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/*
* 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 "backend/Backend.h"
#include "utils/log.h"
namespace android {
DrmHwcTwo::DrmHwcTwo() = default;
HWC2::Error DrmHwcTwo::CreateDisplay(hwc2_display_t displ,
HWC2::DisplayType type) {
DrmDevice *drm = resource_manager_.GetDrmDevice(static_cast<int>(displ));
if (!drm) {
ALOGE("Failed to get a valid drmresource");
return HWC2::Error::NoResources;
}
displays_.emplace(std::piecewise_construct, std::forward_as_tuple(displ),
std::forward_as_tuple(&resource_manager_, drm, displ, type,
this));
DrmCrtc *crtc = drm->GetCrtcForDisplay(static_cast<int>(displ));
if (!crtc) {
ALOGE("Failed to get crtc for display %d", static_cast<int>(displ));
return HWC2::Error::BadDisplay;
}
auto display_planes = std::vector<DrmPlane *>();
for (const auto &plane : drm->planes()) {
if (plane->GetCrtcSupported(*crtc))
display_planes.push_back(plane.get());
}
displays_.at(displ).Init(&display_planes);
return HWC2::Error::None;
}
HWC2::Error DrmHwcTwo::Init() {
int rv = resource_manager_.Init();
if (rv) {
ALOGE("Can't initialize the resource manager %d", rv);
return HWC2::Error::NoResources;
}
HWC2::Error ret = HWC2::Error::None;
for (int i = 0; i < resource_manager_.GetDisplayCount(); i++) {
ret = CreateDisplay(i, HWC2::DisplayType::Physical);
if (ret != HWC2::Error::None) {
ALOGE("Failed to create display %d with error %d", i, ret);
return ret;
}
}
resource_manager_.GetUEventListener()->RegisterHotplugHandler([this] {
const std::lock_guard<std::mutex> lock(GetResMan().GetMainLock());
HandleHotplugUEvent();
});
return ret;
}
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 (std::pair<const hwc2_display_t, HwcDisplay> &dp : displays_)
output << dp.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);
const auto &drm_devices = resource_manager_.GetDrmDevices();
for (const auto &device : drm_devices)
HandleInitialHotplugState(device.get());
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;
}
#endif
default:
break;
}
return HWC2::Error::None;
}
void DrmHwcTwo::HandleDisplayHotplug(hwc2_display_t displayid, int state) {
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,
state == DRM_MODE_CONNECTED ? HWC2_CONNECTION_CONNECTED
: HWC2_CONNECTION_DISCONNECTED);
mutex.lock();
}
}
void DrmHwcTwo::HandleInitialHotplugState(DrmDevice *drmDevice) {
for (const auto &conn : drmDevice->connectors()) {
int display_id = conn->display();
auto &display = displays_.at(display_id);
if (conn->state() != DRM_MODE_CONNECTED && !display.IsInHeadlessMode())
continue;
HandleDisplayHotplug(conn->display(), display.IsInHeadlessMode()
? DRM_MODE_CONNECTED
: conn->state());
}
}
void DrmHwcTwo::HandleHotplugUEvent() {
for (const auto &drm : resource_manager_.GetDrmDevices()) {
for (const auto &conn : drm->connectors()) {
drmModeConnection old_state = conn->state();
drmModeConnection cur_state = conn->UpdateModes()
? DRM_MODE_UNKNOWNCONNECTION
: conn->state();
if (cur_state == old_state)
continue;
ALOGI("%s event for connector %u on display %d",
cur_state == DRM_MODE_CONNECTED ? "Plug" : "Unplug", conn->id(),
conn->display());
int display_id = conn->display();
auto &display = displays_.at(display_id);
display.ChosePreferredConfig();
if (cur_state != DRM_MODE_CONNECTED) {
display.ClearDisplay();
}
HandleDisplayHotplug(display_id, display.IsInHeadlessMode()
? DRM_MODE_CONNECTED
: cur_state);
}
}
}
} // namespace android
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