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 "drm/DrmPlane.h"
34 #include "utils/log.h"
35 #include "utils/properties.h"
37 static void trim_left(std::string *str) {
38 str->erase(std::begin(*str),
39 std::find_if(std::begin(*str), std::end(*str),
40 [](int ch) { return std::isspace(ch) == 0; }));
43 static void trim_right(std::string *str) {
44 str->erase(std::find_if(std::rbegin(*str), std::rend(*str),
45 [](int ch) { return std::isspace(ch) == 0; })
50 static void trim(std::string *str) {
57 static std::vector<std::string> read_primary_display_order_prop() {
58 std::array<char, PROPERTY_VALUE_MAX> display_order_buf{};
59 property_get("vendor.hwc.drm.primary_display_order", display_order_buf.data(),
62 std::vector<std::string> display_order;
63 std::istringstream str(display_order_buf.data());
64 for (std::string conn_name; std::getline(str, conn_name, ',');) {
66 display_order.push_back(std::move(conn_name));
71 static std::vector<DrmConnector *> make_primary_display_candidates(
72 const std::vector<std::unique_ptr<DrmConnector>> &connectors) {
73 std::vector<DrmConnector *> primary_candidates;
74 std::transform(std::begin(connectors), std::end(connectors),
75 std::back_inserter(primary_candidates),
76 [](const std::unique_ptr<DrmConnector> &conn) {
79 primary_candidates.erase(std::remove_if(std::begin(primary_candidates),
80 std::end(primary_candidates),
81 [](const DrmConnector *conn) {
82 return conn->state() !=
85 std::end(primary_candidates));
87 std::vector<std::string> display_order = read_primary_display_order_prop();
88 bool use_other = display_order.back() == "...";
90 // putting connectors from primary_display_order first
91 auto curr_connector = std::begin(primary_candidates);
92 for (const std::string &display_name : display_order) {
93 auto it = std::find_if(std::begin(primary_candidates),
94 std::end(primary_candidates),
95 [&display_name](const DrmConnector *conn) {
96 return conn->name() == display_name;
98 if (it != std::end(primary_candidates)) {
99 std::iter_swap(it, curr_connector);
105 // then putting internal connectors second, everything else afterwards
106 std::partition(curr_connector, std::end(primary_candidates),
107 [](const DrmConnector *conn) { return conn->internal(); });
109 primary_candidates.erase(curr_connector, std::end(primary_candidates));
112 return primary_candidates;
115 DrmDevice::DrmDevice() {
117 mDrmFbImporter = std::make_unique<DrmFbImporter>(self);
120 // NOLINTNEXTLINE (readability-function-cognitive-complexity): Fixme
121 std::tuple<int, int> DrmDevice::Init(const char *path, int num_displays) {
122 /* TODO: Use drmOpenControl here instead */
123 fd_ = UniqueFd(open(path, O_RDWR | O_CLOEXEC));
125 // NOLINTNEXTLINE(concurrency-mt-unsafe): Fixme
126 ALOGE("Failed to open dri %s: %s", path, strerror(errno));
127 return std::make_tuple(-ENODEV, 0);
130 int ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
132 ALOGE("Failed to set universal plane cap %d", ret);
133 return std::make_tuple(ret, 0);
136 ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_ATOMIC, 1);
138 ALOGE("Failed to set atomic cap %d", ret);
139 return std::make_tuple(ret, 0);
142 #ifdef DRM_CLIENT_CAP_WRITEBACK_CONNECTORS
143 ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_WRITEBACK_CONNECTORS, 1);
145 ALOGI("Failed to set writeback cap %d", ret);
150 uint64_t cap_value = 0;
151 if (drmGetCap(fd(), DRM_CAP_ADDFB2_MODIFIERS, &cap_value)) {
152 ALOGW("drmGetCap failed. Fallback to no modifier support.");
155 HasAddFb2ModifiersSupport_ = cap_value != 0;
158 if (!drmIsMaster(fd())) {
159 ALOGE("DRM/KMS master access required");
160 return std::make_tuple(-EACCES, 0);
163 auto res = MakeDrmModeResUnique(fd());
165 ALOGE("Failed to get DrmDevice resources");
166 return std::make_tuple(-ENODEV, 0);
169 min_resolution_ = std::pair<uint32_t, uint32_t>(res->min_width,
171 max_resolution_ = std::pair<uint32_t, uint32_t>(res->max_width,
174 // Assumes that the primary display will always be in the first
175 // drm_device opened.
