kwin/src/backends/drm/drm_pipeline.cpp
Xaver Hugl f097440eb4 backends/drm: don't cache formats
While it could be useful with tiled displays, the isFormatSupported and
supportedModifier functions can be called before prepareModeset, so where
m_formats is still empty. Additionally they're neither in a hot path nor
performance critical.
2021-11-30 10:29:51 +01:00

627 lines
21 KiB
C++

/*
KWin - the KDE window manager
This file is part of the KDE project.
SPDX-FileCopyrightText: 2021 Xaver Hugl <xaver.hugl@gmail.com>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "drm_pipeline.h"
#include <errno.h>
#include "logging.h"
#include "drm_gpu.h"
#include "drm_object_connector.h"
#include "drm_object_crtc.h"
#include "drm_object_plane.h"
#include "drm_buffer.h"
#include "cursor.h"
#include "session.h"
#include "drm_output.h"
#include "drm_backend.h"
#include "egl_gbm_backend.h"
#include "drm_buffer_gbm.h"
#include <gbm.h>
#include <drm_fourcc.h>
namespace KWin
{
DrmPipeline::DrmPipeline(DrmConnector *conn)
: m_output(nullptr)
, m_connector(conn)
{
}
DrmPipeline::~DrmPipeline()
{
m_output = nullptr;
if (m_pageflipPending && m_current.crtc) {
pageFlipped({});
}
}
bool DrmPipeline::present(const QSharedPointer<DrmBuffer> &buffer)
{
Q_ASSERT(pending.crtc);
if (!buffer) {
if (m_output) {
m_output->presentFailed();
}
return false;
}
m_primaryBuffer = buffer;
auto buf = dynamic_cast<DrmGbmBuffer*>(buffer.data());
// with direct scanout disallow modesets, calling presentFailed() and logging warnings
bool directScanout = buf && buf->clientBuffer();
if (gpu()->needsModeset()) {
if (directScanout) {
return false;
}
m_modesetPresentPending = true;
return gpu()->maybeModeset();
}
if (gpu()->atomicModeSetting()) {
if (!commitPipelines({this}, CommitMode::Commit)) {
// update properties and try again
m_connector->updateProperties();
if (pending.crtc) {
pending.crtc->updateProperties();
if (pending.crtc->primaryPlane()) {
pending.crtc->primaryPlane()->updateProperties();
}
}
if (!commitPipelines({this}, CommitMode::Commit)) {
if (directScanout) {
return false;
}
qCWarning(KWIN_DRM) << "Atomic present failed!" << strerror(errno);
printDebugInfo();
if (m_output) {
m_output->presentFailed();
}
return false;
}
}
} else {
if (!presentLegacy()) {
qCWarning(KWIN_DRM) << "Present failed!" << strerror(errno);
if (m_output) {
m_output->presentFailed();
}
return false;
}
}
return true;
}
bool DrmPipeline::commitPipelines(const QVector<DrmPipeline*> &pipelines, CommitMode mode, const QVector<DrmObject*> &unusedObjects)
{
Q_ASSERT(!pipelines.isEmpty());
if (pipelines[0]->gpu()->atomicModeSetting()) {
drmModeAtomicReq *req = drmModeAtomicAlloc();
if (!req) {
qCDebug(KWIN_DRM) << "Failed to allocate drmModeAtomicReq!" << strerror(errno);
return false;
}
uint32_t flags = 0;
const auto &failed = [pipelines, req, mode, &flags, unusedObjects](){
drmModeAtomicFree(req);
printFlags(flags);
for (const auto &pipeline : pipelines) {
pipeline->printDebugInfo();
if (pipeline->m_oldTestBuffer) {
pipeline->m_primaryBuffer = pipeline->m_oldTestBuffer;
pipeline->m_oldTestBuffer = nullptr;
}
pipeline->m_connector->rollbackPending();
if (pipeline->pending.crtc) {
pipeline->pending.crtc->rollbackPending();
pipeline->pending.crtc->primaryPlane()->rollbackPending();
}
}
for (const auto &obj : unusedObjects) {
printProps(obj, PrintMode::OnlyChanged);
obj->rollbackPending();
}
return false;
};
for (const auto &pipeline : pipelines) {
if (!pipeline->checkTestBuffer()) {
qCWarning(KWIN_DRM) << "Checking test buffer failed for" << mode;
return failed();
}
if (!pipeline->populateAtomicValues(req, flags)) {
qCWarning(KWIN_DRM) << "Populating atomic values failed for" << mode;
return failed();
}
}
for (const auto &unused : unusedObjects) {
unused->disable();
if (unused->needsModeset()) {
flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
}
if (!unused->atomicPopulate(req)) {
qCWarning(KWIN_DRM) << "Populating atomic values failed for unused resource" << unused;
return failed();
}
}
bool modeset = flags & DRM_MODE_ATOMIC_ALLOW_MODESET;
Q_ASSERT(!modeset || mode != CommitMode::Commit);
if (modeset) {
// The kernel fails commits with DRM_MODE_PAGE_FLIP_EVENT when a crtc is disabled in the commit
// and already was disabled before, to work around some quirks in old userspace.
