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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; | |
e04fa803 CK |
51 | struct intel_crtc *nuclear_crtc = NULL; |
52 | struct intel_crtc_state *crtc_state = NULL; | |
5ee67f1c MR |
53 | int ret; |
54 | int i; | |
55 | bool not_nuclear = false; | |
56 | ||
57 | /* | |
58 | * FIXME: At the moment, we only support "nuclear pageflip" on a | |
59 | * single CRTC. Cross-crtc updates will be added later. | |
60 | */ | |
61 | for (i = 0; i < nplanes; i++) { | |
62 | struct intel_plane *plane = to_intel_plane(state->planes[i]); | |
63 | if (!plane) | |
64 | continue; | |
65 | ||
66 | if (nuclear_pipe == INVALID_PIPE) { | |
67 | nuclear_pipe = plane->pipe; | |
68 | } else if (nuclear_pipe != plane->pipe) { | |
69 | DRM_DEBUG_KMS("i915 only support atomic plane operations on a single CRTC at the moment\n"); | |
70 | return -EINVAL; | |
71 | } | |
72 | } | |
73 | ||
74 | /* | |
75 | * FIXME: We only handle planes for now; make sure there are no CRTC's | |
76 | * or connectors involved. | |
77 | */ | |
78 | state->allow_modeset = false; | |
79 | for (i = 0; i < ncrtcs; i++) { | |
80 | struct intel_crtc *crtc = to_intel_crtc(state->crtcs[i]); | |
f1e2daea MR |
81 | if (crtc) |
82 | memset(&crtc->atomic, 0, sizeof(crtc->atomic)); | |
5ee67f1c MR |
83 | if (crtc && crtc->pipe != nuclear_pipe) |
84 | not_nuclear = true; | |
e04fa803 CK |
85 | if (crtc && crtc->pipe == nuclear_pipe) { |
86 | nuclear_crtc = crtc; | |
87 | crtc_state = to_intel_crtc_state(state->crtc_states[i]); | |
88 | } | |
5ee67f1c MR |
89 | } |
90 | for (i = 0; i < nconnectors; i++) | |
91 | if (state->connectors[i] != NULL) | |
92 | not_nuclear = true; | |
93 | ||
94 | if (not_nuclear) { | |
95 | DRM_DEBUG_KMS("i915 only supports atomic plane operations at the moment\n"); | |
96 | return -EINVAL; | |
97 | } | |
98 | ||
99 | ret = drm_atomic_helper_check_planes(dev, state); | |
100 | if (ret) | |
101 | return ret; | |
102 | ||
e04fa803 CK |
103 | /* FIXME: move to crtc atomic check function once it is ready */ |
104 | ret = intel_atomic_setup_scalers(dev, nuclear_crtc, crtc_state); | |
105 | if (ret) | |
106 | return ret; | |
107 | ||
5ee67f1c MR |
108 | return ret; |
109 | } | |
110 | ||
111 | ||
112 | /** | |
113 | * intel_atomic_commit - commit validated state object | |
114 | * @dev: DRM device | |
115 | * @state: the top-level driver state object | |
116 | * @async: asynchronous commit | |
117 | * | |
118 | * This function commits a top-level state object that has been validated | |
119 | * with drm_atomic_helper_check(). | |
120 | * | |
121 | * FIXME: Atomic modeset support for i915 is not yet complete. At the moment | |
122 | * we can only handle plane-related operations and do not yet support | |
123 | * asynchronous commit. | |
124 | * | |
125 | * RETURNS | |
126 | * Zero for success or -errno. | |
127 | */ | |
128 | int intel_atomic_commit(struct drm_device *dev, | |
129 | struct drm_atomic_state *state, | |
130 | bool async) | |
131 | { | |
132 | int ret; | |
133 | int i; | |
134 | ||
135 | if (async) { | |
136 | DRM_DEBUG_KMS("i915 does not yet support async commit\n"); | |
137 | return -EINVAL; | |
138 | } | |
139 | ||
140 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
141 | if (ret) | |
142 | return ret; | |
143 | ||
144 | /* Point of no return */ | |
145 | ||
