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kwin/plugins/platforms/drm/drm_output.cpp
Vlad Zahorodnii b8a70e62d5 Introduce RenderLoop 
At the moment, our frame scheduling infrastructure is still heavily
based on Xinerama-style rendering. Specifically, we assume that painting
is driven by a single timer, etc.

This change introduces a new type - RenderLoop. Its main purpose is to
drive compositing on a specific output, or in case of X11, on the
overlay window.

With RenderLoop, compositing is synchronized to vblank events. It
exposes the last and the next estimated presentation timestamp. The
expected presentation timestamp can be used by effects to ensure that
animations are synchronized with the upcoming vblank event.

On Wayland, every outputs has its own render loop. On X11, per screen
rendering is not possible, therefore the platform exposes the render
loop for the overlay window. Ideally, the Scene has to expose the
RenderLoop, but as the first step towards better compositing scheduling
it's good as is for the time being.

The RenderLoop tries to minimize the latency by delaying compositing as
close as possible to the next vblank event. One tricky thing about it is
that if compositing is too close to the next vblank event, animations
may become a little bit choppy. However, increasing the latency reduces
the choppiness.

Given that, there is no any "silver bullet" solution for the choppiness
issue, a new option has been added in the Compositing KCM to specify the
amount of latency. By default, it's "Medium," but if a user is not
satisfied with the upstream default, they can tweak it.
2021-01-06 16:59:29 +00:00

1077 lines
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/*
KWin - the KDE window manager
This file is part of the KDE project.
SPDX-FileCopyrightText: 2015 Martin Gräßlin <mgraesslin@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "drm_output.h"
#include "drm_backend.h"
#include "drm_object_crtc.h"
#include "drm_object_connector.h"
#include "composite.h"
#include "cursor.h"
#include "logind.h"
#include "logging.h"
#include "main.h"
#include "screens.h"
#include "renderloop.h"
#include "wayland_server.h"
// KWayland
#include <KWaylandServer/output_interface.h>
// KF5
#include <KConfigGroup>
#include <KLocalizedString>
#include <KSharedConfig>
// Qt
#include <QMatrix4x4>
#include <QCryptographicHash>
#include <QPainter>
// c++
#include <cerrno>
// drm
#include <xf86drm.h>
#include <libdrm/drm_mode.h>
#include "drm_gpu.h"
namespace KWin
{
DrmOutput::DrmOutput(DrmBackend *backend, DrmGpu *gpu)
: AbstractWaylandOutput(backend)
, m_backend(backend)
, m_gpu(gpu)
, m_renderLoop(new RenderLoop(this))
{
}
DrmOutput::~DrmOutput()
{
Q_ASSERT(!m_pageFlipPending);
teardown();
}
RenderLoop *DrmOutput::renderLoop() const
{
return m_renderLoop;
}
void DrmOutput::teardown()
{
if (m_deleted) {
return;
}
m_deleted = true;
hideCursor();
m_crtc->blank();
if (m_primaryPlane) {
// TODO: when having multiple planes, also clean up these
m_primaryPlane->setOutput(nullptr);
if (m_gpu->deleteBufferAfterPageFlip()) {
delete m_primaryPlane->current();
}
m_primaryPlane->setCurrent(nullptr);
}
if (m_cursorPlane) {
m_cursorPlane->setOutput(nullptr);
}
m_crtc->setOutput(nullptr);
m_conn->setOutput(nullptr);
m_cursor[0].reset(nullptr);
m_cursor[1].reset(nullptr);
if (!m_pageFlipPending) {
deleteLater();
} //else will be deleted in the page flip handler
//this is needed so that the pageflipcallback handle isn't deleted
}
void DrmOutput::releaseGbm()
{
if (DrmBuffer *b = m_crtc->current()) {
b->releaseGbm();
}
if (m_primaryPlane && m_primaryPlane->current()) {
m_primaryPlane->current()->releaseGbm();
}
}
bool DrmOutput::hideCursor()
{
return drmModeSetCursor(m_gpu->fd(), m_crtc->id(), 0, 0, 0) == 0;
}
bool DrmOutput::showCursor(DrmDumbBuffer *c)
{
const QSize &s = c->size();
return drmModeSetCursor(m_gpu->fd(), m_crtc->id(), c->handle(), s.width(), s.height()) == 0;
}
bool DrmOutput::showCursor()
{
if (m_deleted) {
return false;
}
const bool ret = showCursor(m_cursor[m_cursorIndex].data());
if (!ret) {
qCDebug(KWIN_DRM) << "DrmOutput::showCursor(DrmDumbBuffer) failed";
return ret;
}
if (m_hasNewCursor) {
m_cursorIndex = (m_cursorIndex + 1) % 2;
m_hasNewCursor = false;
}
return ret;
}
static bool isCursorSpriteCompatible(const QImage *buffer, const QImage *sprite)
{
// Note that we need compare the rects in the device independent pixels because the
// buffer and the cursor sprite image may have different scale factors.
