclear_pipe = INVALID_PIPE; | |
51 | int ret; | |
52 | int i; | |
53 | bool not_nuclear = false; | |
54 | ||
55 | /* | |
56 | * FIXME: At the moment, we only support "nuclear pageflip" on a | |
57 | * single CRTC. Cross-crtc updates will be added later. | |
58 | */ | |
59 | for (i = 0; i < nplanes; i++) { | |
60 | struct intel_plane *plane = to_intel_plane(state->planes[i]); | |
61 | if (!plane) | |
62 | continue; | |
63 | ||
64 | if (nuclear_pipe == INVALID_PIPE) { | |
65 | nuclear_pipe = plane->pipe; | |
66 | } else if (nuclear_pipe != plane->pipe) { | |
67 | DRM_DEBUG_KMS("i915 only support atomic plane operations on a single CRTC at the moment\n"); | |
68 | return -EINVAL; | |
69 | } | |
70 | } | |
71 | ||
72 | /* | |
73 | * FIXME: We only handle planes for now; make sure there are no CRTC's | |
74 | * or connectors involved. | |
75 | */ | |
76 | state->allow_modeset = false; | |
77 | for (i = 0; i < ncrtcs; i++) { | |
78 | struct intel_crtc *crtc = to_intel_crtc(state->crtcs[i]); | |
79 | if (crtc && crtc->pipe != nuclear_pipe) | |
80 | not_nuclear = true; | |
81 | } | |
82 | for (i = 0; i < nconnectors; i++) | |
83 | if (state->connectors[i] != NULL) | |
84 | not_nuclear = true; | |
85 | ||
86 | if (not_nuclear) { | |
87 | DRM_DEBUG_KMS("i915 only supports atomic plane operations at the moment\n"); | |
88 | return -EINVAL; | |
89 | } | |
90 | ||
91 | ret = drm_atomic_helper_check_planes(dev, state); | |
92 | if (ret) | |
93 | return ret; | |
94 | ||
95 | return ret; | |
96 | } | |
97 | ||
98 | ||
99 | /** | |
100 | * intel_atomic_commit - commit validated state object | |
101 | * @dev: DRM device | |
102 | * @state: the top-level driver state object | |
103 | * @async: asynchronous commit | |
104 | * | |
105 | * This function commits a top-level state object that has been validated | |
106 | * with drm_atomic_helper_check(). | |
107 | * | |
108 | * FIXME: Atomic modeset support for i915 is not yet complete. At the moment | |
109 | * we can only handle plane-related operations and do not yet support | |
110 | * asynchronous commit. | |
111 | * | |
112 | * RETURNS | |
113 | * Zero for success or -errno. | |
114 | */ | |
115 | int intel_atomic_commit(struct drm_device *dev, | |
116 | struct drm_atomic_state *state, | |
117 | bool async) | |
118 | { | |
119 | int ret; | |
120 | int i; | |
121 | ||
122 | if (async) { | |
123 | DRM_DEBUG_KMS("i915 does not yet support async commit\n"); | |
124 | return -EINVAL; | |
125 | } | |
126 | ||
127 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
128 | if (ret) | |
129 | return ret; | |
130 | ||
131 | /* Point of no return */ | |
132 | ||
133 | /* | |
134 | * FIXME: The proper sequence here will eventually be: | |
135 | * | |
136 | * drm_atomic_helper_swap_state(dev, state) | |
137 | * drm_atomic_helper_commit_pre_planes(dev, state); | |
138 | * drm_atomic_helper_commit_planes(dev, state); | |
139 | * drm_atomic_helper_commit_post_planes(dev, state); | |
140 | * drm_atomic_helper_wait_for_vblanks(dev, state); | |
141 | * drm_atomic_helper_cleanup_planes(dev, state); | |
142 | * drm_atomic_state_free(state); | |
143 | * | |
144 | * once we have full atomic modeset. For now, just manually update | |
145 | * plane states to avoid clobbering good states with dummy states | |
146 | * while nuclear pageflipping. | |
147 | */ | |
148 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
149 | struct drm_plane *plane = state->planes[i]; | |
150 | ||
151 | if (!plane) | |
152 | continue; | |
153 | ||
154 | plane->state->state = state; | |
155 | swap(state->plane_states[i], plane->state); | |
156 | plane->state->state = NULL; | |
157 | } | |
158 | drm_atomic_helper_commit_planes(dev, state); | |
159 | drm_atomic_helper_wait_for_vblanks(dev, state); | |
160 | drm_atomic_helper_cleanup_planes(dev, state); | |
161 | drm_atomic_state_free(state); | |
162 | ||
163 | return 0; | |
164 | } | |
2545e4a6 MR |
165 | |
166 | /** | |
167 | * intel_connector_atomic_get_property - fetch connector property value | |
168 | * @connector: connector to fetch property for | |
169 | * @state: state containing the property value | |
170 | * @property: property to look up | |
171 | * @val: pointer to write property value into | |
172 | * | |
173 | * The DRM core does not store shadow copies of properties for | |
174 | * atomic-capable drivers. This entrypoint is used to fetch | |
175 | * the current value of a driver-specific connector property. | |
176 | */ | |
177 | int | |
178 | intel_connector_atomic_get_property(struct drm_connector *connector, | |
179 | const struct drm_connector_state *state, | |
180 | struct drm_property *property, | |
181 | uint64_t *val) | |
182 | { | |
183 | int i; | |
184 | ||
185 | /* | |
186 | * TODO: We only have atomic modeset for planes at the moment, so the | |
187 | * crtc/connector code isn't quite ready yet. Until it's ready, | |
188 | * continue to look up all property values in the DRM's shadow copy | |
189 | * in obj->properties->values[]. | |
190 | * | |
191 | * When the crtc/connector state work matures, this function should | |
192 | * be updated to read the values out of the state structure instead. | |
193 | */ | |
194 | for (i = 0; i < connector->base.properties->count; i++) { | |
195 | if (connector->base.properties->properties[i] == property) { | |
196 | *val = connector->base.properties->values[i]; | |
197 | return 0; | |
198 | } | |
199 | } | |
200 | ||
201 | return -EINVAL; | |
202 | } | |
1356837e MR |
203 | |
204 | /* | |
205 | * intel_crtc_duplicate_state - duplicate crtc state | |
206 | * @crtc: drm crtc | |
207 | * | |
208 | * Allocates and returns a copy of the crtc state (both common and | |
209 | * Intel-specific) for the specified crtc. | |
210 | * | |
211 | * Returns: The newly allocated crtc state, or NULL on failure. | |
212 | */ | |
213 | struct drm_crtc_state * | |
214 | intel_crtc_duplicate_state(struct drm_crtc *crtc) | |
215 | { | |
216 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
217 | ||
218 | if (WARN_ON(!intel_crtc->config)) | |
219 | return kzalloc(sizeof(*intel_crtc->config), GFP_KERNEL); | |
220 | ||
221 | return kmemdup(intel_crtc->config, sizeof(*intel_crtc->config), | |
222 | GFP_KERNEL); | |
223 | } | |
224 | ||
225 | /** | |
226 | * intel_crtc_destroy_state - destroy crtc state | |
227 | * @crtc: drm crtc | |
228 | * | |
229 | * Destroys the crtc state (both common and Intel-specific) for the | |
230 | * specified crtc. | |
231 | */ | |
232 | void | |
233 | intel_crtc_destroy_state(struct drm_crtc *crtc, | |
234 | struct drm_crtc_state *state) | |
235 | { | |
236 | drm_atomic_helper_crtc_destroy_state(crtc, state); | |
237 | } |