[PATCH 0/3] Explicit CSI-2 LP-11 / LP-111 support

[Sakari Ailus <sakari.ailus@linux.intel.com>]

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