const QRect bufferRect(QPoint(0, 0), buffer->size() / buffer->devicePixelRatio());
const QRect spriteRect(QPoint(0, 0), sprite->size() / sprite->devicePixelRatio());
return bufferRect.contains(spriteRect);
}
bool DrmOutput::updateCursor()
{
if (m_deleted) {
return false;
}
const Cursor *cursor = Cursors::self()->currentCursor();
const QImage cursorImage = cursor->image();
if (cursorImage.isNull()) {
return false;
}
QImage *c = m_cursor[m_cursorIndex]->image();
c->setDevicePixelRatio(scale());
if (!isCursorSpriteCompatible(c, &cursorImage)) {
// If the cursor image is too big, fall back to rendering the software cursor.
return false;
}
m_hasNewCursor = true;
c->fill(Qt::transparent);
QPainter p;
p.begin(c);
p.setWorldTransform(logicalToNativeMatrix(cursor->rect(), 1, transform()).toTransform());
p.drawImage(QPoint(0, 0), cursorImage);
p.end();
return true;
}
void DrmOutput::moveCursor()
{
Cursor *cursor = Cursors::self()->currentCursor();
const QMatrix4x4 hotspotMatrix = logicalToNativeMatrix(cursor->rect(), scale(), transform());
const QMatrix4x4 monitorMatrix = logicalToNativeMatrix(geometry(), scale(), transform());
QPoint pos = monitorMatrix.map(cursor->pos());
pos -= hotspotMatrix.map(cursor->hotspot());
drmModeMoveCursor(m_gpu->fd(), m_crtc->id(), pos.x(), pos.y());
}
static QHash<int, QByteArray> s_connectorNames = {
{DRM_MODE_CONNECTOR_Unknown, QByteArrayLiteral("Unknown")},
{DRM_MODE_CONNECTOR_VGA, QByteArrayLiteral("VGA")},
{DRM_MODE_CONNECTOR_DVII, QByteArrayLiteral("DVI-I")},
{DRM_MODE_CONNECTOR_DVID, QByteArrayLiteral("DVI-D")},
{DRM_MODE_CONNECTOR_DVIA, QByteArrayLiteral("DVI-A")},
{DRM_MODE_CONNECTOR_Composite, QByteArrayLiteral("Composite")},
{DRM_MODE_CONNECTOR_SVIDEO, QByteArrayLiteral("SVIDEO")},
{DRM_MODE_CONNECTOR_LVDS, QByteArrayLiteral("LVDS")},
{DRM_MODE_CONNECTOR_Component, QByteArrayLiteral("Component")},
{DRM_MODE_CONNECTOR_9PinDIN, QByteArrayLiteral("DIN")},
{DRM_MODE_CONNECTOR_DisplayPort, QByteArrayLiteral("DP")},
{DRM_MODE_CONNECTOR_HDMIA, QByteArrayLiteral("HDMI-A")},
{DRM_MODE_CONNECTOR_HDMIB, QByteArrayLiteral("HDMI-B")},
{DRM_MODE_CONNECTOR_TV, QByteArrayLiteral("TV")},
{DRM_MODE_CONNECTOR_eDP, QByteArrayLiteral("eDP")},
{DRM_MODE_CONNECTOR_VIRTUAL, QByteArrayLiteral("Virtual")},
{DRM_MODE_CONNECTOR_DSI, QByteArrayLiteral("DSI")},
#ifdef DRM_MODE_CONNECTOR_DPI
{DRM_MODE_CONNECTOR_DPI, QByteArrayLiteral("DPI")},
#endif
};
namespace {
quint64 refreshRateForMode(_drmModeModeInfo *m)
{
// 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;
}
return refreshRate;
}
}
bool DrmOutput::init(drmModeConnector *connector)
{
initEdid(connector);
initDpms(connector);
initUuid();
if (m_gpu->atomicModeSetting()) {
if (!initPrimaryPlane()) {
return false;
}
}
setInternal(connector->connector_type == DRM_MODE_CONNECTOR_LVDS || connector->connector_type == DRM_MODE_CONNECTOR_eDP
|| connector->connector_type == DRM_MODE_CONNECTOR_DSI);
setDpmsSupported(true);
initOutputDevice(connector);
if (!m_gpu->atomicModeSetting() && !m_crtc->blank()) {
// We use legacy mode and the initial output blank failed.
