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/*
* Copyright 2022 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 "DrmConnector.h"
#include <span>
#include "EdidInfo.h"
namespace aidl::android::hardware::graphics::composer3::impl {
namespace {
static constexpr const float kMillimetersPerInch = 25.4f;
} // namespace
std::unique_ptr<DrmConnector> DrmConnector::create(::android::base::borrowed_fd drmFd,
uint32_t connectorId) {
std::unique_ptr<DrmConnector> connector(new DrmConnector(connectorId));
if (!LoadDrmProperties(drmFd, connectorId, DRM_MODE_OBJECT_CONNECTOR, GetPropertiesMap(),
connector.get())) {
ALOGE("%s: Failed to load connector properties.", __FUNCTION__);
return nullptr;
}
if (!connector->update(drmFd)) {
return nullptr;
}
return connector;
}
bool DrmConnector::update(::android::base::borrowed_fd drmFd) {
DEBUG_LOG("%s: Loading properties for connector:%" PRIu32, __FUNCTION__, mId);
drmModeConnector* drmConnector = drmModeGetConnector(drmFd.get(), mId);
if (!drmConnector) {
ALOGE("%s: Failed to load connector.", __FUNCTION__);
return false;
}
mStatus = drmConnector->connection;
mModes.clear();
for (uint32_t i = 0; i < drmConnector->count_modes; i++) {
auto mode = DrmMode::create(drmFd, drmConnector->modes[i]);
if (!mode) {
ALOGE("%s: Failed to create mode for connector.", __FUNCTION__);
return false;
}
mModes.push_back(std::move(mode));
}
drmModeFreeConnector(drmConnector);
if (mStatus == DRM_MODE_CONNECTED) {
std::optional<EdidInfo> maybeEdidInfo = loadEdid(drmFd);
if (!maybeEdidInfo) {
ALOGE("%s: failed to parse EDID info for display:%" PRIu32 ".", __FUNCTION__, mId);
return false;
}
const EdidInfo& edidInfo = maybeEdidInfo.value();
mWidthMillimeters = edidInfo.mWidthMillimeters;
mHeightMillimeters = edidInfo.mHeightMillimeters;
}
DEBUG_LOG("%s: connector:%" PRIu32 " widthMillimeters:%" PRIu32 " heightMillimeters:%" PRIu32,
__FUNCTION__, mId, (mWidthMillimeters ? *mWidthMillimeters : 0),
(mHeightMillimeters ? *mHeightMillimeters : 0));
return true;
}
std::optional<EdidInfo> DrmConnector::loadEdid(::android::base::borrowed_fd drmFd) {
DEBUG_LOG("%s: display:%" PRIu32, __FUNCTION__, mId);
const uint64_t edidBlobId = mEdidProp.getValue();
if (edidBlobId == -1) {
ALOGW("%s: display:%" PRIu32 " does not have EDID.", __FUNCTION__, mId);
return std::nullopt;
}
auto blob = drmModeGetPropertyBlob(drmFd.get(), static_cast<uint32_t>(edidBlobId));
if (!blob) {
ALOGE("%s: display:%" PRIu32 " failed to read EDID blob (%" PRIu64 "): %s", __FUNCTION__,
mId, edidBlobId, strerror(errno));
return std::nullopt;
}
const uint8_t* blobStart = static_cast<uint8_t*>(blob->data);
mEdid = std::vector<uint8_t>(blobStart, blobStart + blob->length);
drmModeFreePropertyBlob(blob);
using byte_view = std::span<const uint8_t>;
byte_view edid(*mEdid);
return EdidInfo::parse(edid);
}
uint32_t DrmConnector::getWidth() const {
DEBUG_LOG("%s: connector:%" PRIu32, __FUNCTION__, mId);
if (mModes.empty()) {
return 0;
}
return mModes[0]->hdisplay;
}
uint32_t DrmConnector::getHeight() const {
DEBUG_LOG("%s: connector:%" PRIu32, __FUNCTION__, mId);
if (mModes.empty()) {
return 0;
}
return mModes[0]->vdisplay;
}
uint32_t DrmConnector::getDpiX() const {
DEBUG_LOG("%s: connector:%" PRIu32, __FUNCTION__, mId);
if (mModes.empty()) {
return 0;
}
const auto& mode = mModes[0];
if (mWidthMillimeters) {
const uint32_t dpi = static_cast<uint32_t>(
(static_cast<float>(mode->hdisplay) / static_cast<float>(*mWidthMillimeters)) *
kMillimetersPerInch);
DEBUG_LOG("%s: connector:%" PRIu32 " has dpi-x:%" PRIu32, __FUNCTION__, mId, dpi);
return dpi;
}
return 0;
}
uint32_t DrmConnector::getDpiY() const {
DEBUG_LOG("%s: connector:%" PRIu32, __FUNCTION__, mId);
if (mModes.empty()) {
return 0;
}
const auto& mode = mModes[0];
if (mHeightMillimeters) {
const uint32_t dpi = static_cast<uint32_t>(
(static_cast<float>(mode->vdisplay) / static_cast<float>(*mHeightMillimeters)) *
kMillimetersPerInch);
DEBUG_LOG("%s: connector:%" PRIu32 " has dpi-x:%" PRIu32, __FUNCTION__, mId, dpi);
return dpi;
}
return 0;
}
float DrmConnector::getRefreshRate() const {
DEBUG_LOG("%s: connector:%" PRIu32, __FUNCTION__, mId);
if (!mModes.empty()) {
const auto& mode = mModes[0];
return 1000.0f * mode->clock / ((float)mode->vtotal * (float)mode->htotal);
}
return -1.0f;
}
} // namespace aidl::android::hardware::graphics::composer3::impl
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