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diff --git a/target/linux/bcm27xx/patches-5.4/950-0502-media-pixfmt-Document-the-HEVC-slice-pixel-format.patch b/target/linux/bcm27xx/patches-5.4/950-0502-media-pixfmt-Document-the-HEVC-slice-pixel-format.patch
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index 0000000000..7398807782
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+++ b/target/linux/bcm27xx/patches-5.4/950-0502-media-pixfmt-Document-the-HEVC-slice-pixel-format.patch
@@ -0,0 +1,50 @@
+From 662256810630f6ac6d06ee0cdc5f4660b25f7e98 Mon Sep 17 00:00:00 2001
+From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+Date: Tue, 22 Oct 2019 12:26:53 -0300
+Subject: [PATCH] media: pixfmt: Document the HEVC slice pixel format
+
+Commit de06f289283298e2938445019999cec46435375c upstream.
+
+Document the current state of the HEVC slice pixel format.
+The format will need to evolve in the future, which is why it is
+not part of the public API.
+
+Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
+---
+ .../media/uapi/v4l/pixfmt-compressed.rst | 23 +++++++++++++++++++
+ 1 file changed, 23 insertions(+)
+
+--- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
++++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
+@@ -188,6 +188,29 @@ Compressed Formats
+ If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
+ then the decoder has no requirements since it can parse all the
+ information from the raw bytestream.
++ * .. _V4L2-PIX-FMT-HEVC-SLICE:
++
++ - ``V4L2_PIX_FMT_HEVC_SLICE``
++ - 'S265'
++ - HEVC parsed slice data, as extracted from the HEVC bitstream.
++ This format is adapted for stateless video decoders that implement a
++ HEVC pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
++ This pixelformat has two modifiers that must be set at least once
++ through the ``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE``
++ and ``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE`` controls.
++ Metadata associated with the frame to decode is required to be passed
++ through the following controls :
++ * ``V4L2_CID_MPEG_VIDEO_HEVC_SPS``
++ * ``V4L2_CID_MPEG_VIDEO_HEVC_PPS``
++ * ``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS``
++ See the :ref:`associated Codec Control IDs <v4l2-mpeg-hevc>`.
++ Buffers associated with this pixel format must contain the appropriate
++ number of macroblocks to decode a full corresponding frame.
++
++ .. note::
++
++ This format is not yet part of the public kernel API and it
++ is expected to change.
+ * .. _V4L2-PIX-FMT-FWHT:
+
+ - ``V4L2_PIX_FMT_FWHT``