// Instead of using DRM_MODE_PAGE_FLIP_EVENT | DRM_MODE_ATOMIC_NONBLOCK, do the modeset in a blocking
// fashion without page flip events and directly call the pageFlipped method afterwards
flags = flags & (~DRM_MODE_PAGE_FLIP_EVENT);
} else {
flags |= DRM_MODE_ATOMIC_NONBLOCK;
}
if (drmModeAtomicCommit(pipelines[0]->gpu()->fd(), req, (flags & (~DRM_MODE_PAGE_FLIP_EVENT)) | DRM_MODE_ATOMIC_TEST_ONLY, nullptr) != 0) {
qCWarning(KWIN_DRM) << "Atomic test for" << mode << "failed!" << strerror(errno);
return failed();
}
if (mode != CommitMode::Test && drmModeAtomicCommit(pipelines[0]->gpu()->fd(), req, flags, nullptr) != 0) {
qCWarning(KWIN_DRM) << "Atomic commit failed! This should never happen!" << strerror(errno);
return failed();
}
for (const auto &pipeline : pipelines) {
pipeline->m_oldTestBuffer = nullptr;
pipeline->m_connector->commitPending();
if (pipeline->pending.crtc) {
pipeline->pending.crtc->commitPending();
pipeline->pending.crtc->primaryPlane()->commitPending();
if (pipeline->pending.crtc->cursorPlane()) {
pipeline->pending.crtc->cursorPlane()->commitPending();
}
}
if (mode != CommitMode::Test) {
if (pipeline->activePending()) {
pipeline->m_pageflipPending = true;
}
pipeline->m_connector->commit();
if (pipeline->pending.crtc) {
pipeline->pending.crtc->primaryPlane()->setNext(pipeline->m_primaryBuffer);
pipeline->pending.crtc->commit();
pipeline->pending.crtc->primaryPlane()->commit();
if (pipeline->pending.crtc->cursorPlane()) {
pipeline->pending.crtc->cursorPlane()->commit();
}
}
pipeline->m_current = pipeline->pending;
if (modeset && pipeline->activePending()) {
pipeline->pageFlipped(std::chrono::steady_clock::now().time_since_epoch());
}
}
}
for (const auto &obj : unusedObjects) {
obj->commitPending();
if (mode != CommitMode::Test) {
obj->commit();
}
}
drmModeAtomicFree(req);
return true;
} else {
bool failure = false;
for (const auto &pipeline : pipelines) {
if (!pipeline->applyPendingChangesLegacy()) {
failure = true;
break;
}
}
if (failure) {
// at least try to revert the config
for (const auto &pipeline : pipelines) {
pipeline->revertPendingChanges();
pipeline->applyPendingChangesLegacy();
}
return false;
} else {
for (const auto &pipeline : pipelines) {
pipeline->applyPendingChanges();
pipeline->m_current = pipeline->pending;
if (mode == CommitMode::CommitModeset && mode != CommitMode::Test && pipeline->activePending()) {
pipeline->pageFlipped(std::chrono::steady_clock::now().time_since_epoch());
}
}
return true;
}
}
}
bool DrmPipeline::populateAtomicValues(drmModeAtomicReq *req, uint32_t &flags)
{
if (needsModeset()) {
prepareModeset();
flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
}
if (activePending()) {
flags |= DRM_MODE_PAGE_FLIP_EVENT;
}
if (pending.crtc) {
auto modeSize = m_connector->modes()[pending.modeIndex]->size();
pending.crtc->primaryPlane()->set(QPoint(0, 0), m_primaryBuffer ? m_primaryBuffer->size() : modeSize, QPoint(0, 0), modeSize);
pending.crtc->primaryPlane()->setBuffer(activePending() ? m_primaryBuffer.get() : nullptr);
pending.crtc->setPending(DrmCrtc::PropertyIndex::VrrEnabled, pending.syncMode == RenderLoopPrivate::SyncMode::Adaptive);
pending.crtc->setPending(DrmCrtc::PropertyIndex::Gamma_LUT, pending.gamma ? pending.gamma->blobId() : 0);
}
return m_connector->atomicPopulate(req) && (!pending.crtc || (pending.crtc->atomicPopulate(req) && pending.crtc->primaryPlane()->atomicPopulate(req)));
