libhwcomposer/hwc_mdpcomp.cpp

/*
 * Copyright (C) 2012-2013, The Linux Foundation. All rights reserved.
 * Not a Contribution, Apache license notifications and license are retained
 * for attribution purposes only.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "hwc_mdpcomp.h"
#include <sys/ioctl.h>
#include "external.h"
#include "qdMetaData.h"
#include "mdp_version.h"
#include <overlayRotator.h>

using overlay::Rotator;
using namespace overlay::utils;
namespace ovutils = overlay::utils;

namespace qhwc {

//==============MDPComp========================================================

IdleInvalidator *MDPComp::idleInvalidator = NULL;
bool MDPComp::sIdleFallBack = false;
bool MDPComp::sDebugLogs = false;
bool MDPComp::sEnabled = false;

MDPComp* MDPComp::getObject(const int& width) {
    if(width <= MAX_DISPLAY_DIM) {
        return new MDPCompLowRes();
    } else {
        return new MDPCompHighRes();
    }
}

void MDPComp::dump(android::String8& buf)
{
    dumpsys_log(buf, "  MDP Composition: ");
    dumpsys_log(buf, "MDPCompState=%d\n", mState);
    //XXX: Log more info
}

bool MDPComp::init(hwc_context_t *ctx) {

    if(!ctx) {
        ALOGE("%s: Invalid hwc context!!",__FUNCTION__);
        return false;
    }

    if(!setupBasePipe(ctx)) {
        ALOGE("%s: Failed to setup primary base pipe", __FUNCTION__);
        return false;
    }

    char property[PROPERTY_VALUE_MAX];

    sEnabled = false;
    if((property_get("persist.hwc.mdpcomp.enable", property, NULL) > 0) &&
            (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
             (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
        sEnabled = true;
    }

    sDebugLogs = false;
    if(property_get("debug.mdpcomp.logs", property, NULL) > 0) {
        if(atoi(property) != 0)
            sDebugLogs = true;
    }

    unsigned long idle_timeout = DEFAULT_IDLE_TIME;
    if(property_get("debug.mdpcomp.idletime", property, NULL) > 0) {
        if(atoi(property) != 0)
            idle_timeout = atoi(property);
    }

    //create Idle Invalidator
    idleInvalidator = IdleInvalidator::getInstance();

    if(idleInvalidator == NULL) {
        ALOGE("%s: failed to instantiate idleInvalidator  object", __FUNCTION__);
    } else {
        idleInvalidator->init(timeout_handler, ctx, idle_timeout);
    }
    return true;
}

void MDPComp::timeout_handler(void *udata) {
    struct hwc_context_t* ctx = (struct hwc_context_t*)(udata);

    if(!ctx) {
        ALOGE("%s: received empty data in timer callback", __FUNCTION__);
        return;
    }

    if(!ctx->proc) {
        ALOGE("%s: HWC proc not registered", __FUNCTION__);
        return;
    }
    sIdleFallBack = true;
    /* Trigger SF to redraw the current frame */
    ctx->proc->invalidate(ctx->proc);
}

void MDPComp::setMDPCompLayerFlags(hwc_context_t *ctx,
        hwc_display_contents_1_t* list) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    LayerProp *layerProp = ctx->layerProp[dpy];

    for(int index = 0; index < ctx->listStats[dpy].numAppLayers; index++ ) {
        hwc_layer_1_t* layer = &(list->hwLayers[index]);
        layerProp[index].mFlags |= HWC_MDPCOMP;
        layer->compositionType = HWC_OVERLAY;
        layer->hints |= HWC_HINT_CLEAR_FB;
    }
}

void MDPComp::unsetMDPCompLayerFlags(hwc_context_t* ctx,
        hwc_display_contents_1_t* list) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    LayerProp *layerProp = ctx->layerProp[dpy];

    for (int index = 0 ;
            index < ctx->listStats[dpy].numAppLayers; index++) {
        if(layerProp[index].mFlags & HWC_MDPCOMP) {
            layerProp[index].mFlags &= ~HWC_MDPCOMP;
        }

        if(list->hwLayers[index].compositionType == HWC_OVERLAY) {
            list->hwLayers[index].compositionType = HWC_FRAMEBUFFER;
        }
    }
}

