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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 <cutils/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 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;
+}
+}