647 lines
18 KiB
C++
647 lines
18 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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SPDX-FileCopyrightText: 2015 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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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 "drm_object_connector.h"
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#include "drm_object_crtc.h"
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#include "drm_object_plane.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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#include <gbm.h>
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#include "gbm_dmabuf.h"
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#endif
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#if HAVE_EGL_STREAMS
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#include "egl_stream_backend.h"
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#endif
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// KWayland
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#include <KWaylandServer/seat_interface.h>
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// KF5
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#include <KConfigGroup>
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#include <KCoreAddons>
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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 <algorithm>
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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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#include "drm_gpu.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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#define KWIN_DRM_EVENT_CONTEXT_VERSION 2
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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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#if HAVE_EGL_STREAMS
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if (qEnvironmentVariableIsSet("KWIN_DRM_USE_EGL_STREAMS")) {
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m_useEglStreams = true;
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}
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#endif
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setSupportsGammaControl(true);
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supportsOutputChanges();
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}
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DrmBackend::~DrmBackend()
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{
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if (m_gpus.size() > 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_gpus);
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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::prepareShutdown()
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{
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writeOutputsConfiguration();
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for (DrmOutput *output : m_outputs) {
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output->teardown();
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}
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Platform::prepareShutdown();
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}
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Outputs DrmBackend::outputs() const
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{
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return m_outputs;
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}
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Outputs DrmBackend::enabledOutputs() const
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{
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return m_enabledOutputs;
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}
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void DrmBackend::createDpmsFilter()
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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()->prependInputEventFilter(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_enabledOutputs.constBegin(), end = m_enabledOutputs.constEnd(); it != end; it++) {
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(*it)->updateDpms(KWaylandServer::OutputInterface::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_enabledOutputs.constBegin(), end = m_enabledOutputs.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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qCDebug(KWIN_DRM) << "Activating session.";
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reactivate();
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} else {
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qCDebug(KWIN_DRM) << "Deactivating session.";
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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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if (!usesSoftwareCursor()) {
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Cursor* cursor = Cursors::self()->mouse();
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const QPoint cp = cursor->pos() - cursor->hotspot();
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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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// only relevant in atomic mode
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o->m_modesetRequested = true;
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o->m_crtc->blank();
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o->showCursor();
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o->moveCursor(cursor, cp);
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}
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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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}
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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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std::vector<UdevDevice::Ptr> devices = m_udev->listGPUs();
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if (devices.size() == 0) {
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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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for (unsigned int gpu_index = 0; gpu_index < devices.size(); gpu_index++) {
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auto device = std::move(devices.at(gpu_index));
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auto devNode = QByteArray(device->devNode());
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int fd = LogindIntegration::self()->takeDevice(devNode.constData());
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if (fd < 0) {
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qCWarning(KWIN_DRM) << "failed to open drm device at" << devNode;
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return;
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}
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m_active = true;
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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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[fd] {
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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 = KWIN_DRM_EVENT_CONTEXT_VERSION;
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e.page_flip_handler = pageFlipHandler;
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drmHandleEvent(fd, &e);
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}
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);
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DrmGpu *gpu = new DrmGpu(this, devNode, fd, device->sysNum());
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connect(gpu, &DrmGpu::outputAdded, this, &DrmBackend::addOutput);
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connect(gpu, &DrmGpu::outputRemoved, this, &DrmBackend::removeOutput);
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m_gpus.append(gpu);
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break;
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}
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// trying to activate Atomic Mode Setting (this means also Universal Planes)
