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    SubjectRe: [PATCH v4 14/36] [media] v4l2-mc: add a function to inherit controls from a pipeline
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    On Fri, 2017-03-17 at 10:24 -0300, Mauro Carvalho Chehab wrote:
    [...]
    > The big question, waiting for an answer on the last 8 years is
    > who would do that? Such person would need to have several different
    > hardware from different vendors, in order to ensure that it has
    > a generic solution.
    >
    > It is a way more feasible that the Kernel developers that already
    > have a certain hardware on their hands to add support inside the
    > driver to forward the controls through the pipeline and to setup
    > a "default" pipeline that would cover the common use cases at
    > driver's probe.

    Actually, would setting pipeline via libv4l2 plugin and letting drivers
    provide a sane enabled default pipeline configuration be mutually
    exclusive? Not sure about the control forwarding, but at least a simple
    link setup and format forwarding would also be possible in the kernel
    without hindering userspace from doing it themselves later.

    regards
    Philipp

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