/*
 * Sets up BORDERFILL as default base pipe and detaches RGB0.
 * Framebuffer is always updated using PLAY ioctl.
 */
bool MDPComp::setupBasePipe(hwc_context_t *ctx) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    int fb_stride = ctx->dpyAttr[dpy].stride;
    int fb_width = ctx->dpyAttr[dpy].xres;
    int fb_height = ctx->dpyAttr[dpy].yres;
    int fb_fd = ctx->dpyAttr[dpy].fd;

    mdp_overlay ovInfo;
    msmfb_overlay_data ovData;
    memset(&ovInfo, 0, sizeof(mdp_overlay));
    memset(&ovData, 0, sizeof(msmfb_overlay_data));

    ovInfo.src.format = MDP_RGB_BORDERFILL;
    ovInfo.src.width  = fb_width;
    ovInfo.src.height = fb_height;
    ovInfo.src_rect.w = fb_width;
    ovInfo.src_rect.h = fb_height;
    ovInfo.dst_rect.w = fb_width;
    ovInfo.dst_rect.h = fb_height;
    ovInfo.id = MSMFB_NEW_REQUEST;

    if (ioctl(fb_fd, MSMFB_OVERLAY_SET, &ovInfo) < 0) {
        ALOGE("Failed to call ioctl MSMFB_OVERLAY_SET err=%s",
                strerror(errno));
        return false;
    }

    ovData.id = ovInfo.id;
    if (ioctl(fb_fd, MSMFB_OVERLAY_PLAY, &ovData) < 0) {
        ALOGE("Failed to call ioctl MSMFB_OVERLAY_PLAY err=%s",
                strerror(errno));
        return false;
    }
    return true;
}

void MDPComp::reset(hwc_context_t *ctx,
        hwc_display_contents_1_t* list ) {
    //Reset flags and states
    unsetMDPCompLayerFlags(ctx, list);
    if(mCurrentFrame.pipeLayer) {
        for(int i = 0 ; i < mCurrentFrame.count; i++ ) {
            if(mCurrentFrame.pipeLayer[i].pipeInfo) {
                delete mCurrentFrame.pipeLayer[i].pipeInfo;
                mCurrentFrame.pipeLayer[i].pipeInfo = NULL;
                //We dont own the rotator
                mCurrentFrame.pipeLayer[i].rot = NULL;
            }
        }
        free(mCurrentFrame.pipeLayer);
        mCurrentFrame.pipeLayer = NULL;
    }
    mCurrentFrame.count = 0;
}

bool MDPComp::isWidthValid(hwc_context_t *ctx, hwc_layer_1_t *layer) {

    const int dpy = HWC_DISPLAY_PRIMARY;
    private_handle_t *hnd = (private_handle_t *)layer->handle;

    if(!hnd) {
        ALOGE("%s: layer handle is NULL", __FUNCTION__);
        return false;
    }

    int hw_w = ctx->dpyAttr[dpy].xres;
    int hw_h = ctx->dpyAttr[dpy].yres;

    hwc_rect_t sourceCrop = layer->sourceCrop;
    hwc_rect_t displayFrame = layer->displayFrame;

    hwc_rect_t crop =  sourceCrop;
    int crop_w = crop.right - crop.left;
    int crop_h = crop.bottom - crop.top;

    hwc_rect_t dst = displayFrame;
    int dst_w = dst.right - dst.left;
    int dst_h = dst.bottom - dst.top;

    if(dst.left < 0 || dst.top < 0 || dst.right > hw_w || dst.bottom > hw_h) {
       hwc_rect_t scissor = {0, 0, hw_w, hw_h };
       qhwc::calculate_crop_rects(crop, dst, scissor, layer->transform);
       crop_w = crop.right - crop.left;
       crop_h = crop.bottom - crop.top;
    }

