2 * Copyright (C) 2015 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #define LOG_TAG "hwc-drm-device"
19 #include "DrmDevice.h"
23 #include <xf86drmMode.h>
33 #include "utils/log.h"
34 #include "utils/properties.h"
36 static void trim_left(std::string *str) {
37 str->erase(std::begin(*str),
38 std::find_if(std::begin(*str), std::end(*str),
39 [](int ch) { return std::isspace(ch) == 0; }));
42 static void trim_right(std::string *str) {
43 str->erase(std::find_if(std::rbegin(*str), std::rend(*str),
44 [](int ch) { return std::isspace(ch) == 0; })
49 static void trim(std::string *str) {
56 static std::vector<std::string> read_primary_display_order_prop() {
57 std::array<char, PROPERTY_VALUE_MAX> display_order_buf{};
58 property_get("vendor.hwc.drm.primary_display_order", display_order_buf.data(),
61 std::vector<std::string> display_order;
62 std::istringstream str(display_order_buf.data());
63 for (std::string conn_name; std::getline(str, conn_name, ',');) {
65 display_order.push_back(std::move(conn_name));
70 static std::vector<DrmConnector *> make_primary_display_candidates(
71 const std::vector<std::unique_ptr<DrmConnector>> &connectors) {
72 std::vector<DrmConnector *> primary_candidates;
73 std::transform(std::begin(connectors), std::end(connectors),
74 std::back_inserter(primary_candidates),
75 [](const std::unique_ptr<DrmConnector> &conn) {
78 primary_candidates.erase(std::remove_if(std::begin(primary_candidates),
79 std::end(primary_candidates),
80 [](const DrmConnector *conn) {
81 return conn->state() !=
84 std::end(primary_candidates));
86 std::vector<std::string> display_order = read_primary_display_order_prop();
87 bool use_other = display_order.back() == "...";
89 // putting connectors from primary_display_order first
90 auto curr_connector = std::begin(primary_candidates);
91 for (const std::string &display_name : display_order) {
92 auto it = std::find_if(std::begin(primary_candidates),
93 std::end(primary_candidates),
94 [&display_name](const DrmConnector *conn) {
95 return conn->name() == display_name;
97 if (it != std::end(primary_candidates)) {
98 std::iter_swap(it, curr_connector);
104 // then putting internal connectors second, everything else afterwards
105 std::partition(curr_connector, std::end(primary_candidates),
106 [](const DrmConnector *conn) { return conn->internal(); });
108 primary_candidates.erase(curr_connector, std::end(primary_candidates));
111 return primary_candidates;
114 DrmDevice::DrmDevice() : event_listener_(this) {
116 mDrmFbImporter = std::make_unique<DrmFbImporter>(self);
119 DrmDevice::~DrmDevice() {
120 event_listener_.Exit();
123 std::tuple<int, int> DrmDevice::Init(const char *path, int num_displays) {
124 /* TODO: Use drmOpenControl here instead */
125 fd_ = UniqueFd(open(path, O_RDWR | O_CLOEXEC));
127 ALOGE("Failed to open dri %s: %s", path, strerror(errno));
128 return std::make_tuple(-ENODEV, 0);
131 int ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
133 ALOGE("Failed to set universal plane cap %d", ret);
134 return std::make_tuple(ret, 0);
137 ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_ATOMIC, 1);
139 ALOGE("Failed to set atomic cap %d", ret);
140 return std::make_tuple(ret, 0);
143 #ifdef DRM_CLIENT_CAP_WRITEBACK_CONNECTORS
144 ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_WRITEBACK_CONNECTORS, 1);
146 ALOGI("Failed to set writeback cap %d", ret);
151 uint64_t cap_value = 0;
152 if (drmGetCap(fd(), DRM_CAP_ADDFB2_MODIFIERS, &cap_value)) {
153 ALOGW("drmGetCap failed. Fallback to no modifier support.");
156 HasAddFb2ModifiersSupport_ = cap_value != 0;
159 if (!drmIsMaster(fd())) {
160 ALOGE("DRM/KMS master access required");
161 return std::make_tuple(-EACCES, 0);
164 auto res = MakeDrmModeResUnique(fd());
166 ALOGE("Failed to get DrmDevice resources");
167 return std::make_tuple(-ENODEV, 0);
170 min_resolution_ = std::pair<uint32_t, uint32_t>(res->min_width,
172 max_resolution_ = std::pair<uint32_t, uint32_t>(res->max_width,
175 // Assumes that the primary display will always be in the first
176 // drm_device opened.
