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kwin/backends/drm/drm_backend.cpp
Martin Gräßlin 57b11f8429 [backends/drm] Use an InputEventFilter to reenable outputs 
So far the DrmOutput connected to all input events when going into
power saving. As we now have the input filters it's better to just
install a filter when an output goes into powersave and remove the
input filter again when all outputs are enabled again.

To make this work InputRedirection gains a new method to add a new
filter as the first filter. This is a potentially dangerous method
as it allows to have a filter before LockScreenFilter gets the
events. But in case of DPMS it's something we actually want.

A nice new feature possible with the input filter is that we can
filter out the event which re-enables the outputs. Thus when getting
on a system with output off and screen locked, the first key hit
doesn't go to the lock screen.

Reviewed-By: Bhushan Shah
BUG: 341201
Fixed-in: 5.6.0 (Wayland-only)
2016-02-15 15:53:43 +01:00

1217 lines
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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "drm_backend.h"
#include "composite.h"
#include "cursor.h"
#include "logging.h"
#include "logind.h"
#include "scene_qpainter_drm_backend.h"
#include "screens_drm.h"
#include "udev.h"
#include "virtual_terminal.h"
#include "wayland_server.h"
#if HAVE_GBM
#include "egl_gbm_backend.h"
#endif
// KWayland
#include <KWayland/Server/display.h>
#include <KWayland/Server/output_interface.h>
// KF5
#include <KConfigGroup>
#include <KLocalizedString>
#include <KSharedConfig>
// Qt
#include <QCryptographicHash>
#include <QSocketNotifier>
#include <QPainter>
// system
#include <unistd.h>
#include <sys/mman.h>
// drm
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <libdrm/drm_mode.h>
#if HAVE_GBM
#include <gbm.h>
#endif
#ifndef DRM_CAP_CURSOR_WIDTH
#define DRM_CAP_CURSOR_WIDTH 0x8
#endif
#ifndef DRM_CAP_CURSOR_HEIGHT
#define DRM_CAP_CURSOR_HEIGHT 0x9
#endif
namespace KWin
{
DpmsInputEventFilter::DpmsInputEventFilter(DrmBackend *backend)
: InputEventFilter()
, m_backend(backend)
{
}
DpmsInputEventFilter::~DpmsInputEventFilter() = default;
bool DpmsInputEventFilter::pointerEvent(QMouseEvent *event, quint32 nativeButton)
{
Q_UNUSED(event)
Q_UNUSED(nativeButton)
notify();
return true;
}
bool DpmsInputEventFilter::wheelEvent(QWheelEvent *event)
{
Q_UNUSED(event)
notify();
return true;
}
bool DpmsInputEventFilter::keyEvent(QKeyEvent *event)
{
Q_UNUSED(event)
notify();
return true;
}
void DpmsInputEventFilter::notify()
{
// queued to not modify the list of event filters while filtering
QMetaObject::invokeMethod(m_backend, "turnOututsOn", Qt::QueuedConnection);
}
DrmBackend::DrmBackend(QObject *parent)
: AbstractBackend(parent)
, m_udev(new Udev)
, m_udevMonitor(m_udev->monitor())
, m_dpmsFilter()
{
handleOutputs();
m_cursor[0] = nullptr;
m_cursor[1] = nullptr;
}
DrmBackend::~DrmBackend()
{
if (m_fd >= 0) {
// wait for pageflips
while (m_pageFlipsPending != 0) {
QCoreApplication::processEvents(QEventLoop::WaitForMoreEvents);
}
qDeleteAll(m_outputs);
delete m_cursor[0];
delete m_cursor[1];
close(m_fd);
}
}
void DrmBackend::init()
{
LogindIntegration *logind = LogindIntegration::self();
auto takeControl = [logind, this]() {
if (logind->hasSessionControl()) {
openDrm();
} else {
logind->takeControl();
connect(logind, &LogindIntegration::hasSessionControlChanged, this, &DrmBackend::openDrm);
}
};
if (logind->isConnected()) {
takeControl();
} else {
connect(logind, &LogindIntegration::connectedChanged, this, takeControl);
}
auto v = VirtualTerminal::create(this);
connect(v, &VirtualTerminal::activeChanged, this, &DrmBackend::activate);
}
void DrmBackend::outputWentOff()
{
if (!m_dpmsFilter.isNull()) {
// already another output is off
return;
}
m_dpmsFilter.reset(new DpmsInputEventFilter(this));
