kwin/src/backends/drm/drm_object_plane.cpp

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2020-08-02 22:22:19 +00:00
/*
KWin - the KDE window manager
This file is part of the KDE project.
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SPDX-FileCopyrightText: 2016 Roman Gilg <subdiff@gmail.com>
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SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "drm_object_plane.h"
#include "drm_buffer.h"
#include "drm_gpu.h"
#include "drm_pointer.h"
#include "logging.h"
#include "config-kwin.h"
#include <drm_fourcc.h>
namespace KWin
{
DrmPlane::DrmPlane(DrmGpu *gpu, uint32_t planeId)
: DrmObject(gpu, planeId, {
PropertyDefinition(QByteArrayLiteral("type"), Requirement::Required, {
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QByteArrayLiteral("Overlay"),
QByteArrayLiteral("Primary"),
QByteArrayLiteral("Cursor")}),
PropertyDefinition(QByteArrayLiteral("SRC_X"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("SRC_Y"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("SRC_W"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("SRC_H"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("CRTC_X"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("CRTC_Y"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("CRTC_W"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("CRTC_H"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("FB_ID"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("CRTC_ID"), Requirement::Required),
PropertyDefinition(QByteArrayLiteral("rotation"), Requirement::Optional, {
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QByteArrayLiteral("rotate-0"),
QByteArrayLiteral("rotate-90"),
QByteArrayLiteral("rotate-180"),
QByteArrayLiteral("rotate-270"),
QByteArrayLiteral("reflect-x"),
QByteArrayLiteral("reflect-y")}),
PropertyDefinition(QByteArrayLiteral("IN_FORMATS"), Requirement::Optional),
}, DRM_MODE_OBJECT_PLANE)
{
}
bool DrmPlane::init()
{
DrmScopedPointer<drmModePlane> p(drmModeGetPlane(gpu()->fd(), id()));
if (!p) {
qCWarning(KWIN_DRM) << "Failed to get kernel plane" << id();
return false;
}
m_possibleCrtcs = p->possible_crtcs;
bool success = initProps();
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if (success) {
m_supportedTransformations = Transformations();
auto checkSupport = [this] (uint64_t value, Transformation t) {
if (propHasEnum(PropertyIndex::Rotation, value)) {
m_supportedTransformations |= t;
}
};
checkSupport(0, Transformation::Rotate0);
checkSupport(1, Transformation::Rotate90);
checkSupport(2, Transformation::Rotate180);
checkSupport(3, Transformation::Rotate270);
checkSupport(4, Transformation::ReflectX);
checkSupport(5, Transformation::ReflectY);
// read formats from blob if available and if modifiers are supported, and from the plane object if not
bool modifiersEnvSet = false;
bool modifiersEnv = qEnvironmentVariableIntValue("KWIN_DRM_USE_MODIFIERS", &modifiersEnvSet) != 0;
bool allowModifiers = (gpu()->isNVidia() && !modifiersEnvSet) || (modifiersEnvSet && modifiersEnv);
if (auto formatProp = getProp(PropertyIndex::In_Formats); formatProp && gpu()->addFB2ModifiersSupported() && allowModifiers) {
DrmScopedPointer<drmModePropertyBlobRes> propertyBlob(drmModeGetPropertyBlob(gpu()->fd(), formatProp->current()));
if (propertyBlob && propertyBlob->data) {
auto blob = static_cast<drm_format_modifier_blob*>(propertyBlob->data);
auto modifiers = reinterpret_cast<drm_format_modifier*>(reinterpret_cast<uint8_t*>(blob) + blob->modifiers_offset);
uint32_t *formatarr = reinterpret_cast<uint32_t*>(reinterpret_cast<uint8_t*>(blob) + blob->formats_offset);
for (uint32_t f = 0; f < blob->count_formats; f++) {
auto format = formatarr[f];
QVector<uint64_t> mods;
for (uint32_t m = 0; m < blob->count_modifiers; m++) {
auto modifier = &modifiers[m];
// The modifier advertisement blob is partitioned into groups of 64 formats
if (m < modifier->offset || m > modifier->offset + 63) {
continue;
}
if (!(modifier->formats & (1 << (f - modifier->offset)))) {
continue;
}
mods << modifier->modifier;
}
m_supportedFormats.insert(format, mods);
}
}
} else {
for (uint32_t i = 0; i < p->count_formats; i++) {
m_supportedFormats.insert(p->formats[i], {});
}
}
if (m_supportedFormats.isEmpty()) {
qCWarning(KWIN_DRM) << "Driver doesn't advertise any formats for this plane. Falling back to XRGB8888 and ARGB8888 without modifiers";
m_supportedFormats.insert(DRM_FORMAT_XRGB8888, {});
m_supportedFormats.insert(DRM_FORMAT_ARGB8888, {});
}
}
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return success;
}
DrmPlane::TypeIndex DrmPlane::type()
{
const auto &prop = getProp(PropertyIndex::Type);
return prop->enumForValue<DrmPlane::TypeIndex>(prop->current());
}
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void DrmPlane::setNext(const QSharedPointer<DrmBuffer> &b)
{
m_next = b;
}
bool DrmPlane::setTransformation(Transformations t)
{
if (m_supportedTransformations & t) {
return setPending(PropertyIndex::Rotation, t);
} else {
return false;
}
}
DrmPlane::Transformations DrmPlane::transformation()
{
if (auto property = getProp(PropertyIndex::Rotation)) {
return Transformations(static_cast<uint32_t>(property->pending()));
}
return Transformations(Transformation::Rotate0);
}
void DrmPlane::flipBuffer()
{
m_current = m_next;
m_next = nullptr;
}
void DrmPlane::set(const QPoint &srcPos, const QSize &srcSize, const QPoint &dstPos, const QSize &dstSize)
{
// Src* are in 16.16 fixed point format
setPending(PropertyIndex::SrcX, srcPos.x() << 16);
setPending(PropertyIndex::SrcY, srcPos.y() << 16);
setPending(PropertyIndex::SrcW, srcSize.width() << 16);
setPending(PropertyIndex::SrcH, srcSize.height() << 16);
setPending(PropertyIndex::CrtcX, dstPos.x());
setPending(PropertyIndex::CrtcY, dstPos.y());
setPending(PropertyIndex::CrtcW, dstSize.width());
setPending(PropertyIndex::CrtcH, dstSize.height());
}
void DrmPlane::setBuffer(DrmBuffer *buffer)
{
setPending(PropertyIndex::FbId, buffer ? buffer->bufferId() : 0);
}
bool DrmPlane::needsModeset() const
{
auto rotation = getProp(PropertyIndex::Rotation);
if (rotation && rotation->needsCommit()) {
return true;
}
return getProp(PropertyIndex::CrtcId)->needsCommit();
}
bool DrmPlane::isCrtcSupported(int pipeIndex) const
{
return (m_possibleCrtcs & (1 << pipeIndex));
}
QMap<uint32_t, QVector<uint64_t>> DrmPlane::formats() const
{
return m_supportedFormats;
}
QSharedPointer<DrmBuffer> DrmPlane::current() const
{
return m_current;
}
QSharedPointer<DrmBuffer> DrmPlane::next() const
{
return m_next;
}
void DrmPlane::setCurrent(const QSharedPointer<DrmBuffer> &b)
{
m_current = b;
}
DrmPlane::Transformations DrmPlane::supportedTransformations() const
{
return m_supportedTransformations;
}
}