1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "hwc-drm-resources"
18
19 #include "drmconnector.h"
20 #include "drmcrtc.h"
21 #include "drmencoder.h"
22 #include "drmeventlistener.h"
23 #include "drmplane.h"
24 #include "drmresources.h"
25
26 #include <cinttypes>
27 #include <errno.h>
28 #include <fcntl.h>
29 #include <stdint.h>
30 #include <xf86drm.h>
31 #include <xf86drmMode.h>
32
33 #include <cutils/log.h>
34 #include <cutils/properties.h>
35
36 namespace android {
37
DrmResources()38 DrmResources::DrmResources() : compositor_(this), event_listener_(this) {
39 }
40
~DrmResources()41 DrmResources::~DrmResources() {
42 event_listener_.Exit();
43 }
44
Init()45 int DrmResources::Init() {
46 char path[PROPERTY_VALUE_MAX];
47 property_get("hwc.drm.device", path, "/dev/dri/card0");
48
49 /* TODO: Use drmOpenControl here instead */
50 fd_.Set(open(path, O_RDWR));
51 if (fd() < 0) {
52 ALOGE("Failed to open dri- %s", strerror(-errno));
53 return -ENODEV;
54 }
55
56 int ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
57 if (ret) {
58 ALOGE("Failed to set universal plane cap %d", ret);
59 return ret;
60 }
61
62 ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_ATOMIC, 1);
63 if (ret) {
64 ALOGE("Failed to set atomic cap %d", ret);
65 return ret;
66 }
67
68 drmModeResPtr res = drmModeGetResources(fd());
69 if (!res) {
70 ALOGE("Failed to get DrmResources resources");
71 return -ENODEV;
72 }
73
74 bool found_primary = false;
75 int display_num = 1;
76
77 for (int i = 0; !ret && i < res->count_crtcs; ++i) {
78 drmModeCrtcPtr c = drmModeGetCrtc(fd(), res->crtcs[i]);
79 if (!c) {
80 ALOGE("Failed to get crtc %d", res->crtcs[i]);
81 ret = -ENODEV;
82 break;
83 }
84
85 std::unique_ptr<DrmCrtc> crtc(new DrmCrtc(this, c, i));
86 drmModeFreeCrtc(c);
87
88 ret = crtc->Init();
89 if (ret) {
90 ALOGE("Failed to initialize crtc %d", res->crtcs[i]);
91 break;
92 }
93 crtcs_.emplace_back(std::move(crtc));
94 }
95
96 for (int i = 0; !ret && i < res->count_encoders; ++i) {
97 drmModeEncoderPtr e = drmModeGetEncoder(fd(), res->encoders[i]);
98 if (!e) {
99 ALOGE("Failed to get encoder %d", res->encoders[i]);
100 ret = -ENODEV;
101 break;
102 }
103
104 std::vector<DrmCrtc *> possible_crtcs;
105 DrmCrtc *current_crtc = NULL;
106 for (auto &crtc : crtcs_) {
107 if ((1 << crtc->pipe()) & e->possible_crtcs)
108 possible_crtcs.push_back(crtc.get());
109
110 if (crtc->id() == e->crtc_id)
111 current_crtc = crtc.get();
112 }
113
114 std::unique_ptr<DrmEncoder> enc(
115 new DrmEncoder(e, current_crtc, possible_crtcs));
116
117 drmModeFreeEncoder(e);
118
119 encoders_.emplace_back(std::move(enc));
120 }
121
122 for (int i = 0; !ret && i < res->count_connectors; ++i) {
123 drmModeConnectorPtr c = drmModeGetConnector(fd(), res->connectors[i]);
124 if (!c) {
125 ALOGE("Failed to get connector %d", res->connectors[i]);
126 ret = -ENODEV;
127 break;
128 }
129
130 std::vector<DrmEncoder *> possible_encoders;
131 DrmEncoder *current_encoder = NULL;
132 for (int j = 0; j < c->count_encoders; ++j) {
133 for (auto &encoder : encoders_) {
134 if (encoder->id() == c->encoders[j])
135 possible_encoders.push_back(encoder.get());
136 if (encoder->id() == c->encoder_id)
137 current_encoder = encoder.get();
138 }
139 }
140
141 std::unique_ptr<DrmConnector> conn(
142 new DrmConnector(this, c, current_encoder, possible_encoders));
143
144 drmModeFreeConnector(c);
145
146 ret = conn->Init();
147 if (ret) {
148 ALOGE("Init connector %d failed", res->connectors[i]);
149 break;
150 }
151
152 if (conn->built_in() && !found_primary) {
153 conn->set_display(0);
154 found_primary = true;
155 } else {
156 conn->set_display(display_num);
157 ++display_num;
158 }
159
160 connectors_.emplace_back(std::move(conn));
161 }
162 if (res)
163 drmModeFreeResources(res);
164
165 // Catch-all for the above loops
166 if (ret)
167 return ret;
168
169 drmModePlaneResPtr plane_res = drmModeGetPlaneResources(fd());
170 if (!plane_res) {