return false;
}
updateDpms(KWaylandServer::OutputInterface::DpmsMode::On);
return true;
}
void DrmOutput::initUuid()
{
QCryptographicHash hash(QCryptographicHash::Md5);
hash.addData(QByteArray::number(m_conn->id()));
hash.addData(m_edid.eisaId());
hash.addData(m_edid.monitorName());
hash.addData(m_edid.serialNumber());
m_uuid = hash.result().toHex().left(10);
}
void DrmOutput::initOutputDevice(drmModeConnector *connector)
{
QString manufacturer;
if (!m_edid.vendor().isEmpty()) {
manufacturer = QString::fromLatin1(m_edid.vendor());
} else if (!m_edid.eisaId().isEmpty()) {
manufacturer = QString::fromLatin1(m_edid.eisaId());
}
QString connectorName = s_connectorNames.value(connector->connector_type, QByteArrayLiteral("Unknown")) + QStringLiteral("-") + QString::number(connector->connector_type_id);
QString modelName;
if (!m_edid.monitorName().isEmpty()) {
QString m = QString::fromLatin1(m_edid.monitorName());
if (!m_edid.serialNumber().isEmpty()) {
m.append('/');
m.append(QString::fromLatin1(m_edid.serialNumber()));
}
modelName = m;
} else if (!m_edid.serialNumber().isEmpty()) {
modelName = QString::fromLatin1(m_edid.serialNumber());
} else {
modelName = i18n("unknown");
}
const QString model = connectorName + QStringLiteral("-") + modelName;
// read in mode information
QVector<KWaylandServer::OutputDeviceInterface::Mode> modes;
for (int i = 0; i < connector->count_modes; ++i) {
// TODO: in AMS here we could read and store for later every mode's blob_id
// would simplify isCurrentMode(..) and presentAtomically(..) in case of mode set
auto *m = &connector->modes[i];
KWaylandServer::OutputDeviceInterface::ModeFlags deviceflags;
if (isCurrentMode(m)) {
deviceflags |= KWaylandServer::OutputDeviceInterface::ModeFlag::Current;
}
if (m->type & DRM_MODE_TYPE_PREFERRED) {
deviceflags |= KWaylandServer::OutputDeviceInterface::ModeFlag::Preferred;
}
KWaylandServer::OutputDeviceInterface::Mode mode;
mode.id = i;
mode.size = QSize(m->hdisplay, m->vdisplay);
mode.flags = deviceflags;
mode.refreshRate = refreshRateForMode(m);
modes << mode;
}
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("unknown");
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;
}
setName(connectorName);
initInterfaces(model, manufacturer, m_uuid, physicalSize, modes, m_edid.raw());
}
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::initEdid(drmModeConnector *connector)
{
DrmScopedPointer<drmModePropertyBlobRes> edid;
for (int i = 0; i < connector->count_props; ++i) {
DrmScopedPointer<drmModePropertyRes> property(drmModeGetProperty(m_gpu->fd(), connector->props[i]));
if (!property) {
continue;
}
if ((property->flags & DRM_MODE_PROP_BLOB) && qstrcmp(property->name, "EDID") == 0) {
edid.reset(drmModeGetPropertyBlob(m_gpu->fd(), connector->prop_values[i]));
}
}
if (!edid) {
qCWarning(KWIN_DRM) << "Could not find edid for connector" << connector << connector->connector_id;
return;
}
m_edid = Edid(edid->data, edid->length);
if (!m_edid.isValid()) {
qCWarning(KWIN_DRM, "Couldn't parse EDID for connector with id %d", m_conn->id());
}
}
bool DrmOutput::initPrimaryPlane()
{
for (int i = 0; i < m_gpu->planes().size(); ++i) {
DrmPlane *p = m_gpu->planes()[i];
if (!p) {
continue;
}
if (p->type() != DrmPlane::TypeIndex::Primary) {
continue;
}
if (p->output()) { // Plane already has an output
continue;
}
if (m_primaryPlane) { // Output already has a primary plane
continue;
}
if (!p->isCrtcSupported(m_crtc->resIndex())) {
continue;
}
p->setOutput(this);
m_primaryPlane = p;