146 | /* | |
147 | * FIXME: The proper sequence here will eventually be: | |
148 | * | |
149 | * drm_atomic_helper_swap_state(dev, state) | |
1af434a9 | 150 | * drm_atomic_helper_commit_modeset_disables(dev, state); |
5ee67f1c | 151 | * drm_atomic_helper_commit_planes(dev, state); |
1af434a9 | 152 | * drm_atomic_helper_commit_modeset_enables(dev, state); |
5ee67f1c MR |
153 | * drm_atomic_helper_wait_for_vblanks(dev, state); |
154 | * drm_atomic_helper_cleanup_planes(dev, state); | |
155 | * drm_atomic_state_free(state); | |
156 | * | |
157 | * once we have full atomic modeset. For now, just manually update | |
158 | * plane states to avoid clobbering good states with dummy states | |
159 | * while nuclear pageflipping. | |
160 | */ | |
161 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
162 | struct drm_plane *plane = state->planes[i]; | |
163 | ||
164 | if (!plane) | |
165 | continue; | |
166 | ||
167 | plane->state->state = state; | |
168 | swap(state->plane_states[i], plane->state); | |
169 | plane->state->state = NULL; | |
170 | } | |
171 | drm_atomic_helper_commit_planes(dev, state); | |
172 | drm_atomic_helper_wait_for_vblanks(dev, state); | |
173 | drm_atomic_helper_cleanup_planes(dev, state); | |
174 | drm_atomic_state_free(state); | |
175 | ||
176 | return 0; | |
177 | } | |
2545e4a6 MR |
178 | |
179 | /** | |
180 | * intel_connector_atomic_get_property - fetch connector property value | |
181 | * @connector: connector to fetch property for | |
182 | * @state: state containing the property value | |
183 | * @property: property to look up | |
184 | * @val: pointer to write property value into | |
185 | * | |
186 | * The DRM core does not store shadow copies of properties for | |
187 | * atomic-capable drivers. This entrypoint is used to fetch | |
188 | * the current value of a driver-specific connector property. | |
189 | */ | |
190 | int | |
191 | intel_connector_atomic_get_property(struct drm_connector *connector, | |
192 | const struct drm_connector_state *state, | |
193 | struct drm_property *property, | |
194 | uint64_t *val) | |
195 | { | |
196 | int i; | |
197 | ||
198 | /* | |
199 | * TODO: We only have atomic modeset for planes at the moment, so the | |
200 | * crtc/connector code isn't quite ready yet. Until it's ready, | |
201 | * continue to look up all property values in the DRM's shadow copy | |
202 | * in obj->properties->values[]. | |
203 | * | |
204 | * When the crtc/connector state work matures, this function should | |
205 | * be updated to read the values out of the state structure instead. | |
206 | */ | |
207 | for (i = 0; i < connector->base.properties->count; i++) { | |
208 | if (connector->base.properties->properties[i] == property) { | |
209 | *val = connector->base.properties->values[i]; | |
210 | return 0; | |
211 | } | |
212 | } | |
213 | ||
214 | return -EINVAL; | |
215 | } | |
1356837e MR |
216 | |
217 | /* | |
218 | * intel_crtc_duplicate_state - duplicate crtc state | |
219 | * @crtc: drm crtc | |
220 | * | |
221 | * Allocates and returns a copy of the crtc state (both common and | |
222 | * Intel-specific) for the specified crtc. | |
223 | * | |
224 | * Returns: The newly allocated crtc state, or NULL on failure. | |
225 | */ | |
226 | struct drm_crtc_state * | |
227 | intel_crtc_duplicate_state(struct drm_crtc *crtc) | |
228 | { | |