input()->prepandInputEventFilter(m_dpmsFilter.data());
}
void DrmBackend::turnOututsOn()
{
m_dpmsFilter.reset();
for (auto it = m_outputs.constBegin(), end = m_outputs.constEnd(); it != end; it++) {
(*it)->setDpms(DrmOutput::DpmsMode::On);
}
}
void DrmBackend::checkOutputsAreOn()
{
if (m_dpmsFilter.isNull()) {
// already disabled, all outputs are on
return;
}
for (auto it = m_outputs.constBegin(), end = m_outputs.constEnd(); it != end; it++) {
if (!(*it)->isDpmsEnabled()) {
// dpms still disabled, need to keep the filter
return;
}
}
// all outputs are on, disable the filter
m_dpmsFilter.reset();
}
void DrmBackend::activate(bool active)
{
if (active) {
reactivate();
} else {
deactivate();
}
}
void DrmBackend::reactivate()
{
if (m_active) {
return;
}
m_active = true;
DrmBuffer *c = m_cursor[(m_cursorIndex + 1) % 2];
const QPoint cp = Cursor::pos() - softwareCursorHotspot();
for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
DrmOutput *o = *it;
o->pageFlipped();
o->blank();
o->showCursor(c);
o->moveCursor(cp);
}
// restart compositor
m_pageFlipsPending = 0;
if (Compositor *compositor = Compositor::self()) {
compositor->bufferSwapComplete();
compositor->addRepaintFull();
}
}
void DrmBackend::deactivate()
{
if (!m_active) {
return;
}
// block compositor
if (m_pageFlipsPending == 0 && Compositor::self()) {
Compositor::self()->aboutToSwapBuffers();
}
// hide cursor and disable
for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
DrmOutput *o = *it;
o->hideCursor();
o->restoreSaved();
}
m_active = false;
}
void DrmBackend::pageFlipHandler(int fd, unsigned int frame, unsigned int sec, unsigned int usec, void *data)
{
Q_UNUSED(fd)
Q_UNUSED(frame)
Q_UNUSED(sec)
Q_UNUSED(usec)
auto output = reinterpret_cast<DrmOutput*>(data);
output->pageFlipped();
output->m_backend->m_pageFlipsPending--;
if (output->m_backend->m_pageFlipsPending == 0) {
// TODO: improve, this currently means we wait for all page flips or all outputs.
// It would be better to driver the repaint per output
if (Compositor::self()) {
Compositor::self()->bufferSwapComplete();
}
}
}
void DrmBackend::openDrm()
{
connect(LogindIntegration::self(), &LogindIntegration::sessionActiveChanged, this, &DrmBackend::activate);
VirtualTerminal::self()->init();
UdevDevice::Ptr device = m_udev->primaryGpu();
if (!device) {
qCWarning(KWIN_DRM) << "Did not find a GPU";
return;
}
int fd = LogindIntegration::self()->takeDevice(device->devNode());
if (fd < 0) {
qCWarning(KWIN_DRM) << "failed to open drm device at" << device->devNode();
return;
}
m_fd = fd;
m_active = true;
QSocketNotifier *notifier = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);
connect(notifier, &QSocketNotifier::activated, this,
[this] {
if (!VirtualTerminal::self()->isActive()) {
return;
}
drmEventContext e;
memset(&e, 0, sizeof e);
e.version = DRM_EVENT_CONTEXT_VERSION;
e.page_flip_handler = pageFlipHandler;
drmHandleEvent(m_fd, &e);
}
);
m_drmId = device->sysNum();
queryResources();
// setup udevMonitor
if (m_udevMonitor) {
m_udevMonitor->filterSubsystemDevType("drm");
const int fd = m_udevMonitor->fd();
if (fd != -1) {
QSocketNotifier *notifier = new QSocketNotifier(fd, QSocketNotifier::Read, this);
connect(notifier, &QSocketNotifier::activated, this,
[this] {
auto device = m_udevMonitor->getDevice();
if (!device) {
return;
}
if (device->sysNum() != m_drmId) {
return;
}
if (device->hasProperty("HOTPLUG", "1")) {
qCDebug(KWIN_DRM) << "Received hot plug event for monitored drm device";
queryResources();
m_cursorIndex = (m_cursorIndex + 1) % 2;
updateCursor();
}
}
);
m_udevMonitor->enable();
}
}
setReady(true);
initCursor();
}
void DrmBackend::queryResources()
{
if (m_fd < 0) {
return;
}
ScopedDrmPointer<_drmModeRes, &drmModeFreeResources> resources(drmModeGetResources(m_fd));
if (!resources) {
qCWarning(KWIN_DRM) << "drmModeGetResources failed";
return;
}
QVector<DrmOutput*> connectedOutputs;
