Hi Ramesh,
Thank you for the patch.
On Tuesday 07 Feb 2017 15:02:35 Ramesh Shanmugasundaram wrote:
> This patch adds documentation for the three new SDR formats
>
> V4L2_SDR_FMT_PCU16BE
> V4L2_SDR_FMT_PCU18BE
> V4L2_SDR_FMT_PCU20BE
>
> Signed-off-by: Ramesh Shanmugasundaram
> <ramesh.shanmugasundaram@xxxxxxxxxxxxxx> ---
> .../media/uapi/v4l/pixfmt-sdr-pcu16be.rst | 55 +++++++++++++++++++
> .../media/uapi/v4l/pixfmt-sdr-pcu18be.rst | 55 +++++++++++++++++++
> .../media/uapi/v4l/pixfmt-sdr-pcu20be.rst | 54 +++++++++++++++++++
> Documentation/media/uapi/v4l/sdr-formats.rst | 3 ++
> 4 files changed, 167 insertions(+)
> create mode 100644 Documentation/media/uapi/v4l/pixfmt-sdr-pcu16be.rst
> create mode 100644 Documentation/media/uapi/v4l/pixfmt-sdr-pcu18be.rst
> create mode 100644 Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst
>
> diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu16be.rst
> b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu16be.rst new file mode 100644
> index 0000000..2de1b1a
> --- /dev/null
> +++ b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu16be.rst
> @@ -0,0 +1,55 @@
> +.. -*- coding: utf-8; mode: rst -*-
> +
> +.. _V4L2-SDR-FMT-PCU16BE:
> +
> +******************************
> +V4L2_SDR_FMT_PCU16BE ('PC16')
> +******************************
> +
> +Planar complex unsigned 16-bit big endian IQ sample
> +
> +Description
> +===========
> +
> +This format contains a sequence of complex number samples. Each complex
> +number consist of two parts called In-phase and Quadrature (IQ). Both I
> +and Q are represented as a 16 bit unsigned big endian number stored in
> +32 bit space. The remaining unused bits within the 32 bit space will be
> +padded with 0. I value starts first and Q value starts at an offset
> +equalling half of the buffer size (i.e.) offset = buffersize/2. Out of
> +the 16 bits, bit 15:2 (14 bit) is data and bit 1:0 (2 bit) can be any
> +value.
This sounds very strange to me. Are the two lower bits always random ? What is
that used for ?
> +**Byte Order.**
> +Each cell is one byte.
> +
> +.. flat-table::
> + :header-rows: 1
> + :stub-columns: 0
> +
> + * - Offset:
> + - Byte B0
> + - Byte B1
> + - Byte B2
> + - Byte B3
> + * - start + 0:
> + - I'\ :sub:`0[13:6]`
> + - I'\ :sub:`0[5:0]; B1[1:0]=pad`
> + - pad
> + - pad
> + * - start + 4:
> + - I'\ :sub:`1[13:6]`
> + - I'\ :sub:`1[5:0]; B1[1:0]=pad`
> + - pad
> + - pad
> + * - ...
> + * - start + offset:
> + - Q'\ :sub:`0[13:6]`
> + - Q'\ :sub:`0[5:0]; B1[1:0]=pad`
> + - pad
> + - pad
> + * - start + offset + 4:
> + - Q'\ :sub:`1[13:6]`
> + - Q'\ :sub:`1[5:0]; B1[1:0]=pad`
> + - pad
> + - pad
> diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu18be.rst
> b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu18be.rst new file mode 100644
> index 0000000..da8b26b
> --- /dev/null
> +++ b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu18be.rst
> @@ -0,0 +1,55 @@
> +.. -*- coding: utf-8; mode: rst -*-
> +
> +.. _V4L2-SDR-FMT-PCU18BE:
> +
> +******************************
> +V4L2_SDR_FMT_PCU18BE ('PC18')
> +******************************
> +
> +Planar complex unsigned 18-bit big endian IQ sample
> +
> +Description
> +===========
> +
> +This format contains a sequence of complex number samples. Each complex
> +number consist of two parts called In-phase and Quadrature (IQ). Both I
> +and Q are represented as a 18 bit unsigned big endian number stored in
> +32 bit space. The remaining unused bits within the 32 bit space will be
> +padded with 0. I value starts first and Q value starts at an offset
> +equalling half of the buffer size (i.e.) offset = buffersize/2. Out of
> +the 18 bits, bit 17:2 (16 bit) is data and bit 1:0 (2 bit) can be any
> +value.
