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/*
* Copyright (C) 2022 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-display-pipeline"
#include "DrmDisplayPipeline.h"
#include "DrmAtomicStateManager.h"
#include "DrmConnector.h"
#include "DrmCrtc.h"
#include "DrmDevice.h"
#include "DrmEncoder.h"
#include "DrmPlane.h"
#include "utils/log.h"
#include "utils/properties.h"
namespace android {
template <class O>
auto PipelineBindable<O>::BindPipeline(DrmDisplayPipeline *pipeline,
bool return_object_if_bound)
-> std::shared_ptr<BindingOwner<O>> {
auto owner_object = owner_object_.lock();
if (owner_object) {
if (bound_pipeline_ == pipeline && return_object_if_bound) {
return owner_object;
}
return {};
}
owner_object = std::make_shared<BindingOwner<O>>(static_cast<O *>(this));
owner_object_ = owner_object;
bound_pipeline_ = pipeline;
return owner_object;
}
static auto TryCreatePipeline(DrmDevice &dev, DrmConnector &connector,
DrmEncoder &enc, DrmCrtc &crtc)
-> std::unique_ptr<DrmDisplayPipeline> {
/* Check if resources are available */
auto pipe = std::make_unique<DrmDisplayPipeline>();
pipe->device = &dev;
pipe->connector = connector.BindPipeline(pipe.get());
pipe->encoder = enc.BindPipeline(pipe.get());
pipe->crtc = crtc.BindPipeline(pipe.get());
if (!pipe->connector || !pipe->encoder || !pipe->crtc) {
return {};
}
std::vector<DrmPlane *> primary_planes;
std::vector<DrmPlane *> overlay_planes;
/* Attach necessary resources */
auto display_planes = std::vector<DrmPlane *>();
for (const auto &plane : dev.GetPlanes()) {
if (plane->IsCrtcSupported(crtc)) {
if (plane->GetType() == DRM_PLANE_TYPE_PRIMARY) {
primary_planes.emplace_back(plane.get());
} else if (plane->GetType() == DRM_PLANE_TYPE_OVERLAY) {
overlay_planes.emplace_back(plane.get());
} else {
ALOGI("Ignoring cursor plane %d", plane->GetId());
}
}
}
if (primary_planes.empty()) {
ALOGE("Primary plane for CRTC %d not found", crtc.GetId());
return {};
}
for (const auto &plane : primary_planes) {
pipe->primary_plane = plane->BindPipeline(pipe.get());
if (pipe->primary_plane) {
break;
}
}
if (!pipe->primary_plane) {
ALOGE("Failed to bind primary plane");
return {};
}
pipe->atomic_state_manager = DrmAtomicStateManager::CreateInstance(
pipe.get());
return pipe;
}
static auto TryCreatePipelineUsingEncoder(DrmDevice &dev, DrmConnector &conn,
DrmEncoder &enc)
-> std::unique_ptr<DrmDisplayPipeline> {
/* First try to use the currently-bound crtc */
auto *crtc = dev.FindCrtcById(enc.GetCurrentCrtcId());
if (crtc != nullptr) {
auto pipeline = TryCreatePipeline(dev, conn, enc, *crtc);
if (pipeline) {
return pipeline;
}
}
/* Try to find a possible crtc which will work */
for (const auto &crtc : dev.GetCrtcs()) {
if (enc.SupportsCrtc(*crtc)) {
auto pipeline = TryCreatePipeline(dev, conn, enc, *crtc);
if (pipeline) {
return pipeline;
}
}
}
/* We can't use this encoder, but nothing went wrong, try another one */
return {};
}
auto DrmDisplayPipeline::CreatePipeline(DrmConnector &connector)
-> std::unique_ptr<DrmDisplayPipeline> {
auto &dev = connector.GetDev();
/* Try to use current setup first */
auto *encoder = dev.FindEncoderById(connector.GetCurrentEncoderId());
if (encoder != nullptr) {
auto pipeline = TryCreatePipelineUsingEncoder(dev, connector, *encoder);
if (pipeline) {
return pipeline;
}
}
for (const auto &enc : dev.GetEncoders()) {
if (connector.SupportsEncoder(*enc)) {
auto pipeline = TryCreatePipelineUsingEncoder(dev, connector, *enc);
if (pipeline) {
return pipeline;
}
}
}
ALOGE("Could not find a suitable encoder/crtc for connector %s",
connector.GetName().c_str());
return {};
}
static bool ReadUseOverlayProperty() {
char use_overlay_planes_prop[PROPERTY_VALUE_MAX];
property_get("vendor.hwc.drm.use_overlay_planes", use_overlay_planes_prop,
"1");
constexpr int kStrtolBase = 10;
return strtol(use_overlay_planes_prop, nullptr, kStrtolBase) != 0;
}
auto DrmDisplayPipeline::GetUsablePlanes()
-> std::vector<std::shared_ptr<BindingOwner<DrmPlane>>> {
std::vector<std::shared_ptr<BindingOwner<DrmPlane>>> planes;
planes.emplace_back(primary_plane);
const static bool kUseOverlayPlanes = ReadUseOverlayProperty();
if (kUseOverlayPlanes) {
for (const auto &plane : device->GetPlanes()) {
if (plane->IsCrtcSupported(*crtc->Get())) {
if (plane->GetType() == DRM_PLANE_TYPE_OVERLAY) {
auto op = plane->BindPipeline(this, true);
if (op) {
planes.emplace_back(op);
}
}
}
}
}
return planes;
}
DrmDisplayPipeline::~DrmDisplayPipeline() {
if (atomic_state_manager)
atomic_state_manager->StopThread();
}
} // namespace android
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