177 bool found_primary = num_displays != 0;
179 for (int i = 0; !ret && i < res->count_crtcs; ++i) {
180 auto c = MakeDrmModeCrtcUnique(fd(), res->crtcs[i]);
182 ALOGE("Failed to get crtc %d", res->crtcs[i]);
187 std::unique_ptr<DrmCrtc> crtc(new DrmCrtc(this, c.get(), i));
191 ALOGE("Failed to initialize crtc %d", res->crtcs[i]);
194 crtcs_.emplace_back(std::move(crtc));
197 std::vector<uint32_t> possible_clones;
198 for (int i = 0; !ret && i < res->count_encoders; ++i) {
199 auto e = MakeDrmModeEncoderUnique(fd(), res->encoders[i]);
201 ALOGE("Failed to get encoder %d", res->encoders[i]);
206 std::vector<DrmCrtc *> possible_crtcs;
207 DrmCrtc *current_crtc = nullptr;
208 for (auto &crtc : crtcs_) {
209 if ((1 << crtc->pipe()) & e->possible_crtcs)
210 possible_crtcs.push_back(crtc.get());
212 if (crtc->id() == e->crtc_id)
213 current_crtc = crtc.get();
216 std::unique_ptr<DrmEncoder> enc(
217 new DrmEncoder(e.get(), current_crtc, possible_crtcs));
218 possible_clones.push_back(e->possible_clones);
220 encoders_.emplace_back(std::move(enc));
223 for (unsigned int i = 0; i < encoders_.size(); i++) {
224 for (unsigned int j = 0; j < encoders_.size(); j++)
225 if (possible_clones[i] & (1 << j))
226 encoders_[i]->AddPossibleClone(encoders_[j].get());
229 for (int i = 0; !ret && i < res->count_connectors; ++i) {
230 auto c = MakeDrmModeConnectorUnique(fd(), res->connectors[i]);
232 ALOGE("Failed to get connector %d", res->connectors[i]);
237 std::vector<DrmEncoder *> possible_encoders;
238 DrmEncoder *current_encoder = nullptr;
239 for (int j = 0; j < c->count_encoders; ++j) {
240 for (auto &encoder : encoders_) {
241 if (encoder->id() == c->encoders[j])
242 possible_encoders.push_back(encoder.get());
243 if (encoder->id() == c->encoder_id)
244 current_encoder = encoder.get();
248 std::unique_ptr<DrmConnector> conn(
249 new DrmConnector(this, c.get(), current_encoder, possible_encoders));
253 ALOGE("Init connector %d failed", res->connectors[i]);
257 if (conn->writeback())
258 writeback_connectors_.emplace_back(std::move(conn));
260 connectors_.emplace_back(std::move(conn));
263 // Primary display priority:
264 // 1) vendor.hwc.drm.primary_display_order property
265 // 2) internal connectors
267 std::vector<DrmConnector *>
268 primary_candidates = make_primary_display_candidates(connectors_);
269 if (!primary_candidates.empty() && !found_primary) {
270 DrmConnector &conn = **std::begin(primary_candidates);
271 conn.set_display(num_displays);
272 displays_[num_displays] = num_displays;
274 found_primary = true;
277 "Failed to find primary display from "
278 "\"vendor.hwc.drm.primary_display_order\" property");
281 // If no priority display were found then pick first available as primary and
282 // for the others assign consecutive display_numbers.