> +
> +**Byte Order.**
> +Each cell is one byte.
> +
> +.. flat-table::
> + :header-rows: 1
> + :stub-columns: 0
> +
> + * - Offset:
> + - Byte B0
> + - Byte B1
> + - Byte B2
> + - Byte B3
> + * - start + 0:
> + - I'\ :sub:`0[17:10]`
> + - I'\ :sub:`0[9:2]`
> + - I'\ :sub:`0[1:0]; B2[5:0]=pad`
> + - pad
> + * - start + 4:
> + - I'\ :sub:`1[17:10]`
> + - I'\ :sub:`1[9:2]`
> + - I'\ :sub:`1[1:0]; B2[5:0]=pad`
> + - pad
> + * - ...
> + * - start + offset:
> + - Q'\ :sub:`0[17:10]`
> + - Q'\ :sub:`0[9:2]`
> + - Q'\ :sub:`0[1:0]; B2[5:0]=pad`
> + - pad
> + * - start + offset + 4:
> + - Q'\ :sub:`1[17:10]`
> + - Q'\ :sub:`1[9:2]`
> + - Q'\ :sub:`1[1:0]; B2[5:0]=pad`
> + - pad
> diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst
> b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst new file mode 100644
> index 0000000..5499eed
> --- /dev/null
> +++ b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst
> @@ -0,0 +1,54 @@
> +.. -*- coding: utf-8; mode: rst -*-
> +.. _V4L2-SDR-FMT-PCU20BE:
> +
> +******************************
> +V4L2_SDR_FMT_PCU20BE ('PC20')
> +******************************
> +
> +Planar complex unsigned 20-bit big endian IQ sample
> +
> +Description
> +===========
> +
> +This format contains a sequence of complex number samples. Each complex
> +number consist of two parts called In-phase and Quadrature (IQ). Both I
> +and Q are represented as a 20 bit unsigned big endian number stored in
> +32 bit space. The remaining unused bits within the 32 bit space will be
> +padded with 0. I value starts first and Q value starts at an offset
> +equalling half of the buffer size (i.e.) offset = buffersize/2. Out of
> +the 20 bits, bit 19:2 (18 bit) is data and bit 1:0 (2 bit) can be any
> +value.
> +
> +**Byte Order.**
> +Each cell is one byte.
> +
> +.. flat-table::
> + :header-rows: 1
> + :stub-columns: 0
> +
> + * - Offset:
> + - Byte B0
> + - Byte B1
> + - Byte B2
> + - Byte B3
> + * - start + 0:
> + - I'\ :sub:`0[19:12]`
> + - I'\ :sub:`0[11:4]`
> + - I'\ :sub:`0[3:0]; B2[3:0]=pad`
> + - pad
> + * - start + 4:
> + - I'\ :sub:`1[19:12]`
> + - I'\ :sub:`1[11:4]`
> + - I'\ :sub:`1[3:0]; B2[3:0]=pad`
> + - pad
> + * - ...
> + * - start + offset:
> + - Q'\ :sub:`0[19:12]`
> + - Q'\ :sub:`0[11:4]`
> + - Q'\ :sub:`0[3:0]; B2[3:0]=pad`
> + - pad
> + * - start + offset + 4:
> + - Q'\ :sub:`1[19:12]`
> + - Q'\ :sub:`1[11:4]`
> + - Q'\ :sub:`1[3:0]; B2[3:0]=pad`
> + - pad
> diff --git a/Documentation/media/uapi/v4l/sdr-formats.rst
> b/Documentation/media/uapi/v4l/sdr-formats.rst index f863c08..2037f5b
> 100644
> --- a/Documentation/media/uapi/v4l/sdr-formats.rst
> +++ b/Documentation/media/uapi/v4l/sdr-formats.rst
> @@ -17,3 +17,6 @@ These formats are used for :ref:`SDR <sdr>` interface
> only. pixfmt-sdr-cs08
> pixfmt-sdr-cs14le
> pixfmt-sdr-ru12le
> + pixfmt-sdr-pcu16be
> + pixfmt-sdr-pcu18be
> + pixfmt-sdr-pcu20be
--
Regards,
Laurent Pinchart
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