Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 71 insertions, 0 deletions

diff --git a/Documentation/userspace-api/media/v4l/pixfmt-m420.rst b/Documentation/userspace-api/media/v4l/pixfmt-m420.rst
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+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-M420:
+
+**************************
+V4L2_PIX_FMT_M420 ('M420')
+**************************
+
+Format with ½ horizontal and vertical chroma resolution, also known as
+YUV 4:2:0. Hybrid plane line-interleaved layout.
+
+
+Description
+===========
+
+M420 is a YUV format with ½ horizontal and vertical chroma subsampling
+(YUV 4:2:0). Pixels are organized as interleaved luma and chroma planes.
+Two lines of luma data are followed by one line of chroma data.
+
+The luma plane has one byte per pixel. The chroma plane contains
+interleaved CbCr pixels subsampled by ½ in the horizontal and vertical
+directions. Each CbCr pair belongs to four pixels. For example,
+Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`,
+Y'\ :sub:`10`, Y'\ :sub:`11`.
+
+All line lengths are identical: if the Y lines include pad bytes so do
+the CbCr lines.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+    * - start + 16:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 20:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 24:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+
+
+**Color Sample Location:**
+Chroma samples are :ref:`interstitially sited<yuv-chroma-centered>`
+horizontally and vertically.