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kwin/plugins/platforms/drm/drm_output.cpp
Roman Gilg 997cf97c9f Atomic Mode Setting / Universal Plane preliminary support 
This is Milestone 1 of full support of Atomic Mode Setting (AMS) and
Universal Planes in the KWin DRM backend.

With Milestone 1 we can use the primary plane of a DRM output and do an
AMS commit (this means mode setting aswell as page flipping), if the
driver supports it. Until now the functionality is only tested on Intel
graphics. You need the drm-next kernel for most recent DRM kernel
developments. As boot option set "i915.nuclear_pageflip". Additionally
at the moment AMS is still hidden behind the environment variable
KWIN_DRM_AMS. Set it, if you want to try out AMS.

What needs to be done next: Make it possible to transfer EGL buffers
directly to planes and implement logic for deciding about using a plane
or not for a specific buffer.

You can read more about it on LWN:
https://lwn.net/Articles/653071
And on Martin's blog:
https://blog.martin-graesslin.com/blog/2015/08/layered-compositing/
I used as model previous work by Daniel Stone for Weston:
https://git.collabora.com/cgit/user/daniels/weston.git

Reviewed-by: mgraesslin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D2370
2016-08-31 14:06:31 +02:00

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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_output.h"
#include "drm_backend.h"
#include "drm_object_plane.h"
#include "drm_object_crtc.h"
#include "drm_object_connector.h"
#include <errno.h>
#include "composite.h"
#include "logind.h"
#include "logging.h"
#include "main.h"
#include "screens_drm.h"
#include "wayland_server.h"
// KWayland
#include <KWayland/Server/display.h>
#include <KWayland/Server/output_interface.h>
#include <KWayland/Server/outputchangeset.h>
#include <KWayland/Server/outputdevice_interface.h>
#include <KWayland/Server/outputmanagement_interface.h>
#include <KWayland/Server/outputconfiguration_interface.h>
// KF5
#include <KConfigGroup>
#include <KLocalizedString>
#include <KSharedConfig>
// Qt
#include <QCryptographicHash>
// drm
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <libdrm/drm_mode.h>
namespace KWin
{
DrmOutput::DrmOutput(DrmBackend *backend)
: QObject()
, m_backend(backend)
{
}
DrmOutput::~DrmOutput()
{
hideCursor();
cleanupBlackBuffer();
delete m_crtc;
delete m_conn;
delete m_waylandOutput.data();
delete m_waylandOutputDevice.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());
}
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();
}
}
bool DrmOutput::init(drmModeConnector *connector)
{
initEdid(connector);
initDpms(connector);
initUuid();
if (m_backend->atomicModeSetting()) {
if (!initPrimaryPlane()) {
return false;
}
}
m_savedCrtc.reset(drmModeGetCrtc(m_backend->fd(), m_crtcId));
if (!blank()) {
return false;
}
setDpms(DpmsMode::On);
if (!m_waylandOutput.isNull()) {
delete m_waylandOutput.data();
m_waylandOutput.clear();
}
m_waylandOutput = waylandServer()->display()->createOutput();
if (!m_waylandOutputDevice.isNull()) {
delete m_waylandOutputDevice.data();
m_waylandOutputDevice.clear();
}
m_waylandOutputDevice = waylandServer()->display()->createOutputDevice();
m_waylandOutputDevice->setUuid(m_uuid);
if (!m_edid.eisaId.isEmpty()) {
m_waylandOutput->setManufacturer(QString::fromLatin1(m_edid.eisaId));
} else {
m_waylandOutput->setManufacturer(i18n("unknown"));
}
m_waylandOutputDevice->setManufacturer(m_waylandOutput->manufacturer());
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"));
}
m_waylandOutputDevice->setModel(m_waylandOutput->model());
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);
m_waylandOutputDevice->setPhysicalSize(physicalSize);
// read in mode information
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];
