From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A87BC3C0607; Tue, 28 Apr 2026 20:09:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777406953; cv=none; b=sJPMSyWYDG3cGlYPqijOCzMRHyiZR6cBhNzynxiKbLxtILOoUcqq19pDUP2fYrT2N0nfkMXpE8tBRXXzpwBSOydH9gIMsW+U7+MASktskTO6BHb0MOu/RLvJ07S5jl6waVcPdEvyivhBSibTkbbTwvwjkk2qcQx/x4wQBsIDP7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777406953; c=relaxed/simple; bh=4HQjgyu5KxB/zFAhYUh/hXr2rWKh7ek2AMPsY5XxvXI=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=R4+G7ti0xf7lmY6FY1mF1404IUlQkyTD+Ul7bE7axARiUU5NBhbpJhlF2+eptQ97uIH4k2ZYlX1M9J9YWxMHbMceDkWkhHZ9XMBak5KCHrU2/5fU7MUXHm7uCjDUbNTRLusKnUiFCbTaNVCu5i45Phr/Wwj8nSRkRcCYndPxhSg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=ZGs2m1nI; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="ZGs2m1nI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1777406949; bh=4HQjgyu5KxB/zFAhYUh/hXr2rWKh7ek2AMPsY5XxvXI=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=ZGs2m1nIR8KVifEa1X2O9Zxm1hHTAJdzHQ2Q38bfB7mbQvjhhR13/D9tD1sY4f7Jv mIA5mA0ygj3TNZ1g+FM4DBT4UGcfNOhoBqzLcvTMaXDTLCum8jlUdZDudu3akpiwkJ Uejr+gm+sDU8LGV5K7zGWLKOWCRzNL3SzQ2YwAifXmOOpTRzlRCHFmBroDT6+0U95k e9IUYZhM/3tZVrlRubph5kxWeJAGYGaZ2iU/Qwx3b30Kxa8AAWiFxfA2bFzBAV7noF OIEd5ZwDlStLHxB5IiNHC53yrJX5II8Y9qmUxIfq/bekmxjqT7pIBSnWCome9rO9yb /+QOAMkuBP7+w== Received: from [100.64.0.214] (unknown [100.64.0.214]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits)) (No client certificate requested) (Authenticated sender: nicolas) by bali.collaboradmins.com (Postfix) with ESMTPSA id B4AEE17E1513; Tue, 28 Apr 2026 22:09:07 +0200 (CEST) Message-ID: <7e7bccd3553444c0ebda80685f46a366e8bf49ad.camel@collabora.com> Subject: Re: [PATCH v6 2/6] docs: uapi: media: Document Raspberry Pi NV12 column format From: Nicolas Dufresne To: Dave Stevenson , Sakari Ailus , Laurent Pinchart , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Broadcom internal kernel review list , John Cox , Dom Cobley , review list , Ezequiel Garcia Cc: John Cox , Stefan Wahren , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org Date: Tue, 28 Apr 2026 16:09:06 -0400 In-Reply-To: <20260304-media-rpi-hevc-dec-v6-2-93868ae6dff8@raspberrypi.com> References: <20260304-media-rpi-hevc-dec-v6-0-93868ae6dff8@raspberrypi.com> <20260304-media-rpi-hevc-dec-v6-2-93868ae6dff8@raspberrypi.com> Autocrypt: addr=nicolas.dufresne@collabora.com; prefer-encrypt=mutual; keydata=mDMEaCN2ixYJKwYBBAHaRw8BAQdAM0EHepTful3JOIzcPv6ekHOenE1u0vDG1gdHFrChD /e0J05pY29sYXMgRHVmcmVzbmUgPG5pY29sYXNAbmR1ZnJlc25lLmNhPoicBBMWCgBEAhsDBQsJCA cCAiICBhUKCQgLAgQWAgMBAh4HAheABQkJZfd1FiEE7w1SgRXEw8IaBG8S2UGUUSlgcvQFAmibrjo CGQEACgkQ2UGUUSlgcvQlQwD/RjpU1SZYcKG6pnfnQ8ivgtTkGDRUJ8gP3fK7+XUjRNIA/iXfhXMN abIWxO2oCXKf3TdD7aQ4070KO6zSxIcxgNQFtDFOaWNvbGFzIER1ZnJlc25lIDxuaWNvbGFzLmR1Z nJlc25lQGNvbGxhYm9yYS5jb20+iJkEExYKAEECGwMFCwkIBwICIgIGFQoJCAsCBBYCAwECHgcCF4 AWIQTvDVKBFcTDwhoEbxLZQZRRKWBy9AUCaCyyxgUJCWX3dQAKCRDZQZRRKWBy9ARJAP96pFmLffZ smBUpkyVBfFAf+zq6BJt769R0al3kHvUKdgD9G7KAHuioxD2v6SX7idpIazjzx8b8rfzwTWyOQWHC AAS0LU5pY29sYXMgRHVmcmVzbmUgPG5pY29sYXMuZHVmcmVzbmVAZ21haWwuY29tPoiZBBMWCgBBF iEE7w1SgRXEw8IaBG8S2UGUUSlgcvQFAmibrGYCGwMFCQll93UFCwkIBwICIgIGFQoJCAsCBBYCAw ECHgcCF4AACgkQ2UGUUSlgcvRObgD/YnQjfi4+L8f4fI7p1pPMTwRTcaRdy6aqkKEmKsCArzQBAK8 bRLv9QjuqsE6oQZra/RB4widZPvphs78H0P6NmpIJ Organization: Collabora Canada Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="=-7Ch6iLaTw0XauR+6FJtM" User-Agent: Evolution 3.58.3 (3.58.3-1.fc43) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 --=-7Ch6iLaTw0XauR+6FJtM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Le mercredi 04 mars 2026 =C3=A0 14:05 +0000, Dave Stevenson a =C3=A9crit=C2= =A0: > The