qCDebug(KWIN_DRM) << "Initialized primary plane" << p->id() << "on CRTC" << m_crtc->id();
return true;
}
qCCritical(KWIN_DRM) << "Failed to initialize primary plane.";
return false;
}
bool DrmOutput::initCursorPlane() // TODO: Add call in init (but needs layer support in general first)
{
for (int i = 0; i < m_gpu->planes().size(); ++i) {
DrmPlane *p = m_gpu->planes()[i];
if (!p) {
continue;
}
if (p->type() != DrmPlane::TypeIndex::Cursor) {
continue;
}
if (p->output()) { // Plane already has an output
continue;
}
if (m_cursorPlane) { // Output already has a cursor plane
continue;
}
if (!p->isCrtcSupported(m_crtc->resIndex())) {
continue;
}
p->setOutput(this);
m_cursorPlane = p;
qCDebug(KWIN_DRM) << "Initialized cursor plane" << p->id() << "on CRTC" << m_crtc->id();
return true;
}
return false;
}
bool DrmOutput::initCursor(const QSize &cursorSize)
{
auto createCursor = [this, cursorSize] (int index) {
m_cursor[index].reset(m_gpu->createBuffer(cursorSize));
if (!m_cursor[index]->map(QImage::Format_ARGB32_Premultiplied)) {
return false;
}
return true;
};
if (!createCursor(0) || !createCursor(1)) {
return false;
}
return true;
}
void DrmOutput::initDpms(drmModeConnector *connector)
{
for (int i = 0; i < connector->count_props; ++i) {
DrmScopedPointer<drmModePropertyRes> property(drmModeGetProperty(m_gpu->fd(), connector->props[i]));
if (!property) {
continue;
}
if (qstrcmp(property->name, "DPMS") == 0) {
m_dpms.swap(property);
break;
}
}
}
void DrmOutput::updateEnablement(bool enable)
{
if (enable) {
m_dpmsModePending = DpmsMode::On;
if (m_gpu->atomicModeSetting()) {
atomicEnable();
} else {
if (dpmsLegacyApply()) {
m_backend->enableOutput(this, true);
}
}
} else {
m_dpmsModePending = DpmsMode::Off;
if (m_gpu->atomicModeSetting()) {
atomicDisable();
} else {
if (dpmsLegacyApply()) {
m_backend->enableOutput(this, false);
}
}
}
}
void DrmOutput::atomicEnable()
{
m_modesetRequested = true;
if (m_atomicOffPending) {
Q_ASSERT(m_pageFlipPending);
m_atomicOffPending = false;
}
m_backend->enableOutput(this, true);
if (Compositor *compositor = Compositor::self()) {
compositor->addRepaintFull();
}
}
void DrmOutput::atomicDisable()
{
m_modesetRequested = true;
m_backend->enableOutput(this, false);
m_atomicOffPending = true;
if (!m_pageFlipPending) {
dpmsAtomicOff();
}
}
static DrmOutput::DpmsMode fromWaylandDpmsMode(KWaylandServer::OutputInterface::DpmsMode wlMode)
{
using namespace KWaylandServer;
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();
}
}
static KWaylandServer::OutputInterface::DpmsMode toWaylandDpmsMode(DrmOutput::DpmsMode mode)
{
using namespace KWaylandServer;
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();
}
}
void DrmOutput::updateDpms(KWaylandServer::OutputInterface::DpmsMode mode)
{
if (m_dpms.isNull() || !isEnabled()) {
return;
}
const auto drmMode = fromWaylandDpmsMode(mode);
if (drmMode == m_dpmsModePending) {
qCDebug(KWIN_DRM) << "New DPMS mode equals old mode. DPMS unchanged.";
waylandOutput()->setDpmsMode(mode);
return;
}
m_dpmsModePending = drmMode;
if (m_gpu->atomicModeSetting()) {
m_modesetRequested = true;
if (drmMode == DpmsMode::On) {
if (m_atomicOffPending) {
Q_ASSERT(m_pageFlipPending);
m_atomicOffPending = false;
}
dpmsFinishOn();
} else {
m_atomicOffPending = true;
if (!m_pageFlipPending) {
dpmsAtomicOff();
}
}
} else {
dpmsLegacyApply();
}
}
void DrmOutput::dpmsFinishOn()
{
qCDebug(KWIN_DRM) << "DPMS mode set for output" << m_crtc->id() << "to On.";
waylandOutput()->setDpmsMode(toWaylandDpmsMode(DpmsMode::On));
m_backend->checkOutputsAreOn();
