aboutsummaryrefslogtreecommitdiff
path: root/hwc2_device/DrmHwcTwo.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'hwc2_device/DrmHwcTwo.cpp')
-rw-r--r--hwc2_device/DrmHwcTwo.cpp266
1 files changed, 266 insertions, 0 deletions
diff --git a/hwc2_device/DrmHwcTwo.cpp b/hwc2_device/DrmHwcTwo.cpp
new file mode 100644
index 0000000..e689419
--- /dev/null
+++ b/hwc2_device/DrmHwcTwo.cpp
@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "hwc-drm-two"
+
+#include "DrmHwcTwo.h"
+
+#include <cinttypes>
+
+#include "backend/Backend.h"
+#include "utils/log.h"
+
+namespace android {
+
+DrmHwcTwo::DrmHwcTwo() : resource_manager_(this){};
+
+/* Must be called after every display attach/detach cycle */
+void DrmHwcTwo::FinalizeDisplayBinding() {
+ if (displays_.count(kPrimaryDisplay) == 0) {
+ /* Primary display MUST always exist */
+ ALOGI("No pipelines available. Creating null-display for headless mode");
+ displays_[kPrimaryDisplay] = std::make_unique<
+ HwcDisplay>(kPrimaryDisplay, HWC2::DisplayType::Physical, this);
+ /* Initializes null-display */
+ displays_[kPrimaryDisplay]->SetPipeline(nullptr);
+ }
+
+ if (displays_[kPrimaryDisplay]->IsInHeadlessMode() &&
+ !display_handles_.empty()) {
+ /* Reattach first secondary display to take place of the primary */
+ auto *pipe = display_handles_.begin()->first;
+ ALOGI("Primary display was disconnected, reattaching '%s' as new primary",
+ pipe->connector->Get()->GetName().c_str());
+ UnbindDisplay(pipe);
+ BindDisplay(pipe);
+ }
+
+ // Finally, send hotplug events to the client
+ for (auto &dhe : deferred_hotplug_events_) {
+ SendHotplugEventToClient(dhe.first, dhe.second);
+ }
+ deferred_hotplug_events_.clear();
+
+ /* Wait 0.2s before removing the displays to flush pending HWC2 transactions
+ */
+ auto &mutex = GetResMan().GetMainLock();
+ mutex.unlock();
+ const int kTimeForSFToDisposeDisplayUs = 200000;
+ usleep(kTimeForSFToDisposeDisplayUs);
+ mutex.lock();
+ std::vector<std::unique_ptr<HwcDisplay>> for_disposal;
+ for (auto handle : displays_for_removal_list_) {
+ for_disposal.emplace_back(
+ std::unique_ptr<HwcDisplay>(displays_[handle].release()));
+ displays_.erase(handle);
+ }
+ /* Destroy HwcDisplays while unlocked to avoid vsyncworker deadlocks */
+ mutex.unlock();
+ for_disposal.clear();
+ mutex.lock();
+}
+
+bool DrmHwcTwo::BindDisplay(DrmDisplayPipeline *pipeline) {
+ if (display_handles_.count(pipeline) != 0) {
+ ALOGE("%s, pipeline is already used by another display, FIXME!!!: %p",
+ __func__, pipeline);
+ return false;
+ }
+
+ uint32_t disp_handle = kPrimaryDisplay;
+
+ if (displays_.count(kPrimaryDisplay) != 0 &&
+ !displays_[kPrimaryDisplay]->IsInHeadlessMode()) {
+ disp_handle = ++last_display_handle_;
+ }
+
+ if (displays_.count(disp_handle) == 0) {
+ auto disp = std::make_unique<HwcDisplay>(disp_handle,
+ HWC2::DisplayType::Physical, this);
+ displays_[disp_handle] = std::move(disp);
+ }
+
+ ALOGI("Attaching pipeline '%s' to the display #%d%s",
+ pipeline->connector->Get()->GetName().c_str(), (int)disp_handle,
+ disp_handle == kPrimaryDisplay ? " (Primary)" : "");
+
+ displays_[disp_handle]->SetPipeline(pipeline);
+ display_handles_[pipeline] = disp_handle;
+
+ return true;
+}
+
+bool DrmHwcTwo::UnbindDisplay(DrmDisplayPipeline *pipeline) {
+ if (display_handles_.count(pipeline) == 0) {
+ ALOGE("%s, can't find the display, pipeline: %p", __func__, pipeline);
+ return false;
+ }
+ auto handle = display_handles_[pipeline];
+ display_handles_.erase(pipeline);
+
+ ALOGI("Detaching the pipeline '%s' from the display #%i%s",
+ pipeline->connector->Get()->GetName().c_str(), (int)handle,
+ handle == kPrimaryDisplay ? " (Primary)" : "");
+
+ if (displays_.count(handle) == 0) {
+ ALOGE("%s, can't find the display, handle: %" PRIu64, __func__, handle);
+ return false;
+ }
+ displays_[handle]->SetPipeline(nullptr);
+
+ /* We must defer display disposal and removal, since it may still have pending
+ * HWC_API calls scheduled and waiting until ueventlistener thread releases
+ * main lock, otherwise transaction may fail and SF may crash
