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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <optional>
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/microprofile.h"
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/core_timing_util.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/readable_event.h"
#include "core/hle/service/nvdrv/devices/nvdisp_disp0.h"
#include "core/hle/service/nvdrv/nvdrv.h"
#include "core/hle/service/nvflinger/buffer_queue.h"
#include "core/hle/service/nvflinger/nvflinger.h"
#include "core/hle/service/vi/display/vi_display.h"
#include "core/hle/service/vi/layer/vi_layer.h"
#include "core/perf_stats.h"
#include "video_core/renderer_base.h"
namespace Service::NVFlinger {
constexpr std::size_t SCREEN_REFRESH_RATE = 60;
constexpr u64 frame_ticks = static_cast<u64>(Core::Timing::BASE_CLOCK_RATE / SCREEN_REFRESH_RATE);
NVFlinger::NVFlinger(Core::Timing::CoreTiming& core_timing) : core_timing{core_timing} {
displays.emplace_back(0, "Default");
displays.emplace_back(1, "External");
displays.emplace_back(2, "Edid");
displays.emplace_back(3, "Internal");
displays.emplace_back(4, "Null");
// Schedule the screen composition events
composition_event =
core_timing.RegisterEvent("ScreenComposition", [this](u64 userdata, int cycles_late) {
Compose();
this->core_timing.ScheduleEvent(frame_ticks - cycles_late, composition_event);
});
core_timing.ScheduleEvent(frame_ticks, composition_event);
}
NVFlinger::~NVFlinger() {
core_timing.UnscheduleEvent(composition_event, 0);
}
void NVFlinger::SetNVDrvInstance(std::shared_ptr<Nvidia::Module> instance) {
nvdrv = std::move(instance);
}
std::optional<u64> NVFlinger::OpenDisplay(std::string_view name) {
LOG_DEBUG(Service, "Opening \"{}\" display", name);
// TODO(Subv): Currently we only support the Default display.
ASSERT(name == "Default");
const auto itr =
std::find_if(displays.begin(), displays.end(),
[&](const VI::Display& display) { return display.GetName() == name; });
if (itr == displays.end()) {
return {};
}
return itr->GetID();
}
std::optional<u64> NVFlinger::CreateLayer(u64 display_id) {
auto* const display = FindDisplay(display_id);
if (display == nullptr) {
return {};
}
const u64 layer_id = next_layer_id++;
const u32 buffer_queue_id = next_buffer_queue_id++;
auto buffer_queue = std::make_shared<BufferQueue>(buffer_queue_id, layer_id);
display->CreateLayer(layer_id, buffer_queue);
buffer_queues.emplace_back(std::move(buffer_queue));
return layer_id;
}
std::optional<u32> NVFlinger::FindBufferQueueId(u64 display_id, u64 layer_id) const {
const auto* const layer = FindLayer(display_id, layer_id);
if (layer == nullptr) {
return {};
}
return layer->buffer_queue->GetId();
}
Kernel::SharedPtr<Kernel::ReadableEvent> NVFlinger::FindVsyncEvent(u64 display_id) const {
auto* const display = FindDisplay(display_id);
if (display == nullptr) {
return nullptr;
}
return display->GetVSyncEvent();
}
std::shared_ptr<BufferQueue> NVFlinger::FindBufferQueue(u32 id) const {
const auto itr = std::find_if(buffer_queues.begin(), buffer_queues.end(),
[&](const auto& queue) { return queue->GetId() == id; });
ASSERT(itr != buffer_queues.end());
return *itr;
}
VI::Display* NVFlinger::FindDisplay(u64 display_id) {
const auto itr =
std::find_if(displays.begin(), displays.end(),
[&](const VI::Display& display) { return display.GetID() == display_id; });
if (itr == displays.end()) {
return nullptr;
}
return &*itr;
}
const VI::Display* NVFlinger::FindDisplay(u64 display_id) const {
const auto itr =
std::find_if(displays.begin(), displays.end(),
[&](const VI::Display& display) { return display.GetID() == display_id; });
if (itr == displays.end()) {
return nullptr;
}
return &*itr;
}
VI::Layer* NVFlinger::FindLayer(u64 display_id, u64 layer_id) {
auto* const display = FindDisplay(display_id);
if (display == nullptr) {
return nullptr;
}
return display->FindLayer(layer_id);
}
const VI::Layer* NVFlinger::FindLayer(u64 display_id, u64 layer_id) const {
const auto* const display = FindDisplay(display_id);
if (display == nullptr) {
return nullptr;
}
return display->FindLayer(layer_id);
}
void NVFlinger::Compose() {
for (auto& display : displays) {
// Trigger vsync for this display at the end of drawing
SCOPE_EXIT({ display.SignalVSyncEvent(); });
// Don't do anything for displays without layers.
if (!display.HasLayers())
continue;
// TODO(Subv): Support more than 1 layer.
VI::Layer& layer = display.GetLayer(0);
auto& buffer_queue = layer.buffer_queue;
// Search for a queued buffer and acquire it
auto buffer = buffer_queue->AcquireBuffer();
MicroProfileFlip();
if (!buffer) {
auto& system_instance = Core::System::GetInstance();
// There was no queued buffer to draw, render previous frame
system_instance.GetPerfStats().EndGameFrame();
system_instance.Renderer().SwapBuffers({});
continue;
}
const auto& igbp_buffer = buffer->get().igbp_buffer;
// Now send the buffer to the GPU for drawing.
// TODO(Subv): Support more than just disp0. The display device selection is probably based
// on which display we're drawing (Default, Internal, External, etc)
auto nvdisp = nvdrv->GetDevice<Nvidia::Devices::nvdisp_disp0>("/dev/nvdisp_disp0");
ASSERT(nvdisp);
nvdisp->flip(igbp_buffer.gpu_buffer_id, igbp_buffer.offset, igbp_buffer.format,
igbp_buffer.width, igbp_buffer.height, igbp_buffer.stride,
buffer->get().transform, buffer->get().crop_rect);
buffer_queue->ReleaseBuffer(buffer->get().slot);
}
}
} // namespace Service::NVFlinger
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