if (!m_gpu->atomicModeSetting()) {
m_crtc->blank();
}
if (Compositor *compositor = Compositor::self()) {
compositor->addRepaintFull();
}
}
void DrmOutput::dpmsFinishOff()
{
qCDebug(KWIN_DRM) << "DPMS mode set for output" << m_crtc->id() << "to Off.";
if (isEnabled()) {
waylandOutput()->setDpmsMode(toWaylandDpmsMode(m_dpmsModePending));
m_backend->createDpmsFilter();
} else {
waylandOutput()->setDpmsMode(toWaylandDpmsMode(DpmsMode::Off));
}
}
bool DrmOutput::dpmsLegacyApply()
{
if (drmModeConnectorSetProperty(m_gpu->fd(), m_conn->id(),
m_dpms->prop_id, uint64_t(m_dpmsModePending)) < 0) {
m_dpmsModePending = m_dpmsMode;
qCWarning(KWIN_DRM) << "Setting DPMS failed";
return false;
}
if (m_dpmsModePending == DpmsMode::On) {
dpmsFinishOn();
} else {
dpmsFinishOff();
}
m_dpmsMode = m_dpmsModePending;
return true;
}
DrmPlane::Transformations outputToPlaneTransform(DrmOutput::Transform transform)
{
using OutTrans = DrmOutput::Transform;
using PlaneTrans = DrmPlane::Transformation;
// TODO: Do we want to support reflections (flips)?
switch (transform) {
case OutTrans::Normal:
case OutTrans::Flipped:
return PlaneTrans::Rotate0;
case OutTrans::Rotated90:
case OutTrans::Flipped90:
return PlaneTrans::Rotate90;
case OutTrans::Rotated180:
case OutTrans::Flipped180:
return PlaneTrans::Rotate180;
case OutTrans::Rotated270:
case OutTrans::Flipped270:
return PlaneTrans::Rotate270;
default:
Q_UNREACHABLE();
}
}
bool DrmOutput::hardwareTransforms() const
{
if (!m_primaryPlane) {
return false;
}
return m_primaryPlane->transformation() == outputToPlaneTransform(transform());
}
void DrmOutput::updateTransform(Transform transform)
{
const auto planeTransform = outputToPlaneTransform(transform);
if (m_primaryPlane) {
// At the moment we have to exclude hardware transforms for vertical buffers.
// For that we need to support other buffers and graceful fallback from atomic tests.
// Reason is that standard linear buffers are not suitable.
const bool isPortrait = transform == Transform::Rotated90
|| transform == Transform::Flipped90
|| transform == Transform::Rotated270
|| transform == Transform::Flipped270;
if (!qEnvironmentVariableIsSet("KWIN_DRM_SW_ROTATIONS_ONLY") &&
(m_primaryPlane->supportedTransformations() & planeTransform) &&
!isPortrait) {
m_primaryPlane->setTransformation(planeTransform);
} else {
m_primaryPlane->setTransformation(DrmPlane::Transformation::Rotate0);
}
}
m_modesetRequested = true;
// show cursor only if is enabled, i.e if pointer device is presentP
if (!m_backend->isCursorHidden() && !m_backend->usesSoftwareCursor()) {
// the cursor might need to get rotated
updateCursor();
showCursor();
}
}
void DrmOutput::updateMode(uint32_t width, uint32_t height, uint32_t refreshRate)
{
if (m_mode.hdisplay == width && m_mode.vdisplay == height && m_mode.vrefresh == refreshRate) {
return;
}
// try to find a fitting mode
DrmScopedPointer<drmModeConnector> connector(drmModeGetConnectorCurrent(m_gpu->fd(), m_conn->id()));
for (int i = 0; i < connector->count_modes; i++) {
auto mode = connector->modes[i];
if (mode.hdisplay == width && mode.vdisplay == height && mode.vrefresh == refreshRate) {
updateMode(i);
return;
}
}
qCWarning(KWIN_DRM, "Could not find a fitting mode with size=%dx%d and refresh rate %d for output %s",
width, height, refreshRate, uuid().constData());
}
void DrmOutput::updateMode(int modeIndex)
{
// get all modes on the connector
DrmScopedPointer<drmModeConnector> connector(drmModeGetConnector(m_gpu->fd(), m_conn->id()));
if (connector->count_modes <= modeIndex) {
// TODO: error?
