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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 | ||
2545e4a6 MR |
38 | /** |
39 | * intel_connector_atomic_get_property - fetch connector property value | |
40 | * @connector: connector to fetch property for | |
41 | * @state: state containing the property value | |
42 | * @property: property to look up | |
43 | * @val: pointer to write property value into | |
44 | * | |
45 | * The DRM core does not store shadow copies of properties for | |
46 | * atomic-capable drivers. This entrypoint is used to fetch | |
47 | * the current value of a driver-specific connector property. | |
48 | */ | |
49 | int | |
50 | intel_connector_atomic_get_property(struct drm_connector *connector, | |
51 | const struct drm_connector_state *state, | |
52 | struct drm_property *property, | |
53 | uint64_t *val) | |
54 | { | |
55 | int i; | |
56 | ||
57 | /* | |
58 | * TODO: We only have atomic modeset for planes at the moment, so the | |
59 | * crtc/connector code isn't quite ready yet. Until it's ready, | |
60 | * continue to look up all property values in the DRM's shadow copy | |
61 | * in obj->properties->values[]. | |
62 | * | |
63 | * When the crtc/connector state work matures, this function should | |
64 | * be updated to read the values out of the state structure instead. | |
65 | */ | |
66 | for (i = 0; i < connector->base.properties->count; i++) { | |
67 | if (connector->base.properties->properties[i] == property) { | |
68 | *val = connector->base.properties->values[i]; | |
69 | return 0; | |
70 | } | |
71 | } | |
72 | ||
73 | return -EINVAL; | |
74 | } | |
1356837e MR |
75 | |
76 | /* | |
77 | * intel_crtc_duplicate_state - duplicate crtc state | |
78 | * @crtc: drm crtc | |
79 | * | |
80 | * Allocates and returns a copy of the crtc state (both common and | |
81 | * Intel-specific) for the specified crtc. | |
82 | * | |
83 | * Returns: The newly allocated crtc state, or NULL on failure. | |
84 | */ | |
85 | struct drm_crtc_state * | |
86 | intel_crtc_duplicate_state(struct drm_crtc *crtc) | |
87 | { | |
a91572f3 | 88 | struct intel_crtc_state *crtc_state; |
1356837e | 89 | |
f2a066f3 | 90 | crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), GFP_KERNEL); |
f0c60574 ACO |
91 | if (!crtc_state) |
92 | return NULL; | |
93 | ||
94 | __drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base); | |
95 | ||
bfd16b2a | 96 | crtc_state->update_pipe = false; |
d21fbe87 | 97 | crtc_state->disable_lp_wm = false; |
ab1d3a0e | 98 | crtc_state->disable_cxsr = false; |
92826fcd | 99 | crtc_state->wm_changed = false; |
e8861675 | 100 | crtc_state->fb_changed = false; |
bfd16b2a | 101 | |
a91572f3 | 102 | return &crtc_state->base; |
1356837e MR |
103 | } |
104 | ||
105 | /** | |
106 | * intel_crtc_destroy_state - destroy crtc state | |
107 | * @crtc: drm crtc | |
108 | * | |
109 | * Destroys the crtc state (both common and Intel-specific) for the | |
110 | * specified crtc. | |
111 | */ | |
112 | void | |
113 | intel_crtc_destroy_state(struct drm_crtc *crtc, | |
114 | struct drm_crtc_state *state) | |
115 | { | |
116 | drm_atomic_helper_crtc_destroy_state(crtc, state); | |
117 | } | |
d03c93d4 CK |
118 | |
119 | /** | |
120 | * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests | |
121 | * @dev: DRM device | |
122 | * @crtc: intel crtc | |
123 | * @crtc_state: incoming crtc_state to validate and setup scalers | |
124 | * | |
125 | * This function sets up scalers based on staged scaling requests for | |