229 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
a91572f3 | 230 | struct intel_crtc_state *crtc_state; |
1356837e MR |
231 | |
232 | if (WARN_ON(!intel_crtc->config)) | |
a91572f3 ACO |
233 | crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL); |
234 | else | |
235 | crtc_state = kmemdup(intel_crtc->config, | |
236 | sizeof(*intel_crtc->config), GFP_KERNEL); | |
1356837e | 237 | |
a91572f3 ACO |
238 | if (crtc_state) |
239 | crtc_state->base.crtc = crtc; | |
240 | ||
241 | return &crtc_state->base; | |
1356837e MR |
242 | } |
243 | ||
244 | /** | |
245 | * intel_crtc_destroy_state - destroy crtc state | |
246 | * @crtc: drm crtc | |
247 | * | |
248 | * Destroys the crtc state (both common and Intel-specific) for the | |
249 | * specified crtc. | |
250 | */ | |
251 | void | |
252 | intel_crtc_destroy_state(struct drm_crtc *crtc, | |
253 | struct drm_crtc_state *state) | |
254 | { | |
255 | drm_atomic_helper_crtc_destroy_state(crtc, state); | |
256 | } | |
d03c93d4 CK |
257 | |
258 | /** | |
259 | * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests | |
260 | * @dev: DRM device | |
261 | * @crtc: intel crtc | |
262 | * @crtc_state: incoming crtc_state to validate and setup scalers | |
263 | * | |
264 | * This function sets up scalers based on staged scaling requests for | |
265 | * a @crtc and its planes. It is called from crtc level check path. If request | |
266 | * is a supportable request, it attaches scalers to requested planes and crtc. | |
267 | * | |
268 | * This function takes into account the current scaler(s) in use by any planes | |
269 | * not being part of this atomic state | |
270 | * | |
271 | * Returns: | |
272 | * 0 - scalers were setup succesfully | |
273 | * error code - otherwise | |
274 | */ | |
275 | int intel_atomic_setup_scalers(struct drm_device *dev, | |
276 | struct intel_crtc *intel_crtc, | |
277 | struct intel_crtc_state *crtc_state) | |
278 | { | |
279 | struct drm_plane *plane = NULL; | |
280 | struct intel_plane *intel_plane; | |
281 | struct intel_plane_state *plane_state = NULL; | |
282 | struct intel_crtc_scaler_state *scaler_state; | |
283 | struct drm_atomic_state *drm_state; | |
284 | int num_scalers_need; | |
285 | int i, j; | |
286 | ||
287 | if (INTEL_INFO(dev)->gen < 9 || !intel_crtc || !crtc_state) | |
288 | return 0; | |
289 | ||
290 | scaler_state = &crtc_state->scaler_state; | |
291 | drm_state = crtc_state->base.state; | |
292 | ||
293 | num_scalers_need = hweight32(scaler_state->scaler_users); | |
294 | DRM_DEBUG_KMS("crtc_state = %p need = %d avail = %d scaler_users = 0x%x\n", | |
295 | crtc_state, num_scalers_need, intel_crtc->num_scalers, | |
296 | scaler_state->scaler_users); | |
297 | ||
298 | /* | |
299 | * High level flow: | |
300 | * - staged scaler requests are already in scaler_state->scaler_users | |
301 | * - check whether staged scaling requests can be supported | |
302 | * - add planes using scalers that aren't in current transaction | |
303 | * - assign scalers to requested users | |
304 | * - as part of plane commit, scalers will be committed | |
305 | * (i.e., either attached or detached) to respective planes in hw | |
306 | * - as part of crtc_commit, scaler will be either attached or detached | |
307 | * to crtc in hw | |
308 | */ | |
309 | ||
310 | /* fail if required scalers > available scalers */ | |
