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 * intel_digital_connector_atomic_get_property - hook for connector->atomic_get_property.
40 * @connector: Connector to get the property for.
41 * @state: Connector state to retrieve the property from.
42 * @property: Property to retrieve.
43 * @val: Return value for the property.
44 *
45 * Returns the atomic property value for a digital connector.
46 */
intel_digital_connector_atomic_get_property(struct drm_connector * connector,const struct drm_connector_state * state,struct drm_property * property,uint64_t * val)47 int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
48 const struct drm_connector_state *state,
49 struct drm_property *property,
50 uint64_t *val)
51 {
52 struct drm_device *dev = connector->dev;
53 struct drm_i915_private *dev_priv = to_i915(dev);
54 struct intel_digital_connector_state *intel_conn_state =
55 to_intel_digital_connector_state(state);
56
57 if (property == dev_priv->force_audio_property)
58 *val = intel_conn_state->force_audio;
59 else if (property == dev_priv->broadcast_rgb_property)
60 *val = intel_conn_state->broadcast_rgb;
61 else {
62 DRM_DEBUG_ATOMIC("Unknown property %s\n", property->name);
63 return -EINVAL;
64 }
65
66 return 0;
67 }
68
69 /**
70 * intel_digital_connector_atomic_set_property - hook for connector->atomic_set_property.
71 * @connector: Connector to set the property for.
72 * @state: Connector state to set the property on.
73 * @property: Property to set.
74 * @val: New value for the property.
75 *
76 * Sets the atomic property value for a digital connector.
77 */
intel_digital_connector_atomic_set_property(struct drm_connector * connector,struct drm_connector_state * state,struct drm_property * property,uint64_t val)78 int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
79 struct drm_connector_state *state,
80 struct drm_property *property,
81 uint64_t val)
82 {
83 struct drm_device *dev = connector->dev;
84 struct drm_i915_private *dev_priv = to_i915(dev);
85 struct intel_digital_connector_state *intel_conn_state =
86 to_intel_digital_connector_state(state);
87
88 if (property == dev_priv->force_audio_property) {
89 intel_conn_state->force_audio = val;
90 return 0;
91 }
92
93 if (property == dev_priv->broadcast_rgb_property) {
94 intel_conn_state->broadcast_rgb = val;
95 return 0;
96 }
97
98 DRM_DEBUG_ATOMIC("Unknown property %s\n", property->name);
99 return -EINVAL;
100 }
101
intel_digital_connector_atomic_check(struct drm_connector * conn,struct drm_connector_state * new_state)102 int intel_digital_connector_atomic_check(struct drm_connector *conn,
103 struct drm_connector_state *new_state)
104 {
105 struct intel_digital_connector_state *new_conn_state =
106 to_intel_digital_connector_state(new_state);
107 struct drm_connector_state *old_state =
108 drm_atomic_get_old_connector_state(new_state->state, conn);
109 struct intel_digital_connector_state *old_conn_state =
110 to_intel_digital_connector_state(old_state);
111 struct drm_crtc_state *crtc_state;
112
113 if (!new_state->crtc)
114 return 0;
115
116 crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
117
118 /*
119 * These properties are handled by fastset, and might not end
120 * up in a modeset.
121 */
122 if (new_conn_state->force_audio != old_conn_state->force_audio ||
123 new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
124 new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
125 new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode)
126 crtc_state->mode_changed = true;
127
128 return 0;
129 }
130
131 /**
132 * intel_digital_connector_duplicate_state - duplicate connector state
133 * @connector: digital connector
134 *
135 * Allocates and returns a copy of the connector state (both common and
136 * digital connector specific) for the specified connector.
137 *
138 * Returns: The newly allocated connector state, or NULL on failure.
