Buffer queue: Correct behavior of free buffer.

This corrects the behavior of free buffer after witnessing it in an
unrelated hardware test. I haven't found any games affected by it but in
name of better accuracy we'll correct such behavior.
master
Fernando Sahmkow 2020-04-10 16:36:59 +07:00
parent 8adf66f9fd
commit 486a42c45a
2 changed files with 33 additions and 9 deletions

@ -28,6 +28,7 @@ void BufferQueue::SetPreallocatedBuffer(u32 slot, const IGBPBuffer& igbp_buffer)
buffer.slot = slot;
buffer.igbp_buffer = igbp_buffer;
buffer.status = Buffer::Status::Free;
free_buffers.push_back(slot);
queue.emplace_back(buffer);
buffer_wait_event.writable->Signal();
@ -35,16 +36,37 @@ void BufferQueue::SetPreallocatedBuffer(u32 slot, const IGBPBuffer& igbp_buffer)
std::optional<std::pair<u32, Service::Nvidia::MultiFence*>> 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) {
return false;
}
// Make sure that the parameters match.
return buffer.igbp_buffer.width == width && buffer.igbp_buffer.height == height;
});
if (free_buffers.empty()) {
return {};
}
auto f_itr = free_buffers.begin();
auto itr = queue.end();
while (f_itr != free_buffers.end()) {
auto slot = *f_itr;
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) {
return false;
}
if (buffer.slot != slot) {
return false;
}
// Make sure that the parameters match.
return buffer.igbp_buffer.width == width && buffer.igbp_buffer.height == height;
});
if (itr != queue.end()) {
free_buffers.erase(f_itr);
break;
}
++f_itr;
}
if (itr == queue.end()) {
return {};
@ -99,6 +121,7 @@ void BufferQueue::ReleaseBuffer(u32 slot) {
ASSERT(itr != queue.end());
ASSERT(itr->status == Buffer::Status::Acquired);
itr->status = Buffer::Status::Free;
free_buffers.push_back(slot);
buffer_wait_event.writable->Signal();
}

@ -101,6 +101,7 @@ private:
u32 id;
u64 layer_id;
std::list<u32> free_buffers;
std::vector<Buffer> queue;
std::list<u32> queue_sequence;
Kernel::EventPair buffer_wait_event;