176 bool found_primary = num_displays != 0;
178 for (int i = 0; !ret && i < res->count_crtcs; ++i) {
179 auto c = MakeDrmModeCrtcUnique(fd(), res->crtcs[i]);
181 ALOGE("Failed to get crtc %d", res->crtcs[i]);
186 std::unique_ptr<DrmCrtc> crtc(new DrmCrtc(this, c.get(), i));
190 ALOGE("Failed to initialize crtc %d", res->crtcs[i]);
193 crtcs_.emplace_back(std::move(crtc));
196 std::vector<uint32_t> possible_clones;
197 for (int i = 0; !ret && i < res->count_encoders; ++i) {
198 auto e = MakeDrmModeEncoderUnique(fd(), res->encoders[i]);
200 ALOGE("Failed to get encoder %d", res->encoders[i]);
205 std::vector<DrmCrtc *> possible_crtcs;
206 DrmCrtc *current_crtc = nullptr;
207 for (auto &crtc : crtcs_) {
208 if ((1 << crtc->pipe()) & e->possible_crtcs)
209 possible_crtcs.push_back(crtc.get());
211 if (crtc->id() == e->crtc_id)
212 current_crtc = crtc.get();
215 std::unique_ptr<DrmEncoder> enc(
216 new DrmEncoder(e.get(), current_crtc, possible_crtcs));
217 possible_clones.push_back(e->possible_clones);
219 encoders_.emplace_back(std::move(enc));
222 for (unsigned int i = 0; i < encoders_.size(); i++) {
223 for (unsigned int j = 0; j < encoders_.size(); j++)
224 if (possible_clones[i] & (1 << j))
225 encoders_[i]->AddPossibleClone(encoders_[j].get());
228 for (int i = 0; !ret && i < res->count_connectors; ++i) {
229 auto c = MakeDrmModeConnectorUnique(fd(), res->connectors[i]);
231 ALOGE("Failed to get connector %d", res->connectors[i]);
236 std::vector<DrmEncoder *> possible_encoders;
237 DrmEncoder *current_encoder = nullptr;
238 for (int j = 0; j < c->count_encoders; ++j) {
239 for (auto &encoder : encoders_) {
240 if (encoder->id() == c->encoders[j])
241 possible_encoders.push_back(encoder.get());
242 if (encoder->id() == c->encoder_id)
243 current_encoder = encoder.get();
247 std::unique_ptr<DrmConnector> conn(
248 new DrmConnector(this, c.get(), current_encoder, possible_encoders));
252 ALOGE("Init connector %d failed", res->connectors[i]);
256 if (conn->writeback())
257 writeback_connectors_.emplace_back(std::move(conn));
259 connectors_.emplace_back(std::move(conn));
262 // Primary display priority:
263 // 1) vendor.hwc.drm.primary_display_order property
264 // 2) internal connectors
266 std::vector<DrmConnector *>
267 primary_candidates = make_primary_display_candidates(connectors_);
268 if (!primary_candidates.empty() && !found_primary) {
269 DrmConnector &conn = **std::begin(primary_candidates);
270 conn.set_display(num_displays);
271 displays_[num_displays] = num_displays;
273 found_primary = true;
276 "Failed to find primary display from "
277 "\"vendor.hwc.drm.primary_display_order\" property");
280 // If no priority display were found then pick first available as primary and
281 // for the others assign consecutive display_numbers.
