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eglfs/kms: Add drm atomic blend_op property handling

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Add support for specifying the blend operation used when alpha-
blending KMS planes. Only available with atomic modesetting.
Set the environment variable QT_QPA_EGLFS_KMS_BLEND_OP to
the enum value of the 'blend_op' property.

Task-number: QTBUG-75659
Change-Id: If0ef5ba314b88adb530113b608d20fc9c027c5ec
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
This commit is contained in:
Paul Olav Tvete 2019-08-20 10:12:53 +02:00
parent 8d302aea33
commit 181e5382e7
3 changed files with 6 additions and 0 deletions
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2
src/platformsupport/kmsconvenience/qkmsdevice.cpp
View File

@ -854,6 +854,8 @@ void QKmsDevice::discoverPlanes()
plane.crtcYPropertyId = prop->prop_id;
} else if (!strcasecmp(prop->name, "zpos")) {
plane.zposPropertyId = prop->prop_id;
} else if (!strcasecmp(prop->name, "blend_op")) {
plane.blendOpPropertyId = prop->prop_id;
}
});

1
src/platformsupport/kmsconvenience/qkmsdevice_p.h
View File

@ -178,6 +178,7 @@ struct QKmsPlane
uint32_t crtcwidthPropertyId = 0;
uint32_t crtcheightPropertyId = 0;
uint32_t zposPropertyId = 0;
uint32_t blendOpPropertyId = 0;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QKmsPlane::Rotations)

3
src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmscreen.cpp
View File

@ -331,6 +331,9 @@ void QEglFSKmsGbmScreen::flip()
static int zpos = qEnvironmentVariableIntValue("QT_QPA_EGLFS_KMS_ZPOS");
if (zpos)
drmModeAtomicAddProperty(request, op.eglfs_plane->id, op.eglfs_plane->zposPropertyId, zpos);
static uint blendOp = uint(qEnvironmentVariableIntValue("QT_QPA_EGLFS_KMS_BLEND_OP"));
if (blendOp)
drmModeAtomicAddProperty(request, op.eglfs_plane->id, op.eglfs_plane->blendOpPropertyId, blendOp);
}
#endif
} else {