for (int i = 0; i < resources->count_connectors; ++i) {
const auto id = resources->connectors[i];
ScopedDrmPointer<_drmModeConnector, &drmModeFreeConnector> connector(drmModeGetConnector(m_fd, id));
if (!connector) {
continue;
}
if (connector->connection != DRM_MODE_CONNECTED) {
continue;
}
if (connector->count_modes == 0) {
continue;
}
if (DrmOutput *o = findOutput(connector->connector_id)) {
connectedOutputs << o;
continue;
}
bool crtcFound = false;
const quint32 crtcId = findCrtc(resources.data(), connector.data(), &crtcFound);
if (!crtcFound) {
continue;
}
ScopedDrmPointer<_drmModeCrtc, &drmModeFreeCrtc> crtc(drmModeGetCrtc(m_fd, crtcId));
if (!crtc) {
continue;
}
DrmOutput *drmOutput = new DrmOutput(this);
connect(drmOutput, &DrmOutput::dpmsChanged, this, &DrmBackend::outputDpmsChanged);
drmOutput->m_crtcId = crtcId;
if (crtc->mode_valid) {
drmOutput->m_mode = crtc->mode;
} else {
drmOutput->m_mode = connector->modes[0];
}
drmOutput->m_connector = connector->connector_id;
drmOutput->init(connector.data());
qCDebug(KWIN_DRM) << "Found new output with uuid" << drmOutput->uuid();
connectedOutputs << drmOutput;
}
std::sort(connectedOutputs.begin(), connectedOutputs.end(), [] (DrmOutput *a, DrmOutput *b) { return a->m_connector < b->m_connector; });
// check for outputs which got removed
auto it = m_outputs.begin();
while (it != m_outputs.end()) {
if (connectedOutputs.contains(*it)) {
it++;
continue;
}
DrmOutput *removed = *it;
it = m_outputs.erase(it);
emit outputRemoved(removed);
delete removed;
}
for (auto it = connectedOutputs.constBegin(); it != connectedOutputs.constEnd(); ++it) {
if (!m_outputs.contains(*it)) {
emit outputAdded(*it);
}
}
m_outputs = connectedOutputs;
readOutputsConfiguration();
emit screensQueried();
}
void DrmBackend::readOutputsConfiguration()
{
if (m_outputs.isEmpty()) {
return;
}
const QByteArray uuid = generateOutputConfigurationUuid();
const auto outputGroup = kwinApp()->config()->group("DrmOutputs");
const auto configGroup = outputGroup.group(uuid);
qCDebug(KWIN_DRM) << "Reading output configuration for" << uuid;
// default position goes from left to right
QPoint pos(0, 0);
for (auto it = m_outputs.begin(); it != m_outputs.end(); ++it) {
const auto outputConfig = configGroup.group((*it)->uuid());
(*it)->setGlobalPos(outputConfig.readEntry<QPoint>("Position", pos));
// TODO: add mode
pos.setX(pos.x() + (*it)->size().width());
}
}
QByteArray DrmBackend::generateOutputConfigurationUuid() const
{
auto it = m_outputs.constBegin();
if (m_outputs.size() == 1) {
// special case: one output
return (*it)->uuid();
}
QCryptographicHash hash(QCryptographicHash::Md5);
for (; it != m_outputs.constEnd(); ++it) {
hash.addData((*it)->uuid());
}
return hash.result().toHex().left(10);
}
DrmOutput *DrmBackend::findOutput(quint32 connector)
{
auto it = std::find_if(m_outputs.constBegin(), m_outputs.constEnd(), [connector] (DrmOutput *o) {
return o->m_connector == connector;
});
if (it != m_outputs.constEnd()) {
return *it;
}
return nullptr;
}
quint32 DrmBackend::findCrtc(drmModeRes *res, drmModeConnector *connector, bool *ok)
{
if (ok) {
*ok = false;
}
ScopedDrmPointer<_drmModeEncoder, &drmModeFreeEncoder> encoder(drmModeGetEncoder(m_fd, connector->encoder_id));
if (encoder) {
if (!crtcIsUsed(encoder->crtc_id)) {
if (ok) {
*ok = true;
}
return encoder->crtc_id;
}
}
// let's iterate over all encoders to find a suitable crtc
for (int i = 0; i < connector->count_encoders; ++i) {
ScopedDrmPointer<_drmModeEncoder, &drmModeFreeEncoder> encoder(drmModeGetEncoder(m_fd, connector->encoders[i]));
if (!encoder) {
continue;
}
for (int j = 0; j < res->count_crtcs; ++j) {
if (!(encoder->possible_crtcs & (1 << j))) {
continue;
}
if (!crtcIsUsed(res->crtcs[j])) {
if (ok) {
*ok = true;
}
return res->crtcs[j];
}
}
}
return 0;
}
bool DrmBackend::crtcIsUsed(quint32 crtc)
{