KWayland::Server::OutputInterface::ModeFlags flags;
KWayland::Server::OutputDeviceInterface::ModeFlags deviceflags;
if (isCurrentMode(m)) {
flags |= KWayland::Server::OutputInterface::ModeFlag::Current;
deviceflags |= KWayland::Server::OutputDeviceInterface::ModeFlag::Current;
}
if (m->type & DRM_MODE_TYPE_PREFERRED) {
flags |= KWayland::Server::OutputInterface::ModeFlag::Preferred;
deviceflags |= KWayland::Server::OutputDeviceInterface::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);
KWayland::Server::OutputDeviceInterface::Mode mode;
mode.id = i;
mode.size = QSize(m->hdisplay, m->vdisplay);
mode.flags = deviceflags;
mode.refreshRate = refreshRate;
qCDebug(KWIN_DRM) << "Adding mode: " << i << mode.size;
m_waylandOutputDevice->addMode(mode);
}
// 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();
qCDebug(KWIN_DRM) << "Created OutputDevice";
m_waylandOutputDevice->create();
return true;
}
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;
}
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());
}
bool DrmOutput::initPrimaryPlane()
{
for (int i = 0; i < m_backend->planes().size(); ++i) {
DrmPlane* p = m_backend->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_crtcId)) {
continue;
}
p->setOutput(this);
m_primaryPlane = p;
qCDebug(KWIN_DRM) << "Initialized primary plane" << p->id() << "on CRTC" << m_crtcId;
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_backend->planes().size(); ++i) {
DrmPlane* p = m_backend->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_crtcId)) {
continue;
}
p->setOutput(this);
m_cursorPlane = p;
qCDebug(KWIN_DRM) << "Initialized cursor plane" << p->id() << "on CRTC" << m_crtcId;
return true;
}
return false;
}
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) {
qCDebug(KWIN_DRM) << "New DPMS mode equals old mode. DPMS unchanged.";
return;
}
if (m_backend->atomicModeSetting()) {
drmModeAtomicReq *req = drmModeAtomicAlloc();
if (atomicReqModesetPopulate(req, mode == DpmsMode::On) == DrmObject::AtomicReturn::Error) {
qCWarning(KWIN_DRM) << "Failed to populate atomic request for output" << m_crtcId;
return;
}
if (drmModeAtomicCommit(m_backend->fd(), req, DRM_MODE_ATOMIC_ALLOW_MODESET, this)) {
qCWarning(KWIN_DRM) << "Failed to commit atomic request for output" << m_crtcId;
} else {
qCDebug(KWIN_DRM) << "DPMS set for output" << m_crtcId;
}
drmModeAtomicFree(req);
} else {
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);
}
if (m_waylandOutputDevice) {
m_waylandOutputDevice->setGlobalPosition(pos);
}
}
void DrmOutput::setChanges(KWayland::Server::OutputChangeSet *changes)
{
m_changeset = changes;
qCDebug(KWIN_DRM) << "set changes in DrmOutput";
commitChanges();
}
bool DrmOutput::commitChanges()
{
Q_ASSERT(!m_waylandOutputDevice.isNull());
Q_ASSERT(!m_waylandOutput.isNull());
if (m_changeset.isNull()) {
qCDebug(KWIN_DRM) << "no changes";
// No changes to an output is an entirely valid thing
return true;
}
if (m_changeset->enabledChanged()) {
qCDebug(KWIN_DRM) << "Setting enabled:";
m_waylandOutputDevice->setEnabled(m_changeset->enabled());
}
if (m_changeset->modeChanged()) {
qCDebug(KWIN_DRM) << "Setting new mode:" << m_changeset->mode();
m_waylandOutputDevice->setCurrentMode(m_changeset->mode());
// FIXME: implement for wl_output
}
if (m_changeset->transformChanged()) {
qCDebug(KWIN_DRM) << "Server setting transform: " << (int)(m_changeset->transform());
m_waylandOutputDevice->setTransform(m_changeset->transform());
// FIXME: implement for wl_output
}
if (m_changeset->positionChanged()) {
qCDebug(KWIN_DRM) << "Server setting position: " << m_changeset->position();
m_waylandOutput->setGlobalPosition(m_changeset->position());
m_waylandOutputDevice->setGlobalPosition(m_changeset->position());
setGlobalPos(m_changeset->position());
// may just work already!