282 for (auto &conn : connectors_) {
283 if (conn->external() || conn->internal()) {
284 if (!found_primary) {
285 conn->set_display(num_displays);
286 displays_[num_displays] = num_displays;
287 found_primary = true;
289 } else if (conn->display() < 0) {
290 conn->set_display(num_displays);
291 displays_[num_displays] = num_displays;
297 // Catch-all for the above loops
299 return std::make_tuple(ret, 0);
301 auto plane_res = MakeDrmModePlaneResUnique(fd());
303 ALOGE("Failed to get plane resources");
304 return std::make_tuple(-ENOENT, 0);
307 for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
308 auto p = MakeDrmModePlaneUnique(fd(), plane_res->planes[i]);
310 ALOGE("Failed to get plane %d", plane_res->planes[i]);
315 std::unique_ptr<DrmPlane> plane(new DrmPlane(this, p.get()));
319 ALOGE("Init plane %d failed", plane_res->planes[i]);
323 planes_.emplace_back(std::move(plane));
326 return std::make_tuple(ret, 0);
328 for (auto &conn : connectors_) {
329 ret = CreateDisplayPipe(conn.get());
331 ALOGE("Failed CreateDisplayPipe %d with %d", conn->id(), ret);
332 return std::make_tuple(ret, 0);
334 if (!AttachWriteback(conn.get())) {
335 ALOGI("Display %d has writeback attach to it", conn->display());
338 return std::make_tuple(ret, displays_.size());
341 bool DrmDevice::HandlesDisplay(int display) const {
342 return displays_.find(display) != displays_.end();
345 DrmConnector *DrmDevice::GetConnectorForDisplay(int display) const {
346 for (const auto &conn : connectors_) {
347 if (conn->display() == display)
353 DrmConnector *DrmDevice::GetWritebackConnectorForDisplay(int display) const {
354 for (const auto &conn : writeback_connectors_) {
355 if (conn->display() == display)
361 // TODO(nobody): what happens when hotplugging
362 DrmConnector *DrmDevice::AvailableWritebackConnector(int display) const {
363 DrmConnector *writeback_conn = GetWritebackConnectorForDisplay(display);
364 DrmConnector *display_conn = GetConnectorForDisplay(display);
365 // If we have a writeback already attached to the same CRTC just use that,
367 if (display_conn && writeback_conn &&
368 writeback_conn->encoder()->CanClone(display_conn->encoder()))
369 return writeback_conn;
371 // Use another CRTC if available and doesn't have any connector
372 for (const auto &crtc : crtcs_) {
373 if (crtc->display() == display)
375 display_conn = GetConnectorForDisplay(crtc->display());
376 // If we have a display connected don't use it for writeback
377 if (display_conn && display_conn->state() == DRM_MODE_CONNECTED)
379 writeback_conn = GetWritebackConnectorForDisplay(crtc->display());
381 return writeback_conn;
386 DrmCrtc *DrmDevice::GetCrtcForDisplay(int display) const {
387 for (const auto &crtc : crtcs_) {
388 if (crtc->display() == display)
394 const std::vector<std::unique_ptr<DrmCrtc>> &DrmDevice::crtcs() const {
398 uint32_t DrmDevice::next_mode_id() {
402 int DrmDevice::TryEncoderForDisplay(int display, DrmEncoder *enc) {
403 /* First try to use the currently-bound crtc */
404 DrmCrtc *crtc = enc->crtc();
405 if (crtc && crtc->can_bind(display)) {
406 crtc->set_display(display);
411 /* Try to find a possible crtc which will work */
412 for (DrmCrtc *crtc : enc->possible_crtcs()) {
413 /* We've already tried this earlier */
414 if (crtc == enc->crtc())
417 if (crtc->can_bind(display)) {
418 crtc->set_display(display);
424 /* We can't use the encoder, but nothing went wrong, try another one */
428 int DrmDevice::CreateDisplayPipe(DrmConnector *connector) {
429 int display = connector->display();
430 /* Try to use current setup first */
431 if (connector->encoder()) {
432 int ret = TryEncoderForDisplay(display, connector->encoder());
