Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) .. _common:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) ###################
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) Common API Elements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) ###################
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) Programming a V4L2 device consists of these steps:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) -  Opening the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) -  Changing device properties, selecting a video and audio input, video
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)    standard, picture brightness a. o.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) -  Negotiating a data format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) -  Negotiating an input/output method
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) -  The actual input/output loop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) -  Closing the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) In practice most steps are optional and can be executed out of order. It
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) depends on the V4L2 device type, you can read about the details in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) :ref:`devices`. In this chapter we will discuss the basic concepts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) applicable to all devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .. toctree::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)     :maxdepth: 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)     open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)     querycap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)     app-pri
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)     video
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)     audio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)     tuner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)     standard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)     dv-timings
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)     control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)     extended-controls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)     ext-ctrls-camera
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)     ext-ctrls-flash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)     ext-ctrls-image-source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)     ext-ctrls-image-process
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)     ext-ctrls-codec
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)     ext-ctrls-jpeg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)     ext-ctrls-dv
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)     ext-ctrls-rf-tuner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)     ext-ctrls-fm-tx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)     ext-ctrls-fm-rx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)     ext-ctrls-detect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)     ext-ctrls-colorimetry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)     fourcc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)     format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)     planar-apis
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)     selection-api
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)     crop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)     streaming-par