Raspberry Pi HEVC decoder uses a tiled format based on > columns for 8 and 10 bit YUV images, so document them as > NV12MT_COL128 and NV12MT_10_COL128. >=20 > Signed-off-by: Dave Stevenson Reviewed-by: Nicolas Dufresne > --- > =C2=A0.../userspace-api/media/v4l/pixfmt-yuv-planar.rst=C2=A0 | 46 ++++++= ++++++++++++++++ > =C2=A01 file changed, 46 insertions(+) >=20 > diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst = b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst > index 0631919bd667..1aa4182b8adc 100644 > --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst > +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst > @@ -957,6 +957,52 @@ Data in the 12 high bits, zeros in the 4 low bits, a= rranged in little endian ord > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - Cr\ :sub:`11` > =C2=A0 > =C2=A0 > +.. _V4L2-PIX-FMT-NV12MT-COL128: > +.. _V4L2-PIX-FMT-NV12MT-10-COL128: > + > +NV12MT_COL128 and NV12MT_10_COL128 > +---------------------------------- > + > +``V4L2_PIX_FMT_NV12MT_COL128`` is a tiled version of > +``V4L2_PIX_FMT_NV12M`` where the two planes are split into 128 byte wide= columns > +of Y or interleaved CbCr. The height is always aligned to a multiple of = 8 lines. > + > +V4L2_PIX_FMT_NV12MT_10_COL128 expands that as a 10 bit format where 3 10= bit > +values are packed into a 32bit word. A 128 byte wide column therefore ho= lds 96 > +samples (either Y or interleaved CrCb). That effectively makes it 6 valu= es in a > +64 bit word for the CbCr plane, as the values always go in pairs. > + > +Bit-packed representation. > + > +.. tabularcolumns:: |p{1.2cm}||p{1.2cm}||p{1.2cm}||p{1.2cm}|p{3.2cm}|p{3= .2cm}| > + > +.. flat-table:: > +=C2=A0=C2=A0=C2=A0 :header-rows:=C2=A0 0 > +=C2=A0=C2=A0=C2=A0 :stub-columns: 0 > +=C2=A0=C2=A0=C2=A0 :widths: 8 8 8 8 > + > +=C2=A0=C2=A0=C2=A0 * - Y'\ :sub:`00[7:0]` > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - Y'\ :sub:`01[5:0] (bits 7--2)` Y'\ :sub= :`00[9:8]`\ (bits 1--0) > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - Y'\ :sub:`02[3:0] (bits 7--4)` Y'\ :sub= :`01[9:6]`\ (bits 3--0) > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - unused (bits 7--6)` Y'\ :sub:`02[9:4]`\= (bits 5--0) > + > +.. tabularcolumns:: |p{1.2cm}||p{1.2cm}||p{1.2cm}||p{1.2cm}|p{3.2cm}|p{3= .2cm}| > + > +.. flat-table:: > +=C2=A0=C2=A0=C2=A0 :header-rows:=C2=A0 0 > +=C2=A0=C2=A0=C2=A0 :stub-columns: 0 > +=C2=A0=C2=A0=C2=A0 :widths: 12 12 12 12 12 12 12 12 > + > +=C2=A0=C2=A0=C2=A0 * - Cb\ :sub:`00[7:0]` > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - Cr\ :sub:`00[5:0]`\ (bits 7--2) Cb\ :su= b:`00[9:8]`\ (bits 1--0) > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - Cb\ :sub:`01[3:0]`\ (bits 7--4) Cr\ :su= b:`00[9:6]`\ (bits 3--0) > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - unused (bits 7--6) Cb\ :sub:`02[9:4]`\ = (bits 5--0) > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - Cr\ :sub:`01[7:0]` > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - Cb\ :sub:`02[5:0]`\ (bits 7--2) Cr\ :su= b:`01[9:8]`\ (bits 1--0) > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - Cr\ :sub:`02[3:0]`\ (bits 7--4) Cb\ :su= b:`02[9:6]`\ (bits 3--0) > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 - unused (bits 7--6) Cr\ :sub:`02[9:4]`\ = (bits 5--0) > + > + > =C2=A0Fully Planar YUV Formats > =C2=A0=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D > =C2=A0 --=-7Ch6iLaTw0XauR+6FJtM Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTvDVKBFcTDwhoEbxLZQZRRKWBy9AUCafET4wAKCRDZQZRRKWBy 9Df7AQDdDm+K0RDoDm4EmYyFb7f/DZl/G7cMSaGO8VxO/5JluAEAvBactothia6u XLthlVZdgV7+TAHdpocsHpuQSmts+Qo= =F9Cy -----END PGP SIGNATURE----- --=-7Ch6iLaTw0XauR+6FJtM--