This check is completely wrong for mobile GPUs where GPU are internal
and are not attached through PCI subsystem,
P: /devices/platform/display-engine/drm/card1
N: dri/card1
L: 0
S: dri/by-path/platform-display-engine-card
E: DEVPATH=/devices/platform/display-engine/drm/card1
E: DEVNAME=/dev/dri/card1
E: DEVTYPE=drm_minor
E: MAJOR=226
E: MINOR=1
E: SUBSYSTEM=drm
E: USEC_INITIALIZED=4239383
E: ID_PATH=platform-display-engine
E: ID_PATH_TAG=platform-display-engine
E: ID_FOR_SEAT=drm-platform-display-engine
E: DEVLINKS=/dev/dri/by-path/platform-display-engine-card
E: TAGS=:master-of-seat:seat:uaccess:
For example, on A64 platform, the KMS capable card is card1 which is not
attached with PCI.
The main advantage of SPDX license identifiers over the traditional
license headers is that it's more difficult to overlook inappropriate
licenses for kwin, for example GPL 3. We also don't have to copy a
lot of boilerplate text.
In order to create this change, I ran licensedigger -r -c from the
toplevel source directory.
- The name of tty devices is different; put detection into
the CMakeLists and pass that as a define when building
virtual_terminal.cpp -- this means no ifdeffery for the path.
- The name of dri devices is different; FreeBSD just has one.
Summary:
Instead we depend on the surfaceless platform for which we recently
added support. Thus the plugin does not need to use gbm and udev
anymore. So simplifies a lot.
Test Plan: ctest (prior to breaking change) passes
Reviewers: #kwin
Subscribers: kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D18160
Summary: This prevents the firstFound device, or any device detected by UdevEnumerate::find that is not from the same seat kwin is running under, from being handled
Test Plan:
made sure that kwin starts on a default udev (assuming a blank ID_SEAT attribute on a device means the device is on seat0)
added /dev/dri/card1 to seat1 and /dev/dri/card0 to seat0.
Start kwin with the drm-backend on seat0 and seat1, and make sure it starts on both instances
Reviewers: #kwin, graesslin
Reviewed By: #kwin, graesslin
Subscribers: rkflx, graesslin, kwin, #kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D9553
Summary:
This adds the ability for kwin's udev handler to detect a usable framebuffer device.
This is very similar to the function that queries the primary GPU.
Reviewers: #kwin, graesslin
Reviewed By: #kwin, graesslin
Subscribers: rkflx, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D9554
Summary:
The egl implementation for the virtual platform tries to use a render
node if available. If there is no render node it looks for a virtual
(kernel driver vgem) device, which unfortunately does not create a
render node in mainline kernel (there are patches in ChromiumOS).
For this the Udev wrapper is extended to search for renderNode devices
and for virtual dri devices.
If either render node or vgem dri device is found, it is tried to be
opened (without logind escalation) and on success a gbm device is
created on it. If any step of this fails the so far default behavior
of default device is tried for creating the EGLDisplay.
All of this is compile optional, so that the virtual platform does not
hard depend on udev and/or gbm.
Test Plan:
Auto tests which need OpenGL executed and verified that they
use the render node or vgem device.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2216
Introduces a new (optional) dependency: libdrm.
The DrmBackend currently supports finding the first connected output.
It can create shared memory buffers which are used by SceneQPainter to
do double buffered rendering.
There is still lots to do, the following things are not yet working:
* multiple outputs
* page flip
* OpenGL (through gbm)
* restoring mode setting to start value