auto it = std::find_if(m_outputs.constBegin(), m_outputs.constEnd(),
[crtc] (DrmOutput *o) {
return o->m_crtcId == crtc;
}
);
return it != m_outputs.constEnd();
}
void DrmBackend::present(DrmBuffer *buffer, DrmOutput *output)
{
if (output->present(buffer)) {
m_pageFlipsPending++;
if (m_pageFlipsPending == 1 && Compositor::self()) {
Compositor::self()->aboutToSwapBuffers();
}
}
}
void DrmBackend::installCursorFromServer()
{
updateCursorFromServer();
}
void DrmBackend::installCursorImage(Qt::CursorShape shape)
{
updateCursorImage(shape);
}
void DrmBackend::initCursor()
{
uint64_t capability = 0;
QSize cursorSize;
if (drmGetCap(m_fd, DRM_CAP_CURSOR_WIDTH, &capability) == 0) {
cursorSize.setWidth(capability);
} else {
cursorSize.setWidth(64);
}
if (drmGetCap(m_fd, DRM_CAP_CURSOR_HEIGHT, &capability) == 0) {
cursorSize.setHeight(capability);
} else {
cursorSize.setHeight(64);
}
m_cursor[0] = createBuffer(cursorSize);
m_cursor[0]->map(QImage::Format_ARGB32_Premultiplied);
m_cursor[0]->image()->fill(Qt::transparent);
m_cursor[1] = createBuffer(cursorSize);
m_cursor[1]->map(QImage::Format_ARGB32_Premultiplied);
m_cursor[0]->image()->fill(Qt::transparent);
// now we have screens and can set cursors, so start tracking
connect(this, &DrmBackend::cursorChanged, this, &DrmBackend::updateCursor);
connect(Cursor::self(), &Cursor::posChanged, this, &DrmBackend::moveCursor);
installCursorImage(Qt::ArrowCursor);
}
void DrmBackend::setCursor()
{
DrmBuffer *c = m_cursor[m_cursorIndex];
m_cursorIndex = (m_cursorIndex + 1) % 2;
for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
(*it)->showCursor(c);
}
}
void DrmBackend::updateCursor()
{
const QImage &cursorImage = softwareCursor();
if (cursorImage.isNull()) {
hideCursor();
return;
}
QImage *c = m_cursor[m_cursorIndex]->image();
c->fill(Qt::transparent);
QPainter p;
p.begin(c);
p.drawImage(QPoint(0, 0), cursorImage);
p.end();
setCursor();
moveCursor();
}
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 AbstractBackend::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);
}
DrmOutput::DrmOutput(DrmBackend *backend)
: QObject()
, m_backend(backend)
{
}
DrmOutput::~DrmOutput()
{
hideCursor();
cleanupBlackBuffer();
delete m_waylandOutput.data();
}
void DrmOutput::hideCursor()
{
drmModeSetCursor(m_backend->fd(), m_crtcId, 0, 0, 0);
}
void DrmOutput::restoreSaved()
{
if (!m_savedCrtc.isNull()) {
drmModeSetCrtc(m_backend->fd(), m_savedCrtc->crtc_id, m_savedCrtc->buffer_id,
m_savedCrtc->x, m_savedCrtc->y, &m_connector, 1, &m_savedCrtc->mode);
}
}
void DrmOutput::showCursor(DrmBuffer *c)
{
const QSize &s = c->size();
drmModeSetCursor(m_backend->fd(), m_crtcId, c->handle(), s.width(), s.height());
}
void DrmOutput::moveCursor(const QPoint &globalPos)
{
const QPoint p = globalPos - m_globalPos;
drmModeMoveCursor(m_backend->fd(), m_crtcId, p.x(), p.y());
}
QSize DrmOutput::size() const
{
return QSize(m_mode.hdisplay, m_mode.vdisplay);
}
QRect DrmOutput::geometry() const
{
return QRect(m_globalPos, size());
}
bool DrmOutput::present(DrmBuffer *buffer)
{
if (!buffer || buffer->bufferId() == 0) {
return false;
}
if (!VirtualTerminal::self()->isActive()) {
m_currentBuffer = buffer;
return false;
}
if (m_dpmsMode != DpmsMode::On) {
return false;
}
if (m_currentBuffer) {
return false;
}
if (m_lastStride != buffer->stride() || m_lastGbm != buffer->isGbm()) {
// need to set a new mode first
if (!setMode(buffer)) {
return false;
}
}
const bool ok = drmModePageFlip(m_backend->fd(), m_crtcId, buffer->bufferId(), DRM_MODE_PAGE_FLIP_EVENT, this) == 0;
if (ok) {
m_currentBuffer = buffer;
} else {
qCWarning(KWIN_DRM) << "Page flip failed";
buffer->releaseGbm();
}
return ok;
}
void DrmOutput::pageFlipped()
{
if (!m_currentBuffer) {
return;
}
m_currentBuffer->releaseGbm();
m_currentBuffer = nullptr;
cleanupBlackBuffer();
}
void DrmOutput::cleanupBlackBuffer()
{
if (m_blackBuffer) {
delete m_blackBuffer;
