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Tue, 19 May 2026 17:22:59 +0200 (CEST) Message-ID: <77a0553dc48c270768525a53854b3d32abcbf642.camel@collabora.com> Subject: Re: [PATCH 07/16] media: v4l2-common: Add NV12_16L16 pixel format to v4l2 format info From: Nicolas Dufresne To: Paul Kocialkowski , linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev Cc: Mauro Carvalho Chehab , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Greg Kroah-Hartman , Arash Golgol , Laurent Pinchart Date: Tue, 19 May 2026 11:22:58 -0400 In-Reply-To: <20260518102451.417971-8-paulk@sys-base.io> References: <20260518102451.417971-1-paulk@sys-base.io> <20260518102451.417971-8-paulk@sys-base.io> 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="=-3jaEoSmnM5AxWGabWN4z" User-Agent: Evolution 3.60.1 (3.60.1-1.fc44) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260519_082304_019126_F0BA26EB X-CRM114-Status: GOOD ( 15.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --=-3jaEoSmnM5AxWGabWN4z Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Le lundi 18 mai 2026 =C3=A0 12:24 +0200, Paul Kocialkowski a =C3=A9crit=C2= =A0: > Represent the NV12_16L16 pixel format in the v4l2 format info table. > This is a 16x16 tiled version of NV12. >=20 > Signed-off-by: Paul Kocialkowski > --- > =C2=A0drivers/media/v4l2-core/v4l2-common.c | 2 ++ > =C2=A01 file changed, 2 insertions(+) >=20 > diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-c= ore/v4l2-common.c > index e142d40c71b9..6194d6eb9c56 100644 > --- a/drivers/media/v4l2-core/v4l2-common.c > +++ b/drivers/media/v4l2-core/v4l2-common.c > @@ -313,6 +313,8 @@ const struct v4l2_format_info *v4l2_format_info(u32 f= ormat) > =C2=A0 =C2=A0 .block_w =3D { 4, 4, 0, 0 }, .block_h =3D { 4, 4, 0, 0 }}, > =C2=A0 { .format =3D V4L2_PIX_FMT_P010_4L4, .pixel_enc =3D V4L2_PIXEL_EN= C_YUV, .mem_planes =3D 1, .comp_planes =3D 2, .bpp =3D { 2, 4, 0, 0 }, .bpp= _div =3D { 1, 1, 1, 1 }, .hdiv =3D 2, .vdiv =3D 2, > =C2=A0 =C2=A0 .block_w =3D { 4, 4, 0, 0 }, .block_h =3D { 4, 4, 0, 0 }}, > + { .format =3D V4L2_PIX_FMT_NV12_16L16, .pixel_enc =3D V4L2_PIXEL_ENC_Y= UV, .mem_planes =3D 1, .comp_planes =3D 2, .bpp =3D { 1, 2, 0, 0 }, .bpp_di= v =3D { 1, 1, 1, 1 }, .hdiv =3D 2, .vdiv =3D 2, > + =C2=A0 .block_w =3D { 16, 16, 0, 0 }, .block_h =3D { 16, 16, 0, 0 }}, I suspect this is: + { .format =3D V4L2_PIX_FMT_NV12_16L16, .pixel_enc =3D V4L2_PIXEL_ENC_YUV, .mem_planes =3D 1, .comp_planes =3D 2, .bpp =3D { 1, 2,= 0, 0 }, .bpp_div =3D { 1, 1, 1, 1 }, .hdiv =3D 2, .vdiv =3D 2, + .block_w =3D { 16, 8, 0, 0 }, .block_h =3D { 16, 16, 0, 0 }}, This was introduced for the Samsung MFC decoders on Exynos 5, has been matc= hed to V4L2_PIX_FMT_HM12, but I don't how it was tested though. But in this err= a, all the tiling was fixes dimensions in bytes, where your definition would m= ake the UV tiles twice the size of Y tiles. Nicolas > =C2=A0 > =C2=A0 /* YUV planar formats, non contiguous variant */ > =C2=A0 { .format =3D V4L2_PIX_FMT_YUV420M, .pixel_enc =3D V4L2_PIXEL_ENC= _YUV, .mem_planes =3D 3, .comp_planes =3D 3, .bpp =3D { 1, 1, 1, 0 }, .bpp_= div =3D { 1, 1, 1, 1 }, .hdiv =3D 2, .vdiv =3D 2 }, --=-3jaEoSmnM5AxWGabWN4z Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTvDVKBFcTDwhoEbxLZQZRRKWBy9AUCagyAUgAKCRDZQZRRKWBy 9IajAP9qTPEgo5Hv9psPbr8R5uHkMx1r0b+TgKSHeDmgfQrILwEAuZsp1gb44Xug Jx13TfSlNfWxumQomxxNJE9qwF6d2gI= =3jLk -----END PGP SIGNATURE----- --=-3jaEoSmnM5AxWGabWN4z--