diff options
| -rw-r--r-- | src/platformsupport/kmsconvenience/qkmsdevice.cpp | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/src/platformsupport/kmsconvenience/qkmsdevice.cpp b/src/platformsupport/kmsconvenience/qkmsdevice.cpp index 6121faf362..263c02682d 100644 --- a/src/platformsupport/kmsconvenience/qkmsdevice.cpp +++ b/src/platformsupport/kmsconvenience/qkmsdevice.cpp @@ -490,8 +490,30 @@ QPlatformScreen *QKmsDevice::createScreenForConnector(drmModeResPtr resources, } } - if (output.eglfs_plane) - qCDebug(qLcKmsDebug, "Output eglfs plane is: %d", output.eglfs_plane->id); + // A more useful version: allows specifying "crtc_id,plane_id:crtc_id,plane_id:..." + // in order to allow overriding the plane used for a given crtc. + if (qEnvironmentVariableIsSet("QT_QPA_EGLFS_KMS_PLANES_FOR_CRTCS")) { + const QString val = qEnvironmentVariable("QT_QPA_EGLFS_KMS_PLANES_FOR_CRTCS"); + qCDebug(qLcKmsDebug, "crtc_id:plane_id override list: %s", qPrintable(val)); + const QStringList crtcPlanePairs = val.split(QLatin1Char(':')); + for (const QString &crtcPlanePair : crtcPlanePairs) { + const QStringList values = crtcPlanePair.split(QLatin1Char(',')); + if (values.count() == 2 && uint(values[0].toInt()) == output.crtc_id) { + uint planeId = values[1].toInt(); + for (const QKmsPlane &kmsplane : qAsConst(m_planes)) { + if (kmsplane.id == planeId) { + output.eglfs_plane = (QKmsPlane*)&kmsplane; + break; + } + } + } + } + } + + if (output.eglfs_plane) { + qCDebug(qLcKmsDebug, "Chose plane %u for output %s (crtc id %u) (may not be applicable)", + output.eglfs_plane->id, connectorName.constData(), output.crtc_id); + } m_crtc_allocator |= (1 << output.crtc_index); |