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) .. _V4L2-SDR-FMT-PCU18BE:
^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) V4L2_SDR_FMT_PCU18BE ('PC18')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) ******************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) Planar complex unsigned 18-bit big endian IQ sample
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) Description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) ===========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) This format contains a sequence of complex number samples. Each complex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) number consist of two parts called In-phase and Quadrature (IQ). Both I
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) and Q are represented as a 18 bit unsigned big endian number stored in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 32 bit space. The remaining unused bits within the 32 bit space will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) padded with 0. I value starts first and Q value starts at an offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) equalling half of the buffer size (i.e.) offset = buffersize/2. Out of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) the 18 bits, bit 17:2 (16 bit) is data and bit 1:0 (2 bit) can be any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) **Byte Order.**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) Each cell is one byte.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) .. flat-table::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)     :header-rows:  1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)     :stub-columns: 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)     * -  Offset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)       -  Byte B0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)       -  Byte B1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)       -  Byte B2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)       -  Byte B3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)     * -  start + 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)       -  I'\ :sub:`0[17:10]`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)       -  I'\ :sub:`0[9:2]`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)       -  I'\ :sub:`0[1:0]; B2[5:0]=pad`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)       -  pad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)     * -  start + 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)       -  I'\ :sub:`1[17:10]`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)       -  I'\ :sub:`1[9:2]`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)       -  I'\ :sub:`1[1:0]; B2[5:0]=pad`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)       -  pad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)     * -  ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)     * - start + offset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)       -  Q'\ :sub:`0[17:10]`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)       -  Q'\ :sub:`0[9:2]`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)       -  Q'\ :sub:`0[1:0]; B2[5:0]=pad`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)       -  pad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)     * - start + offset + 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)       -  Q'\ :sub:`1[17:10]`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)       -  Q'\ :sub:`1[9:2]`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)       -  Q'\ :sub:`1[1:0]; B2[5:0]=pad`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)       -  pad