599 lines
17 KiB
C++
599 lines
17 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "drm_backend.h"
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#include "drm_output.h"
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#include "composite.h"
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#include "cursor.h"
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#include "logging.h"
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#include "logind.h"
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#include "main.h"
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#include "scene_qpainter_drm_backend.h"
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#include "screens_drm.h"
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#include "udev.h"
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#include "wayland_server.h"
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#if HAVE_GBM
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#include "egl_gbm_backend.h"
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#endif
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// KWayland
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#include <KWayland/Server/outputconfiguration_interface.h>
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// KF5
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#include <KConfigGroup>
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#include <KLocalizedString>
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#include <KSharedConfig>
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// Qt
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#include <QCryptographicHash>
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#include <QSocketNotifier>
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#include <QPainter>
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// system
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#include <unistd.h>
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// drm
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include <libdrm/drm_mode.h>
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#ifndef DRM_CAP_CURSOR_WIDTH
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#define DRM_CAP_CURSOR_WIDTH 0x8
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#endif
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#ifndef DRM_CAP_CURSOR_HEIGHT
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#define DRM_CAP_CURSOR_HEIGHT 0x9
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#endif
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namespace KWin
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{
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DrmBackend::DrmBackend(QObject *parent)
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: Platform(parent)
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, m_udev(new Udev)
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, m_udevMonitor(m_udev->monitor())
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, m_dpmsFilter()
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{
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handleOutputs();
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m_cursor[0] = nullptr;
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m_cursor[1] = nullptr;
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}
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DrmBackend::~DrmBackend()
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{
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if (m_fd >= 0) {
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// wait for pageflips
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while (m_pageFlipsPending != 0) {
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QCoreApplication::processEvents(QEventLoop::WaitForMoreEvents);
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}
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qDeleteAll(m_outputs);
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delete m_cursor[0];
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delete m_cursor[1];
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close(m_fd);
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}
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}
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void DrmBackend::init()
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{
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LogindIntegration *logind = LogindIntegration::self();
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auto takeControl = [logind, this]() {
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if (logind->hasSessionControl()) {
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openDrm();
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} else {
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logind->takeControl();
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connect(logind, &LogindIntegration::hasSessionControlChanged, this, &DrmBackend::openDrm);
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}
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};
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if (logind->isConnected()) {
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takeControl();
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} else {
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connect(logind, &LogindIntegration::connectedChanged, this, takeControl);
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}
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}
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void DrmBackend::outputWentOff()
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{
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if (!m_dpmsFilter.isNull()) {
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// already another output is off
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return;
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}
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m_dpmsFilter.reset(new DpmsInputEventFilter(this));
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input()->prepandInputEventFilter(m_dpmsFilter.data());
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}
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void DrmBackend::turnOutputsOn()
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{
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m_dpmsFilter.reset();
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for (auto it = m_outputs.constBegin(), end = m_outputs.constEnd(); it != end; it++) {
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(*it)->setDpms(DrmOutput::DpmsMode::On);
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}
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}
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void DrmBackend::checkOutputsAreOn()
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{
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if (m_dpmsFilter.isNull()) {
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// already disabled, all outputs are on
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return;
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}
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for (auto it = m_outputs.constBegin(), end = m_outputs.constEnd(); it != end; it++) {
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if (!(*it)->isDpmsEnabled()) {
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// dpms still disabled, need to keep the filter
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return;
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}
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}
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// all outputs are on, disable the filter
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m_dpmsFilter.reset();
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}
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void DrmBackend::activate(bool active)
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{
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if (active) {
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reactivate();
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} else {
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deactivate();
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}
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}
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void DrmBackend::reactivate()
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{
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if (m_active) {
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return;
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}
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m_active = true;
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DrmBuffer *c = m_cursor[(m_cursorIndex + 1) % 2];
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const QPoint cp = Cursor::pos() - softwareCursorHotspot();
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for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
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DrmOutput *o = *it;
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o->pageFlipped();
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o->blank();
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o->showCursor(c);
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o->moveCursor(cp);
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}
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// restart compositor
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m_pageFlipsPending = 0;
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if (Compositor *compositor = Compositor::self()) {
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compositor->bufferSwapComplete();
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compositor->addRepaintFull();
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}
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}
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void DrmBackend::deactivate()
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{
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if (!m_active) {
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return;
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}
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// block compositor
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if (m_pageFlipsPending == 0 && Compositor::self()) {
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Compositor::self()->aboutToSwapBuffers();
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}
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// hide cursor and disable
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for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
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DrmOutput *o = *it;
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o->hideCursor();
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o->restoreSaved();
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}
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m_active = false;
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}
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void DrmBackend::pageFlipHandler(int fd, unsigned int frame, unsigned int sec, unsigned int usec, void *data)
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{
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Q_UNUSED(fd)
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Q_UNUSED(frame)
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Q_UNUSED(sec)
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Q_UNUSED(usec)
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auto output = reinterpret_cast<DrmOutput*>(data);
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output->pageFlipped();
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output->m_backend->m_pageFlipsPending--;
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if (output->m_backend->m_pageFlipsPending == 0) {
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// TODO: improve, this currently means we wait for all page flips or all outputs.
