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
106 lines
2.5 KiB
C++
106 lines
2.5 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_PLANE_H
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#define KWIN_DRM_OBJECT_PLANE_H
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#include "drm_object.h"
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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 DrmBuffer;
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class DrmPlane : public DrmObject
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{
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public:
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DrmPlane(uint32_t plane_id, int fd);
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virtual ~DrmPlane();
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enum class PropertyIndex {
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Type = 0,
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SrcX,
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SrcY,
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SrcW,
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SrcH,
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CrtcX,
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CrtcY,
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CrtcW,
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CrtcH,
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FbId,
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CrtcId,
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Count
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};
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enum class TypeIndex {
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Primary = 0,
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Cursor,
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Overlay,
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Count
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};
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bool init();
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bool initProps();
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TypeIndex type();
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bool isCrtcSupported(uint32_t crtc);
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DrmObject::AtomicReturn atomicReqPlanePopulate(drmModeAtomicReq *req);
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DrmBuffer *current(){
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return m_current;
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}
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DrmBuffer *next(){
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return m_next;
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}
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void setCurrent(DrmBuffer *b){
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m_current = b;
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}
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void setNext(DrmBuffer *b){
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m_next = b;
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}
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QVector<uint32_t> formats(){
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return m_formats;
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}
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void setFormats(uint32_t const *f, int fcount);
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void setPossibleCrtcs(uint32_t value){
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m_possibleCrtcs = value;
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}
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uint32_t possibleCrtcs(){
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return m_possibleCrtcs;
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}
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private:
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DrmBuffer *m_current = nullptr;
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DrmBuffer *m_next = nullptr;
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// TODO: See weston drm_output_check_plane_format for future use of these member variables
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QVector<uint32_t> m_formats; // Possible formats, which can be presented on this plane
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// TODO: when using overlay planes in the future: restrict possible screens / crtcs of planes
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uint32_t m_possibleCrtcs;
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};
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}
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#endif
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