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vi: Remove DequeueBuffer and wait until next available buffer.

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This commit is contained in:
bunnei 2018-03-18 20:27:15 -04:00
parent c86af6939c
commit c1c92c30f9
3 changed files with 48 additions and 11 deletions
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25
src/core/hle/service/nvflinger/buffer_queue.cpp
View file

@ -26,24 +26,30 @@ void BufferQueue::SetPreallocatedBuffer(u32 slot, IGBPBuffer& igbp_buffer) {
LOG_WARNING(Service, "Adding graphics buffer %u", slot);
queue.emplace_back(buffer);
if (buffer_wait_event) {
buffer_wait_event->Signal();
}
}
u32 BufferQueue::DequeueBuffer(u32 pixel_format, u32 width, u32 height) {
boost::optional<u32> BufferQueue::DequeueBuffer(u32 width, u32 height) {
auto itr = std::find_if(queue.begin(), queue.end(), [&](const Buffer& buffer) {
// Only consider free buffers. Buffers become free once again after they've been Acquired
// and Released by the compositor, see the NVFlinger::Compose method.
if (buffer.status != Buffer::Status::Free)
if (buffer.status != Buffer::Status::Free) {
return false;
}
// Make sure that the parameters match.
return buffer.igbp_buffer.width == width && buffer.igbp_buffer.height == height;
});
if (itr == queue.end()) {
LOG_CRITICAL(Service_NVDRV, "no free buffers for pixel_format=%d, width=%d, height=%d",
pixel_format, width, height);
itr = queue.begin();
return boost::none;
}
buffer_wait_event = nullptr;
itr->status = Buffer::Status::Dequeued;
return itr->slot;
}
@ -81,6 +87,10 @@ void BufferQueue::ReleaseBuffer(u32 slot) {
ASSERT(itr != queue.end());
ASSERT(itr->status == Buffer::Status::Acquired);
itr->status = Buffer::Status::Free;
if (buffer_wait_event) {
buffer_wait_event->Signal();
}
}
u32 BufferQueue::Query(QueryType type) {
@ -96,5 +106,10 @@ u32 BufferQueue::Query(QueryType type) {
return 0;
}
void BufferQueue::SetBufferWaitEvent(Kernel::SharedPtr<Kernel::Event>&& wait_event) {
ASSERT_MSG(!buffer_wait_event, "buffer_wait_event only supports a single waiting thread!");
buffer_wait_event = std::move(wait_event);
}
} // namespace NVFlinger
} // namespace Service

6
src/core/hle/service/nvflinger/buffer_queue.h
View file

@ -69,12 +69,13 @@ public:
};
void SetPreallocatedBuffer(u32 slot, IGBPBuffer& buffer);
u32 DequeueBuffer(u32 pixel_format, u32 width, u32 height);
boost::optional<u32> DequeueBuffer(u32 width, u32 height);
const IGBPBuffer& RequestBuffer(u32 slot) const;
void QueueBuffer(u32 slot, BufferTransformFlags transform);
boost::optional<const Buffer&> AcquireBuffer();
void ReleaseBuffer(u32 slot);
u32 Query(QueryType type);
void SetBufferWaitEvent(Kernel::SharedPtr<Kernel::Event>&& wait_event);
u32 GetId() const {
return id;
@ -90,6 +91,9 @@ private:
std::vector<Buffer> queue;
Kernel::SharedPtr<Kernel::Event> native_handle;
/// Used to signal waiting thread when no buffers are available
Kernel::SharedPtr<Kernel::Event> buffer_wait_event;
};
} // namespace NVFlinger

28
src/core/hle/service/vi/vi.cpp
View file

@ -486,12 +486,30 @@ private:
ctx.WriteBuffer(response.Serialize());
} else if (transaction == TransactionId::DequeueBuffer) {
IGBPDequeueBufferRequestParcel request{ctx.ReadBuffer()};
const u32 width{request.data.width};
const u32 height{request.data.height};
boost::optional<u32> slot = buffer_queue->DequeueBuffer(width, height);
u32 slot = buffer_queue->DequeueBuffer(request.data.pixel_format, request.data.width,
request.data.height);
IGBPDequeueBufferResponseParcel response{slot};
ctx.WriteBuffer(response.Serialize());
if (slot != boost::none) {
// Buffer is available
IGBPDequeueBufferResponseParcel response{*slot};
ctx.WriteBuffer(response.Serialize());
} else {
// Wait the current thread until a buffer becomes available
auto wait_event = ctx.SleepClientThread(
Kernel::GetCurrentThread(), "IHOSBinderDriver::DequeueBuffer", -1,
[=](Kernel::SharedPtr<Kernel::Thread> thread, Kernel::HLERequestContext& ctx,
ThreadWakeupReason reason) {
// Repeat TransactParcel DequeueBuffer when a buffer is available
auto buffer_queue = nv_flinger->GetBufferQueue(id);
boost::optional<u32> slot = buffer_queue->DequeueBuffer(width, height);
IGBPDequeueBufferResponseParcel response{*slot};
ctx.WriteBuffer(response.Serialize());
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
});
buffer_queue->SetBufferWaitEvent(std::move(wait_event));
}
} else if (transaction == TransactionId::RequestBuffer) {
IGBPRequestBufferRequestParcel request{ctx.ReadBuffer()};