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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
#include <drm.h>
#include <string.h>
#include <xf86drm.h>
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/trace_event/trace_event.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/size.h"
#include "ui/ozone/platform/drm/gpu/crtc_controller.h"
#include "ui/ozone/platform/drm/gpu/drm_buffer.h"
#include "ui/ozone/platform/drm/gpu/drm_device.h"
#include "ui/ozone/public/native_pixmap.h"
namespace ui {
HardwareDisplayController::PageFlipRequest::PageFlipRequest(
const OverlayPlaneList& planes,
bool is_sync,
const base::Closure& callback)
: planes(planes), is_sync(is_sync), callback(callback) {
}
HardwareDisplayController::PageFlipRequest::~PageFlipRequest() {
}
HardwareDisplayController::HardwareDisplayController(
scoped_ptr<CrtcController> controller)
: is_disabled_(true) {
memset(&mode_, 0, sizeof(mode_));
AddCrtc(controller.Pass());
}
HardwareDisplayController::~HardwareDisplayController() {
// Reset the cursor.
UnsetCursor();
ClearPendingRequests();
}
bool HardwareDisplayController::Modeset(const OverlayPlane& primary,
drmModeModeInfo mode) {
TRACE_EVENT0("drm", "HDC::Modeset");
DCHECK(primary.buffer.get());
bool status = true;
for (size_t i = 0; i < crtc_controllers_.size(); ++i)
status &= crtc_controllers_[i]->Modeset(primary, mode);
is_disabled_ = false;
mode_ = mode;
current_planes_ = std::vector<OverlayPlane>(1, primary);
ClearPendingRequests();
// Because a page flip is pending we need to leave some state for the
// callback. We use the modeset state since it is the only valid state.
if (HasPendingPageFlips())
requests_.push_back(
PageFlipRequest(current_planes_, false, base::Bind(&base::DoNothing)));
return status;
}
bool HardwareDisplayController::Enable() {
TRACE_EVENT0("drm", "HDC::Enable");
DCHECK(!current_planes_.empty());
const OverlayPlane* primary = nullptr;
// Use the last scheduled buffer to modeset to preserve request order.
if (!requests_.empty())
primary = OverlayPlane::GetPrimaryPlane(requests_.back().planes);
else
primary = OverlayPlane::GetPrimaryPlane(current_planes_);
return Modeset(*primary, mode_);
}
void HardwareDisplayController::Disable() {
TRACE_EVENT0("drm", "HDC::Disable");
for (size_t i = 0; i < crtc_controllers_.size(); ++i)
crtc_controllers_[i]->Disable();
is_disabled_ = true;
}
void HardwareDisplayController::QueueOverlayPlane(const OverlayPlane& plane) {
pending_planes_.push_back(plane);
}
bool HardwareDisplayController::SchedulePageFlip(
bool is_sync,
const base::Closure& callback) {
TRACE_EVENT0("drm", "HDC::SchedulePageFlip");
// Ignore requests with no planes to schedule.
if (pending_planes_.empty()) {
callback.Run();
return true;
}
requests_.push_back(PageFlipRequest(pending_planes_, is_sync, callback));
pending_planes_.clear();
// A request is being serviced right now.
if (HasPendingPageFlips())
return true;
bool status = ActualSchedulePageFlip();
// No page flip event on failure so discard failed request.
if (!status)
requests_.pop_front();
return status;
}
bool HardwareDisplayController::SetCursor(
const scoped_refptr<ScanoutBuffer>& buffer) {
bool status = true;
if (is_disabled_)
return true;
for (size_t i = 0; i < crtc_controllers_.size(); ++i)
status &= crtc_controllers_[i]->SetCursor(buffer);
return status;
}
bool HardwareDisplayController::UnsetCursor() {
bool status = true;
for (size_t i = 0; i < crtc_controllers_.size(); ++i)
status &= crtc_controllers_[i]->SetCursor(nullptr);
return status;
}
bool HardwareDisplayController::MoveCursor(const gfx::Point& location) {
if (is_disabled_)
return true;
bool status = true;
for (size_t i = 0; i < crtc_controllers_.size(); ++i)
status &= crtc_controllers_[i]->MoveCursor(location);
return status;
}
void HardwareDisplayController::AddCrtc(scoped_ptr<CrtcController> controller) {
owned_hardware_planes_.add(
controller->drm().get(),
scoped_ptr<HardwareDisplayPlaneList>(new HardwareDisplayPlaneList()));
controller->AddObserver(this);
crtc_controllers_.push_back(controller.release());
}
scoped_ptr<CrtcController> HardwareDisplayController::RemoveCrtc(
const scoped_refptr<DrmDevice>& drm,
uint32_t crtc) {
for (ScopedVector<CrtcController>::iterator it = crtc_controllers_.begin();
it != crtc_controllers_.end(); ++it) {
if ((*it)->drm() == drm && (*it)->crtc() == crtc) {
scoped_ptr<CrtcController> controller(*it);
crtc_controllers_.weak_erase(it);
// Remove entry from |owned_hardware_planes_| iff no other crtcs share it.
