Hi, The recent removal of DMX_SET_SOURCE https://github.com/torvalds/linux/commit/13adefbe9e566c6db91579e4ce17f1e5193d6f2c and earlier removal of the set_source callback https://github.com/torvalds/linux/commit/1e92bbe08ad9fc0d5ec05174c176a9bc54921733 leads to the question how the situation of having multiple frontends on a single dvb adapter should be handled nowadays. Suppose the routing is flexible, any demux could be sourced by any frontend. In the past, this has been achieved by using the set_source callback, allowing userspace to configure the routing by using the DMX_SET_SOURCE ioctl. The connect_frontend / disconnect_frontend callbacks are currently only called for the memory frontend, so it seems no longer possible to select hardware frontends. How do you guys see this, what does the standard dictate in this case? Should we assume a 1:1 mapping between frontendN:demuxN and forbid dynamic routing? Or am I overlooking something? In my opinion, supporting dynamic routing would be an advantage. Especially when the number of (hardware) demuxes is smaller than the number of (hardware) frontends. Regards, Pieter