283 for (auto &conn : connectors_) {
284 if (conn->external() || conn->internal()) {
285 if (!found_primary) {
286 conn->set_display(num_displays);
287 displays_[num_displays] = num_displays;
288 found_primary = true;
290 } else if (conn->display() < 0) {
291 conn->set_display(num_displays);
292 displays_[num_displays] = num_displays;
298 // Catch-all for the above loops
300 return std::make_tuple(ret, 0);
302 auto plane_res = MakeDrmModePlaneResUnique(fd());
304 ALOGE("Failed to get plane resources");
305 return std::make_tuple(-ENOENT, 0);
308 for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
309 auto p = MakeDrmModePlaneUnique(fd(), plane_res->planes[i]);
311 ALOGE("Failed to get plane %d", plane_res->planes[i]);
316 std::unique_ptr<DrmPlane> plane(new DrmPlane(this, p.get()));
320 ALOGE("Init plane %d failed", plane_res->planes[i]);
324 planes_.emplace_back(std::move(plane));
327 return std::make_tuple(ret, 0);
329 ret = event_listener_.Init();
331 ALOGE("Can't initialize event listener %d", ret);
332 return std::make_tuple(ret, 0);
335 for (auto &conn : connectors_) {
336 ret = CreateDisplayPipe(conn.get());
338 ALOGE("Failed CreateDisplayPipe %d with %d", conn->id(), ret);
339 return std::make_tuple(ret, 0);
341 if (!AttachWriteback(conn.get())) {
342 ALOGI("Display %d has writeback attach to it", conn->display());
345 return std::make_tuple(ret, displays_.size());
348 bool DrmDevice::HandlesDisplay(int display) const {
349 return displays_.find(display) != displays_.end();
352 DrmConnector *DrmDevice::GetConnectorForDisplay(int display) const {
353 for (const auto &conn : connectors_) {
354 if (conn->display() == display)
360 DrmConnector *DrmDevice::GetWritebackConnectorForDisplay(int display) const {
361 for (const auto &conn : writeback_connectors_) {
362 if (conn->display() == display)
368 // TODO(nobody): what happens when hotplugging
369 DrmConnector *DrmDevice::AvailableWritebackConnector(int display) const {
370 DrmConnector *writeback_conn = GetWritebackConnectorForDisplay(display);
371 DrmConnector *display_conn = GetConnectorForDisplay(display);
372 // If we have a writeback already attached to the same CRTC just use that,
374 if (display_conn && writeback_conn &&
375 writeback_conn->encoder()->CanClone(display_conn->encoder()))
376 return writeback_conn;
378 // Use another CRTC if available and doesn't have any connector
379 for (const auto &crtc : crtcs_) {
380 if (crtc->display() == display)
382 display_conn = GetConnectorForDisplay(crtc->display());
383 // If we have a display connected don't use it for writeback
384 if (display_conn && display_conn->state() == DRM_MODE_CONNECTED)
386 writeback_conn = GetWritebackConnectorForDisplay(crtc->display());
388 return writeback_conn;
393 DrmCrtc *DrmDevice::GetCrtcForDisplay(int display) const {
394 for (const auto &crtc : crtcs_) {
395 if (crtc->display() == display)
401 DrmPlane *DrmDevice::GetPlane(uint32_t id) const {
402 for (const auto &plane : planes_) {
403 if (plane->id() == id)
409 const std::vector<std::unique_ptr<DrmCrtc>> &DrmDevice::crtcs() const {
413 uint32_t DrmDevice::next_mode_id() {
417 int DrmDevice::TryEncoderForDisplay(int display, DrmEncoder *enc) {
418 /* First try to use the currently-bound crtc */
419 DrmCrtc *crtc = enc->crtc();
420 if (crtc && crtc->can_bind(display)) {
421 crtc->set_display(display);
426 /* Try to find a possible crtc which will work */
427 for (DrmCrtc *crtc : enc->possible_crtcs()) {
428 /* We've already tried this earlier */
429 if (crtc == enc->crtc())
432 if (crtc->can_bind(display)) {
433 crtc->set_display(display);
439 /* We can't use the encoder, but nothing went wrong, try another one */
443 int DrmDevice::CreateDisplayPipe(DrmConnector *connector) {