m_blackBuffer = nullptr;
}
}
static KWayland::Server::OutputInterface::DpmsMode toWaylandDpmsMode(DrmOutput::DpmsMode mode)
{
using namespace KWayland::Server;
switch (mode) {
case DrmOutput::DpmsMode::On:
return OutputInterface::DpmsMode::On;
case DrmOutput::DpmsMode::Standby:
return OutputInterface::DpmsMode::Standby;
case DrmOutput::DpmsMode::Suspend:
return OutputInterface::DpmsMode::Suspend;
case DrmOutput::DpmsMode::Off:
return OutputInterface::DpmsMode::Off;
default:
Q_UNREACHABLE();
}
}
static DrmOutput::DpmsMode fromWaylandDpmsMode(KWayland::Server::OutputInterface::DpmsMode wlMode)
{
using namespace KWayland::Server;
switch (wlMode) {
case OutputInterface::DpmsMode::On:
return DrmOutput::DpmsMode::On;
case OutputInterface::DpmsMode::Standby:
return DrmOutput::DpmsMode::Standby;
case OutputInterface::DpmsMode::Suspend:
return DrmOutput::DpmsMode::Suspend;
case OutputInterface::DpmsMode::Off:
return DrmOutput::DpmsMode::Off;
default:
Q_UNREACHABLE();
}
}
void DrmOutput::init(drmModeConnector *connector)
{
initEdid(connector);
initDpms(connector);
initUuid();
m_savedCrtc.reset(drmModeGetCrtc(m_backend->fd(), m_crtcId));
blank();
setDpms(DpmsMode::On);
if (!m_waylandOutput.isNull()) {
delete m_waylandOutput.data();
m_waylandOutput.clear();
}
m_waylandOutput = waylandServer()->display()->createOutput();
if (!m_edid.eisaId.isEmpty()) {
m_waylandOutput->setManufacturer(QString::fromLatin1(m_edid.eisaId));
} else {
m_waylandOutput->setManufacturer(i18n("unknown"));
}
if (!m_edid.monitorName.isEmpty()) {
QString model = QString::fromLatin1(m_edid.monitorName);
if (!m_edid.serialNumber.isEmpty()) {
model.append('/');
model.append(QString::fromLatin1(m_edid.serialNumber));
}
m_waylandOutput->setModel(model);
} else if (!m_edid.serialNumber.isEmpty()) {
m_waylandOutput->setModel(QString::fromLatin1(m_edid.serialNumber));
} else {
m_waylandOutput->setModel(i18n("unknown"));
}
QSize physicalSize = !m_edid.physicalSize.isEmpty() ? m_edid.physicalSize : QSize(connector->mmWidth, connector->mmHeight);
// the size might be completely borked. E.g. Samsung SyncMaster 2494HS reports 160x90 while in truth it's 520x292
// as this information is used to calculate DPI info, it's going to result in everything being huge
const QByteArray unknown = QByteArrayLiteral("unkown");
KConfigGroup group = kwinApp()->config()->group("EdidOverwrite").group(m_edid.eisaId.isEmpty() ? unknown : m_edid.eisaId)
.group(m_edid.monitorName.isEmpty() ? unknown : m_edid.monitorName)
.group(m_edid.serialNumber.isEmpty() ? unknown : m_edid.serialNumber);
if (group.hasKey("PhysicalSize")) {
const QSize overwriteSize = group.readEntry("PhysicalSize", physicalSize);
qCWarning(KWIN_DRM) << "Overwriting monitor physical size for" << m_edid.eisaId << "/" << m_edid.monitorName << "/" << m_edid.serialNumber << " from " << physicalSize << "to " << overwriteSize;
physicalSize = overwriteSize;
}
m_waylandOutput->setPhysicalSize(physicalSize);
// read in mode information
for (int i = 0; i < connector->count_modes; ++i) {
auto *m = &connector->modes[i];
KWayland::Server::OutputInterface::ModeFlags flags;
if (isCurrentMode(m)) {
flags |= KWayland::Server::OutputInterface::ModeFlag::Current;
}
if (m->type & DRM_MODE_TYPE_PREFERRED) {
flags |= KWayland::Server::OutputInterface::ModeFlag::Preferred;
}
// Calculate higher precision (mHz) refresh rate
// logic based on Weston, see compositor-drm.c
quint64 refreshRate = (m->clock * 1000000LL / m->htotal + m->vtotal / 2) / m->vtotal;
if (m->flags & DRM_MODE_FLAG_INTERLACE) {
refreshRate *= 2;
}
if (m->flags & DRM_MODE_FLAG_DBLSCAN) {
refreshRate /= 2;
}
if (m->vscan > 1) {
refreshRate /= m->vscan;
}
m_waylandOutput->addMode(QSize(m->hdisplay, m->vdisplay), flags, refreshRate);
}
// set dpms
if (!m_dpms.isNull()) {
m_waylandOutput->setDpmsSupported(true);
m_waylandOutput->setDpmsMode(toWaylandDpmsMode(m_dpmsMode));