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// It would be better to driver the repaint per output
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if (Compositor::self()) {
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Compositor::self()->bufferSwapComplete();
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}
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}
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}
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void DrmBackend::openDrm()
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{
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connect(LogindIntegration::self(), &LogindIntegration::sessionActiveChanged, this, &DrmBackend::activate);
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UdevDevice::Ptr device = m_udev->primaryGpu();
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if (!device) {
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qCWarning(KWIN_DRM) << "Did not find a GPU";
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return;
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}
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int fd = LogindIntegration::self()->takeDevice(device->devNode());
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if (fd < 0) {
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qCWarning(KWIN_DRM) << "failed to open drm device at" << device->devNode();
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return;
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}
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m_fd = fd;
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m_active = true;
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QSocketNotifier *notifier = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);
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connect(notifier, &QSocketNotifier::activated, this,
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[this] {
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if (!LogindIntegration::self()->isActiveSession()) {
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return;
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}
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drmEventContext e;
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memset(&e, 0, sizeof e);
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e.version = DRM_EVENT_CONTEXT_VERSION;
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e.page_flip_handler = pageFlipHandler;
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drmHandleEvent(m_fd, &e);
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}
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);
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m_drmId = device->sysNum();
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queryResources();
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// setup udevMonitor
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if (m_udevMonitor) {
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m_udevMonitor->filterSubsystemDevType("drm");
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const int fd = m_udevMonitor->fd();
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if (fd != -1) {
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QSocketNotifier *notifier = new QSocketNotifier(fd, QSocketNotifier::Read, this);
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connect(notifier, &QSocketNotifier::activated, this,
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[this] {
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auto device = m_udevMonitor->getDevice();
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if (!device) {
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return;
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}
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if (device->sysNum() != m_drmId) {
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return;
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}
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if (device->hasProperty("HOTPLUG", "1")) {
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qCDebug(KWIN_DRM) << "Received hot plug event for monitored drm device";
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queryResources();
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m_cursorIndex = (m_cursorIndex + 1) % 2;
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updateCursor();
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}
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}
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);
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m_udevMonitor->enable();
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}
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}
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setReady(true);
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initCursor();
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}
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void DrmBackend::queryResources()
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{
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if (m_fd < 0) {
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return;
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}
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ScopedDrmPointer<_drmModeRes, &drmModeFreeResources> resources(drmModeGetResources(m_fd));
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if (!resources) {
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qCWarning(KWIN_DRM) << "drmModeGetResources failed";
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return;
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}
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QVector<DrmOutput*> connectedOutputs;
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for (int i = 0; i < resources->count_connectors; ++i) {
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const auto id = resources->connectors[i];
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ScopedDrmPointer<_drmModeConnector, &drmModeFreeConnector> connector(drmModeGetConnector(m_fd, id));
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if (!connector) {
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continue;
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}
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if (connector->connection != DRM_MODE_CONNECTED) {
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continue;
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}
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if (connector->count_modes == 0) {
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continue;
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}
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if (DrmOutput *o = findOutput(connector->connector_id)) {
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connectedOutputs << o;
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continue;
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}
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bool crtcFound = false;
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const quint32 crtcId = findCrtc(resources.data(), connector.data(), &crtcFound);
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if (!crtcFound) {
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continue;
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}
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ScopedDrmPointer<_drmModeCrtc, &drmModeFreeCrtc> crtc(drmModeGetCrtc(m_fd, crtcId));
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if (!crtc) {
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continue;
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}
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DrmOutput *drmOutput = new DrmOutput(this);
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connect(drmOutput, &DrmOutput::dpmsChanged, this, &DrmBackend::outputDpmsChanged);
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drmOutput->m_crtcId = crtcId;
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if (crtc->mode_valid) {
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drmOutput->m_mode = crtc->mode;
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} else {
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drmOutput->m_mode = connector->modes[0];
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}