    //Workaround for MDP HW limitation in DSI command mode panels where
    //FPS will not go beyond 30 if buffers on RGB pipes are of width < 5

    if(crop_w < 5)
        return false;

    return true;
}

ovutils::eDest MDPComp::getMdpPipe(hwc_context_t *ctx, ePipeType type) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    overlay::Overlay& ov = *ctx->mOverlay;
    ovutils::eDest mdp_pipe = ovutils::OV_INVALID;

    switch(type) {
        case MDPCOMP_OV_DMA:
            mdp_pipe = ov.nextPipe(ovutils::OV_MDP_PIPE_DMA, dpy);
            if(mdp_pipe != ovutils::OV_INVALID) {
                ctx->mDMAInUse = true;
                return mdp_pipe;
            }
        case MDPCOMP_OV_ANY:
        case MDPCOMP_OV_RGB:
            mdp_pipe = ov.nextPipe(ovutils::OV_MDP_PIPE_RGB, dpy);
            if(mdp_pipe != ovutils::OV_INVALID) {
                return mdp_pipe;
            }

            if(type == MDPCOMP_OV_RGB) {
                //Requested only for RGB pipe
                break;
            }
        case  MDPCOMP_OV_VG:
            return ov.nextPipe(ovutils::OV_MDP_PIPE_VG, dpy);
        default:
            ALOGE("%s: Invalid pipe type",__FUNCTION__);
            return ovutils::OV_INVALID;
    };
    return ovutils::OV_INVALID;
}

bool MDPComp::isDoable(hwc_context_t *ctx,
        hwc_display_contents_1_t* list) {
    //Number of layers
    const int dpy = HWC_DISPLAY_PRIMARY;
    int numAppLayers = ctx->listStats[dpy].numAppLayers;
    int numDMAPipes = qdutils::MDPVersion::getInstance().getDMAPipes();

    overlay::Overlay& ov = *ctx->mOverlay;
    int availablePipes = ov.availablePipes(dpy);

    if(ctx->mNeedsRotator)
        availablePipes -= numDMAPipes;

    if(numAppLayers < 1 || numAppLayers > MAX_PIPES_PER_MIXER ||
                           pipesNeeded(ctx, list) > availablePipes) {
        ALOGD_IF(isDebug(), "%s: Unsupported number of layers",__FUNCTION__);
        return false;
    }

    if(ctx->mExtDispConfiguring) {
        ALOGD_IF( isDebug(),"%s: External Display connection is pending",
                __FUNCTION__);
        return false;
    }

    if(isSecuring(ctx)) {
        ALOGD_IF(isDebug(), "%s: MDP securing is active", __FUNCTION__);
        return false;
    }

    if(ctx->mSecureMode)
        return false;

    //Check for skip layers
    if(isSkipPresent(ctx, dpy)) {
        ALOGD_IF(isDebug(), "%s: Skip layers are present",__FUNCTION__);
        return false;
    }

    if(ctx->listStats[dpy].needsAlphaScale
                     && ctx->mMDP.version < qdutils::MDSS_V5) {
        ALOGD_IF(isDebug(), "%s: frame needs alpha downscaling",__FUNCTION__);
        return false;
    }

    //FB composition on idle timeout
    if(sIdleFallBack) {
        sIdleFallBack = false;
        ALOGD_IF(isDebug(), "%s: idle fallback",__FUNCTION__);
        return false;
    }

    if(ctx->mNeedsRotator && ctx->mDMAInUse) {
        ALOGD_IF(isDebug(), "%s: DMA not available for Rotator",__FUNCTION__);
        return false;
    }

    //MDP composition is not efficient if layer needs rotator.
    for(int i = 0; i < numAppLayers; ++i) {
        // As MDP h/w supports flip operation, use MDP comp only for
        // 180 transforms. Fail for any transform involving 90 (90, 270).
        hwc_layer_1_t* layer = &list->hwLayers[i];
        private_handle_t *hnd = (private_handle_t *)layer->handle;

        if(layer->transform & HWC_TRANSFORM_ROT_90 && !isYuvBuffer(hnd)) {
            ALOGD_IF(isDebug(), "%s: orientation involved",__FUNCTION__);
            return false;
        }

        if(!isYuvBuffer(hnd) && !isWidthValid(ctx,layer)) {
            ALOGD_IF(isDebug(), "%s: Buffer is of invalid width",__FUNCTION__);
            return false;
        }
    }
    return true;
}