bool found = false;
for (ScopedVector<CrtcController>::iterator it =
crtc_controllers_.begin();
it != crtc_controllers_.end(); ++it) {
if ((*it)->drm() == controller->drm()) {
found = true;
break;
}
}
if (!found)
owned_hardware_planes_.erase(controller->drm().get());
controller->RemoveObserver(this);
// If a display configuration happens mid page flip we want to make sure
// the HDC won't wait for an event from a CRTC that is no longer
// associated with it.
if (controller->page_flip_pending())
OnPageFlipEvent();
return controller.Pass();
}
}
return nullptr;
}
bool HardwareDisplayController::HasCrtc(const scoped_refptr<DrmDevice>& drm,
uint32_t crtc) const {
for (size_t i = 0; i < crtc_controllers_.size(); ++i)
if (crtc_controllers_[i]->drm() == drm &&
crtc_controllers_[i]->crtc() == crtc)
return true;
return false;
}
bool HardwareDisplayController::IsMirrored() const {
return crtc_controllers_.size() > 1;
}
bool HardwareDisplayController::IsDisabled() const {
return is_disabled_;
}
gfx::Size HardwareDisplayController::GetModeSize() const {
return gfx::Size(mode_.hdisplay, mode_.vdisplay);
}
uint64_t HardwareDisplayController::GetTimeOfLastFlip() const {
uint64_t time = 0;
for (size_t i = 0; i < crtc_controllers_.size(); ++i)
if (time < crtc_controllers_[i]->time_of_last_flip())
time = crtc_controllers_[i]->time_of_last_flip();
return time;
}
void HardwareDisplayController::OnPageFlipEvent() {
TRACE_EVENT0("drm", "HDC::OnPageFlipEvent");
// OnPageFlipEvent() needs to handle 2 cases:
// 1) Normal page flips in which case:
// a) HasPendingPageFlips() may return false if we're in mirror mode and
// one of the CRTCs hasn't finished page flipping. In this case we want
// to wait for all the CRTCs.
// b) HasPendingPageFlips() returns true in which case all CRTCs are ready
// for the next request. In this case we expect that |requests_| isn't
// empty.
// 2) A CRTC was added while it was page flipping. In this case a modeset
// must be performed. Modesetting clears all pending requests, however the
// CRTCs will honor the scheduled page flip. Thus we need to handle page
// flip events with no requests.
if (HasPendingPageFlips())
return;
if (!requests_.empty())
ProcessPageFlipRequest();
// ProcessPageFlipRequest() consumes a request.
if (requests_.empty())
return;
// At this point we still have requests pending, so schedule the next request.
bool status = ActualSchedulePageFlip();
if (!status) {
PageFlipRequest request = requests_.front();
requests_.pop_front();
// Normally the caller would handle the error call, but because we're in a
// delayed schedule the initial SchedulePageFlip() already returned true,
// thus we need to run the callback.
request.callback.Run();
}
}
scoped_refptr<DrmDevice> HardwareDisplayController::GetAllocationDrmDevice()
const {
DCHECK(!crtc_controllers_.empty());
// TODO(dnicoara) When we support mirroring across DRM devices, figure out
// which device should be used for allocations.
return crtc_controllers_[0]->drm();
}
bool HardwareDisplayController::HasPendingPageFlips() const {
for (size_t i = 0; i < crtc_controllers_.size(); ++i)
if (crtc_controllers_[i]->page_flip_pending())
return true;
return false;
}
bool HardwareDisplayController::ActualSchedulePageFlip() {
TRACE_EVENT0("drm", "HDC::ActualSchedulePageFlip");
DCHECK(!requests_.empty());
if (is_disabled_) {
ProcessPageFlipRequest();
return true;
}
OverlayPlaneList pending_planes = requests_.front().planes;
std::sort(pending_planes.begin(), pending_planes.end(),
[](const OverlayPlane& l, const OverlayPlane& r) {
return l.z_order < r.z_order;
});
bool status = true;
for (size_t i = 0; i < crtc_controllers_.size(); ++i) {
status &= crtc_controllers_[i]->SchedulePageFlip(
owned_hardware_planes_.get(crtc_controllers_[i]->drm().get()),
pending_planes);
}
bool is_sync = requests_.front().is_sync;
for (const auto& planes : owned_hardware_planes_) {
if (!planes.first->plane_manager()->Commit(planes.second, is_sync)) {
status = false;
}
}
return status;
}
void HardwareDisplayController::ProcessPageFlipRequest() {
DCHECK(!requests_.empty());
PageFlipRequest request = requests_.front();
requests_.pop_front();
current_planes_.swap(request.planes);
request.callback.Run();
}
void HardwareDisplayController::ClearPendingRequests() {
while (!requests_.empty()) {
PageFlipRequest request = requests_.front();
requests_.pop_front();
request.callback.Run();
}
}
} // namespace ui
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