Hi all, Some receiver devices requires explicit support for transitioning transmitters to LP-11 or LP-111 state before starting streaming. As there's currently a single operation (s_stream()) callback to do that, there's no way for the receiver driver to differentiate between the two things. This set adds two more callbacks, pre_streamon and post_streamon, to do exactly that. The usage on CSI-2 is to set the transmitter state to LP-11 or LP-111 (depending on the PHY) and thus allow reliable receiver initialisation. The set also adds support for this in the CCS driver. Sakari Ailus (3): Documentation: v4l: Rework LP-11 documentation, add callbacks v4l: subdev: Add pre_streamon and post_streamoff callbacks ccs: Implement support for manual LP control Documentation/driver-api/media/tx-rx.rst | 40 ++++++++++++++------- drivers/media/i2c/ccs/ccs-core.c | 45 ++++++++++++++++++++++++ include/media/v4l2-subdev.h | 25 +++++++++++++ 3 files changed, 98 insertions(+), 12 deletions(-) -- 2.30.2