bool MDPComp::setup(hwc_context_t* ctx, hwc_display_contents_1_t* list) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    if(!ctx) {
        ALOGE("%s: invalid context", __FUNCTION__);
        return -1;
    }

    ctx->mDMAInUse = false;
    if(!allocLayerPipes(ctx, list, mCurrentFrame)) {
        ALOGD_IF(isDebug(), "%s: Falling back to FB", __FUNCTION__);
        return false;
    }

    for (int index = 0 ; index < mCurrentFrame.count; index++) {
        hwc_layer_1_t* layer = &list->hwLayers[index];
        if(configure(ctx, layer, mCurrentFrame.pipeLayer[index]) != 0 ) {
            ALOGD_IF(isDebug(), "%s: MDPComp failed to configure overlay for \
                    layer %d",__FUNCTION__, index);
            return false;
        }
    }
    return true;
}

bool MDPComp::prepare(hwc_context_t *ctx,
        hwc_display_contents_1_t* list) {
    if(!isEnabled()) {
        ALOGE_IF(isDebug(),"%s: MDP Comp. not enabled.", __FUNCTION__);
        return false;
    }

    overlay::Overlay& ov = *ctx->mOverlay;
    bool isMDPCompUsed = true;

    //reset old data
    reset(ctx, list);

    bool doable = isDoable(ctx, list);
    if(doable) {
        if(setup(ctx, list)) {
            setMDPCompLayerFlags(ctx, list);
        } else {
            ALOGD_IF(isDebug(),"%s: MDP Comp Failed",__FUNCTION__);
            isMDPCompUsed = false;
        }
    } else {
        ALOGD_IF( isDebug(),"%s: MDP Comp not possible[%d]",__FUNCTION__,
                doable);
        isMDPCompUsed = false;
    }

    //Reset states
    if(!isMDPCompUsed) {
        //Reset current frame
        reset(ctx, list);
    }

    mState = isMDPCompUsed ? MDPCOMP_ON : MDPCOMP_OFF;
    return isMDPCompUsed;
}

//=============MDPCompLowRes===================================================

/*
 * Configures pipe(s) for MDP composition
 */
int MDPCompLowRes::configure(hwc_context_t *ctx, hwc_layer_1_t *layer,
        PipeLayerPair& pipeLayerPair) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    MdpPipeInfoLowRes& mdp_info =
            *(static_cast<MdpPipeInfoLowRes*>(pipeLayerPair.pipeInfo));
    eMdpFlags mdpFlags = OV_MDP_BACKEND_COMPOSITION;
    eZorder zOrder = static_cast<eZorder>(mdp_info.zOrder);
    eIsFg isFg = IS_FG_OFF;
    eDest dest = mdp_info.index;

    return configureLowRes(ctx, layer, dpy, mdpFlags, zOrder, isFg, dest,
            &pipeLayerPair.rot);
}

int MDPCompLowRes::pipesNeeded(hwc_context_t *ctx,
                        hwc_display_contents_1_t* list) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    return ctx->listStats[dpy].numAppLayers;
}

bool MDPCompLowRes::allocLayerPipes(hwc_context_t *ctx,
        hwc_display_contents_1_t* list,
        FrameInfo& currentFrame) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    overlay::Overlay& ov = *ctx->mOverlay;
    int layer_count = ctx->listStats[dpy].numAppLayers;

    currentFrame.count = layer_count;
    currentFrame.pipeLayer = (PipeLayerPair*)
            malloc(sizeof(PipeLayerPair) * currentFrame.count);

    if(isYuvPresent(ctx, dpy)) {
        int nYuvCount = ctx->listStats[dpy].yuvCount;