return;
}
if (isCurrentMode(&connector->modes[modeIndex])) {
// nothing to do
return;
}
m_mode = connector->modes[modeIndex];
m_modesetRequested = true;
setWaylandMode();
}
void DrmOutput::setWaylandMode()
{
AbstractWaylandOutput::setWaylandMode(QSize(m_mode.hdisplay, m_mode.vdisplay),
refreshRateForMode(&m_mode));
}
void DrmOutput::pageFlipped()
{
// In legacy mode we might get a page flip through a blank.
Q_ASSERT(m_pageFlipPending || !m_gpu->atomicModeSetting());
m_pageFlipPending = false;
if (m_deleted) {
deleteLater();
return;
}
if (!m_crtc) {
return;
}
// Egl based surface buffers get destroyed, QPainter based dumb buffers not
// TODO: split up DrmOutput in two for dumb and egl/gbm surface buffer compatible subclasses completely?
if (m_gpu->deleteBufferAfterPageFlip()) {
if (m_gpu->atomicModeSetting()) {
if (!m_primaryPlane->next()) {
// on manual vt switch
// TODO: when we later use overlay planes it might happen, that we have a page flip with only
// damage on one of these, and therefore the primary plane has no next buffer
// -> Then we don't want to return here!
if (m_primaryPlane->current()) {
m_primaryPlane->current()->releaseGbm();
}
return;
}
for (DrmPlane *p : m_nextPlanesFlipList) {
p->flipBufferWithDelete();
}
m_nextPlanesFlipList.clear();
} else {
if (!m_crtc->next()) {
// on manual vt switch
if (DrmBuffer *b = m_crtc->current()) {
b->releaseGbm();
}
}
m_crtc->flipBuffer();
}
} else {
if (m_gpu->atomicModeSetting()){
for (DrmPlane *p : m_nextPlanesFlipList) {
p->flipBuffer();
}
m_nextPlanesFlipList.clear();
} else {
m_crtc->flipBuffer();
}
m_crtc->flipBuffer();
}
if (m_atomicOffPending) {
dpmsAtomicOff();
}
}
bool DrmOutput::present(DrmBuffer *buffer)
{
if (m_dpmsModePending != DpmsMode::On) {
return false;
}
if (m_gpu->atomicModeSetting()) {
return presentAtomically(buffer);
} else {
return presentLegacy(buffer);
}
}
bool DrmOutput::dpmsAtomicOff()
{
m_atomicOffPending = false;
// TODO: With multiple planes: deactivate all of them here
delete m_primaryPlane->next();
m_primaryPlane->setNext(nullptr);
m_nextPlanesFlipList << m_primaryPlane;
if (!doAtomicCommit(AtomicCommitMode::Test)) {
qCDebug(KWIN_DRM) << "Atomic test commit to Dpms Off failed. Aborting.";
return false;
}
if (!doAtomicCommit(AtomicCommitMode::Real)) {
qCDebug(KWIN_DRM) << "Atomic commit to Dpms Off failed. This should have never happened! Aborting.";
return false;
}
m_nextPlanesFlipList.clear();
dpmsFinishOff();
return true;
}
bool DrmOutput::presentAtomically(DrmBuffer *buffer)
{
if (!LogindIntegration::self()->isActiveSession()) {
qCWarning(KWIN_DRM) << "Logind session not active.";
return false;
}
if (m_pageFlipPending) {
qCWarning(KWIN_DRM) << "Page not yet flipped.";
return false;
}
#if HAVE_EGL_STREAMS
if (m_gpu->useEglStreams() && !m_modesetRequested) {
// EglStreamBackend queues normal page flips through EGL,
// modesets are still performed through DRM-KMS
m_pageFlipPending = true;
return true;
}
#endif
m_primaryPlane->setNext(buffer);
m_nextPlanesFlipList << m_primaryPlane;
if (!doAtomicCommit(AtomicCommitMode::Test)) {
//TODO: When we use planes for layered rendering, fallback to renderer instead. Also for direct scanout?