connect(m_waylandOutput.data(), &KWayland::Server::OutputInterface::dpmsModeRequested, this,
[this] (KWayland::Server::OutputInterface::DpmsMode mode) {
setDpms(fromWaylandDpmsMode(mode));
}, Qt::QueuedConnection
);
}
m_waylandOutput->create();
}
void DrmOutput::initUuid()
{
QCryptographicHash hash(QCryptographicHash::Md5);
hash.addData(QByteArray::number(m_connector));
hash.addData(m_edid.eisaId);
hash.addData(m_edid.monitorName);
hash.addData(m_edid.serialNumber);
m_uuid = hash.result().toHex().left(10);
}
bool DrmOutput::isCurrentMode(const drmModeModeInfo *mode) const
{
return mode->clock == m_mode.clock
&& mode->hdisplay == m_mode.hdisplay
&& mode->hsync_start == m_mode.hsync_start
&& mode->hsync_end == m_mode.hsync_end
&& mode->htotal == m_mode.htotal
&& mode->hskew == m_mode.hskew
&& mode->vdisplay == m_mode.vdisplay
&& mode->vsync_start == m_mode.vsync_start
&& mode->vsync_end == m_mode.vsync_end
&& mode->vtotal == m_mode.vtotal
&& mode->vscan == m_mode.vscan
&& mode->vrefresh == m_mode.vrefresh
&& mode->flags == m_mode.flags
&& mode->type == m_mode.type
&& qstrcmp(mode->name, m_mode.name) == 0;
}
void DrmOutput::blank()
{
if (!m_blackBuffer) {
m_blackBuffer = m_backend->createBuffer(size());
m_blackBuffer->map();
m_blackBuffer->image()->fill(Qt::black);
}
setMode(m_blackBuffer);
}
bool DrmOutput::setMode(DrmBuffer *buffer)
{
if (drmModeSetCrtc(m_backend->fd(), m_crtcId, buffer->bufferId(), 0, 0, &m_connector, 1, &m_mode) == 0) {
m_lastStride = buffer->stride();
m_lastGbm = buffer->isGbm();
return true;
} else {
qCWarning(KWIN_DRM) << "Mode setting failed";
return false;
}
}
static bool verifyEdidHeader(drmModePropertyBlobPtr edid)
{
const uint8_t *data = reinterpret_cast<uint8_t*>(edid->data);
if (data[0] != 0x00) {
return false;
}
for (int i = 1; i < 7; ++i) {
if (data[i] != 0xFF) {
return false;
}
}
if (data[7] != 0x00) {
return false;
}
return true;
}
static QByteArray extractEisaId(drmModePropertyBlobPtr edid)
{
/*
* From EDID standard section 3.4:
* The ID Manufacturer Name field, shown in Table 3.5, contains a 2-byte representation of the monitor's
* manufacturer. This is the same as the EISA ID. It is based on compressed ASCII, “0001=A” ... “11010=Z”.
*
* The table:
* | Byte | Bit |
* | | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
* ----------------------------------------
* | 1 | 0)| (4| 3 | 2 | 1 | 0)| (4| 3 |
* | | * | Character 1 | Char 2|
* ----------------------------------------
* | 2 | 2 | 1 | 0)| (4| 3 | 2 | 1 | 0)|
* | | Character2| Character 3 |
* ----------------------------------------
**/
const uint8_t *data = reinterpret_cast<uint8_t*>(edid->data);
static const uint offset = 0x8;
char id[4];
if (data[offset] >> 7) {
// bit at position 7 is not a 0
return QByteArray();
}
// shift two bits to right, and with 7 right most bits
id[0] = 'A' + ((data[offset] >> 2) & 0x1f) -1;
// for first byte: take last two bits and shift them 3 to left (000xx000)
// for second byte: shift 5 bits to right and take 3 right most bits (00000xxx)
// or both together
id[1] = 'A' + (((data[offset] & 0x3) << 3) | ((data[offset + 1] >> 5) & 0x7)) - 1;
// take five right most bits
id[2] = 'A' + (data[offset + 1] & 0x1f) - 1;
id[3] = '\0';
return QByteArray(id);
}
static void extractMonitorDescriptorDescription(drmModePropertyBlobPtr blob, DrmOutput::Edid &edid)
{
// see section 3.10.3
const uint8_t *data = reinterpret_cast<uint8_t*>(blob->data);
static const uint offset = 0x36;
static const uint blockLength = 18;
for (int i = 0; i < 5; ++i) {
const uint co = offset + i * blockLength;
// Flag = 0000h when block used as descriptor
if (data[co] != 0) {
continue;
}
if (data[co + 1] != 0) {
continue;
}
// Reserved = 00h when block used as descriptor
if (data[co + 2] != 0) {
continue;
}
/*
* FFh: Monitor Serial Number - Stored as ASCII, code page # 437, ≤ 13 bytes.