        for(int index = 0; index < nYuvCount; index ++) {
            int nYuvIndex = ctx->listStats[dpy].yuvIndices[index];
            hwc_layer_1_t* layer = &list->hwLayers[nYuvIndex];
            PipeLayerPair& info = currentFrame.pipeLayer[nYuvIndex];
            info.pipeInfo = new MdpPipeInfoLowRes;
            info.rot = NULL;
            MdpPipeInfoLowRes& pipe_info = *(MdpPipeInfoLowRes*)info.pipeInfo;
            pipe_info.index = getMdpPipe(ctx, MDPCOMP_OV_VG);
            if(pipe_info.index == ovutils::OV_INVALID) {
                ALOGD_IF(isDebug(), "%s: Unable to get pipe for Videos",
                        __FUNCTION__);
                return false;
            }
            pipe_info.zOrder = nYuvIndex;
        }
    }

    for(int index = 0 ; index < layer_count ; index++ ) {
        hwc_layer_1_t* layer = &list->hwLayers[index];
        private_handle_t *hnd = (private_handle_t *)layer->handle;

        if(isYuvBuffer(hnd))
            continue;

        PipeLayerPair& info = currentFrame.pipeLayer[index];
        info.pipeInfo = new MdpPipeInfoLowRes;
        info.rot = NULL;
        MdpPipeInfoLowRes& pipe_info = *(MdpPipeInfoLowRes*)info.pipeInfo;

        ePipeType type = MDPCOMP_OV_ANY;

        if(!qhwc::needsScaling(layer) && !ctx->mNeedsRotator
                             && ctx->mMDP.version >= qdutils::MDSS_V5) {
            type = MDPCOMP_OV_DMA;
        }

        pipe_info.index = getMdpPipe(ctx, type);
        if(pipe_info.index == ovutils::OV_INVALID) {
            ALOGD_IF(isDebug(), "%s: Unable to get pipe for UI", __FUNCTION__);
            return false;
        }
        pipe_info.zOrder = index;
    }
    return true;
}

bool MDPCompLowRes::draw(hwc_context_t *ctx, hwc_display_contents_1_t* list) {

    if(!isEnabled() || !isUsed()) {
        ALOGD_IF(isDebug(),"%s: MDP Comp not configured", __FUNCTION__);
        return true;
    }

    if(!ctx || !list) {
        ALOGE("%s: invalid contxt or list",__FUNCTION__);
        return false;
    }

    /* reset Invalidator */
    if(idleInvalidator)
        idleInvalidator->markForSleep();

    const int dpy = HWC_DISPLAY_PRIMARY;
    overlay::Overlay& ov = *ctx->mOverlay;
    LayerProp *layerProp = ctx->layerProp[dpy];

    int numHwLayers = ctx->listStats[dpy].numAppLayers;
    for(int i = 0; i < numHwLayers; i++ )
    {
        hwc_layer_1_t *layer = &list->hwLayers[i];
        private_handle_t *hnd = (private_handle_t *)layer->handle;
        if(!hnd) {
            ALOGE("%s handle null", __FUNCTION__);
            return false;
        }

        MdpPipeInfoLowRes& pipe_info =
                *(MdpPipeInfoLowRes*)mCurrentFrame.pipeLayer[i].pipeInfo;
        ovutils::eDest dest = pipe_info.index;
        if(dest == ovutils::OV_INVALID) {
            ALOGE("%s: Invalid pipe index (%d)", __FUNCTION__, dest);
            return false;
        }

        if(!(layerProp[i].mFlags & HWC_MDPCOMP)) {
            continue;
        }

        ALOGD_IF(isDebug(),"%s: MDP Comp: Drawing layer: %p hnd: %p \
                using  pipe: %d", __FUNCTION__, layer,
                hnd, dest );

        int fd = hnd->fd;
        uint32_t offset = hnd->offset;
        Rotator *rot = mCurrentFrame.pipeLayer[i].rot;
        if(rot) {
            if(!rot->queueBuffer(fd, offset))
                return false;
            fd = rot->getDstMemId();
            offset = rot->getDstOffset();
        }

        if (!ov.queueBuffer(fd, offset, dest)) {
            ALOGE("%s: queueBuffer failed for external", __FUNCTION__);
            return false;
        }

        layerProp[i].mFlags &= ~HWC_MDPCOMP;
    }
    return true;
}

//=============MDPCompHighRes===================================================

int MDPCompHighRes::pipesNeeded(hwc_context_t *ctx,
                        hwc_display_contents_1_t* list) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    int numAppLayers = ctx->listStats[dpy].numAppLayers;
    int pipesNeeded = 0;

