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backends/drm: fix KWIN_DRM_NO_AMS env var

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It currently makes the session not start at all
This commit is contained in:
Xaver Hugl 2021-11-29 11:54:46 +01:00
parent e5ca5df0c5
commit 15993fa6bb
1 changed files with 8 additions and 8 deletions
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14
src/backends/drm/drm_gpu.cpp
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@ -83,11 +83,7 @@ DrmGpu::DrmGpu(DrmBackend *backend, const QString &devNode, int fd, dev_t device
m_socketNotifier = new QSocketNotifier(fd, QSocketNotifier::Read, this);
connect(m_socketNotifier, &QSocketNotifier::activated, this, &DrmGpu::dispatchEvents);
// trying to activate Atomic Mode Setting (this means also Universal Planes)
static const bool atomicModesetting = !qEnvironmentVariableIsSet("KWIN_DRM_NO_AMS");
if (atomicModesetting) {
initDrmResources();
}
m_leaseDevice = new KWaylandServer::DrmLeaseDeviceV1Interface(waylandServer()->display(), [this]{
char *path = drmGetDeviceNameFromFd2(m_fd);
@ -152,7 +148,13 @@ clockid_t DrmGpu::presentationClock() const
void DrmGpu::initDrmResources()
{
// try atomic mode setting
if (drmSetClientCap(m_fd, DRM_CLIENT_CAP_ATOMIC, 1) == 0) {
bool tmp = false;
bool noAMS = qEnvironmentVariableIntValue("KWIN_DRM_NO_AMS", &tmp) != 0 && tmp;
if (noAMS) {
qCWarning(KWIN_DRM) << "Atomic Mode Setting requested off via environment variable. Using legacy mode on GPU" << m_devNode;
} else if(drmSetClientCap(m_fd, DRM_CLIENT_CAP_ATOMIC, 1) != 0) {
qCWarning(KWIN_DRM) << "drmSetClientCap for Atomic Mode Setting failed. Using legacy mode on GPU" << m_devNode;
} else {
DrmScopedPointer<drmModePlaneRes> planeResources(drmModeGetPlaneResources(m_fd));
if (planeResources) {
qCDebug(KWIN_DRM) << "Using Atomic Mode Setting on gpu" << m_devNode;
@ -174,8 +176,6 @@ void DrmGpu::initDrmResources()
} else {
qCWarning(KWIN_DRM) << "Failed to get plane resources. Falling back to legacy mode on GPU " << m_devNode;
}
} else {
qCWarning(KWIN_DRM) << "drmSetClientCap for Atomic Mode Setting failed. Using legacy mode on GPU" << m_devNode;
}
m_atomicModeSetting = !m_planes.isEmpty();