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drmOutput->m_connector = connector->connector_id;
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drmOutput->init(connector.data());
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qCDebug(KWIN_DRM) << "Found new output with uuid" << drmOutput->uuid();
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connectedOutputs << drmOutput;
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}
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std::sort(connectedOutputs.begin(), connectedOutputs.end(), [] (DrmOutput *a, DrmOutput *b) { return a->m_connector < b->m_connector; });
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// check for outputs which got removed
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auto it = m_outputs.begin();
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while (it != m_outputs.end()) {
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if (connectedOutputs.contains(*it)) {
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it++;
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continue;
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}
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DrmOutput *removed = *it;
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it = m_outputs.erase(it);
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emit outputRemoved(removed);
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delete removed;
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}
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for (auto it = connectedOutputs.constBegin(); it != connectedOutputs.constEnd(); ++it) {
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if (!m_outputs.contains(*it)) {
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emit outputAdded(*it);
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}
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}
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m_outputs = connectedOutputs;
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readOutputsConfiguration();
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emit screensQueried();
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}
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void DrmBackend::readOutputsConfiguration()
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{
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if (m_outputs.isEmpty()) {
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return;
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}
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const QByteArray uuid = generateOutputConfigurationUuid();
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const auto outputGroup = kwinApp()->config()->group("DrmOutputs");
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const auto configGroup = outputGroup.group(uuid);
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qCDebug(KWIN_DRM) << "Reading output configuration for" << uuid;
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// default position goes from left to right
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QPoint pos(0, 0);
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for (auto it = m_outputs.begin(); it != m_outputs.end(); ++it) {
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const auto outputConfig = configGroup.group((*it)->uuid());
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(*it)->setGlobalPos(outputConfig.readEntry<QPoint>("Position", pos));
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// TODO: add mode
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pos.setX(pos.x() + (*it)->size().width());
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}
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}
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QByteArray DrmBackend::generateOutputConfigurationUuid() const
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{
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auto it = m_outputs.constBegin();
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if (m_outputs.size() == 1) {
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// special case: one output
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return (*it)->uuid();
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}
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QCryptographicHash hash(QCryptographicHash::Md5);
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for (; it != m_outputs.constEnd(); ++it) {
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hash.addData((*it)->uuid());
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}
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return hash.result().toHex().left(10);
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}
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void DrmBackend::configurationChangeRequested(KWayland::Server::OutputConfigurationInterface *config)
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{
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const auto changes = config->changes();
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for (auto it = changes.begin(); it != changes.end(); it++) {
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KWayland::Server::OutputChangeSet *changeset = it.value();
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auto drmoutput = findOutput(it.key()->uuid());
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if (drmoutput == nullptr) {
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qCWarning(KWIN_DRM) << "Could NOT find DrmOutput matching " << it.key()->uuid();
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return;
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}
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drmoutput->setChanges(changeset);
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}
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}
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DrmOutput *DrmBackend::findOutput(quint32 connector)
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{
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auto it = std::find_if(m_outputs.constBegin(), m_outputs.constEnd(), [connector] (DrmOutput *o) {
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return o->m_connector == connector;
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});
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if (it != m_outputs.constEnd()) {
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return *it;
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}
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return nullptr;
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}
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DrmOutput *DrmBackend::findOutput(const QByteArray &uuid)
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{
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auto it = std::find_if(m_outputs.constBegin(), m_outputs.constEnd(), [uuid] (DrmOutput *o) {
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return o->m_uuid == uuid;
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});
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if (it != m_outputs.constEnd()) {
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return *it;
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}
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return nullptr;
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}
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quint32 DrmBackend::findCrtc(drmModeRes *res, drmModeConnector *connector, bool *ok)
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{
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if (ok) {
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*ok = false;
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}
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ScopedDrmPointer<_drmModeEncoder, &drmModeFreeEncoder> encoder(drmModeGetEncoder(m_fd, connector->encoder_id));
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if (encoder) {
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if (!crtcIsUsed(encoder->crtc_id)) {
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if (ok) {
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*ok = true;
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}
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return encoder->crtc_id;
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}