}
bool DrmPipeline::presentLegacy()
{
if ((!pending.crtc->current() || pending.crtc->current()->needsModeChange(m_primaryBuffer.get())) && !legacyModeset()) {
return false;
}
QVector<DrmPipeline*> *userData = new QVector<DrmPipeline*>();
*userData << this;
if (drmModePageFlip(gpu()->fd(), pending.crtc->id(), m_primaryBuffer ? m_primaryBuffer->bufferId() : 0, DRM_MODE_PAGE_FLIP_EVENT, userData) != 0) {
qCWarning(KWIN_DRM) << "Page flip failed:" << strerror(errno) << m_primaryBuffer;
return false;
}
m_pageflipPending = true;
pending.crtc->setNext(m_primaryBuffer);
return true;
}
bool DrmPipeline::checkTestBuffer()
{
if (!pending.crtc || (m_primaryBuffer && m_primaryBuffer->size() == sourceSize())) {
return true;
}
auto backend = gpu()->eglBackend();
QSharedPointer<DrmBuffer> buffer;
// try to re-use buffers if possible.
const auto &checkBuffer = [this, backend, &buffer](const QSharedPointer<DrmBuffer> &buf){
const auto &mods = supportedModifiers(buf->format());
if (backend && buf->format() == backend->drmFormat()
&& (mods.isEmpty() || mods.contains(buf->modifier()))
&& buf->size() == sourceSize()) {
buffer = buf;
}
};
if (pending.crtc->primaryPlane() && pending.crtc->primaryPlane()->next()) {
checkBuffer(pending.crtc->primaryPlane()->next());
} else if (pending.crtc->primaryPlane() && pending.crtc->primaryPlane()->current()) {
checkBuffer(pending.crtc->primaryPlane()->current());
} else if (pending.crtc->next()) {
checkBuffer(pending.crtc->next());
} else if (pending.crtc->current()) {
checkBuffer(pending.crtc->current());
}
// if we don't have a fitting buffer already, get or create one
if (!buffer) {
if (backend && m_output) {
buffer = backend->renderTestFrame(m_output);
} else if (backend && gpu()->gbmDevice()) {
gbm_bo *bo = gbm_bo_create(gpu()->gbmDevice(), sourceSize().width(), sourceSize().height(), GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
if (!bo) {
return false;
}
buffer = QSharedPointer<DrmGbmBuffer>::create(gpu(), bo, nullptr);
} else {
buffer = QSharedPointer<DrmDumbBuffer>::create(gpu(), sourceSize());
}
}
if (buffer && buffer->bufferId()) {
m_oldTestBuffer = m_primaryBuffer;
m_primaryBuffer = buffer;
return true;
}
return false;
}
bool DrmPipeline::setCursor(const QSharedPointer<DrmDumbBuffer> &buffer, const QPoint &hotspot)
{
return pending.crtc->setLegacyCursor(buffer, hotspot);
}
bool DrmPipeline::moveCursor(QPoint pos)
{
return pending.crtc->moveLegacyCursor(pos);
}
void DrmPipeline::prepareModeset()
{
if (!pending.crtc) {
m_connector->setPending(DrmConnector::PropertyIndex::CrtcId, 0);
return;
}
auto mode = m_connector->modes()[pending.modeIndex];
m_connector->setPending(DrmConnector::PropertyIndex::CrtcId, activePending() ? pending.crtc->id() : 0);
if (const auto &prop = m_connector->getProp(DrmConnector::PropertyIndex::Broadcast_RGB)) {
prop->setEnum(pending.rgbRange);
}
pending.crtc->setPending(DrmCrtc::PropertyIndex::Active, activePending());
pending.crtc->setPending(DrmCrtc::PropertyIndex::ModeId, activePending() ? mode->blobId() : 0);
pending.crtc->primaryPlane()->setPending(DrmPlane::PropertyIndex::CrtcId, activePending() ? pending.crtc->id() : 0);
pending.crtc->primaryPlane()->setTransformation(DrmPlane::Transformation::Rotate0);
pending.crtc->primaryPlane()->set(QPoint(0, 0), sourceSize(), QPoint(0, 0), mode->size());
}
void DrmPipeline::applyPendingChanges()
{
if (!pending.crtc) {
pending.active = false;