* FEh: ASCII String - Stored as ASCII, code page # 437, ≤ 13 bytes.
* FDh: Monitor range limits, binary coded
* FCh: Monitor name, stored as ASCII, code page # 437
* FBh: Descriptor contains additional color point data
* FAh: Descriptor contains additional Standard Timing Identifications
* F9h - 11h: Currently undefined
* 10h: Dummy descriptor, used to indicate that the descriptor space is unused
* 0Fh - 00h: Descriptor defined by manufacturer.
*/
if (data[co + 3] == 0xfc && edid.monitorName.isEmpty()) {
edid.monitorName = QByteArray((const char *)(&data[co + 5]), 12).trimmed();
}
if (data[co + 3] == 0xfe) {
const QByteArray id = QByteArray((const char *)(&data[co + 5]), 12).trimmed();
if (!id.isEmpty()) {
edid.eisaId = id;
}
}
if (data[co + 3] == 0xff) {
edid.serialNumber = QByteArray((const char *)(&data[co + 5]), 12).trimmed();
}
}
}
static QByteArray extractSerialNumber(drmModePropertyBlobPtr edid)
{
// see section 3.4
const uint8_t *data = reinterpret_cast<uint8_t*>(edid->data);
static const uint offset = 0x0C;
/*
* The ID serial number is a 32-bit serial number used to differentiate between individual instances of the same model
* of monitor. Its use is optional. When used, the bit order for this field follows that shown in Table 3.6. The EDID
* structure Version 1 Revision 1 and later offer a way to represent the serial number of the monitor as an ASCII string
* in a separate descriptor block.
*/
uint32_t serialNumber = 0;
serialNumber = (uint32_t) data[offset + 0];
serialNumber |= (uint32_t) data[offset + 1] << 8;
serialNumber |= (uint32_t) data[offset + 2] << 16;
serialNumber |= (uint32_t) data[offset + 3] << 24;
if (serialNumber == 0) {
return QByteArray();
}
return QByteArray::number(serialNumber);
}
static QSize extractPhysicalSize(drmModePropertyBlobPtr edid)
{
const uint8_t *data = reinterpret_cast<uint8_t*>(edid->data);
return QSize(data[0x15], data[0x16]) * 10;
}
void DrmOutput::initEdid(drmModeConnector *connector)
{
ScopedDrmPointer<_drmModePropertyBlob, &drmModeFreePropertyBlob> edid;
for (int i = 0; i < connector->count_props; ++i) {
ScopedDrmPointer<_drmModeProperty, &drmModeFreeProperty> property(drmModeGetProperty(m_backend->fd(), connector->props[i]));
if (!property) {
continue;
}
if ((property->flags & DRM_MODE_PROP_BLOB) && qstrcmp(property->name, "EDID") == 0) {
edid.reset(drmModeGetPropertyBlob(m_backend->fd(), connector->prop_values[i]));
}
}
if (!edid) {
return;
}
// for documentation see: http://read.pudn.com/downloads110/ebook/456020/E-EDID%20Standard.pdf
if (edid->length < 128) {
return;
}
if (!verifyEdidHeader(edid.data())) {
return;
}
m_edid.eisaId = extractEisaId(edid.data());
m_edid.serialNumber = extractSerialNumber(edid.data());
// parse monitor descriptor description
extractMonitorDescriptorDescription(edid.data(), m_edid);
m_edid.physicalSize = extractPhysicalSize(edid.data());
}
void DrmOutput::initDpms(drmModeConnector *connector)
{
for (int i = 0; i < connector->count_props; ++i) {
ScopedDrmPointer<_drmModeProperty, &drmModeFreeProperty> property(drmModeGetProperty(m_backend->fd(), connector->props[i]));
if (!property) {
continue;
}
if (qstrcmp(property->name, "DPMS") == 0) {
m_dpms.swap(property);
break;
}
}
}
void DrmOutput::setDpms(DrmOutput::DpmsMode mode)
{
if (m_dpms.isNull()) {
return;
}
if (mode == m_dpmsMode) {
return;
}
if (drmModeConnectorSetProperty(m_backend->fd(), m_connector, m_dpms->prop_id, uint64_t(mode)) != 0) {
