From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: [PATCH 4/6] ARM: dts: sun8i: a83t: Add device node for CSI (Camera Sensor Interface) Date: Mon, 20 May 2019 13:10:49 +0200 Message-ID: <20190520111048.cnh435fnmz7esyks@flea> References: <20190408165744.11672-1-wens@kernel.org> <20190408165744.11672-5-wens@kernel.org> <20190409075804.4zrwjil7ie2gjigu@flea> <20190409082818.z33mq2qrxethldzf@flea> <20190409145225.2ltluiyqa5xha4zd@flea> <20190519135422.l2bnumyjr3dxehhx@core.my.home> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============8506051482723871697==" Return-path: In-Reply-To: <20190519135422.l2bnumyjr3dxehhx@core.my.home> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Chen-Yu Tsai , Mark Rutland , devicetree , Stephen Boyd , Michael Turquette , linux-kernel , Paul Kocialkowski , Chen-Yu Tsai , Rob Herring , Yong Deng , Mauro Carvalho Chehab , linux-clk , linux-arm-kernel , Linux Media Mailing List List-Id: devicetree@vger.kernel.org --===============8506051482723871697== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="qkatogddc44c6dds" Content-Disposition: inline --qkatogddc44c6dds Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Ond=C5=99ej, On Sun, May 19, 2019 at 03:54:22PM +0200, Ond=C5=99ej Jirman wrote: > On Tue, Apr 09, 2019 at 04:52:25PM +0200, Maxime Ripard wrote: > > On Tue, Apr 09, 2019 at 04:40:40PM +0800, Chen-Yu Tsai wrote: > > > On Tue, Apr 9, 2019 at 4:28 PM Maxime Ripard wrote: > > > > > > > > On Tue, Apr 09, 2019 at 04:07:34PM +0800, Chen-Yu Tsai wrote: > > > > > On Tue, Apr 9, 2019 at 3:58 PM Maxime Ripard wrote: > > > > > > On Tue, Apr 09, 2019 at 12:57:42AM +0800, Chen-Yu Tsai wrote: > > > > > > > From: Chen-Yu Tsai > > > > > > > > > > > > > > The A83T SoC has a camera sensor interface (known as CSI in A= llwinner > > > > > > > lingo), which is similar to the one found on the A64 and H3. = The only > > > > > > > difference seems to be that support of MIPI CSI through a con= nected > > > > > > > MIPI CSI-2 bridge. > > > > > > > > > > > > > > Add a device node for it, and pinctrl nodes for the commonly = used MCLK > > > > > > > and 8-bit parallel interface. The property /omit-if-no-ref/ i= s added to > > > > > > > the pinctrl nodes to keep the device tree blob size down if t= hey are > > > > > > > unused. > > > > > > > > > > > > > > Signed-off-by: Chen-Yu Tsai > > > > > > > --- > > > > > > > arch/arm/boot/dts/sun8i-a83t.dtsi | 31 +++++++++++++++++++++= ++++++++++ > > > > > > > 1 file changed, 31 insertions(+) > > > > > > > > > > > > > > diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boo= t/dts/sun8i-a83t.dtsi > > > > > > > index f739b88efb53..0c52f945fd5f 100644 > > > > > > > --- a/arch/arm/boot/dts/sun8i-a83t.dtsi > > > > > > > +++ b/arch/arm/boot/dts/sun8i-a83t.dtsi > > > > > > > @@ -682,6 +682,20 @@ > > > > > > > #interrupt-cells =3D <3>; > > > > > > > #gpio-cells =3D <3>; > > > > > > > > > > > > > > + /omit-if-no-ref/ > > > > > > > + csi_8bit_parallel_pins: csi-8bit-parall= el-pins { > > > > > > > + pins =3D "PE0", "PE2", "PE3", "= PE6", "PE7", > > > > > > > + "PE8", "PE9", "PE10", "P= E11", > > > > > > > + "PE12", "PE13"; > > > > > > > + function =3D "csi"; > > > > > > > + }; > > > > > > > + > > > > > > > + /omit-if-no-ref/ > > > > > > > + csi_mclk_pin: csi-mclk-pin { > > > > > > > + pins =3D "PE1"; > > > > > > > + function =3D "csi"; > > > > > > > + }; > > > > > > > + > > > > > > > emac_rgmii_pins: emac-rgmii-pins { > > > > > > > pins =3D "PD2", "PD3", "PD4", "= PD5", "PD6", "PD7", > > > > > > > "PD11", "PD12", "PD13", = "PD14", "PD18", > > > > > > > @@ -994,6 +1008,23 @@ > > > > > > > interrupts =3D ; > > > > > > > }; > > > > > > > > > > > > > > + csi: camera@1cb0000 { > > > > > > > + compatible =3D "allwinner,sun8i-a83t-cs= i"; > > > > > > > + reg =3D <0x01cb0000 0x1000>; > > > > > > > + interrupts =3D ; > > > > > > > + clocks =3D <&ccu CLK_BUS_CSI>, > > > > > > > + <&ccu CLK_CSI_SCLK>, > > > > > > > + <&ccu CLK_DRAM_CSI>; > > > > > > > + clock-names =3D "bus", "mod", "ram"; > > > > > > > + resets =3D <&ccu RST_BUS_CSI>; > > > > > > > + status =3D "disabled"; > > > > > > > + > > > > > > > + csi_in: port { > > > > > > > + #address-cells =3D <1>; > > > > > > > + #size-cells =3D <0>; > > > > > > > > > > > > If we expect a single enpoint, then we don't need the address-c= ells > > > > > > and size-cells properties. > > > > > > > > > > I wouldn't bet on anything. The way the Q8 tablets did front/back= cameras > > > > > is kind of genius if not very hacky. They have two "identical" se= nsors > > > > > on the same I2C bus and CSI bus, with shared reset line but separ= ate > > > > > shutdown lines. Since they are identical, they also have the same= I2C > > > > > address. I haven't figured out how to model this in the device tr= ee. > > > > > > > > > > The point is, it's perfectly possible to have two or more sensors= use > > > > > the same controller, provided only one be active at a time. > > > > > > > > Right, but I guess the common case would be to have a single sensor, > > > > where that wouldn't be needed. > > > > > > > > In odd cases, we can always specify it in the DTS, and if it becomes > > > > common enough, we can move it to the DTSI. > > > > > > Makes sense. Do you want me to re-spin? > > > > If there's no other comment, we'll fix it when applying. > > This patch series seems to have been forgotten. It doesn't seem there are= any > blockers. Sorry about that :/ > Can you please apply it now? I have some further series (camera module > support for TBS-A711) that depend on this. Some parts of it will have to be merged through v4l2, and I can't apply those patches. Can you resend that series, and ping on a regular basis (like once a week) if you don't get any feedback? Thanks! Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --qkatogddc44c6dds Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXOKLOAAKCRDj7w1vZxhR xcUUAQD7Jfd29f0QBa+jm16CGAaZx4LxWkZ47YM74jycMwsRPQD+JbLPWMLy39fT gI37QUUND5p2czBiA+hpbcz3sQLb8w8= =a/4m -----END PGP SIGNATURE----- --qkatogddc44c6dds-- --===============8506051482723871697== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============8506051482723871697==--