997cf97c9f
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
137 lines
3.3 KiB
C++
137 lines
3.3 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2016 Roman Gilg <subdiff@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#ifndef KWIN_DRM_OBJECT_H
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#define KWIN_DRM_OBJECT_H
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#include <QVector>
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#include <QByteArray>
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// drm
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#include <xf86drmMode.h>
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namespace KWin
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{
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class DrmOutput;
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class DrmObject
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{
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public:
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// creates drm object by its id delivered by the kernel
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DrmObject(uint32_t object_id, int fd);
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virtual ~DrmObject() = 0;
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enum class AtomicReturn {
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NoChange,
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Success,
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Error
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};
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virtual bool init() = 0;
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uint32_t id() const {
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return m_id;
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}
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DrmOutput* output() const {
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return m_output;
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}
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void setOutput(DrmOutput* output) {
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m_output = output;
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}
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uint32_t propId(int index) {
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return m_props[index]->propId();
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}
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uint64_t propValue(int index) {
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return m_props[index]->value();
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}
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void setPropValue(int index, uint64_t new_value);
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uint32_t propsPending() {
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return m_propsPending;
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}
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uint32_t propsValid() {
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return m_propsValid;
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}
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void setPropsPending(uint32_t value) {
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m_propsPending = value;
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}
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void setPropsValid(uint32_t value) {
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m_propsValid = value;
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}
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bool atomicAddProperty(drmModeAtomicReq *req, int prop, uint64_t value);
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protected:
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const int m_fd = 0;
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const uint32_t m_id = 0;
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DrmOutput *m_output = nullptr;
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QVector<QByteArray> m_propsNames; // for comparision with received name of DRM object
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class Property;
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QVector<Property*> m_props;
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uint32_t m_propsPending = 0;
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uint32_t m_propsValid = 0;
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virtual bool initProps() = 0; // only derived classes know names and quantity of properties
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void initProp(int n, drmModeObjectProperties *properties, QVector<QByteArray> enumNames = QVector<QByteArray>(0));
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class Property
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{
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public:
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Property(drmModePropertyRes *prop, uint64_t val, QVector<QByteArray> enumNames);
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virtual ~Property();
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void initEnumMap(drmModePropertyRes *prop);
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uint64_t enumMap(int n) {
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return m_enumMap[n]; // TODO: test on index out of bounds?
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}
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uint32_t propId() {
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return m_propId;
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}
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uint32_t value() {
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return m_value;
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}
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void setValue(uint64_t new_value) {
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m_value = new_value;
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}
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private:
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uint32_t m_propId = 0;
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QByteArray m_propName;
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uint64_t m_value = 0;
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QVector<uint64_t> m_enumMap;
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QVector<QByteArray> m_enumNames;
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};
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};
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}
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#endif
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