139 */
140 struct drm_connector_state *
intel_digital_connector_duplicate_state(struct drm_connector * connector)141 intel_digital_connector_duplicate_state(struct drm_connector *connector)
142 {
143 struct intel_digital_connector_state *state;
144
145 state = kmemdup(connector->state, sizeof(*state), GFP_KERNEL);
146 if (!state)
147 return NULL;
148
149 __drm_atomic_helper_connector_duplicate_state(connector, &state->base);
150 return &state->base;
151 }
152
153 /**
154 * intel_crtc_duplicate_state - duplicate crtc state
155 * @crtc: drm crtc
156 *
157 * Allocates and returns a copy of the crtc state (both common and
158 * Intel-specific) for the specified crtc.
159 *
160 * Returns: The newly allocated crtc state, or NULL on failure.
161 */
162 struct drm_crtc_state *
intel_crtc_duplicate_state(struct drm_crtc * crtc)163 intel_crtc_duplicate_state(struct drm_crtc *crtc)
164 {
165 struct intel_crtc_state *crtc_state;
166
167 crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), GFP_KERNEL);
168 if (!crtc_state)
169 return NULL;
170
171 __drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
172
173 crtc_state->update_pipe = false;
174 crtc_state->disable_lp_wm = false;
175 crtc_state->disable_cxsr = false;
176 crtc_state->update_wm_pre = false;
177 crtc_state->update_wm_post = false;
178 crtc_state->fb_changed = false;
179 crtc_state->fifo_changed = false;
180 crtc_state->wm.need_postvbl_update = false;
181 crtc_state->fb_bits = 0;
182
183 return &crtc_state->base;
184 }
185
186 /**
187 * intel_crtc_destroy_state - destroy crtc state
188 * @crtc: drm crtc
189 *
190 * Destroys the crtc state (both common and Intel-specific) for the
191 * specified crtc.
192 */
193 void
intel_crtc_destroy_state(struct drm_crtc * crtc,struct drm_crtc_state * state)194 intel_crtc_destroy_state(struct drm_crtc *crtc,
195 struct drm_crtc_state *state)
196 {
197 drm_atomic_helper_crtc_destroy_state(crtc, state);
198 }
199
200 /**
201 * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
202 * @dev_priv: i915 device
203 * @crtc: intel crtc
204 * @crtc_state: incoming crtc_state to validate and setup scalers
205 *
206 * This function sets up scalers based on staged scaling requests for
207 * a @crtc and its planes. It is called from crtc level check path. If request
208 * is a supportable request, it attaches scalers to requested planes and crtc.
209 *
210 * This function takes into account the current scaler(s) in use by any planes
211 * not being part of this atomic state
212 *
213 * Returns:
214 * 0 - scalers were setup succesfully
215 * error code - otherwise
216 */
intel_atomic_setup_scalers(struct drm_i915_private * dev_priv,struct intel_crtc * intel_crtc,struct intel_crtc_state * crtc_state)217 int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
218 struct intel_crtc *intel_crtc,
219 struct intel_crtc_state *crtc_state)
220 {
221 struct drm_plane *plane = NULL;
222 struct intel_plane *intel_plane;
223 struct intel_plane_state *plane_state = NULL;
224 struct intel_crtc_scaler_state *scaler_state =
225 &crtc_state->scaler_state;
226 struct drm_atomic_state *drm_state = crtc_state->base.state;
227 int num_scalers_need;
228 int i, j;
229
230 num_scalers_need = hweight32(scaler_state->scaler_users);
231
232 /*
233 * High level flow:
234 * - staged scaler requests are already in scaler_state->scaler_users
235 * - check whether staged scaling requests can be supported
236 * - add planes using scalers that aren't in current transaction
237 * - assign scalers to requested users
238 * - as part of plane commit, scalers will be committed
239 * (i.e., either attached or detached) to respective planes in hw
240 * - as part of crtc_commit, scaler will be either attached or detached