126 | * a @crtc and its planes. It is called from crtc level check path. If request | |
127 | * is a supportable request, it attaches scalers to requested planes and crtc. | |
128 | * | |
129 | * This function takes into account the current scaler(s) in use by any planes | |
130 | * not being part of this atomic state | |
131 | * | |
132 | * Returns: | |
133 | * 0 - scalers were setup succesfully | |
134 | * error code - otherwise | |
135 | */ | |
136 | int intel_atomic_setup_scalers(struct drm_device *dev, | |
137 | struct intel_crtc *intel_crtc, | |
138 | struct intel_crtc_state *crtc_state) | |
139 | { | |
140 | struct drm_plane *plane = NULL; | |
141 | struct intel_plane *intel_plane; | |
142 | struct intel_plane_state *plane_state = NULL; | |
e435d6e5 ML |
143 | struct intel_crtc_scaler_state *scaler_state = |
144 | &crtc_state->scaler_state; | |
145 | struct drm_atomic_state *drm_state = crtc_state->base.state; | |
d03c93d4 CK |
146 | int num_scalers_need; |
147 | int i, j; | |
148 | ||
d03c93d4 | 149 | num_scalers_need = hweight32(scaler_state->scaler_users); |
d03c93d4 CK |
150 | |
151 | /* | |
152 | * High level flow: | |
153 | * - staged scaler requests are already in scaler_state->scaler_users | |
154 | * - check whether staged scaling requests can be supported | |
155 | * - add planes using scalers that aren't in current transaction | |
156 | * - assign scalers to requested users | |
157 | * - as part of plane commit, scalers will be committed | |
158 | * (i.e., either attached or detached) to respective planes in hw | |
159 | * - as part of crtc_commit, scaler will be either attached or detached | |
160 | * to crtc in hw | |
161 | */ | |
162 | ||
163 | /* fail if required scalers > available scalers */ | |
164 | if (num_scalers_need > intel_crtc->num_scalers){ | |
165 | DRM_DEBUG_KMS("Too many scaling requests %d > %d\n", | |
166 | num_scalers_need, intel_crtc->num_scalers); | |
167 | return -EINVAL; | |
168 | } | |
169 | ||
170 | /* walkthrough scaler_users bits and start assigning scalers */ | |
171 | for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) { | |
172 | int *scaler_id; | |
133b0d12 ML |
173 | const char *name; |
174 | int idx; | |
d03c93d4 CK |
175 | |
176 | /* skip if scaler not required */ | |
177 | if (!(scaler_state->scaler_users & (1 << i))) | |
178 | continue; | |
179 | ||
180 | if (i == SKL_CRTC_INDEX) { | |
133b0d12 ML |
181 | name = "CRTC"; |
182 | idx = intel_crtc->base.base.id; | |
183 | ||
d03c93d4 CK |
184 | /* panel fitter case: assign as a crtc scaler */ |
185 | scaler_id = &scaler_state->scaler_id; | |
186 | } else { | |
133b0d12 | 187 | name = "PLANE"; |
133b0d12 | 188 | |
d03c93d4 CK |
189 | /* plane scaler case: assign as a plane scaler */ |
190 | /* find the plane that set the bit as scaler_user */ | |
191 | plane = drm_state->planes[i]; | |
192 | ||
193 | /* | |
194 | * to enable/disable hq mode, add planes that are using scaler | |
195 | * into this transaction | |
196 | */ | |
197 | if (!plane) { | |
198 | struct drm_plane_state *state; | |
199 | plane = drm_plane_from_index(dev, i); | |
200 | state = drm_atomic_get_plane_state(drm_state, plane); | |
201 | if (IS_ERR(state)) { | |
202 | DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n", | |
203 | plane->base.id); | |
204 | return PTR_ERR(state); | |
205 | } | |
cf5a15be ML |
206 | |
207 | /* | |
208 | * the plane is added after plane checks are run, | |
209 | * but since this plane is unchanged just do the | |
210 | * minimum required validation. | |
211 | */ | |