}
if (m_changeset->scaleChanged()) {
qCDebug(KWIN_DRM) << "Setting scale:" << m_changeset->scale();
m_waylandOutputDevice->setScale(m_changeset->scale());
// FIXME: implement for wl_output
}
return true;
}
void DrmOutput::pageFlipped()
{
if (m_backend->atomicModeSetting()){
foreach (DrmPlane *p, m_planesFlipList) {
pageFlippedBufferRemover(p->current(), p->next());
p->setCurrent(p->next());
p->setNext(nullptr);
}
m_planesFlipList.clear();
} else {
if (!m_nextBuffer) {
return;
}
pageFlippedBufferRemover(m_currentBuffer, m_nextBuffer);
m_currentBuffer = m_nextBuffer;
m_nextBuffer = nullptr;
}
cleanupBlackBuffer();
}
void DrmOutput::pageFlippedBufferRemover(DrmBuffer *oldbuffer, DrmBuffer *newbuffer)
{
if (newbuffer->deleteAfterPageFlip()) {
if ( oldbuffer && oldbuffer != newbuffer ) {
delete oldbuffer;
}
} else {
// although oldbuffer's pointer is remapped in pageFlipped(),
// we ignore the pointer completely anywhere else in this case
newbuffer->releaseGbm();
}
}
void DrmOutput::cleanupBlackBuffer()
{
if (m_blackBuffer) {
delete m_blackBuffer;
m_blackBuffer = nullptr;
}
}
bool DrmOutput::blank()
{
if (!m_blackBuffer) {
m_blackBuffer = m_backend->createBuffer(size());
if (!m_blackBuffer->map()) {
cleanupBlackBuffer();
return false;
}
m_blackBuffer->image()->fill(Qt::black);
}
// TODO: Do this atomically
return setModeLegacy(m_blackBuffer);
}
bool DrmOutput::present(DrmBuffer *buffer)
{
if (!buffer || buffer->bufferId() == 0) {
return false;
}
if (m_backend->atomicModeSetting()) {
return presentAtomically(buffer);
} else {
return presentLegacy(buffer);
}
}
bool DrmOutput::presentAtomically(DrmBuffer *buffer)
{
if (!LogindIntegration::self()->isActiveSession()) {
qCWarning(KWIN_DRM) << "Logind session not active.";
return false;
}
if (m_dpmsMode != DpmsMode::On) {
qCWarning(KWIN_DRM) << "No present() while screen off.";
return false;
}
if (m_primaryPlane->next()) {
qCWarning(KWIN_DRM) << "Page not yet flipped.";
return false;
}
DrmObject::AtomicReturn ret;
uint32_t flags = DRM_MODE_ATOMIC_NONBLOCK | DRM_MODE_PAGE_FLIP_EVENT;
// TODO: throwing an exception would be really handy here! (would mean change of compile options)
drmModeAtomicReq *req = drmModeAtomicAlloc();
if (!req) {
qCWarning(KWIN_DRM) << "DRM: couldn't allocate atomic request";
delete buffer;
return false;
}
// Do we need to set a new mode first?
bool doModeset = !m_primaryPlane->current();
if (doModeset) {
qCDebug(KWIN_DRM) << "Atomic Modeset requested";
if (drmModeCreatePropertyBlob(m_backend->fd(), &m_mode, sizeof(m_mode), &m_blobId)) {
qCWarning(KWIN_DRM) << "Failed to create property blob";
delete buffer;
return false;
}
ret = atomicReqModesetPopulate(req, true);
if (ret == DrmObject::AtomicReturn::Error){
drmModeAtomicFree(req);
delete buffer;
return false;
}
if (ret == DrmObject::AtomicReturn::Success) {
flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
}
}
m_primaryPlane->setNext(buffer); // TODO: Later not only use the primary plane for the buffer!