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}
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// let's iterate over all encoders to find a suitable crtc
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for (int i = 0; i < connector->count_encoders; ++i) {
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ScopedDrmPointer<_drmModeEncoder, &drmModeFreeEncoder> encoder(drmModeGetEncoder(m_fd, connector->encoders[i]));
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if (!encoder) {
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continue;
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}
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for (int j = 0; j < res->count_crtcs; ++j) {
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if (!(encoder->possible_crtcs & (1 << j))) {
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continue;
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}
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if (!crtcIsUsed(res->crtcs[j])) {
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if (ok) {
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*ok = true;
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}
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return res->crtcs[j];
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}
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}
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}
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return 0;
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}
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bool DrmBackend::crtcIsUsed(quint32 crtc)
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{
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auto it = std::find_if(m_outputs.constBegin(), m_outputs.constEnd(),
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[crtc] (DrmOutput *o) {
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return o->m_crtcId == crtc;
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}
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);
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return it != m_outputs.constEnd();
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}
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void DrmBackend::present(DrmBuffer *buffer, DrmOutput *output)
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{
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if (output->present(buffer)) {
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m_pageFlipsPending++;
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if (m_pageFlipsPending == 1 && Compositor::self()) {
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Compositor::self()->aboutToSwapBuffers();
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}
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}
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}
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void DrmBackend::initCursor()
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{
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uint64_t capability = 0;
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QSize cursorSize;
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if (drmGetCap(m_fd, DRM_CAP_CURSOR_WIDTH, &capability) == 0) {
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cursorSize.setWidth(capability);
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} else {
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cursorSize.setWidth(64);
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}
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if (drmGetCap(m_fd, DRM_CAP_CURSOR_HEIGHT, &capability) == 0) {
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cursorSize.setHeight(capability);
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} else {
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cursorSize.setHeight(64);
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}
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m_cursor[0] = createBuffer(cursorSize);
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m_cursor[0]->map(QImage::Format_ARGB32_Premultiplied);
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m_cursor[0]->image()->fill(Qt::transparent);
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m_cursor[1] = createBuffer(cursorSize);
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m_cursor[1]->map(QImage::Format_ARGB32_Premultiplied);
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m_cursor[0]->image()->fill(Qt::transparent);
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// now we have screens and can set cursors, so start tracking
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connect(this, &DrmBackend::cursorChanged, this, &DrmBackend::updateCursor);
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connect(Cursor::self(), &Cursor::posChanged, this, &DrmBackend::moveCursor);
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}
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void DrmBackend::setCursor()
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{
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DrmBuffer *c = m_cursor[m_cursorIndex];
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m_cursorIndex = (m_cursorIndex + 1) % 2;
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for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
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(*it)->showCursor(c);
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}
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markCursorAsRendered();
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}
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void DrmBackend::updateCursor()
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{
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const QImage &cursorImage = softwareCursor();
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if (cursorImage.isNull()) {
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hideCursor();
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return;
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}
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QImage *c = m_cursor[m_cursorIndex]->image();
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c->fill(Qt::transparent);
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QPainter p;
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p.begin(c);
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p.drawImage(QPoint(0, 0), cursorImage);
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p.end();
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setCursor();
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moveCursor();
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}
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|
|
|
void DrmBackend::hideCursor()
|
|
{
|
|
for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
|
|
(*it)->hideCursor();
|
|
}
|
|
}
|
|
|
|
void DrmBackend::moveCursor()
|
|
{
|
|
const QPoint p = Cursor::pos() - softwareCursorHotspot();
|
|
for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
|
|
(*it)->moveCursor(p);
|
|
}
|
|
}
|
|
|
|
QSize DrmBackend::size() const
|
|
{
|
|
if (m_outputs.isEmpty()) {
|
|
return QSize();
|
|
}
|
|
return m_outputs.first()->size();
|
|
}
|
|
|
|
Screens *DrmBackend::createScreens(QObject *parent)
|
|
{
|
|
return new DrmScreens(this, parent);
|
|
}
|
|
|
|
QPainterBackend *DrmBackend::createQPainterBackend()
|
|
{
|
|
return new DrmQPainterBackend(this);
|
|
}
|
|
|
|
OpenGLBackend *DrmBackend::createOpenGLBackend()
|
|
{
|
|
#if HAVE_GBM
|
|
return new EglGbmBackend(this);
|
|
#else
|
|
return Platform::createOpenGLBackend();
|
|
#endif
|
|
}
|
|
|
|
DrmBuffer *DrmBackend::createBuffer(const QSize &size)
|
|
{
|
|
DrmBuffer *b = new DrmBuffer(this, size);
|
|
m_buffers << b;
|
|
return b;
|
|
}
|
|
|
|
DrmBuffer *DrmBackend::createBuffer(gbm_surface *surface)
|
|
{
|
|
#if HAVE_GBM
|
|
DrmBuffer *b = new DrmBuffer(this, surface);
|
|
m_buffers << b;
|
|
return b;
|
|
#else
|
|
return nullptr;
|
|
#endif
|
|
}
|
|
|
|
void DrmBackend::bufferDestroyed(DrmBuffer *b)
|
|
{
|
|
m_buffers.removeAll(b);
|
|
}
|
|
|
|
void DrmBackend::outputDpmsChanged()
|
|
{
|
|
if (m_outputs.isEmpty()) {
|
|
return;
|
|
}
|
|
bool enabled = false;
|
|
for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
|
|
enabled = enabled || (*it)->isDpmsEnabled();
|
|
}
|
|
setOutputsEnabled(enabled);
|
|
}
|
|
|
|
|
|
}
|