//TODO: Probably should undo setNext and reset the flip list
qCDebug(KWIN_DRM) << "Atomic test commit failed. Aborting present.";
// go back to previous state
if (m_lastWorkingState.valid) {
m_mode = m_lastWorkingState.mode;
setTransform(m_lastWorkingState.transform);
setGlobalPos(m_lastWorkingState.globalPos);
if (m_primaryPlane) {
m_primaryPlane->setTransformation(m_lastWorkingState.planeTransformations);
}
m_modesetRequested = true;
if (!m_backend->isCursorHidden()) {
// the cursor might need to get rotated
updateCursor();
showCursor();
}
setWaylandMode();
emit screens()->changed();
}
return false;
}
const bool wasModeset = m_modesetRequested;
if (!doAtomicCommit(AtomicCommitMode::Real)) {
qCDebug(KWIN_DRM) << "Atomic commit failed. This should have never happened! Aborting present.";
//TODO: Probably should undo setNext and reset the flip list
return false;
}
if (wasModeset) {
// store current mode set as new good state
m_lastWorkingState.mode = m_mode;
m_lastWorkingState.transform = transform();
m_lastWorkingState.globalPos = globalPos();
if (m_primaryPlane) {
m_lastWorkingState.planeTransformations = m_primaryPlane->transformation();
}
m_lastWorkingState.valid = true;
m_renderLoop->setRefreshRate(refreshRateForMode(&m_mode));
}
m_pageFlipPending = true;
return true;
}
bool DrmOutput::presentLegacy(DrmBuffer *buffer)
{
if (m_crtc->next()) {
return false;
}
if (!LogindIntegration::self()->isActiveSession()) {
m_crtc->setNext(buffer);
return false;
}
// Do we need to set a new mode first?
if (!m_crtc->current() || m_crtc->current()->needsModeChange(buffer)) {
if (!setModeLegacy(buffer)) {
return false;
}
}
const bool ok = drmModePageFlip(m_gpu->fd(), m_crtc->id(), buffer->bufferId(), DRM_MODE_PAGE_FLIP_EVENT, this) == 0;
if (ok) {
m_crtc->setNext(buffer);
} else {
qCWarning(KWIN_DRM) << "Page flip failed:" << strerror(errno);
}
return ok;
}
bool DrmOutput::setModeLegacy(DrmBuffer *buffer)
{
uint32_t connId = m_conn->id();
if (drmModeSetCrtc(m_gpu->fd(), m_crtc->id(), buffer->bufferId(), 0, 0, &connId, 1, &m_mode) == 0) {
return true;
} else {
qCWarning(KWIN_DRM) << "Mode setting failed";
return false;
}
}
bool DrmOutput::doAtomicCommit(AtomicCommitMode mode)
{
drmModeAtomicReq *req = drmModeAtomicAlloc();
auto errorHandler = [this, mode, req] () {
if (mode == AtomicCommitMode::Test) {
// TODO: when we later test overlay planes, make sure we change only the right stuff back
}
if (req) {
drmModeAtomicFree(req);
}
if (m_dpmsMode != m_dpmsModePending) {
qCWarning(KWIN_DRM) << "Setting DPMS failed";
m_dpmsModePending = m_dpmsMode;
if (m_dpmsMode != DpmsMode::On) {
dpmsFinishOff();
}
}
// TODO: see above, rework later for overlay planes!
for (DrmPlane *p : m_nextPlanesFlipList) {
p->setNext(nullptr);
}
m_nextPlanesFlipList.clear();
};
if (!req) {
qCWarning(KWIN_DRM) << "DRM: couldn't allocate atomic request";
errorHandler();
return false;
}
uint32_t flags = 0;
// Do we need to set a new mode?
