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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-platform"
#include "drmresources.h"
#include "platform.h"
#include <log/log.h>
namespace android {
std::vector<DrmPlane *> Planner::GetUsablePlanes(
DrmCrtc *crtc, std::vector<DrmPlane *> *primary_planes,
std::vector<DrmPlane *> *overlay_planes) {
std::vector<DrmPlane *> usable_planes;
std::copy_if(primary_planes->begin(), primary_planes->end(),
std::back_inserter(usable_planes),
[=](DrmPlane *plane) { return plane->GetCrtcSupported(*crtc); });
std::copy_if(overlay_planes->begin(), overlay_planes->end(),
std::back_inserter(usable_planes),
[=](DrmPlane *plane) { return plane->GetCrtcSupported(*crtc); });
return usable_planes;
}
std::tuple<int, std::vector<DrmCompositionPlane>> Planner::ProvisionPlanes(
std::map<size_t, DrmHwcLayer *> &layers, bool use_squash_fb, DrmCrtc *crtc,
std::vector<DrmPlane *> *primary_planes,
std::vector<DrmPlane *> *overlay_planes) {
std::vector<DrmCompositionPlane> composition;
std::vector<DrmPlane *> planes =
GetUsablePlanes(crtc, primary_planes, overlay_planes);
if (planes.empty()) {
ALOGE("Display %d has no usable planes", crtc->display());
return std::make_tuple(-ENODEV, std::vector<DrmCompositionPlane>());
}
// If needed, reserve the squash plane at the highest z-order
DrmPlane *squash_plane = NULL;
if (use_squash_fb) {
if (!planes.empty()) {
squash_plane = planes.back();
planes.pop_back();
} else {
ALOGI("Not enough planes to reserve for squash fb");
}
}
// If needed, reserve the precomp plane at the next highest z-order
DrmPlane *precomp_plane = NULL;
if (layers.size() > planes.size()) {
if (!planes.empty()) {
precomp_plane = planes.back();
planes.pop_back();
composition.emplace_back(DrmCompositionPlane::Type::kPrecomp,
precomp_plane, crtc);
} else {
ALOGE("Not enough planes to reserve for precomp fb");
}
}
// Go through the provisioning stages and provision planes
for (auto &i : stages_) {
int ret = i->ProvisionPlanes(&composition, layers, crtc, &planes);
if (ret) {
ALOGE("Failed provision stage with ret %d", ret);
return std::make_tuple(ret, std::vector<DrmCompositionPlane>());
}
}
if (squash_plane)
composition.emplace_back(DrmCompositionPlane::Type::kSquash, squash_plane,
crtc);
return std::make_tuple(0, std::move(composition));
}
int PlanStageProtected::ProvisionPlanes(
std::vector<DrmCompositionPlane> *composition,
std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
std::vector<DrmPlane *> *planes) {
int ret;
int protected_zorder = -1;
for (auto i = layers.begin(); i != layers.end();) {
if (!i->second->protected_usage()) {
++i;
continue;
}
ret = Emplace(composition, planes, DrmCompositionPlane::Type::kLayer, crtc,
i->first);
if (ret)
ALOGE("Failed to dedicate protected layer! Dropping it.");
protected_zorder = i->first;
i = layers.erase(i);
}
if (protected_zorder == -1)
return 0;
// Add any layers below the protected content to the precomposition since we
// need to punch a hole through them.
for (auto i = layers.begin(); i != layers.end();) {
// Skip layers above the z-order of the protected content
if (i->first > static_cast<size_t>(protected_zorder)) {
++i;
continue;
}
// If there's no precomp layer already queued, queue one now.
DrmCompositionPlane *precomp = GetPrecomp(composition);
if (precomp) {
precomp->source_layers().emplace_back(i->first);
} else {
if (!planes->empty()) {
DrmPlane *precomp_plane = planes->back();
planes->pop_back();
composition->emplace_back(DrmCompositionPlane::Type::kPrecomp,
precomp_plane, crtc, i->first);
} else {
ALOGE("Not enough planes to reserve for precomp fb");
}
}
i = layers.erase(i);
}
return 0;
}
int PlanStagePrecomp::ProvisionPlanes(
std::vector<DrmCompositionPlane> *composition,
std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc * /*crtc*/,
std::vector<DrmPlane *> * /*planes*/) {
DrmCompositionPlane *precomp = GetPrecomp(composition);
if (!precomp || precomp->source_layers().empty())
return 0;
// Find lowest zorder out of precomp layers
size_t precomp_zorder = *std::min_element(
precomp->source_layers().begin(), precomp->source_layers().end(),
[](size_t a, size_t b) { return a < b; });
// if there are any remaining layers on top of any of the precomp layers,
// add them to precomp to avoid blending issues since precomp is always at
// highest zorder
for (auto i = layers.begin(); i != layers.end();) {
if (i->first < precomp_zorder) {
i++;
continue;
}
precomp->source_layers().emplace_back(i->first);
i = layers.erase(i);
}
return 0;
}
int PlanStageGreedy::ProvisionPlanes(
std::vector<DrmCompositionPlane> *composition,
std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
std::vector<DrmPlane *> *planes) {
// Fill up the remaining planes
for (auto i = layers.begin(); i != layers.end(); i = layers.erase(i)) {
int ret = Emplace(composition, planes, DrmCompositionPlane::Type::kLayer,
crtc, i->first);
// We don't have any planes left
if (ret == -ENOENT)
break;
else if (ret)
ALOGE("Failed to emplace layer %zu, dropping it", i->first);
}
// Put the rest of the layers in the precomp plane
DrmCompositionPlane *precomp = GetPrecomp(composition);
if (precomp) {
for (auto i = layers.begin(); i != layers.end(); i = layers.erase(i))
precomp->source_layers().emplace_back(i->first);
}
return 0;
}
}
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