    int hw_w = ctx->dpyAttr[dpy].xres;

    for(int i = 0; i < numAppLayers; ++i) {
        hwc_layer_1_t* layer = &list->hwLayers[i];
        hwc_rect_t dst = layer->displayFrame;
      if(dst.left > hw_w/2) {
          pipesNeeded++;
      } else if(dst.right <= hw_w/2) {
          pipesNeeded++;
      } else {
          pipesNeeded += 2;
      }
    }
    return pipesNeeded;
}

bool MDPCompHighRes::acquireMDPPipes(hwc_context_t *ctx, hwc_layer_1_t* layer,
                        MdpPipeInfoHighRes& pipe_info, ePipeType type) {
     const int dpy = HWC_DISPLAY_PRIMARY;
     int hw_w = ctx->dpyAttr[dpy].xres;

     hwc_rect_t dst = layer->displayFrame;
     if(dst.left > hw_w/2) {
         pipe_info.lIndex = ovutils::OV_INVALID;
         pipe_info.rIndex = getMdpPipe(ctx, type);
         if(pipe_info.rIndex == ovutils::OV_INVALID)
             return false;
     } else if (dst.right <= hw_w/2) {
         pipe_info.rIndex = ovutils::OV_INVALID;
         pipe_info.lIndex = getMdpPipe(ctx, type);
         if(pipe_info.lIndex == ovutils::OV_INVALID)
             return false;
     } else {
         pipe_info.rIndex = getMdpPipe(ctx, type);
         pipe_info.lIndex = getMdpPipe(ctx, type);
         if(pipe_info.rIndex == ovutils::OV_INVALID ||
            pipe_info.lIndex == ovutils::OV_INVALID)
             return false;
     }
     return true;
}

bool MDPCompHighRes::allocLayerPipes(hwc_context_t *ctx,
        hwc_display_contents_1_t* list,
        FrameInfo& currentFrame) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    overlay::Overlay& ov = *ctx->mOverlay;
    int layer_count = ctx->listStats[dpy].numAppLayers;

    currentFrame.count = layer_count;
    currentFrame.pipeLayer = (PipeLayerPair*)
            malloc(sizeof(PipeLayerPair) * currentFrame.count);

    if(isYuvPresent(ctx, dpy)) {
        int nYuvCount = ctx->listStats[dpy].yuvCount;

        for(int index = 0; index < nYuvCount; index ++) {
            int nYuvIndex = ctx->listStats[dpy].yuvIndices[index];
            hwc_layer_1_t* layer = &list->hwLayers[nYuvIndex];
            PipeLayerPair& info = currentFrame.pipeLayer[nYuvIndex];
            info.pipeInfo = new MdpPipeInfoHighRes;
            info.rot = NULL;
            MdpPipeInfoHighRes& pipe_info = *(MdpPipeInfoHighRes*)info.pipeInfo;
            if(!acquireMDPPipes(ctx, layer, pipe_info,MDPCOMP_OV_VG)) {
                ALOGD_IF(isDebug(),"%s: Unable to get pipe for videos",
                                                            __FUNCTION__);
                //TODO: windback pipebook data on fail
                return false;
            }
            pipe_info.zOrder = nYuvIndex;
        }
    }

    for(int index = 0 ; index < layer_count ; index++ ) {
        hwc_layer_1_t* layer = &list->hwLayers[index];
        private_handle_t *hnd = (private_handle_t *)layer->handle;

        if(isYuvBuffer(hnd))
            continue;