if (m_modesetRequested) {
if (m_dpmsModePending == DpmsMode::On) {
if (drmModeCreatePropertyBlob(m_gpu->fd(), &m_mode, sizeof(m_mode), &m_blobId) != 0) {
qCWarning(KWIN_DRM) << "Failed to create property blob";
errorHandler();
return false;
}
}
if (!atomicReqModesetPopulate(req, m_dpmsModePending == DpmsMode::On)){
qCWarning(KWIN_DRM) << "Failed to populate Atomic Modeset";
errorHandler();
return false;
}
flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
}
if (mode == AtomicCommitMode::Real) {
if (m_dpmsModePending == DpmsMode::On) {
if (!(flags & DRM_MODE_ATOMIC_ALLOW_MODESET)) {
// TODO: Evaluating this condition should only be necessary, as long as we expect older kernels than 4.10.
flags |= DRM_MODE_ATOMIC_NONBLOCK;
}
#if HAVE_EGL_STREAMS
if (!m_gpu->useEglStreams())
// EglStreamBackend uses the NV_output_drm_flip_event EGL extension
// to register the flip event through eglStreamConsumerAcquireAttribNV
#endif
flags |= DRM_MODE_PAGE_FLIP_EVENT;
}
} else {
flags |= DRM_MODE_ATOMIC_TEST_ONLY;
}
bool ret = true;
// TODO: Make sure when we use more than one plane at a time, that we go through this list in the right order.
for (int i = m_nextPlanesFlipList.size() - 1; 0 <= i; i-- ) {
DrmPlane *p = m_nextPlanesFlipList[i];
ret &= p->atomicPopulate(req);
}
if (!ret) {
qCWarning(KWIN_DRM) << "Failed to populate atomic planes. Abort atomic commit!";
errorHandler();
return false;
}
if (drmModeAtomicCommit(m_gpu->fd(), req, flags, this)) {
qCDebug(KWIN_DRM) << "Atomic request failed to commit: " << strerror(errno);
errorHandler();
return false;
}
if (mode == AtomicCommitMode::Real && (flags & DRM_MODE_ATOMIC_ALLOW_MODESET)) {
qCDebug(KWIN_DRM) << "Atomic Modeset successful.";
m_modesetRequested = false;
m_dpmsMode = m_dpmsModePending;
}
drmModeAtomicFree(req);
return true;
}
bool DrmOutput::atomicReqModesetPopulate(drmModeAtomicReq *req, bool enable)
{
if (enable) {
const QSize mSize = modeSize();
const QSize sourceSize = hardwareTransforms() ? pixelSize() : mSize;
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::SrcX), 0);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::SrcY), 0);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::SrcW), sourceSize.width() << 16);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::SrcH), sourceSize.height() << 16);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::CrtcW), mSize.width());
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::CrtcH), mSize.height());
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::CrtcId), m_crtc->id());
} else {
if (m_gpu->deleteBufferAfterPageFlip()) {
delete m_primaryPlane->current();
delete m_primaryPlane->next();
}
m_primaryPlane->setCurrent(nullptr);
m_primaryPlane->setNext(nullptr);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::SrcX), 0);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::SrcY), 0);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::SrcW), 0);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::SrcH), 0);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::CrtcW), 0);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::CrtcH), 0);
m_primaryPlane->setValue(int(DrmPlane::PropertyIndex::CrtcId), 0);
}
m_conn->setValue(int(DrmConnector::PropertyIndex::CrtcId), enable ? m_crtc->id() : 0);
m_crtc->setValue(int(DrmCrtc::PropertyIndex::ModeId), enable ? m_blobId : 0);
m_crtc->setValue(int(DrmCrtc::PropertyIndex::Active), enable);
bool ret = true;
ret &= m_conn->atomicPopulate(req);
ret &= m_crtc->atomicPopulate(req);
return ret;
}
int DrmOutput::gammaRampSize() const
{
return m_crtc->gammaRampSize();
}
bool DrmOutput::setGammaRamp(const GammaRamp &gamma)
{
return m_crtc->setGammaRamp(gamma);
}
}
QDebug& operator<<(QDebug& s, const KWin::DrmOutput *output)
{
if (!output)
return s.nospace() << "DrmOutput()";
return s.nospace() << "DrmOutput(" << output->name() << ", crtc:" << output->crtc() << ", connector:" << output->connector() << ", geometry:" << output->geometry() << ')';
}
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