surfaceflinger: Replace blank/unblank with setPowerMode
We replace the blank/unblank calls in surfaceFlinger with a more generic
setPowerMode() routine.
Some displays support different power modes (for example, with reduced
color palettes). Depending on the use case we should be able to toggle
these modes, so as to achieve incremental power savings.
Initially, three power modes will be supported:
- HWC_POWER_MODE_OFF
- HWC_POWER_MODE_DOZE
- HWC_POWER_MODE_NORMAL
HWC_POWER_MODE_OFF will correspond to blanking the display, while
HWC_POWER_MODE_NORMAL will correspond to unblanking. HWC_POWER_MODE_DOZE
will put the display into a low power setting, if it is supported in
hardware.
If such a low power mode is not supported, it should be treated as a
call to set the mode to HWC_POWER_MODE_NORMAL.
As a consequence of adding the mPowerMode field, the mScreenAcquired is
no longer required, and thus references to it are removed and replaced
equivalent references to mPowerMode.
We also add the glue code to connect the services invocation of setting
a power mode and the HAL implementation in HWComposer.
Bug: 13472578
Change-Id: I431595ecf16d2f2c94259272db3dd42f29636204
Signed-off-by: Prashant Malani <pmalani@google.com>
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index cc01eb3..996a795 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -205,13 +205,10 @@
Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
uint32_t minLayerZ, uint32_t maxLayerZ,
bool useIdentityTransform);
- // called when screen needs to turn off
- virtual void blank(const sp<IBinder>& display);
- // called when screen is turning back on
- virtual void unblank(const sp<IBinder>& display);
virtual status_t getDisplayConfigs(const sp<IBinder>& display,
Vector<DisplayInfo>* configs);
virtual int getActiveConfig(const sp<IBinder>& display);
+ virtual void setPowerMode(const sp<IBinder>& display, int mode);
virtual status_t setActiveConfig(const sp<IBinder>& display, int id);
virtual status_t clearAnimationFrameStats();
virtual status_t getAnimationFrameStats(FrameStats* outStats) const;
@@ -242,10 +239,8 @@
// called on the main thread in response to initializeDisplays()
void onInitializeDisplays();
- // called on the main thread in response to blank()
- void onScreenReleased(const sp<const DisplayDevice>& hw);
- // called on the main thread in response to unblank()
- void onScreenAcquired(const sp<const DisplayDevice>& hw);
+ // called on the main thread in response to setPowerMode()
+ void setPowerModeInternal(const sp<DisplayDevice>& hw, int mode);
void handleMessageTransaction();
void handleMessageInvalidate();