437 if (ret != -EAGAIN) {
438 ALOGE("Could not set mode %d/%d", display, ret);
443 for (DrmEncoder *enc : connector->possible_encoders()) {
444 int ret = TryEncoderForDisplay(display, enc);
446 connector->set_encoder(enc);
450 if (ret != -EAGAIN) {
451 ALOGE("Could not set mode %d/%d", display, ret);
455 ALOGE("Could not find a suitable encoder/crtc for display %d",
456 connector->display());
460 // Attach writeback connector to the CRTC linked to the display_conn
461 int DrmDevice::AttachWriteback(DrmConnector *display_conn) {
462 DrmCrtc *display_crtc = display_conn->encoder()->crtc();
463 if (GetWritebackConnectorForDisplay(display_crtc->display()) != nullptr) {
464 ALOGE("Display already has writeback attach to it");
467 for (auto &writeback_conn : writeback_connectors_) {
468 if (writeback_conn->display() >= 0)
470 for (DrmEncoder *writeback_enc : writeback_conn->possible_encoders()) {
471 for (DrmCrtc *possible_crtc : writeback_enc->possible_crtcs()) {
472 if (possible_crtc != display_crtc)
474 // Use just encoders which had not been bound already
475 if (writeback_enc->can_bind(display_crtc->display())) {
476 writeback_enc->set_crtc(display_crtc);
477 writeback_conn->set_encoder(writeback_enc);
478 writeback_conn->set_display(display_crtc->display());
479 writeback_conn->UpdateModes();
488 auto DrmDevice::RegisterUserPropertyBlob(void *data, size_t length) const
489 -> DrmModeUserPropertyBlobUnique {
490 struct drm_mode_create_blob create_blob {};
491 create_blob.length = length;
492 create_blob.data = (__u64)data;
494 int ret = drmIoctl(fd(), DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob);
496 ALOGE("Failed to create mode property blob %d", ret);
497 return DrmModeUserPropertyBlobUnique();
500 return DrmModeUserPropertyBlobUnique(
501 new uint32_t(create_blob.blob_id), [this](const uint32_t *it) {
502 struct drm_mode_destroy_blob destroy_blob {};
503 destroy_blob.blob_id = (__u32)*it;
504 int err = drmIoctl(fd(), DRM_IOCTL_MODE_DESTROYPROPBLOB, &destroy_blob);
506 ALOGE("Failed to destroy mode property blob %" PRIu32 "/%d", *it,
509 // NOLINTNEXTLINE(cppcoreguidelines-owning-memory)
514 int DrmDevice::GetProperty(uint32_t obj_id, uint32_t obj_type,
515 const char *prop_name, DrmProperty *property) const {
516 drmModeObjectPropertiesPtr props = nullptr;
518 props = drmModeObjectGetProperties(fd(), obj_id, obj_type);
520 ALOGE("Failed to get properties for %d/%x", obj_id, obj_type);
525 for (int i = 0; !found && (size_t)i < props->count_props; ++i) {
526 drmModePropertyPtr p = drmModeGetProperty(fd(), props->props[i]);
527 if (!strcmp(p->name, prop_name)) {
528 property->Init(obj_id, p, props->prop_values[i]);
531 drmModeFreeProperty(p);
534 drmModeFreeObjectProperties(props);
535 return found ? 0 : -ENOENT;
538 int DrmDevice::GetCrtcProperty(const DrmCrtc &crtc, const char *prop_name,
539 DrmProperty *property) const {
540 return GetProperty(crtc.id(), DRM_MODE_OBJECT_CRTC, prop_name, property);
543 int DrmDevice::GetConnectorProperty(const DrmConnector &connector,
544 const char *prop_name,
545 DrmProperty *property) const {
546 return GetProperty(connector.id(), DRM_MODE_OBJECT_CONNECTOR, prop_name,
550 std::string DrmDevice::GetName() const {
551 auto *ver = drmGetVersion(fd());
553 ALOGW("Failed to get drm version for fd=%d", fd());
557 std::string name(ver->name);
562 auto DrmDevice::IsKMSDev(const char *path) -> bool {
563 auto fd = UniqueFd(open(path, O_RDWR | O_CLOEXEC));
568 auto res = MakeDrmModeResUnique(fd.Get());
573 bool is_kms = res->count_crtcs > 0 && res->count_connectors > 0 &&
574 res->count_encoders > 0;
579 } // namespace android