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/*
* Copyright 2021 The Android Open Source Project
*
* 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 "DisplayFinder.h"
#include <android-base/parseint.h>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <device_config_shared.h>
#include "Common.h"
#include "HostUtils.h"
namespace android {
namespace {
constexpr int32_t HertzToPeriodNanos(uint32_t hertz) {
return 1000 * 1000 * 1000 / hertz;
}
HWC2::Error findCuttlefishDisplays(std::vector<DisplayMultiConfigs>& displays) {
DEBUG_LOG("%s", __FUNCTION__);
// TODO: replace with initializing directly from DRM info.
const auto deviceConfig = cuttlefish::GetDeviceConfig();
hwc2_display_t displayId = 0;
hwc2_config_t configId = 0;
for (const auto& deviceDisplayConfig : deviceConfig.display_config()) {
DisplayMultiConfigs display = {
.displayId = displayId,
.activeConfigId = configId,
.configs =
{
DisplayConfig(configId, //
deviceDisplayConfig.width(), //
deviceDisplayConfig.height(), //
deviceDisplayConfig.dpi(), //
deviceDisplayConfig.dpi(), //
HertzToPeriodNanos(
deviceDisplayConfig.refresh_rate_hz()) //
), //
},
};
displays.push_back(display);
++configId;
++displayId;
}
return HWC2::Error::None;
}
static int getVsyncHzFromProperty() {
static constexpr const auto kVsyncProp = "ro.boot.qemu.vsync";
const auto vsyncProp = android::base::GetProperty(kVsyncProp, "");
DEBUG_LOG("%s: prop value is: %s", __FUNCTION__, vsyncProp.c_str());
uint64_t vsyncPeriod;
if (!android::base::ParseUint(vsyncProp, &vsyncPeriod)) {
ALOGE("%s: failed to parse vsync period '%s', returning default 60",
__FUNCTION__, vsyncProp.c_str());
return 60;
}
return static_cast<int>(vsyncPeriod);
}
HWC2::Error findGoldfishPrimaryDisplay(
std::vector<DisplayMultiConfigs>& displays) {
DEBUG_LOG("%s", __FUNCTION__);
DEFINE_AND_VALIDATE_HOST_CONNECTION
hostCon->lock();
const int32_t vsyncPeriodNanos = HertzToPeriodNanos(getVsyncHzFromProperty());
DisplayMultiConfigs display;
display.displayId = 0;
if (rcEnc->hasHWCMultiConfigs()) {
int count = rcEnc->rcGetFBDisplayConfigsCount(rcEnc);
if (count <= 0) {
ALOGE("%s failed to allocate primary display, config count %d", __func__,
count);
return HWC2::Error::NoResources;
}
display.activeConfigId = rcEnc->rcGetFBDisplayActiveConfig(rcEnc);
for (int configId = 0; configId < count; configId++) {
display.configs.push_back(DisplayConfig(
configId, //
rcEnc->rcGetFBDisplayConfigsParam(rcEnc, configId, FB_WIDTH), //
rcEnc->rcGetFBDisplayConfigsParam(rcEnc, configId, FB_HEIGHT), //
rcEnc->rcGetFBDisplayConfigsParam(rcEnc, configId, FB_XDPI), //
rcEnc->rcGetFBDisplayConfigsParam(rcEnc, configId, FB_YDPI), //
vsyncPeriodNanos //
));
}
} else {
display.activeConfigId = 0;
display.configs.push_back(DisplayConfig(
0, //
rcEnc->rcGetFBParam(rcEnc, FB_WIDTH), //
rcEnc->rcGetFBParam(rcEnc, FB_HEIGHT), //
rcEnc->rcGetFBParam(rcEnc, FB_XDPI), //
rcEnc->rcGetFBParam(rcEnc, FB_YDPI), //
vsyncPeriodNanos //
));
}
hostCon->unlock();
displays.push_back(display);
return HWC2::Error::None;
}
HWC2::Error findGoldfishSecondaryDisplays(
std::vector<DisplayMultiConfigs>& displays) {
DEBUG_LOG("%s", __FUNCTION__);
static constexpr const char kExternalDisplayProp[] =
"hwservicemanager.external.displays";
const auto propString = android::base::GetProperty(kExternalDisplayProp, "");
DEBUG_LOG("%s: prop value is: %s", __FUNCTION__, propString.c_str());
if (propString.empty()) {
return HWC2::Error::None;
}
const std::vector<std::string> propStringParts =
android::base::Split(propString, ",");
if (propStringParts.size() % 5 != 0) {
ALOGE("%s: Invalid syntax for system prop %s which is %s", __FUNCTION__,
kExternalDisplayProp, propString.c_str());
return HWC2::Error::BadParameter;
}
std::vector<int> propIntParts;
for (const std::string& propStringPart : propStringParts) {
int propIntPart;
if (!android::base::ParseInt(propStringPart, &propIntPart)) {
ALOGE("%s: Invalid syntax for system prop %s which is %s", __FUNCTION__,
kExternalDisplayProp, propString.c_str());
return HWC2::Error::BadParameter;
}
propIntParts.push_back(propIntPart);
}
hwc2_display_t secondaryDisplayId = 1;
hwc2_config_t secondaryConfigId = 1;
while (!propIntParts.empty()) {
DisplayMultiConfigs display;
display.displayId = secondaryDisplayId;
display.activeConfigId = 0;
display.configs.push_back(DisplayConfig(
secondaryConfigId, //
/*width=*/propIntParts[1], //
/*heighth=*/propIntParts[2], //
/*dpiXh=*/propIntParts[3], //
/*dpiYh=*/propIntParts[3], //
/*vsyncPeriod=*/HertzToPeriodNanos(160) //
));
displays.push_back(display);
++secondaryConfigId;
++secondaryDisplayId;
propIntParts.erase(propIntParts.begin(), propIntParts.begin() + 5);
}
return HWC2::Error::None;
}
HWC2::Error findGoldfishDisplays(std::vector<DisplayMultiConfigs>& displays) {
HWC2::Error error = findGoldfishPrimaryDisplay(displays);
if (error != HWC2::Error::None) {
ALOGE("%s failed to find Goldfish primary display", __FUNCTION__);
return error;
}
error = findGoldfishSecondaryDisplays(displays);
if (error != HWC2::Error::None) {
ALOGE("%s failed to find Goldfish secondary displays", __FUNCTION__);
}
return error;
}
} // namespace
HWC2::Error findDisplays(std::vector<DisplayMultiConfigs>& displays) {
HWC2::Error error = HWC2::Error::None;
if (IsCuttlefish()) {
error = findCuttlefishDisplays(displays);
} else {
error = findGoldfishDisplays(displays);
}
if (error != HWC2::Error::None) {
ALOGE("%s failed to find displays", __FUNCTION__);
return error;
}
for (auto& display : displays) {
DisplayConfig::addConfigGroups(&display.configs);
}
return HWC2::Error::None;
}
} // namespace android
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