cf5a15be | 212 | crtc_state->base.planes_changed = true; |
d03c93d4 CK |
213 | } |
214 | ||
215 | intel_plane = to_intel_plane(plane); | |
c07a2d11 | 216 | idx = plane->base.id; |
d03c93d4 CK |
217 | |
218 | /* plane on different crtc cannot be a scaler user of this crtc */ | |
219 | if (WARN_ON(intel_plane->pipe != intel_crtc->pipe)) { | |
220 | continue; | |
221 | } | |
222 | ||
223 | plane_state = to_intel_plane_state(drm_state->plane_states[i]); | |
224 | scaler_id = &plane_state->scaler_id; | |
225 | } | |
226 | ||
227 | if (*scaler_id < 0) { | |
228 | /* find a free scaler */ | |
229 | for (j = 0; j < intel_crtc->num_scalers; j++) { | |
230 | if (!scaler_state->scalers[j].in_use) { | |
231 | scaler_state->scalers[j].in_use = 1; | |
133b0d12 | 232 | *scaler_id = j; |
d03c93d4 | 233 | DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n", |
133b0d12 | 234 | intel_crtc->pipe, *scaler_id, name, idx); |
d03c93d4 CK |
235 | break; |
236 | } | |
237 | } | |
238 | } | |
239 | ||
240 | if (WARN_ON(*scaler_id < 0)) { | |
133b0d12 | 241 | DRM_DEBUG_KMS("Cannot find scaler for %s:%d\n", name, idx); |
d03c93d4 CK |
242 | continue; |
243 | } | |
244 | ||
245 | /* set scaler mode */ | |
246 | if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) { | |
247 | /* | |
248 | * when only 1 scaler is in use on either pipe A or B, | |
249 | * scaler 0 operates in high quality (HQ) mode. | |
250 | * In this case use scaler 0 to take advantage of HQ mode | |
251 | */ | |
252 | *scaler_id = 0; | |
253 | scaler_state->scalers[0].in_use = 1; | |
254 | scaler_state->scalers[0].mode = PS_SCALER_MODE_HQ; | |
255 | scaler_state->scalers[1].in_use = 0; | |
256 | } else { | |
257 | scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_DYN; | |
258 | } | |
259 | } | |
260 | ||
261 | return 0; | |
262 | } | |
de419ab6 | 263 | |
f7217905 | 264 | static void |
de419ab6 ML |
265 | intel_atomic_duplicate_dpll_state(struct drm_i915_private *dev_priv, |
266 | struct intel_shared_dpll_config *shared_dpll) | |
267 | { | |
268 | enum intel_dpll_id i; | |
269 | ||
270 | /* Copy shared dpll state */ | |
271 | for (i = 0; i < dev_priv->num_shared_dpll; i++) { | |
272 | struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i]; | |
273 | ||
274 | shared_dpll[i] = pll->config; | |
275 | } | |
276 | } | |
277 | ||
278 | struct intel_shared_dpll_config * | |
279 | intel_atomic_get_shared_dpll_state(struct drm_atomic_state *s) | |
280 | { | |
281 | struct intel_atomic_state *state = to_intel_atomic_state(s); | |
282 | ||
283 | WARN_ON(!drm_modeset_is_locked(&s->dev->mode_config.connection_mutex)); | |
284 | ||
285 | if (!state->dpll_set) { | |
286 | state->dpll_set = true; | |
287 | ||
288 | intel_atomic_duplicate_dpll_state(to_i915(s->dev), | |
289 | state->shared_dpll); | |
290 | } | |
291 | ||
292 | return state->shared_dpll; | |
293 | } | |
294 | ||
295 | struct drm_atomic_state * | |
296 | intel_atomic_state_alloc(struct drm_device *dev) | |
297 | { | |
298 | struct intel_atomic_state *state = kzalloc(sizeof(*state), GFP_KERNEL); | |
299 | ||
300 | if (!state || drm_atomic_state_init(dev, &state->base) < 0) { | |
301 | kfree(state); | |
302 | return NULL; | |
303 | } | |
304 | ||
305 | return &state->base; | |
306 | } | |
307 | ||
308 | void intel_atomic_state_clear(struct drm_atomic_state *s) | |
309 | { | |
310 | struct intel_atomic_state *state = to_intel_atomic_state(s); | |
311 | drm_atomic_state_default_clear(&state->base); | |
565602d7 | 312 | state->dpll_set = state->modeset = false; |
de419ab6 | 313 | } |