171 ALOGE("Failed to get plane resources");
172 return -ENOENT;
173 }
174
175 for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
176 drmModePlanePtr p = drmModeGetPlane(fd(), plane_res->planes[i]);
177 if (!p) {
178 ALOGE("Failed to get plane %d", plane_res->planes[i]);
179 ret = -ENODEV;
180 break;
181 }
182
183 std::unique_ptr<DrmPlane> plane(new DrmPlane(this, p));
184
185 drmModeFreePlane(p);
186
187 ret = plane->Init();
188 if (ret) {
189 ALOGE("Init plane %d failed", plane_res->planes[i]);
190 break;
191 }
192
193 planes_.emplace_back(std::move(plane));
194 }
195 drmModeFreePlaneResources(plane_res);
196 if (ret)
197 return ret;
198
199 ret = compositor_.Init();
200 if (ret)
201 return ret;
202
203 ret = event_listener_.Init();
204 if (ret) {
205 ALOGE("Can't initialize event listener %d", ret);
206 return ret;
207 }
208
209 for (auto &conn : connectors_) {
210 ret = CreateDisplayPipe(conn.get());
211 if (ret) {
212 ALOGE("Failed CreateDisplayPipe %d with %d", conn->id(), ret);
213 return ret;
214 }
215 }
216 return 0;
217 }
218
GetConnectorForDisplay(int display) const219 DrmConnector *DrmResources::GetConnectorForDisplay(int display) const {
220 for (auto &conn : connectors_) {
221 if (conn->display() == display)
222 return conn.get();
223 }
224 return NULL;
225 }
226
GetCrtcForDisplay(int display) const227 DrmCrtc *DrmResources::GetCrtcForDisplay(int display) const {
228 for (auto &crtc : crtcs_) {
229 if (crtc->display() == display)
230 return crtc.get();
231 }
232 return NULL;
233 }
234
GetPlane(uint32_t id) const235 DrmPlane *DrmResources::GetPlane(uint32_t id) const {
236 for (auto &plane : planes_) {
237 if (plane->id() == id)
238 return plane.get();
239 }
240 return NULL;
241 }
242
next_mode_id()243 uint32_t DrmResources::next_mode_id() {
244 return ++mode_id_;
245 }
246
TryEncoderForDisplay(int display,DrmEncoder * enc)247 int DrmResources::TryEncoderForDisplay(int display, DrmEncoder *enc) {
248 /* First try to use the currently-bound crtc */
249 DrmCrtc *crtc = enc->crtc();
250 if (crtc && crtc->can_bind(display)) {
251 crtc->set_display(display);
252 return 0;
253 }
254
255 /* Try to find a possible crtc which will work */
256 for (DrmCrtc *crtc : enc->possible_crtcs()) {
257 /* We've already tried this earlier */
258 if (crtc == enc->crtc())
259 continue;
260
261 if (crtc->can_bind(display)) {
262 enc->set_crtc(crtc);
263 crtc->set_display(display);
264 return 0;
265 }
266 }
267
268 /* We can't use the encoder, but nothing went wrong, try another one */
269 return -EAGAIN;
270 }
271
CreateDisplayPipe(DrmConnector * connector)272 int DrmResources::CreateDisplayPipe(DrmConnector *connector) {
273 int display = connector->display();
274 /* Try to use current setup first */
275 if (connector->encoder()) {
276 int ret = TryEncoderForDisplay(display, connector->encoder());
277 if (!ret) {
278 return 0;
279 } else if (ret != -EAGAIN) {
280 ALOGE("Could not set mode %d/%d", display, ret);
281 return ret;
282 }
283 }
284
285 for (DrmEncoder *enc : connector->possible_encoders()) {
286 int ret = TryEncoderForDisplay(display, enc);
287 if (!ret) {
288 connector->set_encoder(enc);
289 return 0;
290 } else if (ret != -EAGAIN) {
291 ALOGE("Could not set mode %d/%d", display, ret);
292 return ret;
293 }
294 }
295 ALOGE("Could not find a suitable encoder/crtc for display %d",
296 connector->display());
297 return -ENODEV;
298 }
299
CreatePropertyBlob(void * data,size_t length,uint32_t * blob_id)300 int DrmResources::CreatePropertyBlob(void *data, size_t length,
301 uint32_t *blob_id) {
302 struct drm_mode_create_blob create_blob;
303 memset(&create_blob, 0, sizeof(create_blob));
304 create_blob.length = length;
305 create_blob.data = (__u64)data;
306
307 int ret = drmIoctl(fd(), DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob);
308 if (ret) {
309 ALOGE("Failed to create mode property blob %d", ret);
310 return ret;
311 }
312 *blob_id = create_blob.blob_id;
