libhwcomposer/hwc_mdpcomp.cpp

/*
 * Copyright (C) 2012, 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"

namespace qhwc {

namespace ovutils = overlay::utils;

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

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

MDPComp* MDPComp::getObject(const int& width) {
    //For now. Later check for width > 2048
    return new MDPCompLowRes();
}

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::printInfo(hwc_layer_1_t* layer) {
    hwc_rect_t sourceCrop = layer->sourceCrop;
    hwc_rect_t displayFrame = layer->displayFrame;

    int s_l = sourceCrop.left;
    int s_t = sourceCrop.top;
    int s_r = sourceCrop.right;
    int s_b = sourceCrop.bottom;

    int d_l = displayFrame.left;
    int d_t = displayFrame.top;
    int d_r = displayFrame.right;
    int d_b = displayFrame.bottom;

    ALOGD_IF(isDebug(), "src:[%d,%d,%d,%d] (%d x %d) \
            dst:[%d,%d,%d,%d] (%d x %d)",
            s_l, s_t, s_r, s_b, (s_r - s_l), (s_b - s_t),
            d_l, d_t, d_r, d_b, (d_r - d_l), (d_b - d_t));
}

//=============MDPCompLowRes===================================================
void MDPCompLowRes::reset(hwc_context_t *ctx,
        hwc_display_contents_1_t* list ) {
    //Reset flags and states
    unsetMDPCompLayerFlags(ctx, list);
    mCurrentFrame.count = 0;
    if(mCurrentFrame.pipeLayer) {
        free(mCurrentFrame.pipeLayer);
        mCurrentFrame.pipeLayer = NULL;
    }
}

void MDPCompLowRes::setVidInfo(hwc_layer_1_t *layer,
        ovutils::eMdpFlags &mdpFlags) {
    private_handle_t *hnd = (private_handle_t *)layer->handle;
    MetaData_t *metadata = (MetaData_t *)hnd->base_metadata;

    if(isSecureBuffer(hnd)) {
        ovutils::setMdpFlags(mdpFlags, ovutils::OV_MDP_SECURE_OVERLAY_SESSION);
    }
    if(metadata && (metadata->operation & PP_PARAM_INTERLACED) &&
                                              metadata->interlaced) {
        ovutils::setMdpFlags(mdpFlags, ovutils::OV_MDP_DEINTERLACE);
    }
}

bool MDPCompLowRes::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) {
       qhwc::calculate_crop_rects(crop, dst, hw_w, hw_h, 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;
}

/*
 * Configures pipe(s) for MDP composition
 */
int MDPCompLowRes::configure(hwc_context_t *ctx, hwc_layer_1_t *layer,
        MdpPipeInfo& mdp_info) {
    int nPipeIndex = mdp_info.index;
    const int dpy = HWC_DISPLAY_PRIMARY;
    private_handle_t *hnd = (private_handle_t *)layer->handle;
    overlay::Overlay& ov = *ctx->mOverlay;

    if(!hnd) {
        ALOGE("%s: layer handle is NULL", __FUNCTION__);
        return -1;
    }

    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;

    const int src_w = sourceCrop.right - sourceCrop.left;
    const int src_h = sourceCrop.bottom - sourceCrop.top;

    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) {
        ALOGD_IF(isDebug(),"%s: Destination has negative coordinates",
                __FUNCTION__);
        qhwc::calculate_crop_rects(crop, dst, hw_w, hw_h, layer->transform);

        //Update calulated width and height
        crop_w = crop.right - crop.left;
        crop_h = crop.bottom - crop.top;

        dst_w = dst.right - dst.left;
        dst_h = dst.bottom - dst.top;
    }

    if( (dst_w > hw_w)|| (dst_h > hw_h)) {
        ALOGD_IF(isDebug(),"%s: Dest rect exceeds FB", __FUNCTION__);
        printInfo(layer);
        dst_w = hw_w;
        dst_h = hw_h;
    }

    // Determine pipe to set based on pipe index
    ovutils::eDest dest = (ovutils::eDest)mdp_info.index;

    ovutils::eZorder zOrder = ovutils::ZORDER_0;

    if(mdp_info.zOrder == 0 ) {
        zOrder = ovutils::ZORDER_0;
    } else if(mdp_info.zOrder == 1 ) {
        zOrder = ovutils::ZORDER_1;
    } else if(mdp_info.zOrder == 2 ) {
        zOrder = ovutils::ZORDER_2;
    } else if(mdp_info.zOrder == 3) {
        zOrder = ovutils::ZORDER_3;
    }

    // Order order order
    // setSource - just setting source
    // setParameter - changes src w/h/f accordingly
    // setCrop - ROI - src_rect
    // setPosition - dst_rect
    // commit - commit changes to mdp driver
    // queueBuffer - not here, happens when draw is called

    ovutils::Whf info(hnd->width, hnd->height, hnd->format, hnd->size);

    ovutils::eMdpFlags mdpFlags = ovutils::OV_MDP_FLAGS_NONE;

    if(isYuvBuffer(hnd))
        setVidInfo(layer, mdpFlags);

    ovutils::setMdpFlags(mdpFlags,ovutils::OV_MDP_BACKEND_COMPOSITION);

    if(layer->blending == HWC_BLENDING_PREMULT) {
        ovutils::setMdpFlags(mdpFlags,
                ovutils::OV_MDP_BLEND_FG_PREMULT);
    }

    ovutils::eTransform orient = overlay::utils::OVERLAY_TRANSFORM_0 ;

    if(!(layer->transform & HWC_TRANSFORM_ROT_90)) {
        if(layer->transform & HWC_TRANSFORM_FLIP_H) {
            ovutils::setMdpFlags(mdpFlags, ovutils::OV_MDP_FLIP_H);
        }

