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138 lines
4.7 KiB
138 lines
4.7 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Backend.h"
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#include "BackendManager.h"
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#include "bufferinfo/BufferInfoGetter.h"
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namespace android {
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HWC2::Error Backend::ValidateDisplay(DrmHwcTwo::HwcDisplay *display,
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uint32_t *num_types,
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uint32_t *num_requests) {
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*num_types = 0;
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*num_requests = 0;
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size_t avail_planes = display->primary_planes().size() +
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display->overlay_planes().size();
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/*
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* If more layers then planes, save one plane
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* for client composited layers
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*/
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if (avail_planes < display->layers().size())
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avail_planes--;
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std::map<uint32_t, DrmHwcTwo::HwcLayer *> z_map, z_map_tmp;
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uint32_t z_index = 0;
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// First create a map of layers and z_order values
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for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l :
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display->layers())
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z_map_tmp.emplace(std::make_pair(l.second.z_order(), &l.second));
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// normalise the map so that the lowest z_order layer has key 0
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for (std::pair<const uint32_t, DrmHwcTwo::HwcLayer *> &l : z_map_tmp)
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z_map.emplace(std::make_pair(z_index++, l.second));
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uint32_t total_pixops = display->CalcPixOps(z_map, 0, z_map.size());
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uint32_t gpu_pixops = 0;
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int client_start = -1, client_size = 0;
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if (display->compositor().ShouldFlattenOnClient()) {
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client_start = 0;
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client_size = z_map.size();
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display->MarkValidated(z_map, client_start, client_size);
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} else {
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std::tie(client_start, client_size) = GetClientLayers(display, z_map);
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int extra_client = (z_map.size() - client_size) - avail_planes;
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if (extra_client > 0) {
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int start = 0, steps;
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if (client_size != 0) {
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int prepend = std::min(client_start, extra_client);
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int append = std::min(int(z_map.size() - (client_start + client_size)),
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extra_client);
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start = client_start - prepend;
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client_size += extra_client;
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steps = 1 + std::min(std::min(append, prepend),
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int(z_map.size()) - (start + client_size));
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} else {
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client_size = extra_client;
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steps = 1 + z_map.size() - extra_client;
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}
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gpu_pixops = INT_MAX;
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for (int i = 0; i < steps; i++) {
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uint32_t po = display->CalcPixOps(z_map, start + i, client_size);
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if (po < gpu_pixops) {
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gpu_pixops = po;
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client_start = start + i;
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}
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}
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}
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display->MarkValidated(z_map, client_start, client_size);
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bool testing_needed = !(client_start == 0 && client_size == z_map.size());
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if (testing_needed &&
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display->CreateComposition(true) != HWC2::Error::None) {
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++display->total_stats().failed_kms_validate_;
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gpu_pixops = total_pixops;
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client_size = z_map.size();
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display->MarkValidated(z_map, 0, client_size);
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}
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}
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*num_types = client_size;
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display->total_stats().frames_flattened_ = display->compositor()
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.GetFlattenedFramesCount();
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display->total_stats().gpu_pixops_ += gpu_pixops;
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display->total_stats().total_pixops_ += total_pixops;
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return *num_types ? HWC2::Error::HasChanges : HWC2::Error::None;
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}
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std::tuple<int, int> Backend::GetClientLayers(
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DrmHwcTwo::HwcDisplay *display,
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const std::map<uint32_t, DrmHwcTwo::HwcLayer *> &z_map) {
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int client_start = -1, client_size = 0;
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for (auto & [ z_order, layer ] : z_map) {
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if (IsClientLayer(display, layer)) {
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if (client_start < 0)
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client_start = z_order;
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client_size = (z_order - client_start) + 1;
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}
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}
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return std::make_tuple(client_start, client_size);
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}
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bool Backend::IsClientLayer(DrmHwcTwo::HwcDisplay *display,
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DrmHwcTwo::HwcLayer *layer) {
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return !display->HardwareSupportsLayerType(layer->sf_type()) ||
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!BufferInfoGetter::GetInstance()->IsHandleUsable(layer->buffer()) ||
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display->color_transform_hint() != HAL_COLOR_TRANSFORM_IDENTITY ||
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(layer->RequireScalingOrPhasing() &&
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display->resource_manager()->ForcedScalingWithGpu());
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}
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REGISTER_BACKEND("generic", Backend);
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} // namespace android
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