313 return 0;
314 }
315
DestroyPropertyBlob(uint32_t blob_id)316 int DrmResources::DestroyPropertyBlob(uint32_t blob_id) {
317 if (!blob_id)
318 return 0;
319
320 struct drm_mode_destroy_blob destroy_blob;
321 memset(&destroy_blob, 0, sizeof(destroy_blob));
322 destroy_blob.blob_id = (__u32)blob_id;
323 int ret = drmIoctl(fd(), DRM_IOCTL_MODE_DESTROYPROPBLOB, &destroy_blob);
324 if (ret) {
325 ALOGE("Failed to destroy mode property blob %" PRIu32 "/%d", blob_id, ret);
326 return ret;
327 }
328 return 0;
329 }
330
SetDisplayActiveMode(int display,const DrmMode & mode)331 int DrmResources::SetDisplayActiveMode(int display, const DrmMode &mode) {
332 std::unique_ptr<DrmComposition> comp(compositor_.CreateComposition(NULL));
333 if (!comp) {
334 ALOGE("Failed to create composition for dpms on %d", display);
335 return -ENOMEM;
336 }
337 int ret = comp->SetDisplayMode(display, mode);
338 if (ret) {
339 ALOGE("Failed to add mode to composition on %d %d", display, ret);
340 return ret;
341 }
342 ret = compositor_.QueueComposition(std::move(comp));
343 if (ret) {
344 ALOGE("Failed to queue dpms composition on %d %d", display, ret);
345 return ret;
346 }
347 return 0;
348 }
349
SetDpmsMode(int display,uint64_t mode)350 int DrmResources::SetDpmsMode(int display, uint64_t mode) {
351 if (mode != DRM_MODE_DPMS_ON && mode != DRM_MODE_DPMS_OFF) {
352 ALOGE("Invalid dpms mode %" PRIu64, mode);
353 return -EINVAL;
354 }
355
356 std::unique_ptr<DrmComposition> comp(compositor_.CreateComposition(NULL));
357 if (!comp) {
358 ALOGE("Failed to create composition for dpms on %d", display);
359 return -ENOMEM;
360 }
361 int ret = comp->SetDpmsMode(display, mode);
362 if (ret) {
363 ALOGE("Failed to add dpms %" PRIu64 " to composition on %d %d", mode,
364 display, ret);
365 return ret;
366 }
367 ret = compositor_.QueueComposition(std::move(comp));
368 if (ret) {
369 ALOGE("Failed to queue dpms composition on %d %d", display, ret);
370 return ret;
371 }
372 return 0;
373 }
374
compositor()375 DrmCompositor *DrmResources::compositor() {
376 return &compositor_;
377 }
378
event_listener()379 DrmEventListener *DrmResources::event_listener() {
380 return &event_listener_;
381 }
382
GetProperty(uint32_t obj_id,uint32_t obj_type,const char * prop_name,DrmProperty * property)383 int DrmResources::GetProperty(uint32_t obj_id, uint32_t obj_type,
384 const char *prop_name, DrmProperty *property) {
385 drmModeObjectPropertiesPtr props;
386
387 props = drmModeObjectGetProperties(fd(), obj_id, obj_type);
388 if (!props) {
389 ALOGE("Failed to get properties for %d/%x", obj_id, obj_type);
390 return -ENODEV;
391 }
392
393 bool found = false;
394 for (int i = 0; !found && (size_t)i < props->count_props; ++i) {
395 drmModePropertyPtr p = drmModeGetProperty(fd(), props->props[i]);
396 if (!strcmp(p->name, prop_name)) {
397 property->Init(p, props->prop_values[i]);
398 found = true;
399 }
400 drmModeFreeProperty(p);
401 }
402
403 drmModeFreeObjectProperties(props);
404 return found ? 0 : -ENOENT;
405 }
406
GetPlaneProperty(const DrmPlane & plane,const char * prop_name,DrmProperty * property)407 int DrmResources::GetPlaneProperty(const DrmPlane &plane, const char *prop_name,
408 DrmProperty *property) {
409 return GetProperty(plane.id(), DRM_MODE_OBJECT_PLANE, prop_name, property);
410 }
411
GetCrtcProperty(const DrmCrtc & crtc,const char * prop_name,DrmProperty * property)412 int DrmResources::GetCrtcProperty(const DrmCrtc &crtc, const char *prop_name,
413 DrmProperty *property) {
414 return GetProperty(crtc.id(), DRM_MODE_OBJECT_CRTC, prop_name, property);
415 }
416
GetConnectorProperty(const DrmConnector & connector,const char * prop_name,DrmProperty * property)417 int DrmResources::GetConnectorProperty(const DrmConnector &connector,
418 const char *prop_name,
419 DrmProperty *property) {
420 return GetProperty(connector.id(), DRM_MODE_OBJECT_CONNECTOR, prop_name,
421 property);
422 }
423 }
424