// i.e.: Assign planes
bool anyDamage = false;
foreach (DrmPlane* p, m_backend->planes()){
if (p->output() != this) {
continue;
}
ret = p->atomicReqPlanePopulate(req);
if (ret == DrmObject::AtomicReturn::Error) {
drmModeAtomicFree(req);
m_primaryPlane->setNext(nullptr);
m_planesFlipList.clear();
delete buffer;
return false;
}
if (ret == DrmObject::AtomicReturn::Success) {
anyDamage = true;
m_planesFlipList << p;
}
}
// no damage but force flip for atleast the primary plane anyway
if (!anyDamage) {
m_primaryPlane->setPropsValid(0);
if (m_primaryPlane->atomicReqPlanePopulate(req) == DrmObject::AtomicReturn::Error) {
drmModeAtomicFree(req);
m_primaryPlane->setNext(nullptr);
m_planesFlipList.clear();
delete buffer;
return false;
}
m_planesFlipList << m_primaryPlane;
}
if (drmModeAtomicCommit(m_backend->fd(), req, flags, this)) {
qCWarning(KWIN_DRM) << "Atomic request failed to commit:" << strerror(errno);
drmModeAtomicFree(req);
m_primaryPlane->setNext(nullptr);
m_planesFlipList.clear();
delete buffer;
return false;
}
if (doModeset) {
m_crtc->setPropsValid(m_crtc->propsValid() | m_crtc->propsPending());
m_conn->setPropsValid(m_conn->propsValid() | m_conn->propsPending());
}
foreach (DrmPlane* p, m_planesFlipList) {
p->setPropsValid(p->propsValid() | p->propsPending());
}
drmModeAtomicFree(req);
return true;
}
bool DrmOutput::presentLegacy(DrmBuffer *buffer)
{
if (m_nextBuffer) {
return false;
}
if (!LogindIntegration::self()->isActiveSession()) {
m_nextBuffer = buffer;
return false;
}
if (m_dpmsMode != DpmsMode::On) {
return false;
}
// Do we need to set a new mode first?
if (m_lastStride != buffer->stride() || m_lastGbm != buffer->isGbm()){
if (!setModeLegacy(buffer))
return false;
}
int errno_save = 0;
const bool ok = drmModePageFlip(m_backend->fd(), m_crtcId, buffer->bufferId(), DRM_MODE_PAGE_FLIP_EVENT, this) == 0;
if (ok) {
m_nextBuffer = buffer;
} else {
errno_save = errno;
qCWarning(KWIN_DRM) << "Page flip failed:" << strerror(errno);
delete buffer;
}
return ok;
}
bool DrmOutput::setModeLegacy(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;
}
}
DrmObject::AtomicReturn DrmOutput::atomicReqModesetPopulate(drmModeAtomicReq *req, bool enable)
{
if (enable) {
m_primaryPlane->setPropValue(int(DrmPlane::PropertyIndex::SrcW), m_mode.hdisplay << 16);
m_primaryPlane->setPropValue(int(DrmPlane::PropertyIndex::SrcH), m_mode.vdisplay << 16);
m_primaryPlane->setPropValue(int(DrmPlane::PropertyIndex::CrtcW), m_mode.hdisplay);
m_primaryPlane->setPropValue(int(DrmPlane::PropertyIndex::CrtcH), m_mode.vdisplay);
} else {
m_primaryPlane->setPropValue(int(DrmPlane::PropertyIndex::SrcW), 0);
m_primaryPlane->setPropValue(int(DrmPlane::PropertyIndex::SrcH), 0);
m_primaryPlane->setPropValue(int(DrmPlane::PropertyIndex::CrtcW), 0);
m_primaryPlane->setPropValue(int(DrmPlane::PropertyIndex::CrtcH), 0);
}
bool ret = true;
m_crtc->setPropsPending(0);
m_conn->setPropsPending(0);
ret &= m_conn->atomicAddProperty(req, int(DrmConnector::PropertyIndex::CrtcId), enable ? m_crtc->id() : 0);
ret &= m_crtc->atomicAddProperty(req, int(DrmCrtc::PropertyIndex::ModeId), enable ? m_blobId : 0);
ret &= m_crtc->atomicAddProperty(req, int(DrmCrtc::PropertyIndex::Active), enable);
if (!ret) {
qCWarning(KWIN_DRM) << "Failed to populate atomic modeset";
return DrmObject::AtomicReturn::Error;
}
if (!m_crtc->propsPending() && !m_conn->propsPending()) {
return DrmObject::AtomicReturn::NoChange;
}
return DrmObject::AtomicReturn::Success;
}
}
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