444 int display = connector->display();
445 /* Try to use current setup first */
446 if (connector->encoder()) {
447 int ret = TryEncoderForDisplay(display, connector->encoder());
452 if (ret != -EAGAIN) {
453 ALOGE("Could not set mode %d/%d", display, ret);
458 for (DrmEncoder *enc : connector->possible_encoders()) {
459 int ret = TryEncoderForDisplay(display, enc);
461 connector->set_encoder(enc);
465 if (ret != -EAGAIN) {
466 ALOGE("Could not set mode %d/%d", display, ret);
470 ALOGE("Could not find a suitable encoder/crtc for display %d",
471 connector->display());
475 // Attach writeback connector to the CRTC linked to the display_conn
476 int DrmDevice::AttachWriteback(DrmConnector *display_conn) {
477 DrmCrtc *display_crtc = display_conn->encoder()->crtc();
478 if (GetWritebackConnectorForDisplay(display_crtc->display()) != nullptr) {
479 ALOGE("Display already has writeback attach to it");
482 for (auto &writeback_conn : writeback_connectors_) {
483 if (writeback_conn->display() >= 0)
485 for (DrmEncoder *writeback_enc : writeback_conn->possible_encoders()) {
486 for (DrmCrtc *possible_crtc : writeback_enc->possible_crtcs()) {
487 if (possible_crtc != display_crtc)
489 // Use just encoders which had not been bound already
490 if (writeback_enc->can_bind(display_crtc->display())) {
491 writeback_enc->set_crtc(display_crtc);
492 writeback_conn->set_encoder(writeback_enc);
493 writeback_conn->set_display(display_crtc->display());
494 writeback_conn->UpdateModes();
503 int DrmDevice::CreatePropertyBlob(void *data, size_t length,
504 uint32_t *blob_id) const {
505 struct drm_mode_create_blob create_blob {};
506 create_blob.length = length;
507 create_blob.data = (__u64)data;
509 int ret = drmIoctl(fd(), DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob);
511 ALOGE("Failed to create mode property blob %d", ret);
514 *blob_id = create_blob.blob_id;
518 int DrmDevice::DestroyPropertyBlob(uint32_t blob_id) const {
522 struct drm_mode_destroy_blob destroy_blob {};
523 destroy_blob.blob_id = (__u32)blob_id;
524 int ret = drmIoctl(fd(), DRM_IOCTL_MODE_DESTROYPROPBLOB, &destroy_blob);
526 ALOGE("Failed to destroy mode property blob %" PRIu32 "/%d", blob_id, ret);
532 DrmEventListener *DrmDevice::event_listener() {
533 return &event_listener_;
536 int DrmDevice::GetProperty(uint32_t obj_id, uint32_t obj_type,
537 const char *prop_name, DrmProperty *property) const {
538 drmModeObjectPropertiesPtr props = nullptr;
540 props = drmModeObjectGetProperties(fd(), obj_id, obj_type);
542 ALOGE("Failed to get properties for %d/%x", obj_id, obj_type);
547 for (int i = 0; !found && (size_t)i < props->count_props; ++i) {
548 drmModePropertyPtr p = drmModeGetProperty(fd(), props->props[i]);
549 if (!strcmp(p->name, prop_name)) {
550 property->Init(obj_id, p, props->prop_values[i]);
553 drmModeFreeProperty(p);
556 drmModeFreeObjectProperties(props);
557 return found ? 0 : -ENOENT;
560 int DrmDevice::GetPlaneProperty(const DrmPlane &plane, const char *prop_name,
561 DrmProperty *property) {
562 return GetProperty(plane.id(), DRM_MODE_OBJECT_PLANE, prop_name, property);
565 int DrmDevice::GetCrtcProperty(const DrmCrtc &crtc, const char *prop_name,
566 DrmProperty *property) {
567 return GetProperty(crtc.id(), DRM_MODE_OBJECT_CRTC, prop_name, property);
570 int DrmDevice::GetConnectorProperty(const DrmConnector &connector,
571 const char *prop_name,
572 DrmProperty *property) {
573 return GetProperty(connector.id(), DRM_MODE_OBJECT_CONNECTOR, prop_name,
577 std::string DrmDevice::GetName() const {
578 auto *ver = drmGetVersion(fd());
580 ALOGW("Failed to get drm version for fd=%d", fd());
584 std::string name(ver->name);
588 } // namespace android