qCWarning(KWIN_DRM) << "Setting DPMS failed";
return;
}
m_dpmsMode = mode;
if (m_waylandOutput) {
m_waylandOutput->setDpmsMode(toWaylandDpmsMode(m_dpmsMode));
}
emit dpmsChanged();
if (m_dpmsMode != DpmsMode::On) {
m_backend->outputWentOff();
} else {
m_backend->checkOutputsAreOn();
blank();
if (Compositor *compositor = Compositor::self()) {
compositor->addRepaintFull();
}
}
}
QString DrmOutput::name() const
{
if (!m_waylandOutput) {
return i18n("unknown");
}
return QStringLiteral("%1 %2").arg(m_waylandOutput->manufacturer()).arg(m_waylandOutput->model());
}
int DrmOutput::currentRefreshRate() const
{
if (!m_waylandOutput) {
return 60000;
}
return m_waylandOutput->refreshRate();
}
void DrmOutput::setGlobalPos(const QPoint &pos)
{
m_globalPos = pos;
if (m_waylandOutput) {
m_waylandOutput->setGlobalPosition(pos);
}
}
DrmBuffer::DrmBuffer(DrmBackend *backend, const QSize &size)
: m_backend(backend)
, m_size(size)
{
drm_mode_create_dumb createArgs;
memset(&createArgs, 0, sizeof createArgs);
createArgs.bpp = 32;
createArgs.width = size.width();
createArgs.height = size.height();
if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_CREATE_DUMB, &createArgs) != 0) {
return;
}
m_handle = createArgs.handle;
m_bufferSize = createArgs.size;
m_stride = createArgs.pitch;
drmModeAddFB(m_backend->fd(), size.width(), size.height(), 24, 32,
m_stride, createArgs.handle, &m_bufferId);
}
#if HAVE_GBM
static void gbmCallback(gbm_bo *bo, void *data)
{
DrmBackend *backend = reinterpret_cast<DrmBackend*>(data);
const auto &buffers = backend->buffers();
for (auto buffer: buffers) {
if (buffer->gbm() == bo) {
delete buffer;
return;
}
}
}
#endif
DrmBuffer::DrmBuffer(DrmBackend *backend, gbm_surface *surface)
: m_backend(backend)
, m_surface(surface)
{
#if HAVE_GBM
m_bo = gbm_surface_lock_front_buffer(surface);
if (!m_bo) {
qCWarning(KWIN_DRM) << "Locking front buffer failed";
return;
}
m_size = QSize(gbm_bo_get_width(m_bo), gbm_bo_get_height(m_bo));
m_stride = gbm_bo_get_stride(m_bo);
if (drmModeAddFB(m_backend->fd(), m_size.width(), m_size.height(), 24, 32, m_stride, gbm_bo_get_handle(m_bo).u32, &m_bufferId) != 0) {
qCWarning(KWIN_DRM) << "drmModeAddFB failed";
}
gbm_bo_set_user_data(m_bo, m_backend, gbmCallback);
#endif
}
DrmBuffer::~DrmBuffer()
{
m_backend->bufferDestroyed(this);
delete m_image;
if (m_memory) {
munmap(m_memory, m_bufferSize);
}
if (m_bufferId) {
drmModeRmFB(m_backend->fd(), m_bufferId);
}
if (m_handle) {
drm_mode_destroy_dumb destroyArgs;
destroyArgs.handle = m_handle;
drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_DESTROY_DUMB, &destroyArgs);
}
releaseGbm();
}
bool DrmBuffer::map(QImage::Format format)
{
if (!m_handle || !m_bufferId) {
return false;
}
drm_mode_map_dumb mapArgs;
memset(&mapArgs, 0, sizeof mapArgs);
mapArgs.handle = m_handle;
if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_MAP_DUMB, &mapArgs) != 0) {
return false;
}
void *address = mmap(nullptr, m_bufferSize, PROT_WRITE, MAP_SHARED, m_backend->fd(), mapArgs.offset);
if (address == MAP_FAILED) {
return false;
}
m_memory = address;
m_image = new QImage((uchar*)m_memory, m_size.width(), m_size.height(), m_stride, format);
return !m_image->isNull();
}
void DrmBuffer::releaseGbm()
{
#if HAVE_GBM
if (m_bo) {
gbm_surface_release_buffer(m_surface, m_bo);
m_bo = nullptr;
}
#endif
}
}
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