hwc: Add assertive display support.
Add assertive display support to hwc. This feature takes effect when
node /sys/class/graphics/fb*/ad is present. This signifies that that LM0
is being used with fb* for writeback.
When a video playback begins we write "1" to this node to indicate to
post processing that a writeback will happen. Likewise a "0" is written
to this node when playback stops.
The original contents are worked upon and the modified output is fed
via writeback to either rotator or mdp as appropriate.
The feature doesnt trigger when either:
1) Buffer size exceeds 2048
2) External display is connected
3) Multiple yuv streams are present
When this mode is active, MDP comp is applied only to yuv layer.
Change-Id: If5520f9dc849de3189c9f9ed4e9072c8f8f760e1
diff --git a/libhwcomposer/hwc_ad.cpp b/libhwcomposer/hwc_ad.cpp
new file mode 100644
index 0000000..ef5980c
--- /dev/null
+++ b/libhwcomposer/hwc_ad.cpp
@@ -0,0 +1,261 @@
+/*
+* Copyright (c) 2013 The Linux Foundation. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+* * Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* * Redistributions in binary form must reproduce the above
+* copyright notice, this list of conditions and the following
+* disclaimer in the documentation and/or other materials provided
+* with the distribution.
+* * Neither the name of The Linux Foundation. nor the names of its
+* contributors may be used to endorse or promote products derived
+* from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <unistd.h>
+#include <overlay.h>
+#include <overlayUtils.h>
+#include <overlayWriteback.h>
+#include <mdp_version.h>
+#include "hwc_ad.h"
+#include "hwc_utils.h"
+#include "external.h"
+
+#define DEBUG 0
+using namespace overlay;
+using namespace overlay::utils;
+namespace qhwc {
+
+//Opens writeback framebuffer and returns fd.
+static int openWbFb() {
+ int wbFd = -1;
+ //Check opening which FB would connect LM to WB
+ const int wbFbNum = Overlay::getFbForDpy(Overlay::DPY_WRITEBACK);
+ if(wbFbNum >= 0) {
+ char wbFbPath[256];
+ snprintf (wbFbPath, sizeof(wbFbPath),
+ "/sys/class/graphics/fb%d", wbFbNum);
+ //Opening writeback fb first time would create ad node if the device
+ //supports adaptive display
+ wbFd = open(wbFbPath, O_RDONLY);
+ if(wbFd < 0) {
+ ALOGE("%s: Failed to open /sys/class/graphics/fb%d with error %s",
+ __func__, wbFbNum, strerror(errno));
+ }
+ } else {
+ ALOGD_IF(DEBUG, "%s: No writeback available", __func__);
+ }
+ return wbFd;
+}
+
+static inline void closeWbFb(int& fd) {
+ if(fd >= 0) {
+ close(fd);
+ fd = -1;
+ } else {
+ ALOGE("%s: Invalid fd %d", __func__, fd);
+ }
+}
+
+//Helper to write data to ad node
+static void adWrite(const int& value) {
+ const int wbFbNum = Overlay::getFbForDpy(Overlay::DPY_WRITEBACK);
+ char wbFbPath[256];
+ snprintf (wbFbPath, sizeof(wbFbPath),
+ "/sys/class/graphics/fb%d/ad", wbFbNum);
+ int adFd = open(wbFbPath, O_WRONLY);
+ if(adFd >= 0) {
+ char opStr[4] = "";
+ snprintf(opStr, sizeof(opStr), "%d", value);
+ int ret = write(adFd, opStr, strlen(opStr));
+ if(ret < 0) {
+ ALOGE("%s: Failed to write %d with error %s",
+ __func__, value, strerror(errno));
+ } else if (ret == 0){
+ ALOGE("%s Nothing written to ad", __func__);
+ } else {
+ ALOGD_IF(DEBUG, "%s: Wrote %d to ad", __func__, value);
+ }
+ close(adFd);
+ } else {
+ ALOGE("%s: Failed to open /sys/class/graphics/fb%d/ad with error %s",
+ __func__, wbFbNum, strerror(errno));
+ }
+}
+
+//Helper to read data from ad node
+static int adRead() {
+ const int wbFbNum = Overlay::getFbForDpy(Overlay::DPY_WRITEBACK);
+ int ret = -1;
+ char wbFbPath[256];
+ snprintf (wbFbPath, sizeof(wbFbPath),
+ "/sys/class/graphics/fb%d/ad", wbFbNum);
+ int adFd = open(wbFbPath, O_RDONLY);
+ if(adFd >= 0) {
+ char opStr[4] = {'\0'};
+ if(read(adFd, opStr, strlen(opStr)) >= 0) {
+ //Should return -1, 0 or 1
