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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.
#ifndef UI_OZONE_PLATFORM_DRM_GPU_CRTC_CONTROLLER_H_
#define UI_OZONE_PLATFORM_DRM_GPU_CRTC_CONTROLLER_H_
#include <stddef.h>
#include <stdint.h>
#include <xf86drmMode.h>
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "ui/ozone/ozone_export.h"
#include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager.h"
#include "ui/ozone/platform/drm/gpu/overlay_plane.h"
#include "ui/ozone/platform/drm/gpu/scoped_drm_types.h"
namespace ui {
class DrmDevice;
class PageFlipObserver;
// Wrapper around a CRTC.
//
// One CRTC can be paired up with one or more connectors. The simplest
// configuration represents one CRTC driving one monitor, while pairing up a
// CRTC with multiple connectors results in hardware mirroring.
class OZONE_EXPORT CrtcController
: public base::SupportsWeakPtr<CrtcController> {
public:
CrtcController(const scoped_refptr<DrmDevice>& drm,
uint32_t crtc,
uint32_t connector);
~CrtcController();
uint32_t crtc() const { return crtc_; }
uint32_t connector() const { return connector_; }
const scoped_refptr<DrmDevice>& drm() const { return drm_; }
bool is_disabled() const { return is_disabled_; }
bool page_flip_pending() const { return page_flip_pending_; }
uint64_t time_of_last_flip() const { return time_of_last_flip_; }
drmModeCrtc* saved_crtc() const { return saved_crtc_.get(); }
// Perform the initial modesetting operation using |plane| as the buffer for
// the primary plane. The CRTC configuration is specified by |mode|.
bool Modeset(const OverlayPlane& plane, drmModeModeInfo mode);
// Disables the controller.
bool Disable();
// Schedule a page flip event and present the overlays in |planes|.
bool SchedulePageFlip(HardwareDisplayPlaneList* plane_list,
const OverlayPlaneList& planes);
// Called if the page flip for this CRTC fails after being scheduled.
void PageFlipFailed();
// Called when the page flip event occurred. The event is provided by the
// kernel when a VBlank event finished. This allows the controller to
// update internal state and propagate the update to the surface.
// The tuple (seconds, useconds) represents the event timestamp. |seconds|
// represents the number of seconds while |useconds| represents the
// microseconds (< 1 second) in the timestamp.
void OnPageFlipEvent(unsigned int frame,
unsigned int seconds,
unsigned int useconds);
bool SetCursor(const scoped_refptr<ScanoutBuffer>& buffer);
bool MoveCursor(const gfx::Point& location);
void AddObserver(PageFlipObserver* observer);
void RemoveObserver(PageFlipObserver* observer);
private:
bool ResetCursor();
scoped_refptr<DrmDevice> drm_;
HardwareDisplayPlaneManager* overlay_plane_manager_; // Not owned.
// Buffers need to be declared first so that they are destroyed last. Needed
// since the controllers may reference the buffers.
OverlayPlaneList current_planes_;
OverlayPlaneList pending_planes_;
scoped_refptr<ScanoutBuffer> cursor_buffer_;
uint32_t crtc_;
// TODO(dnicoara) Add support for hardware mirroring (multiple connectors).
uint32_t connector_;
drmModeModeInfo mode_;
// Store the state of the CRTC before we took over. Used to restore the CRTC
// once we no longer need it.
ScopedDrmCrtcPtr saved_crtc_;
// Keeps track of the CRTC state. If a surface has been bound, then the value
// is set to false. Otherwise it is true.
bool is_disabled_;
// True if a successful SchedulePageFlip occurred. Reset to false by a modeset
// operation or when the OnPageFlipEvent callback is triggered.
bool page_flip_pending_;
// The time of the last page flip event as reported by the kernel callback.
uint64_t time_of_last_flip_;
ObserverList<PageFlipObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(CrtcController);
};
} // namespace ui
#endif // UI_OZONE_PLATFORM_DRM_GPU_CRTC_CONTROLLER_H_
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