/*
* 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"
#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 {
ALOGD("%s: /sys/class/graphics/fb%d/ad could not be opened : %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 &&
!isSecondaryConnected(ctx) &&
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,
ovutils::DEFAULT_PLANE_ALPHA,
ovutils::OVERLAY_BLENDING_OPAQUE);
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();
}
}