atomisp staging driver changes for 6.8

- Remove more dead / unwanted code
- Changes to make the atomisp driver work with libcamera,
  this has been tested with libcamera's simple pipelinehandler
  together with an ov2680 sensor
media: atomisp: Implement link_setup() op for ISP subdev MC entity

The atomisp driver's Android heritage makes it weird in that
even though it uses MC + subdev-s it is designed to primarily
be controlled through its /dev/video# node.

It implements s_input() on /dev/video# to select which sensor to use,
while ignoring link_setup() calls to enable a link to another sensor.

Add support for selecting the active sensor the MC way by adding
link_setup() support.

The implementation is a bit convoluted due to the atomisp driver's

Reviewed-by: Andy Shevchenko <>
Signed-off-by: Hans de Goede <>
1 file changed