hwc/overlay: Dynamic pipe tracking.

Remove state based pipe handling and make pipes tracked dynamically.
Add the configStart, configDone, nextPipe availablePipes APIs.
Remove setState API.

-configStart marks all pipes available.
-configDone garbage-collects unused pipe objects.
-nextPipe returns the index of next available pipe and create a corresponding
pipe object if not present
-availablePipes returns total of "unallocated" pipes. (Pipes could be allocated
but unused)

Changes in hwc adapt to the new overlay APIs.
Compile out MDP comp.
Remove unused files in overlay and hwc.
Update licenses.

Conflicts:

	libhwcomposer/hwc.cpp
	libhwcomposer/hwc_utils.cpp

Bug: 7626586
Change-Id: Id8e56901d34e5dc0fd088260d05e3e46f68ff090
Signed-off-by: Saurabh Shah <saurshah@codeaurora.org>
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/liboverlay/overlayMdpRot.cpp b/liboverlay/overlayMdpRot.cpp
new file mode 100644
index 0000000..f96ddb7
--- /dev/null
+++ b/liboverlay/overlayMdpRot.cpp
@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * Copyright (c) 2010-2012, 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 "overlayUtils.h"
+#include "overlayRotator.h"
+
+namespace ovutils = overlay::utils;
+
+namespace overlay {
+
+MdpRot::MdpRot() {
+    reset();
+    init();
+}
+
+MdpRot::~MdpRot() { close(); }
+
+void MdpRot::setEnable() { mRotImgInfo.enable = 1; }
+
+void MdpRot::setDisable() { mRotImgInfo.enable = 0; }
+
+bool MdpRot::enabled() const { return mRotImgInfo.enable; }
+
+void MdpRot::setRotations(uint32_t r) { mRotImgInfo.rotations = r; }
+
+int MdpRot::getDstMemId() const {
+    return mRotDataInfo.dst.memory_id;
+}
+
+uint32_t MdpRot::getDstOffset() const {
+    return mRotDataInfo.dst.offset;
+}
+
+uint32_t MdpRot::getSessId() const { return mRotImgInfo.session_id; }
+
+void MdpRot::setSrcFB() {
+    mRotDataInfo.src.flags |= MDP_MEMORY_ID_TYPE_FB;
+}
+
+void MdpRot::save() {
+    mLSRotImgInfo = mRotImgInfo;
+}
+
+bool MdpRot::rotConfChanged() const {
+    // 0 means same
+    if(0 == ::memcmp(&mRotImgInfo, &mLSRotImgInfo,
+                sizeof (msm_rotator_img_info))) {
+        return false;
+    }
+    return true;
+}
+
+bool MdpRot::init()
+{
+    if(!mFd.open(Res::rotPath, O_RDWR)){
+        ALOGE("MdpRot failed to init %s", Res::rotPath);
+        return false;
+    }
+    return true;
+}
+
+void MdpRot::setSource(const overlay::utils::Whf& awhf) {
+    utils::Whf whf(awhf);
+
+    mRotImgInfo.src.format = whf.format;
+    if(whf.format == MDP_Y_CRCB_H2V2_TILE ||
+        whf.format == MDP_Y_CBCR_H2V2_TILE) {
+        whf.w =  utils::alignup(awhf.w, 64);
+        whf.h = utils::alignup(awhf.h, 32);
+    }
+
+    mRotImgInfo.src.width = whf.w;
+    mRotImgInfo.src.height = whf.h;
+
+    mRotImgInfo.src_rect.w = whf.w;
+    mRotImgInfo.src_rect.h = whf.h;
+
+    mRotImgInfo.dst.width = whf.w;
+    mRotImgInfo.dst.height = whf.h;
+
+    mBufSize = awhf.size;
+}
+
+void MdpRot::setFlags(const utils::eMdpFlags& flags) {
+    mRotImgInfo.secure = 0;
+    if(flags & utils::OV_MDP_SECURE_OVERLAY_SESSION)
+        mRotImgInfo.secure = 1;
+}
+
+void MdpRot::setTransform(const utils::eTransform& rot, const bool& rotUsed)
+{
+    int r = utils::getMdpOrient(rot);
+    setRotations(r);
+    //getMdpOrient will switch the flips if the source is 90 rotated.
+    //Clients in Android dont factor in 90 rotation while deciding the flip.
+    mOrientation = static_cast<utils::eTransform>(r);
+    ALOGE_IF(DEBUG_OVERLAY, "%s: r=%d", __FUNCTION__, r);
+
+    setDisable();
+    if(rotUsed) {
+        setEnable();
+    }
+}
+
+void MdpRot::doTransform() {
+    if(mOrientation & utils::OVERLAY_TRANSFORM_ROT_90)
+        utils::swap(mRotImgInfo.dst.width, mRotImgInfo.dst.height);
+}
+
+bool MdpRot::commit() {
+    doTransform();
+    if(rotConfChanged()) {