        PipeLayerPair& info = currentFrame.pipeLayer[index];
        info.pipeInfo = new MdpPipeInfoHighRes;
        info.rot = NULL;
        MdpPipeInfoHighRes& pipe_info = *(MdpPipeInfoHighRes*)info.pipeInfo;

        ePipeType type = MDPCOMP_OV_ANY;

        if(!qhwc::needsScaling(layer) && !ctx->mNeedsRotator
                             && ctx->mMDP.version >= qdutils::MDSS_V5)
            type = MDPCOMP_OV_DMA;

        if(!acquireMDPPipes(ctx, layer, pipe_info, type)) {
            ALOGD_IF(isDebug(), "%s: Unable to get pipe for UI", __FUNCTION__);
            //TODO: windback pipebook data on fail
            return false;
        }
        pipe_info.zOrder = index;
    }
    return true;
}
/*
 * Configures pipe(s) for MDP composition
 */
int MDPCompHighRes::configure(hwc_context_t *ctx, hwc_layer_1_t *layer,
        PipeLayerPair& pipeLayerPair) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    MdpPipeInfoHighRes& mdp_info =
            *(static_cast<MdpPipeInfoHighRes*>(pipeLayerPair.pipeInfo));
    eZorder zOrder = static_cast<eZorder>(mdp_info.zOrder);
    eIsFg isFg = IS_FG_OFF;
    eMdpFlags mdpFlagsL = OV_MDP_BACKEND_COMPOSITION;
    eDest lDest = mdp_info.lIndex;
    eDest rDest = mdp_info.rIndex;
    return configureHighRes(ctx, layer, dpy, mdpFlagsL, zOrder, isFg, lDest,
            rDest, &pipeLayerPair.rot);
}

bool MDPCompHighRes::draw(hwc_context_t *ctx, hwc_display_contents_1_t* list) {

    if(!isEnabled() || !isUsed()) {
        ALOGD_IF(isDebug(),"%s: MDP Comp not configured", __FUNCTION__);
        return true;
    }

    if(!ctx || !list) {
        ALOGE("%s: invalid contxt or list",__FUNCTION__);
        return false;
    }

    /* reset Invalidator */
    if(idleInvalidator)
        idleInvalidator->markForSleep();

    const int dpy = HWC_DISPLAY_PRIMARY;
    overlay::Overlay& ov = *ctx->mOverlay;
    LayerProp *layerProp = ctx->layerProp[dpy];

    int numHwLayers = ctx->listStats[dpy].numAppLayers;
    for(int i = 0; i < numHwLayers; i++ )
    {
        hwc_layer_1_t *layer = &list->hwLayers[i];
        private_handle_t *hnd = (private_handle_t *)layer->handle;
        if(!hnd) {
            ALOGE("%s handle null", __FUNCTION__);
            return false;
        }

        if(!(layerProp[i].mFlags & HWC_MDPCOMP)) {
            continue;
        }

        MdpPipeInfoHighRes& pipe_info =
                *(MdpPipeInfoHighRes*)mCurrentFrame.pipeLayer[i].pipeInfo;
        Rotator *rot = mCurrentFrame.pipeLayer[i].rot;

        ovutils::eDest indexL = pipe_info.lIndex;
        ovutils::eDest indexR = pipe_info.rIndex;
        int fd = hnd->fd;
        int offset = hnd->offset;

        if(rot) {
            rot->queueBuffer(fd, offset);
            fd = rot->getDstMemId();
            offset = rot->getDstOffset();
        }

        //************* play left mixer **********
        if(indexL != ovutils::OV_INVALID) {
            ovutils::eDest destL = (ovutils::eDest)indexL;
            ALOGD_IF(isDebug(),"%s: MDP Comp: Drawing layer: %p hnd: %p \
                    using  pipe: %d", __FUNCTION__, layer, hnd, indexL );
            if (!ov.queueBuffer(fd, offset, destL)) {
                ALOGE("%s: queueBuffer failed for left mixer", __FUNCTION__);
                return false;
            }
        }

        //************* play right mixer **********
        if(indexR != ovutils::OV_INVALID) {
            ovutils::eDest destR = (ovutils::eDest)indexR;
            ALOGD_IF(isDebug(),"%s: MDP Comp: Drawing layer: %p hnd: %p \
                    using  pipe: %d", __FUNCTION__, layer, hnd, indexR );
            if (!ov.queueBuffer(fd, offset, destR)) {
                ALOGE("%s: queueBuffer failed for right mixer", __FUNCTION__);
                return false;
            }
        }

        layerProp[i].mFlags &= ~HWC_MDPCOMP;
    }

    return true;
}
}; //namespace