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Commit 10fbdb60 authored by Colin Cross's avatar Colin Cross
Browse files

surfaceflinger: call into hardware composer to blank screen 

Call into the new HWC blank operation to blank or unblank the screen.
Legacy systems may have already blanked the screen via early suspend,
and can choose to not implement the blank operation in their hardware
composer implementation.

Change-Id: Ib403c8c0e36367a2cfef3e1d124872fcfeb9e7cb
parent c5c5a14c

services/surfaceflinger/DisplayHardware.cpp

+3 −0
Original line number Diff line number Diff line
@@ -434,6 +434,9 @@ void DisplayHardware::releaseScreen() const 


void DisplayHardware::acquireScreen() const

{

    if (mHwc->initCheck() == NO_ERROR) {

        mHwc->acquire();

    }

    DisplayHardwareBase::acquireScreen();

}

services/surfaceflinger/DisplayHardware/HWComposer.cpp

+22 −0
Original line number Diff line number Diff line
@@ -286,8 +286,30 @@ status_t HWComposer::release() const { 
            mHwc->methods->eventControl(mHwc, HWC_EVENT_VSYNC, 0);

        }

        int err = mHwc->set(mHwc, NULL, NULL, NULL);

        if (err < 0) {

            return (status_t)err;

        }



        if (hwcHasVersion(mHwc, HWC_DEVICE_API_VERSION_1_0)) {

            if (mHwc->methods && mHwc->methods->blank) {

                err = mHwc->methods->blank(mHwc, 1);

            }

        }

        return (status_t)err;

    }

    return NO_ERROR;

}



status_t HWComposer::acquire() const {

    if (mHwc) {

        if (hwcHasVersion(mHwc, HWC_DEVICE_API_VERSION_1_0)) {

            if (mHwc->methods && mHwc->methods->blank) {

                int err = mHwc->methods->blank(mHwc, 0);

                return (status_t)err;

            }

        }

    }



    return NO_ERROR;

}

services/surfaceflinger/DisplayHardware/HWComposer.h

+4 −1
Original line number Diff line number Diff line
@@ -71,9 +71,12 @@ public: 
    // commits the list

    status_t commit() const;



    // release hardware resources

    // release hardware resources and blank screen

    status_t release() const;



    // acquire hardware resources and unblank screen

    status_t acquire() const;



    // create a work list for numLayers layer. sets HWC_GEOMETRY_CHANGED.

    status_t createWorkList(size_t numLayers);