+ ret = atoi(opStr);
+ ALOGD_IF(DEBUG, "%s: Read %d from ad", __func__, ret);
+ } else {
+ ALOGE("%s: Read from ad node failed with error %s", __func__,
+ strerror(errno));
+ }
+ close(adFd);
+ } else {
+ ALOGE("%s: Failed to open /sys/class/graphics/fb%d/ad with error %s",
+ __func__, wbFbNum, strerror(errno));
+ }
+ return ret;
+}
+
+AssertiveDisplay::AssertiveDisplay() :mWbFd(-1), mDoable(false),
+ mFeatureEnabled(false), mDest(overlay::utils::OV_INVALID) {
+ int fd = openWbFb();
+ if(fd >= 0) {
+ //-1 means feature is disabled on device
+ // 0 means feature exists but turned off, will be turned on by hwc
+ // 1 means feature is turned on by hwc
+ if(adRead() >= 0) {
+ ALOGD_IF(DEBUG, "Assertive display feature supported");
+ mFeatureEnabled = true;
+ }
+ closeWbFb(fd);
+ }
+}
+
+void AssertiveDisplay::markDoable(hwc_context_t *ctx,
+ const hwc_display_contents_1_t* list) {
+ mDoable = false;
+ if(mFeatureEnabled &&
+ !ctx->mExtDisplay->isExternalConnected() &&
+ ctx->listStats[HWC_DISPLAY_PRIMARY].yuvCount == 1) {
+ int nYuvIndex = ctx->listStats[HWC_DISPLAY_PRIMARY].yuvIndices[0];
+ const hwc_layer_1_t* layer = &list->hwLayers[nYuvIndex];
+ private_handle_t *hnd = (private_handle_t *)layer->handle;
+ if(hnd && hnd->width <= qdutils::MAX_DISPLAY_DIM) {
+ mDoable = true;
+ }
+ }
+}
+
+bool AssertiveDisplay::prepare(hwc_context_t *ctx,
+ const hwc_rect_t& crop,
+ const Whf& whf,
+ const private_handle_t *hnd) {
+ if(!isDoable()) {
+ if(isModeOn()) {
+ //Cleanup one time during this switch
+ const int off = 0;
+ adWrite(off);
+ closeWbFb(mWbFd);
+ }
+ return false;
+ }
+
+ ovutils::eDest dest = ctx->mOverlay->nextPipe(ovutils::OV_MDP_PIPE_VG,
+ overlay::Overlay::DPY_WRITEBACK, Overlay::MIXER_DEFAULT);
+ if(dest == OV_INVALID) {
+ ALOGE("%s failed: No VG pipe available", __func__);
+ mDoable = false;
+ return false;
+ }
+
+ overlay::Writeback *wb = overlay::Writeback::getInstance();
+
+ if(!wb->configureDpyInfo(hnd->width, hnd->height)) {
+ ALOGE("%s: config display failed", __func__);
+ mDoable = false;
+ return false;
+ }
+
+ int tmpW, tmpH, size;
+ int format = ovutils::getHALFormat(wb->getOutputFormat());
+ if(format < 0) {
+ ALOGE("%s invalid format %d", __func__, format);
+ mDoable = false;
+ return false;
+ }
+
+ size = getBufferSizeAndDimensions(hnd->width, hnd->height,
+ format, tmpW, tmpH);
+
+ if(!wb->configureMemory(size, isSecureBuffer(hnd))) {
+ ALOGE("%s: config memory failed", __func__);
+ mDoable = false;
+ return false;
+ }
+
+ eMdpFlags mdpFlags = OV_MDP_FLAGS_NONE;
+ if(isSecureBuffer(hnd)) {
+ ovutils::setMdpFlags(mdpFlags,
+ ovutils::OV_MDP_SECURE_OVERLAY_SESSION);
+ }
+
+ PipeArgs parg(mdpFlags, whf, ZORDER_0, IS_FG_OFF,
+ ROT_FLAGS_NONE);
+ hwc_rect_t dst = crop; //input same as output
+
+ if(configMdp(ctx->mOverlay, parg, OVERLAY_TRANSFORM_0, crop, dst, NULL,
+ dest) < 0) {
+ ALOGE("%s: configMdp failed", __func__);
+ mDoable = false;
+ return false;
+ }
+
+ mDest = dest;
+ if(!isModeOn()) {
+ mWbFd = openWbFb();
+ if(mWbFd >= 0) {
+ //write to sysfs, one time during this switch
+ const int on = 1;
+ adWrite(on);
+ }
+ }
+ return true;
+}
+
+bool AssertiveDisplay::draw(hwc_context_t *ctx, int fd, uint32_t offset) {
+ if(!isDoable() || !isModeOn()) {
+ return false;
+ }
+
+ if (!ctx->mOverlay->queueBuffer(fd, offset, mDest)) {
+ ALOGE("%s: queueBuffer failed", __func__);
+ return false;
+ }
+
+ overlay::Writeback *wb = overlay::Writeback::getInstance();
+ if(!wb->writeSync()) {
+ return false;
+ }
+
+ return true;
+}
+
+int AssertiveDisplay::getDstFd(hwc_context_t *ctx) const {
+ overlay::Writeback *wb = overlay::Writeback::getInstance();
+ return wb->getDstFd();
+}
+
+uint32_t AssertiveDisplay::getDstOffset(hwc_context_t *ctx) const {
+ overlay::Writeback *wb = overlay::Writeback::getInstance();
+ return wb->getOffset();
+}
+
+}