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Commit 0e177a2a authored by Manoj Kumar AVM's avatar Manoj Kumar AVM Committed by Linux Build Service Account
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sf: Do not allow hardware acceleration for VDS 

Do not allow hardware acceleration for Virtual display if Platform
doesn't support writeback.

CRs-Fixed: 1031674
Change-Id: I343ae97adc552b6f2f8c08967f5768babb4abd70
parent 81f91ce4

services/surfaceflinger/DisplayUtils.cpp

+43 −3
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ bool DisplayUtils::sUseExtendedImpls = false; 
DisplayUtils::DisplayUtils() {

#ifdef QTI_BSP

    sUseExtendedImpls = true;

    hasWbNode();

#endif

}
@@ -172,11 +173,50 @@ bool DisplayUtils::canAllocateHwcDisplayIdForVDS(int usage) { 
    int allowHwcForVDS = atoi(value);



#if QTI_BSP

    // Reserve hardware acceleration for WFD use-case

    flag_mask = GRALLOC_USAGE_PRIVATE_WFD;

    // Do not allow hardware acceleration

    flag_mask = 0;

#endif



    return allowHwcForVDS || (usage & flag_mask);

    return mHasWbNode && (allowHwcForVDS || (usage & flag_mask));

}



int DisplayUtils::getNumFbNodes() {

    int i = 0;

    while (hasFbNode(i)) i++;

    return i;

}



bool DisplayUtils::hasFbNode(int index) {

    char filename[kMaxStringLength];

    snprintf(filename, kMaxStringLength, "/dev/graphics/fb%d", index);

    int fd = open(filename, O_RDONLY);

    if (fd < 0) {

        return false;

    }

    close(fd);

    return true;

}



bool DisplayUtils::hasWbNode() {

    int fbNum = getNumFbNodes();

    char msmFbType [kMaxStringLength];

    char fbType [kMaxStringLength];

    FILE *displayPanelFP = NULL;

    mHasWbNode = false;



    for (int i = 0; i < fbNum; i++) {

        snprintf (msmFbType,MAX_FRAME_BUFFER_NAME_SIZE, "/sys/class/graphics/fb%d/msm_fb_type", i);

        displayPanelFP = fopen(msmFbType, "r");

        if(displayPanelFP) {

            fread(fbType, sizeof(char), MAX_FRAME_BUFFER_NAME_SIZE, displayPanelFP);

            fclose(displayPanelFP);

            if(strncmp(fbType, "writeback panel", strlen("writeback panel")) == 0) {

                mHasWbNode = true;

                break;

            }

        }

    }

    return mHasWbNode;

}



}; // namespace android

services/surfaceflinger/DisplayUtils.h

+7 −0
Original line number Diff line number Diff line
@@ -46,6 +46,8 @@ class IGraphicBufferConsumer; 
class DisplaySurface;



/* Factory Classes */

#define kMaxStringLength (1024)

#define MAX_FRAME_BUFFER_NAME_SIZE (80)



class DisplayUtils {

  public:
@@ -66,12 +68,17 @@ class DisplayUtils { 
  private:

    static DisplayUtils* sDisplayUtils;

    static bool sUseExtendedImpls;

    bool mHasWbNode;



    bool createV4L2BasedVirtualDisplay(HWComposer* hwc, int32_t &hwcDisplayId,

                   sp<DisplaySurface> &dispSurface, sp<IGraphicBufferProducer> &producer,

                   sp<IGraphicBufferProducer> currentStateSurface,

                   sp<IGraphicBufferProducer> bqProducer,

                   sp<IGraphicBufferConsumer> bqConsumer, int currentStateType);



    bool hasWbNode();

    bool hasFbNode(int index);

    int getNumFbNodes();

};



}; // namespace android