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These patches were generated from: https://github.com/raspberrypi/linux/commits/rpi-6.12.y With the following command: git format-patch -N v6.12.27..HEAD (HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e) Exceptions: - (def)configs patches - github workflows patches - applied & reverted patches - readme patches - wireless patches Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
66 lines
2.5 KiB
Diff
66 lines
2.5 KiB
Diff
From 2d9daa6da5375aee818d4294818a38be415a5e82 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 6 Feb 2025 18:02:34 +0000
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Subject: [PATCH] docs: uapi: media: Document Raspberry Pi NV12 column format
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The Raspberry Pi HEVC decoder uses a tiled format based on
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columns for 8 and 10 bit YUV images, so document them as
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NV12MT_COL128 and NV12MT_10_COL128.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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.../media/v4l/pixfmt-yuv-planar.rst | 42 +++++++++++++++++++
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1 file changed, 42 insertions(+)
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--- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
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+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
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@@ -827,6 +827,48 @@ Data in the 12 high bits, zeros in the 4
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- Cb\ :sub:`11`
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- Cr\ :sub:`11`
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+V4L2_PIX_FMT_NV12MT_COL128 and V4L2_PIX_FMT_NV12MT_10_COL128
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+------------------------------------------------------------
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+
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+``V4L2_PIX_FMT_NV12MT_COL128`` is a tiled version of
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+``V4L2_PIX_FMT_NV12M`` where the two planes are split into 128 byte wide columns
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+of Y or interleaved CbCr.
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+
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+V4L2_PIX_FMT_NV12MT_10_COL128 expands that as a 10 bit format where 3 10 bit
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+values are packed into a 32bit word. A 128 byte wide column therefore holds 96
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+samples (either Y or interleaved CrCb). That effectively makes it 6 values in a
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+64 bit word for the CbCr plane, as the values always go in pairs.
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+
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+Bit-packed representation.
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+
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+.. tabularcolumns:: |p{1.2cm}||p{1.2cm}||p{1.2cm}||p{1.2cm}|p{3.2cm}|p{3.2cm}|
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+
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+.. flat-table::
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+ :header-rows: 0
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+ :stub-columns: 0
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+ :widths: 8 8 8 8
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+
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+ * - Y'\ :sub:`00[7:0]`
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+ - Y'\ :sub:`01[5:0] (bits 7--2)` Y'\ :sub:`00[9:8]`\ (bits 1--0)
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+ - Y'\ :sub:`02[3:0] (bits 7--4)` Y'\ :sub:`01[9:6]`\ (bits 3--0)
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+ - unused (bits 7--6)` Y'\ :sub:`02[9:4]`\ (bits 5--0)
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+
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+.. tabularcolumns:: |p{1.2cm}||p{1.2cm}||p{1.2cm}||p{1.2cm}|p{3.2cm}|p{3.2cm}|
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+
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+.. flat-table::
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+ :header-rows: 0
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+ :stub-columns: 0
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+ :widths: 12 12 12 12 12 12 12 12
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+
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+ * - Cb\ :sub:`00[7:0]`
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+ - Cr\ :sub:`00[5:0]`\ (bits 7--2) Cb\ :sub:`00[9:8]`\ (bits 1--0)
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+ - Cb\ :sub:`01[3:0]`\ (bits 7--4) Cr\ :sub:`00[9:6]`\ (bits 3--0)
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+ - unused (bits 7--6) Cb\ :sub:`02[9:4]`\ (bits 5--0)
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+ - Cr\ :sub:`01[7:0]`
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+ - Cb\ :sub:`02[5:0]`\ (bits 7--2) Cr\ :sub:`01[9:8]`\ (bits 1--0)
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+ - Cr\ :sub:`02[3:0]`\ (bits 7--4) Cb\ :sub:`02[9:6]`\ (bits 3--0)
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+ - unused (bits 7--6) Cr\ :sub:`02[9:4]`\ (bits 5--0)
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+
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Fully Planar YUV Formats
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========================
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