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if (!qEnvironmentVariableIsSet("KWIN_DRM_NO_AMS")) {
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for (auto gpu : m_gpus)
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gpu->tryAMS();
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}
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initCursor();
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if (!updateOutputs())
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return;
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if (m_outputs.isEmpty()) {
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qCDebug(KWIN_DRM) << "No connected outputs found on startup.";
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}
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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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bool drm = false;
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for (auto gpu : m_gpus) {
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if (gpu->drmId() == device->sysNum()) {
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drm = true;
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break;
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}
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}
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if (!drm) {
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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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updateOutputs();
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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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}
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void DrmBackend::addOutput(DrmOutput *o)
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{
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m_outputs.append(o);
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m_enabledOutputs.append(o);
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emit o->gpu()->outputEnabled(o);
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}
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void DrmBackend::removeOutput(DrmOutput *o)
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{
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emit o->gpu()->outputDisabled(o);
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m_outputs.removeOne(o);
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m_enabledOutputs.removeOne(o);
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}
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bool DrmBackend::updateOutputs()
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{
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if (m_gpus.size() == 0) {
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return false;
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}
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for (auto gpu : m_gpus)
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gpu->updateOutputs();
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std::sort(m_outputs.begin(), m_outputs.end(), [] (DrmOutput *a, DrmOutput *b) { return a->m_conn->id() < b->m_conn->id(); });
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readOutputsConfiguration();
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updateOutputsEnabled();
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if (!m_outputs.isEmpty()) {
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emit screensQueried();
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}
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return true;
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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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// 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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qCDebug(KWIN_DRM) << "Reading output configuration for [" << uuid << "] ["<< (*it)->uuid() << "]";
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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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if (outputConfig.hasKey("Scale"))
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(*it)->setScale(outputConfig.readEntry("Scale", 1.0));
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pos.setX(pos.x() + (*it)->geometry().width());
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}
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}
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void DrmBackend::writeOutputsConfiguration()
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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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auto configGroup = KSharedConfig::openConfig()->group("DrmOutputs").group(uuid);
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// default position goes from left to right
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for (auto it = m_outputs.cbegin(); it != m_outputs.cend(); ++it) {
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qCDebug(KWIN_DRM) << "Writing output configuration for [" << uuid << "] ["<< (*it)->uuid() << "]";
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auto outputConfig = configGroup.group((*it)->uuid());
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outputConfig.writeEntry("Scale", (*it)->scale());
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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::enableOutput(DrmOutput *output, bool enable)
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{
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if (enable) {
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Q_ASSERT(!m_enabledOutputs.contains(output));
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m_enabledOutputs << output;
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emit output->gpu()->outputEnabled(output);
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} else {
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Q_ASSERT(m_enabledOutputs.contains(output));
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m_enabledOutputs.removeOne(output);
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Q_ASSERT(!m_enabledOutputs.contains(output));
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emit output->gpu()->outputDisabled(output);
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}
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updateOutputsEnabled();
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checkOutputsAreOn();
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emit screensQueried();
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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_conn->id() == 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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bool DrmBackend::present(DrmBuffer *buffer, DrmOutput *output)
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{
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if (!buffer || buffer->bufferId() == 0) {
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if (m_deleteBufferAfterPageFlip) {
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delete buffer;
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}
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return false;
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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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return true;
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} else if (m_deleteBufferAfterPageFlip) {
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delete buffer;
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}
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return false;
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}
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void DrmBackend::initCursor()
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{
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#if HAVE_EGL_STREAMS
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// Hardware cursors aren't currently supported with EGLStream backend,