}
m_next = pending;
}
bool DrmPipeline::applyPendingChangesLegacy()
{
if (!pending.active && pending.crtc) {
drmModeSetCursor(gpu()->fd(), pending.crtc->id(), 0, 0, 0);
}
if (pending.active) {
Q_ASSERT(pending.crtc);
if (auto vrr = pending.crtc->getProp(DrmCrtc::PropertyIndex::VrrEnabled); vrr && !vrr->setPropertyLegacy(pending.syncMode == RenderLoopPrivate::SyncMode::Adaptive)) {
qCWarning(KWIN_DRM) << "Setting vrr failed!" << strerror(errno);
return false;
}
if (const auto &rgbRange = m_connector->getProp(DrmConnector::PropertyIndex::Broadcast_RGB)) {
rgbRange->setEnumLegacy(pending.rgbRange);
}
if (needsModeset() &&!legacyModeset()) {
return false;
}
m_connector->getProp(DrmConnector::PropertyIndex::Dpms)->setCurrent(DRM_MODE_DPMS_ON);
if (pending.gamma && drmModeCrtcSetGamma(gpu()->fd(), pending.crtc->id(), pending.gamma->size(),
pending.gamma->red(), pending.gamma->green(), pending.gamma->blue()) != 0) {
qCWarning(KWIN_DRM) << "Setting gamma failed!" << strerror(errno);
return false;
}
pending.crtc->setLegacyCursor();
}
if (!m_connector->getProp(DrmConnector::PropertyIndex::Dpms)->setPropertyLegacy(pending.active ? DRM_MODE_DPMS_ON : DRM_MODE_DPMS_OFF)) {
qCWarning(KWIN_DRM) << "Setting legacy dpms failed!" << strerror(errno);
return false;
}
return true;
}
bool DrmPipeline::legacyModeset()
{
auto mode = m_connector->modes()[pending.modeIndex];
uint32_t connId = m_connector->id();
if (!checkTestBuffer() || drmModeSetCrtc(gpu()->fd(), pending.crtc->id(), m_primaryBuffer->bufferId(), 0, 0, &connId, 1, mode->nativeMode()) != 0) {
qCWarning(KWIN_DRM) << "Modeset failed!" << strerror(errno);
pending = m_next;
m_primaryBuffer = m_oldTestBuffer;
return false;
}
m_oldTestBuffer = nullptr;
// make sure the buffer gets kept alive, or the modeset gets reverted by the kernel
if (pending.crtc->current()) {
pending.crtc->setNext(m_primaryBuffer);
} else {
pending.crtc->setCurrent(m_primaryBuffer);
}
return true;
}
QSize DrmPipeline::sourceSize() const
{
auto mode = m_connector->modes()[pending.modeIndex];
if (pending.transformation & (DrmPlane::Transformation::Rotate90 | DrmPlane::Transformation::Rotate270)) {
return mode->size().transposed();
}
return mode->size();
}
bool DrmPipeline::isCursorVisible() const
{
return pending.crtc && pending.crtc->isCursorVisible(QRect(QPoint(0, 0), m_connector->currentMode()->size()));
}
QPoint DrmPipeline::cursorPos() const
{
return pending.crtc->cursorPos();
}
DrmConnector *DrmPipeline::connector() const
{
return m_connector;
}
DrmGpu *DrmPipeline::gpu() const
{
return m_connector->gpu();
}
void DrmPipeline::pageFlipped(std::chrono::nanoseconds timestamp)
{
m_current.crtc->flipBuffer();
if (m_current.crtc->primaryPlane()) {
m_current.crtc->primaryPlane()->flipBuffer();
}
m_pageflipPending = false;
if (m_output) {
m_output->pageFlipped(timestamp);
}
}
void DrmPipeline::setOutput(DrmOutput *output)
{
m_output = output;
}
DrmOutput *DrmPipeline::output() const
{
return m_output;
}
bool DrmPipeline::isFormatSupported(uint32_t drmFormat) const
{
if (pending.crtc) {
if (pending.crtc->primaryPlane()) {
return pending.crtc->primaryPlane()->formats().contains(drmFormat);
} else {
return drmFormat == DRM_FORMAT_XRGB8888 || drmFormat == DRM_FORMAT_ARGB8888;
}
} else {
return false;
}
}
QVector<uint64_t> DrmPipeline::supportedModifiers(uint32_t drmFormat) const
{
if (pending.crtc && pending.crtc->primaryPlane()) {