241 * to crtc in hw
242 */
243
244 /* fail if required scalers > available scalers */
245 if (num_scalers_need > intel_crtc->num_scalers){
246 DRM_DEBUG_KMS("Too many scaling requests %d > %d\n",
247 num_scalers_need, intel_crtc->num_scalers);
248 return -EINVAL;
249 }
250
251 /* walkthrough scaler_users bits and start assigning scalers */
252 for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
253 int *scaler_id;
254 const char *name;
255 int idx;
256
257 /* skip if scaler not required */
258 if (!(scaler_state->scaler_users & (1 << i)))
259 continue;
260
261 if (i == SKL_CRTC_INDEX) {
262 name = "CRTC";
263 idx = intel_crtc->base.base.id;
264
265 /* panel fitter case: assign as a crtc scaler */
266 scaler_id = &scaler_state->scaler_id;
267 } else {
268 name = "PLANE";
269
270 /* plane scaler case: assign as a plane scaler */
271 /* find the plane that set the bit as scaler_user */
272 plane = drm_state->planes[i].ptr;
273
274 /*
275 * to enable/disable hq mode, add planes that are using scaler
276 * into this transaction
277 */
278 if (!plane) {
279 struct drm_plane_state *state;
280 plane = drm_plane_from_index(&dev_priv->drm, i);
281 state = drm_atomic_get_plane_state(drm_state, plane);
282 if (IS_ERR(state)) {
283 DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n",
284 plane->base.id);
285 return PTR_ERR(state);
286 }
287
288 /*
289 * the plane is added after plane checks are run,
290 * but since this plane is unchanged just do the
291 * minimum required validation.
292 */
293 crtc_state->base.planes_changed = true;
294 }
295
296 intel_plane = to_intel_plane(plane);
297 idx = plane->base.id;
298
299 /* plane on different crtc cannot be a scaler user of this crtc */
300 if (WARN_ON(intel_plane->pipe != intel_crtc->pipe)) {
301 continue;
302 }
303
304 plane_state = intel_atomic_get_existing_plane_state(drm_state,
305 intel_plane);
306 scaler_id = &plane_state->scaler_id;
307 }
308
309 if (*scaler_id < 0) {
310 /* find a free scaler */
311 for (j = 0; j < intel_crtc->num_scalers; j++) {
312 if (!scaler_state->scalers[j].in_use) {
313 scaler_state->scalers[j].in_use = 1;
314 *scaler_id = j;
315 DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n",
316 intel_crtc->pipe, *scaler_id, name, idx);
317 break;
318 }
319 }
320 }
321
322 if (WARN_ON(*scaler_id < 0)) {
323 DRM_DEBUG_KMS("Cannot find scaler for %s:%d\n", name, idx);
324 continue;
325 }
326
327 /* set scaler mode */
328 if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
329 scaler_state->scalers[*scaler_id].mode = 0;
330 } else if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
331 /*
332 * when only 1 scaler is in use on either pipe A or B,
333 * scaler 0 operates in high quality (HQ) mode.
334 * In this case use scaler 0 to take advantage of HQ mode
335 */
336 *scaler_id = 0;
337 scaler_state->scalers[0].in_use = 1;
338 scaler_state->scalers[0].mode = PS_SCALER_MODE_HQ;
339 scaler_state->scalers[1].in_use = 0;
340 } else {
341 scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_DYN;
342 }
343 }
344
345 return 0;
346 }
347
348 struct drm_atomic_state *
intel_atomic_state_alloc(struct drm_device * dev)349 intel_atomic_state_alloc(struct drm_device *dev)
350 {
351 struct intel_atomic_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
352
353 if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
354 kfree(state);
355 return NULL;
356 }
357
358 return &state->base;
359 }
360
intel_atomic_state_clear(struct drm_atomic_state * s)361 void intel_atomic_state_clear(struct drm_atomic_state *s)
362 {
363 struct intel_atomic_state *state = to_intel_atomic_state(s);
364 drm_atomic_state_default_clear(&state->base);
365 state->dpll_set = state->modeset = false;
366 }
367