+        if(!overlay::mdp_wrapper::startRotator(mFd.getFD(), mRotImgInfo)) {
+            ALOGE("MdpRot commit failed");
+            dump();
+            return false;
+        }
+        save();
+        mRotDataInfo.session_id = mRotImgInfo.session_id;
+    }
+    return true;
+}
+
+bool MdpRot::open_i(uint32_t numbufs, uint32_t bufsz)
+{
+    OvMem mem;
+
+    OVASSERT(MAP_FAILED == mem.addr(), "MAP failed in open_i");
+
+    if(!mem.open(numbufs, bufsz, mRotImgInfo.secure)){
+        ALOGE("%s: Failed to open", __func__);
+        mem.close();
+        return false;
+    }
+
+    OVASSERT(MAP_FAILED != mem.addr(), "MAP failed");
+    OVASSERT(mem.getFD() != -1, "getFd is -1");
+
+    mRotDataInfo.dst.memory_id = mem.getFD();
+    mRotDataInfo.dst.offset = 0;
+    mMem.curr().m = mem;
+    return true;
+}
+
+bool MdpRot::close() {
+    bool success = true;
+    if(mFd.valid() && (getSessId() != 0)) {
+        if(!mdp_wrapper::endRotator(mFd.getFD(), getSessId())) {
+            ALOGE("Mdp Rot error endRotator, fd=%d sessId=%u",
+                    mFd.getFD(), getSessId());
+            success = false;
+        }
+    }
+    if (!mFd.close()) {
+        ALOGE("Mdp Rot error closing fd");
+        success = false;
+    }
+    if (!mMem.close()) {
+        ALOGE("Mdp Rot error closing mem");
+        success = false;
+    }
+    reset();
+    return success;
+}
+
+bool MdpRot::remap(uint32_t numbufs) {
+    // if current size changed, remap
+    if(mBufSize == mMem.curr().size()) {
+        ALOGE_IF(DEBUG_OVERLAY, "%s: same size %d", __FUNCTION__, mBufSize);
+        return true;
+    }
+
+    ALOGE_IF(DEBUG_OVERLAY, "%s: size changed - remapping", __FUNCTION__);
+    OVASSERT(!mMem.prev().valid(), "Prev should not be valid");
+
+    // ++mMem will make curr to be prev, and prev will be curr
+    ++mMem;
+    if(!open_i(numbufs, mBufSize)) {
+        ALOGE("%s Error could not open", __FUNCTION__);
+        return false;
+    }
+    for (uint32_t i = 0; i < numbufs; ++i) {
+        mMem.curr().mRotOffset[i] = i * mBufSize;
+    }
+    return true;
+}
+
+void MdpRot::reset() {
+    ovutils::memset0(mRotImgInfo);
+    ovutils::memset0(mLSRotImgInfo);
+    ovutils::memset0(mRotDataInfo);
+    ovutils::memset0(mMem.curr().mRotOffset);
+    ovutils::memset0(mMem.prev().mRotOffset);
+    mMem.curr().mCurrOffset = 0;
+    mMem.prev().mCurrOffset = 0;
+    mBufSize = 0;
+    mOrientation = utils::OVERLAY_TRANSFORM_0;
+}
+
+bool MdpRot::queueBuffer(int fd, uint32_t offset) {
+    if(enabled()) {
+        mRotDataInfo.src.memory_id = fd;
+        mRotDataInfo.src.offset = offset;
+
+        remap(RotMem::Mem::ROT_NUM_BUFS);
+        OVASSERT(mMem.curr().m.numBufs(),
+                "queueBuffer numbufs is 0");
+        mRotDataInfo.dst.offset =
+                mMem.curr().mRotOffset[mMem.curr().mCurrOffset];
+        mMem.curr().mCurrOffset =
+                (mMem.curr().mCurrOffset + 1) % mMem.curr().m.numBufs();
+
+        if(!overlay::mdp_wrapper::rotate(mFd.getFD(), mRotDataInfo)) {
+            ALOGE("MdpRot failed rotate");
+            dump();
+            return false;
+        }
+
+        // if the prev mem is valid, we need to close
+        if(mMem.prev().valid()) {
+            // FIXME if no wait for vsync the above
+            // play will return immediatly and might cause
+            // tearing when prev.close is called.
+            if(!mMem.prev().close()) {
+                ALOGE("%s error in closing prev rot mem", __FUNCTION__);
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+void MdpRot::dump() const {
+    ALOGE("== Dump MdpRot start ==");
+    mFd.dump();
+    mMem.curr().m.dump();
+    mdp_wrapper::dump("mRotImgInfo", mRotImgInfo);
+    mdp_wrapper::dump("mRotDataInfo", mRotDataInfo);
+    ALOGE("== Dump MdpRot end ==");
+}
+
+} // namespace overlay