+ */
+ if (handle != kPrimaryDisplay) {
+ displays_for_removal_list_.emplace_back(handle);
+ }
+ return true;
+}
+
+HWC2::Error DrmHwcTwo::CreateVirtualDisplay(uint32_t /*width*/,
+ uint32_t /*height*/,
+ int32_t * /*format*/,
+ hwc2_display_t * /*display*/) {
+ // TODO(nobody): Implement virtual display
+ return HWC2::Error::Unsupported;
+}
+
+HWC2::Error DrmHwcTwo::DestroyVirtualDisplay(hwc2_display_t /*display*/) {
+ // TODO(nobody): Implement virtual display
+ return HWC2::Error::Unsupported;
+}
+
+void DrmHwcTwo::Dump(uint32_t *outSize, char *outBuffer) {
+ if (outBuffer != nullptr) {
+ auto copied_bytes = mDumpString.copy(outBuffer, *outSize);
+ *outSize = static_cast<uint32_t>(copied_bytes);
+ return;
+ }
+
+ std::stringstream output;
+
+ output << "-- drm_hwcomposer --\n\n";
+
+ for (auto &disp : displays_)
+ output << disp.second->Dump();
+
+ mDumpString = output.str();
+ *outSize = static_cast<uint32_t>(mDumpString.size());
+}
+
+uint32_t DrmHwcTwo::GetMaxVirtualDisplayCount() {
+ // TODO(nobody): Implement virtual display
+ return 0;
+}
+
+HWC2::Error DrmHwcTwo::RegisterCallback(int32_t descriptor,
+ hwc2_callback_data_t data,
+ hwc2_function_pointer_t function) {
+ switch (static_cast<HWC2::Callback>(descriptor)) {
+ case HWC2::Callback::Hotplug: {
+ hotplug_callback_ = std::make_pair(HWC2_PFN_HOTPLUG(function), data);
+ if (function != nullptr) {
+ resource_manager_.Init();
+ } else {
+ resource_manager_.DeInit();
+ /* Headless display may still be here, remove it */
+ displays_.erase(kPrimaryDisplay);
+ }
+ break;
+ }
+ case HWC2::Callback::Refresh: {
+ refresh_callback_ = std::make_pair(HWC2_PFN_REFRESH(function), data);
+ break;
+ }
+ case HWC2::Callback::Vsync: {
+ vsync_callback_ = std::make_pair(HWC2_PFN_VSYNC(function), data);
+ break;
+ }
+#if PLATFORM_SDK_VERSION > 29
+ case HWC2::Callback::Vsync_2_4: {
+ vsync_2_4_callback_ = std::make_pair(HWC2_PFN_VSYNC_2_4(function), data);
+ break;
+ }
+ case HWC2::Callback::VsyncPeriodTimingChanged: {
+ period_timing_changed_callback_ = std::
+ make_pair(HWC2_PFN_VSYNC_PERIOD_TIMING_CHANGED(function), data);
+ break;
+ }
+#endif
+ default:
+ break;
+ }
+ return HWC2::Error::None;
+}
+
+void DrmHwcTwo::SendHotplugEventToClient(hwc2_display_t displayid,
+ bool connected) {
+ auto &mutex = GetResMan().GetMainLock();
+ if (mutex.try_lock()) {
+ ALOGE("FIXME!!!: Main mutex must be locked in %s", __func__);
+ mutex.unlock();
+ return;
+ }
+
+ auto hc = hotplug_callback_;
+ if (hc.first != nullptr && hc.second != nullptr) {
+ /* For some reason CLIENT will call HWC2 API in hotplug callback handler,
+ * which will cause deadlock . Unlock main mutex to prevent this.
+ */
+ mutex.unlock();
+ hc.first(hc.second, displayid,
+ connected == DRM_MODE_CONNECTED ? HWC2_CONNECTION_CONNECTED
+ : HWC2_CONNECTION_DISCONNECTED);
+ mutex.lock();
+ }
+}
+
+void DrmHwcTwo::SendVsyncEventToClient(
+ hwc2_display_t displayid, int64_t timestamp,
+ [[maybe_unused]] uint32_t vsync_period) const {
+ /* vsync callback */
+#if PLATFORM_SDK_VERSION > 29
+ if (vsync_2_4_callback_.first != nullptr &&
+ vsync_2_4_callback_.second != nullptr) {
+ vsync_2_4_callback_.first(vsync_2_4_callback_.second, displayid, timestamp,
+ vsync_period);
+ } else
+#endif
+ if (vsync_callback_.first != nullptr &&
+ vsync_callback_.second != nullptr) {
+ vsync_callback_.first(vsync_callback_.second, displayid, timestamp);
+ }
+}
+
+void DrmHwcTwo::SendVsyncPeriodTimingChangedEventToClient(
+ [[maybe_unused]] hwc2_display_t displayid,
+ [[maybe_unused]] int64_t timestamp) const {
+#if PLATFORM_SDK_VERSION > 29
+ hwc_vsync_period_change_timeline_t timeline = {
+ .newVsyncAppliedTimeNanos = timestamp,
+ .refreshRequired = false,
+ .refreshTimeNanos = 0,
+ };
+ if (period_timing_changed_callback_.first != nullptr &&
+ period_timing_changed_callback_.second != nullptr) {
+ period_timing_changed_callback_
+ .first(period_timing_changed_callback_.second, displayid, &timeline);
+ }
+#endif
+}
+
+} // namespace android
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 16:38:23 +0000