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// possibly an NVIDIA driver bug
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if (m_useEglStreams) {
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setSoftWareCursor(true);
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}
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#endif
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m_cursorEnabled = waylandServer()->seat()->hasPointer();
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connect(waylandServer()->seat(), &KWaylandServer::SeatInterface::hasPointerChanged, this,
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[this] {
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m_cursorEnabled = waylandServer()->seat()->hasPointer();
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if (usesSoftwareCursor()) {
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return;
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}
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for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
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if (m_cursorEnabled) {
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if (!(*it)->showCursor()) {
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setSoftWareCursor(true);
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break;
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}
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} else {
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(*it)->hideCursor();
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}
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}
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}
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);
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uint64_t capability = 0;
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QSize cursorSize;
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cursorSize.setWidth(64);
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for (auto gpu : m_gpus) {
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if (drmGetCap(gpu->fd(), DRM_CAP_CURSOR_WIDTH, &capability) == 0) {
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cursorSize.setWidth(capability);
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}
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}
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cursorSize.setHeight(64);
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for (auto gpu : m_gpus) {
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if (drmGetCap(gpu->fd(), DRM_CAP_CURSOR_HEIGHT, &capability) == 0) {
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cursorSize.setHeight(capability);
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}
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}
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m_cursorSize = cursorSize;
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// now we have screens and can set cursors, so start tracking
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connect(Cursors::self(), &Cursors::currentCursorChanged, this, &DrmBackend::updateCursor);
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connect(Cursors::self(), &Cursors::positionChanged, this, &DrmBackend::moveCursor);
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}
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void DrmBackend::setCursor()
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{
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if (m_cursorEnabled) {
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for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
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if (!(*it)->showCursor()) {
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setSoftWareCursor(true);
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}
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}
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}
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Cursors::self()->currentCursor()->markAsRendered();
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}
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void DrmBackend::updateCursor()
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{
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if (usesSoftwareCursor()) {
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return;
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}
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if (isCursorHidden()) {
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return;
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}
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auto cursor = Cursors::self()->currentCursor();
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const QImage &cursorImage = cursor->image();
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if (cursorImage.isNull()) {
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doHideCursor();
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return;
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}
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for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
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(*it)->updateCursor();
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}
|
|
|
|
setCursor();
|
|
|
|
moveCursor(cursor, cursor->pos());
|
|
}
|
|
|
|
void DrmBackend::doShowCursor()
|
|
{
|
|
updateCursor();
|
|
}
|
|
|
|
void DrmBackend::doHideCursor()
|
|
{
|
|
if (!m_cursorEnabled || usesSoftwareCursor()) {
|
|
return;
|
|
}
|
|
for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
|
|
(*it)->hideCursor();
|
|
}
|
|
}
|
|
|
|
void DrmBackend::moveCursor(Cursor *cursor, const QPoint &pos)
|
|
{
|
|
if (!m_cursorEnabled || isCursorHidden() || usesSoftwareCursor()) {
|
|
return;
|
|
}
|
|
for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
|
|
(*it)->moveCursor(cursor, pos);
|
|
}
|
|
}
|
|
|
|
Screens *DrmBackend::createScreens(QObject *parent)
|
|
{
|
|
return new DrmScreens(this, parent);
|
|
}
|
|
|
|
QPainterBackend *DrmBackend::createQPainterBackend()
|
|
{
|
|
m_deleteBufferAfterPageFlip = false;
|
|
return new DrmQPainterBackend(this, m_gpus.at(0));
|
|
}
|
|
|
|
OpenGLBackend *DrmBackend::createOpenGLBackend()
|
|
{
|
|
#if HAVE_EGL_STREAMS
|
|
if (m_useEglStreams) {
|
|
m_deleteBufferAfterPageFlip = false;
|
|
return new EglStreamBackend(this, m_gpus.at(0));
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_GBM
|
|
m_deleteBufferAfterPageFlip = true;
|
|
return new EglGbmBackend(this, m_gpus.at(0));
|
|
#else
|
|
return Platform::createOpenGLBackend();
|
|
#endif
|
|
}
|
|
|
|
void DrmBackend::updateOutputsEnabled()
|
|
{
|
|
bool enabled = false;
|
|
for (auto it = m_enabledOutputs.constBegin(); it != m_enabledOutputs.constEnd(); ++it) {
|
|
enabled = enabled || (*it)->isDpmsEnabled();
|
|
}
|
|
setOutputsEnabled(enabled);
|
|
}
|
|
|
|
QVector<CompositingType> DrmBackend::supportedCompositors() const
|
|
{
|
|
if (selectedCompositor() != NoCompositing) {
|
|
return {selectedCompositor()};
|
|
}
|
|
#if HAVE_GBM
|
|
return QVector<CompositingType>{OpenGLCompositing, QPainterCompositing};
|
|
#elif HAVE_EGL_STREAMS
|
|
return m_useEglStreams ?
|
|
QVector<CompositingType>{OpenGLCompositing, QPainterCompositing} :
|
|
QVector<CompositingType>{QPainterCompositing};
|
|
#else
|
|
return QVector<CompositingType>{QPainterCompositing};
|
|
#endif
|
|
}
|
|
|
|
QString DrmBackend::supportInformation() const
|
|
{
|
|
QString supportInfo;
|
|
QDebug s(&supportInfo);
|
|
s.nospace();
|
|
s << "Name: " << "DRM" << Qt::endl;
|
|
s << "Active: " << m_active << Qt::endl;
|
|
for (int g = 0; g < m_gpus.size(); g++) {
|
|
s << "Atomic Mode Setting on GPU " << g << ": " << m_gpus.at(g)->atomicModeSetting() << Qt::endl;
|
|
}
|
|
#if HAVE_EGL_STREAMS
|
|
s << "Using EGL Streams: " << m_useEglStreams << Qt::endl;
|
|
#endif
|
|
return supportInfo;
|
|
}
|
|
|
|
DmaBufTexture *DrmBackend::createDmaBufTexture(const QSize &size)
|
|
{
|
|
#if HAVE_GBM
|
|
// gpu_index is a fixed 0 here
|
|
// as the first GPU is assumed to always be the one used for scene rendering
|
|
// and this function is only used for Pipewire
|
|
return GbmDmaBuf::createBuffer(size, m_gpus.at(0)->gbmDevice());
|
|
#else
|
|
return nullptr;
|
|
#endif
|
|
}
|
|
|
|
}
|