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// Copyright (C) 2015 Pier Luigi Fiorini <pierluigi.fiorini@gmail.com>
// Copyright (C) 2016 The Qt Company Ltd.
// Copyright (C) 2016 Pelagicore AG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
#include "qeglfskmsgbmdevice_p.h"
#include "qeglfskmsgbmscreen_p.h"
#include <private/qeglfsintegration_p.h>
#include <private/qeglfskmsintegration_p.h>
#include <QtCore/QLoggingCategory>
#include <QtCore/qtimer.h>
#include <QtCore/private/qcore_unix_p.h>
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
QT_BEGIN_NAMESPACE
QEglFSKmsGbmDevice::QEglFSKmsGbmDevice(QKmsScreenConfig *screenConfig, const QString &path)
: QEglFSKmsDevice(screenConfig, path)
, m_gbm_device(nullptr)
, m_globalCursor(nullptr)
{
}
bool QEglFSKmsGbmDevice::open()
{
Q_ASSERT(fd() == -1);
Q_ASSERT(m_gbm_device == nullptr);
int fd = qt_safe_open(devicePath().toLocal8Bit().constData(), O_RDWR | O_CLOEXEC);
if (fd == -1) {
qErrnoWarning("Could not open DRM device %s", qPrintable(devicePath()));
return false;
}
qCDebug(qLcEglfsKmsDebug) << "Creating GBM device for file descriptor" << fd
<< "obtained from" << devicePath();
m_gbm_device = gbm_create_device(fd);
if (!m_gbm_device) {
qErrnoWarning("Could not create GBM device");
qt_safe_close(fd);
fd = -1;
return false;
}
setFd(fd);
if (usesEventReader()) {
qCDebug(qLcEglfsKmsDebug, "Using dedicated drm event reading thread");
m_eventReader.create(this);
} else {
qCDebug(qLcEglfsKmsDebug, "Not using dedicated drm event reading thread; "
"threaded multi-screen setups may experience problems");
}
return true;
}
void QEglFSKmsGbmDevice::close()
{
// Note: screens are gone at this stage.
if (usesEventReader())
m_eventReader.destroy();
if (m_gbm_device) {
gbm_device_destroy(m_gbm_device);
m_gbm_device = nullptr;
}
if (fd() != -1) {
qt_safe_close(fd());
setFd(-1);
}
}
void *QEglFSKmsGbmDevice::nativeDisplay() const
{
return m_gbm_device;
}
gbm_device * QEglFSKmsGbmDevice::gbmDevice() const
{
return m_gbm_device;
}
QPlatformCursor *QEglFSKmsGbmDevice::globalCursor() const
{
return m_globalCursor;
}
// Cannot do this from close(), it may be too late.
// Call this from the last screen dtor instead.
void QEglFSKmsGbmDevice::destroyGlobalCursor()
{
if (m_globalCursor) {
qCDebug(qLcEglfsKmsDebug, "Destroying global GBM mouse cursor");
delete m_globalCursor;
m_globalCursor = nullptr;
}
}
void QEglFSKmsGbmDevice::createGlobalCursor(QEglFSKmsGbmScreen *screen)
{
if (!m_globalCursor && screenConfig()->hwCursor()) {
qCDebug(qLcEglfsKmsDebug, "Creating new global GBM mouse cursor");
m_globalCursor = new QEglFSKmsGbmCursor(screen);
}
}
QPlatformScreen *QEglFSKmsGbmDevice::createScreen(const QKmsOutput &output)
{
QEglFSKmsGbmScreen *screen = new QEglFSKmsGbmScreen(this, output, false);
// On some platforms (e.g. rpi4), you'll get a kernel warning/error
// if the cursor is created 'at the same time' as the screen is created.
// (drmModeMoveCursor is the specific call that causes the issue)
// When this issue is triggered, the screen's connector is unusable until reboot
//
// Below is a work-around (without negative implications for other platforms).
//
// interval of 0 and QMetaObject::invokeMethod (w/o Qt::QueuedConnection)
// do no help / will still trigger issue
QTimer::singleShot(1, [screen, this](){
createGlobalCursor(screen);
});
return screen;
}
QPlatformScreen *QEglFSKmsGbmDevice::createHeadlessScreen()
{
destroyGlobalCursor();
return new QEglFSKmsGbmScreen(this, QKmsOutput(), true);
}
void QEglFSKmsGbmDevice::registerScreenCloning(QPlatformScreen *screen,
QPlatformScreen *screenThisScreenClones,
const QList<QPlatformScreen *> &screensCloningThisScreen)
{
QEglFSKmsGbmScreen *gbmScreen = static_cast<QEglFSKmsGbmScreen *>(screen);
gbmScreen->initCloning(screenThisScreenClones, screensCloningThisScreen);
}
void QEglFSKmsGbmDevice::registerScreen(QPlatformScreen *screen,
bool isPrimary,
const QPoint &virtualPos,
const QList<QPlatformScreen *> &virtualSiblings)
{
QEglFSKmsDevice::registerScreen(screen, isPrimary, virtualPos, virtualSiblings);
if (screenConfig()->hwCursor() && m_globalCursor)
m_globalCursor->reevaluateVisibilityForScreens();
}
void QEglFSKmsGbmDevice::unregisterScreen(QPlatformScreen *screen)
{
// The global cursor holds a pointer to a QEglFSKmsGbmScreen.
// If that screen is being unregistered,
// this will recreate the global cursor with the first sibling screen.
if (m_globalCursor && screen == m_globalCursor->screen()) {
qCDebug(qLcEglfsKmsDebug) << "Destroying global GBM mouse cursor due to unregistering"
<< "it's screen - will probably be recreated right away";
delete m_globalCursor;
m_globalCursor = nullptr;
QList<QPlatformScreen *> siblings = screen->virtualSiblings();
siblings.removeOne(screen);
if (siblings.count() > 0) {
QEglFSKmsGbmScreen *kmsScreen = static_cast<QEglFSKmsGbmScreen *>(siblings.first());
m_globalCursor = new QEglFSKmsGbmCursor(kmsScreen);
qCDebug(qLcEglfsKmsDebug) << "Creating new global GBM mouse cursor on sibling screen";
} else {
qCWarning(qLcEglfsKmsDebug) << "Couldn't find a sibling to recreate"
<< "the GBM mouse cursor - it might vanish";
}
}
QEglFSKmsDevice::unregisterScreen(screen);
}
bool QEglFSKmsGbmDevice::usesEventReader() const
{
static const bool eventReaderThreadDisabled = qEnvironmentVariableIntValue("QT_QPA_EGLFS_KMS_NO_EVENT_READER_THREAD");
return !eventReaderThreadDisabled;
}
QT_END_NAMESPACE