        if(layer->transform & HWC_TRANSFORM_FLIP_V) {
            ovutils::setMdpFlags(mdpFlags,  ovutils::OV_MDP_FLIP_V);
        }
    } else {
        orient = static_cast<ovutils::eTransform>(layer->transform);
    }

    ovutils::eRotFlags rotFlags = ovutils::ROT_FLAGS_NONE;
    if(isYuvBuffer(hnd) && (ctx->mMDP.version >= qdutils::MDP_V4_2 &&
                           ctx->mMDP.version < qdutils::MDSS_V5)) {
        rotFlags = ovutils::ROT_DOWNSCALE_ENABLED;
    }

    ovutils::PipeArgs parg(mdpFlags,
            info,
            zOrder,
            ovutils::IS_FG_OFF,
            rotFlags);

    ov.setSource(parg, dest);

    ov.setTransform(orient, dest);

    ovutils::Dim dcrop(crop.left, crop.top, crop_w, crop_h);
    ov.setCrop(dcrop, dest);

    ovutils::Dim dim(dst.left, dst.top, dst_w, dst_h);
    ov.setPosition(dim, dest);

    ALOGD_IF(isDebug(),"%s: MDP set: crop[%d,%d,%d,%d] dst[%d,%d,%d,%d] \
            nPipe: %d zorder: %d",__FUNCTION__, dcrop.x,
            dcrop.y,dcrop.w, dcrop.h, dim.x, dim.y, dim.w, dim.h,
            mdp_info.index, mdp_info.zOrder);

    if (!ov.commit(dest)) {
        ALOGE("%s: commit failed", __FUNCTION__);
        return -1;
    }
    return 0;
}

/*
 * MDPComp not possible when
 * 1. We have more than sMaxLayers
 * 2. External display connected
 * 3. Composition is triggered by
 *    Idle timer expiry
 * 4. Rotation is  needed
 * 5. Overlay in use
 */

bool MDPCompLowRes::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;

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

    if(numAppLayers < 1 || numAppLayers > (uint32_t)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) {
        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;
    }


    //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))
            return false;
    }
    return true;
}

int MDPCompLowRes::getMdpPipe(hwc_context_t *ctx, ePipeType type) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    overlay::Overlay& ov = *ctx->mOverlay;
    int mdp_pipe = -1;

    switch(type) {
        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
                return -1;
            }
        case  MDPCOMP_OV_VG:
            mdp_pipe = ov.nextPipe(ovutils::OV_MDP_PIPE_VG, dpy);
            if(mdp_pipe != ovutils::OV_INVALID) {
                return mdp_pipe;
            }
            return -1;
        default:
            ALOGE("%s: Invalid pipe type",__FUNCTION__);
            return -1;
    };
}

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];
            MdpPipeInfo& pipe_info = info.pipeIndex;
            pipe_info.index = getMdpPipe(ctx, MDPCOMP_OV_VG);
            if(pipe_info.index < 0) {
                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];
        MdpPipeInfo& pipe_info = info.pipeIndex;
        pipe_info.index = getMdpPipe(ctx, MDPCOMP_OV_ANY);
        if(pipe_info.index < 0) {
            ALOGD_IF(isDebug(), "%s: Unable to get pipe for UI", __FUNCTION__);
            return false;
        }
        pipe_info.zOrder = index;
    }
    return true;
}

bool MDPCompLowRes::setup(hwc_context_t* ctx, hwc_display_contents_1_t* list) {
    const int dpy = HWC_DISPLAY_PRIMARY;
    int nPipeIndex, vsync_wait, isFG;
    int numHwLayers = ctx->listStats[dpy].numAppLayers;

    FrameInfo &currentFrame = mCurrentFrame;
    currentFrame.count = 0;

    if(currentFrame.pipeLayer) {
        free(currentFrame.pipeLayer);
        currentFrame.pipeLayer = NULL;
    }

    if(!ctx) {
        ALOGE("%s: invalid context", __FUNCTION__);
        return -1;
    }

    if(!allocLayerPipes(ctx, list, currentFrame)) {
        //clean current frame data
        currentFrame.count = 0;

        if(currentFrame.pipeLayer) {
            free(currentFrame.pipeLayer);
            currentFrame.pipeLayer = NULL;
        }

        ALOGD_IF(isDebug(), "%s: Falling back to FB", __FUNCTION__);
        return false;
    }

    for (int index = 0 ; index < currentFrame.count; index++) {
        hwc_layer_1_t* layer = &list->hwLayers[index];
        MdpPipeInfo& cur_pipe = currentFrame.pipeLayer[index].pipeIndex;

        if(configure(ctx, layer, cur_pipe) != 0 ) {
            ALOGD_IF(isDebug(), "%s: MDPComp failed to configure overlay for \
                    layer %d with pipe index:%d",__FUNCTION__,
                    index, cur_pipe.index);
            return false;
        }
    }
    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];

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

        MdpPipeInfo& pipe_info =
                mCurrentFrame.pipeLayer[i].pipeIndex;
        int index = pipe_info.index;

        if(index < 0) {
            ALOGE("%s: Invalid pipe index (%d)", __FUNCTION__, index);
            return false;
        }

        ovutils::eDest dest = (ovutils::eDest)index;

        if (ctx ) {
            private_handle_t *hnd = (private_handle_t *)layer->handle;
            if(!hnd) {
                ALOGE("%s handle null", __FUNCTION__);
                return false;
            }

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

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

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

bool MDPCompLowRes::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;
    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;
}

}; //namespace