311 | if (num_scalers_need > intel_crtc->num_scalers){ | |
312 | DRM_DEBUG_KMS("Too many scaling requests %d > %d\n", | |
313 | num_scalers_need, intel_crtc->num_scalers); | |
314 | return -EINVAL; | |
315 | } | |
316 | ||
317 | /* walkthrough scaler_users bits and start assigning scalers */ | |
318 | for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) { | |
319 | int *scaler_id; | |
320 | ||
321 | /* skip if scaler not required */ | |
322 | if (!(scaler_state->scaler_users & (1 << i))) | |
323 | continue; | |
324 | ||
325 | if (i == SKL_CRTC_INDEX) { | |
326 | /* panel fitter case: assign as a crtc scaler */ | |
327 | scaler_id = &scaler_state->scaler_id; | |
328 | } else { | |
329 | if (!drm_state) | |
330 | continue; | |
331 | ||
332 | /* plane scaler case: assign as a plane scaler */ | |
333 | /* find the plane that set the bit as scaler_user */ | |
334 | plane = drm_state->planes[i]; | |
335 | ||
336 | /* | |
337 | * to enable/disable hq mode, add planes that are using scaler | |
338 | * into this transaction | |
339 | */ | |
340 | if (!plane) { | |
341 | struct drm_plane_state *state; | |
342 | plane = drm_plane_from_index(dev, i); | |
343 | state = drm_atomic_get_plane_state(drm_state, plane); | |
344 | if (IS_ERR(state)) { | |
345 | DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n", | |
346 | plane->base.id); | |
347 | return PTR_ERR(state); | |
348 | } | |
349 | } | |
350 | ||
351 | intel_plane = to_intel_plane(plane); | |
352 | ||
353 | /* plane on different crtc cannot be a scaler user of this crtc */ | |
354 | if (WARN_ON(intel_plane->pipe != intel_crtc->pipe)) { | |
355 | continue; | |
356 | } | |
357 | ||
358 | plane_state = to_intel_plane_state(drm_state->plane_states[i]); | |
359 | scaler_id = &plane_state->scaler_id; | |
360 | } | |
361 | ||
362 | if (*scaler_id < 0) { | |
363 | /* find a free scaler */ | |
364 | for (j = 0; j < intel_crtc->num_scalers; j++) { | |
365 | if (!scaler_state->scalers[j].in_use) { | |
366 | scaler_state->scalers[j].in_use = 1; | |
367 | *scaler_id = scaler_state->scalers[j].id; | |
368 | DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n", | |
369 | intel_crtc->pipe, | |
370 | i == SKL_CRTC_INDEX ? scaler_state->scaler_id : | |
371 | plane_state->scaler_id, | |
372 | i == SKL_CRTC_INDEX ? "CRTC" : "PLANE", | |
373 | i == SKL_CRTC_INDEX ? intel_crtc->base.base.id : | |
374 | plane->base.id); | |
375 | break; | |
376 | } | |
377 | } | |
378 | } | |
379 | ||
380 | if (WARN_ON(*scaler_id < 0)) { | |
381 | DRM_DEBUG_KMS("Cannot find scaler for %s:%d\n", | |
382 | i == SKL_CRTC_INDEX ? "CRTC" : "PLANE", | |
383 | i == SKL_CRTC_INDEX ? intel_crtc->base.base.id:plane->base.id); | |
384 | continue; | |
385 | } | |
386 | ||
387 | /* set scaler mode */ | |
388 | if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) { | |
389 | /* | |
390 | * when only 1 scaler is in use on either pipe A or B, | |
391 | * scaler 0 operates in high quality (HQ) mode. | |
392 | * In this case use scaler 0 to take advantage of HQ mode | |
393 | */ | |
394 | *scaler_id = 0; | |
395 | scaler_state->scalers[0].in_use = 1; | |
396 | scaler_state->scalers[0].mode = PS_SCALER_MODE_HQ; | |
397 | scaler_state->scalers[1].in_use = 0; | |
398 | } else { | |
399 | scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_DYN; | |
400 | } | |
401 | } | |
402 | ||
403 | return 0; | |
404 | } |