return pending.crtc->primaryPlane()->formats()[drmFormat];
} else {
return {};
}
}
bool DrmPipeline::needsModeset() const
{
return pending.crtc != m_current.crtc
|| pending.active != m_current.active
|| pending.modeIndex != m_current.modeIndex
|| pending.rgbRange != m_current.rgbRange
|| pending.transformation != m_current.transformation
|| m_modesetPresentPending;
}
bool DrmPipeline::activePending() const
{
return pending.crtc && pending.active;
}
void DrmPipeline::revertPendingChanges()
{
pending = m_next;
}
bool DrmPipeline::pageflipPending() const
{
return m_pageflipPending;
}
bool DrmPipeline::modesetPresentPending() const
{
return m_modesetPresentPending;
}
void DrmPipeline::resetModesetPresentPending()
{
m_modesetPresentPending = false;
}
DrmCrtc *DrmPipeline::currentCrtc() const
{
return m_current.crtc;
}
DrmGammaRamp::DrmGammaRamp(DrmGpu *gpu, const GammaRamp &lut)
: m_gpu(gpu)
, m_lut(lut)
{
if (gpu->atomicModeSetting()) {
QVector<drm_color_lut> atomicLut(lut.size());
for (uint32_t i = 0; i < lut.size(); i++) {
atomicLut[i].red = lut.red()[i];
atomicLut[i].green = lut.green()[i];
atomicLut[i].blue = lut.blue()[i];
}
if (drmModeCreatePropertyBlob(gpu->fd(), atomicLut.data(), sizeof(drm_color_lut) * lut.size(), &m_blobId) != 0) {
qCWarning(KWIN_DRM) << "Failed to create gamma blob!" << strerror(errno);
}
}
}
DrmGammaRamp::~DrmGammaRamp()
{
if (m_blobId != 0) {
drmModeDestroyPropertyBlob(m_gpu->fd(), m_blobId);
}
}
uint32_t DrmGammaRamp::blobId() const
{
return m_blobId;
}
uint32_t DrmGammaRamp::size() const
{
return m_lut.size();
}
uint16_t *DrmGammaRamp::red() const
{
return const_cast<uint16_t*>(m_lut.red());
}
uint16_t *DrmGammaRamp::green() const
{
return const_cast<uint16_t*>(m_lut.green());
}
uint16_t *DrmGammaRamp::blue() const
{
return const_cast<uint16_t*>(m_lut.blue());
}
void DrmPipeline::printFlags(uint32_t flags)
{
if (flags == 0) {
qCWarning(KWIN_DRM) << "Flags: none";
} else {
qCWarning(KWIN_DRM) << "Flags:";
if (flags & DRM_MODE_PAGE_FLIP_EVENT) {
qCWarning(KWIN_DRM) << "\t DRM_MODE_PAGE_FLIP_EVENT";
}
if (flags & DRM_MODE_ATOMIC_ALLOW_MODESET) {
qCWarning(KWIN_DRM) << "\t DRM_MODE_ATOMIC_ALLOW_MODESET";
}
if (flags & DRM_MODE_PAGE_FLIP_ASYNC) {
qCWarning(KWIN_DRM) << "\t DRM_MODE_PAGE_FLIP_ASYNC";
}
}
}
void DrmPipeline::printProps(DrmObject *object, PrintMode mode)
{
auto list = object->properties();
bool any = mode == PrintMode::All || std::any_of(list.constBegin(), list.constEnd(), [](const auto &prop){
return prop && !prop->isImmutable() && prop->needsCommit();
});
if (!any) {
return;
}
qCWarning(KWIN_DRM) << object->typeName() << object->id();
for (const auto &prop : list) {
if (prop) {
uint64_t current = prop->name().startsWith("SRC_") ? prop->current() >> 16 : prop->current();
if (prop->isImmutable() || !prop->needsCommit()) {
if (mode == PrintMode::All) {
qCWarning(KWIN_DRM).nospace() << "\t" << prop->name() << ": " << current;
}
} else {
uint64_t pending = prop->name().startsWith("SRC_") ? prop->pending() >> 16 : prop->pending();
qCWarning(KWIN_DRM).nospace() << "\t" << prop->name() << ": " << current << "->" << pending;
}
}
}
}
void DrmPipeline::printDebugInfo() const
{
qCWarning(KWIN_DRM) << "Drm objects:";
printProps(m_connector, PrintMode::All);
if (pending.crtc) {
printProps(pending.crtc, PrintMode::All);
if (pending.crtc->primaryPlane()) {
printProps(pending.crtc->primaryPlane(), PrintMode::All);
}
}
}
}