From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rui Miguel Silva Subject: Re: [PATCH v6 07/13] media: dt-bindings: add bindings for i.MX7 media driver Date: Thu, 02 Aug 2018 17:48:06 +0100 Message-ID: References: <20180522145245.3143-1-rui.silva@linaro.org> <20180522145245.3143-8-rui.silva@linaro.org> <20180802130027.yltizjaagt7q3vqu@paasikivi.fi.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <20180802130027.yltizjaagt7q3vqu@paasikivi.fi.intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: Sakari Ailus Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org, Greg Kroah-Hartman , Ryan Harkin , Rob Herring , Rui Miguel Silva , Philipp Zabel , Steve Longerbeam , Fabio Estevam , mchehab@kernel.org, Shawn Guo , linux-clk@vger.kernel.org, linux-media@vger.kernel.org List-Id: devicetree@vger.kernel.org Hi Sakari, Thanks for the review. I will take this in account when preparing the v7, all your comments bellow look reasonable to me. --- Cheers, Rui On Thu 02 Aug 2018 at 14:00, Sakari Ailus wrote: > Hi Rui, > > On Tue, May 22, 2018 at 03:52:39PM +0100, Rui Miguel Silva > wrote: >> Add bindings documentation for i.MX7 media drivers. >> The imx7 MIPI CSI2 and imx7 CMOS Sensor Interface. >> >> Signed-off-by: Rui Miguel Silva >> --- >> .../devicetree/bindings/media/imx7-csi.txt | 44 ++++++++++ >> .../bindings/media/imx7-mipi-csi2.txt | 82 >> +++++++++++++++++++ >> 2 files changed, 126 insertions(+) >> create mode 100644 >> Documentation/devicetree/bindings/media/imx7-csi.txt >> create mode 100644 >> Documentation/devicetree/bindings/media/imx7-mipi-csi2.txt >> >> diff --git >> a/Documentation/devicetree/bindings/media/imx7-csi.txt >> b/Documentation/devicetree/bindings/media/imx7-csi.txt >> new file mode 100644 >> index 000000000000..aab4f5d72390 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/media/imx7-csi.txt >> @@ -0,0 +1,44 @@ >> +Freescale i.MX7 CMOS Sensor Interface >> +===================================== >> + >> +csi node >> +-------- >> + >> +This is device node for the CMOS Sensor Interface (CSI) which >> enables the chip >> +to connect directly to external CMOS image sensors. >> + >> +Required properties: >> + >> +- compatible : "fsl,imx7-csi"; >> +- reg : base address and length of the register set >> for the device; >> +- interrupts : should contain CSI interrupt; >> +- clocks : list of clock specifiers, see >> + >> Documentation/devicetree/bindings/clock/clock-bindings.txt for >> details; >> +- clock-names : must contain "axi", "mclk" and "dcic" >> entries, matching >> + entries in the clock property; >> + >> +The device node should contain one 'port' child node with one >> child 'endpoint' > > "should" or "shall"? > >> +node, according to the bindings defined in >> Documentation/devicetree/bindings/ >> +media/video-interfaces.txt. In the following example a remote >> endpoint is a > > I wouldn't split the path as it breaks copy-paste; up to you. > >> +video multiplexer. >> + >> +example: >> + >> + csi: csi@30710000 { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + compatible = "fsl,imx7-csi"; >> + reg = <0x30710000 0x10000>; >> + interrupts = > IRQ_TYPE_LEVEL_HIGH>; >> + clocks = <&clks IMX7D_CLK_DUMMY>, >> + <&clks >> IMX7D_CSI_MCLK_ROOT_CLK>, >> + <&clks >> IMX7D_CLK_DUMMY>; >> + clock-names = "axi", "mclk", "dcic"; >> + >> + port { >> + csi_from_csi_mux: endpoint { >> + remote-endpoint = >> <&csi_mux_to_csi>; >> + }; >> + }; >> + }; >> diff --git >> a/Documentation/devicetree/bindings/media/imx7-mipi-csi2.txt >> b/Documentation/devicetree/bindings/media/imx7-mipi-csi2.txt >> new file mode 100644 >> index 000000000000..7c5f20863724 >> --- /dev/null >> +++ >> b/Documentation/devicetree/bindings/media/imx7-mipi-csi2.txt >> @@ -0,0 +1,82 @@ >> +Freescale i.MX7 Mipi CSI2 >> +========================= >> + >> +mipi_csi2 node >> +-------------- >> + >> +This is the device node for the MIPI CSI-2 receiver core in >> i.MX7 SoC. It is >> +compatible with previous version of Samsung D-phy. >> + >> +Required properties: >> + >> +- compatible : "fsl,imx7-mipi-csi2"; >> +- reg : base address and length of the register set >> for the device; >> +- interrupts : should contain MIPI CSIS interrupt; >> +- clocks : list of clock specifiers, see >> + >> Documentation/devicetree/bindings/clock/clock-bindings.txt for >> details; >> +- clock-names : must contain "pclk", "wrap" and "phy" >> entries, matching >> + entries in the clock property; >> +- power-domains : a phandle to the power domain, see >> + >> Documentation/devicetree/bindings/power/power_domain.txt for >> details. >> +- reset-names : should include following entry "mrst"; >> +- resets : a list of phandle, should contain reset >> entry of >> + reset-names; >> +- phy-supply : from the generic phy bindings, a phandle to >> a regulator that >> + provides power to MIPI CSIS core; >> + >> +Optional properties: >> + >> +- clock-frequency : The IP's main (system bus) clock frequency >> in Hz, default >> + value when this property is not specified is >> 166 MHz; >> +- fsl,csis-hs-settle : differential receiver (HS-RX) settle >> time; >> + >> +port node >> +--------- >> + >> +- reg : (required) can take the values 0 or 1, >> where 0 is the >> + related sink port and port 1 should be >> the source one; > > Should and is -> shall? > > I think you should also elaborate whether or not the port (as > well as the > endpoint) nodes themselves are mandatory. > >> + >> +endpoint node >> +------------- >> + >> +- data-lanes : (required) an array specifying active >> physical MIPI-CSI2 >> + data input lanes and their mapping to logical >> lanes; the >> + array's content is unused, only its length is >> meaningful; > > If this is for port 0 only, please document that. Which values > (length) are > allowed? > >> + >> +example: >> + >> + mipi_csi: mipi-csi@30750000 { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + compatible = "fsl,imx7-mipi-csi2"; >> + reg = <0x30750000 0x10000>; >> + interrupts = ; >> + clocks = <&clks IMX7D_IPG_ROOT_CLK>, >> + <&clks >> IMX7D_MIPI_CSI_ROOT_CLK>, >> + <&clks >> IMX7D_MIPI_DPHY_ROOT_CLK>; >> + clock-names = "pclk", "wrap", "phy"; >> + clock-frequency = <166000000>; >> + power-domains = <&pgc_mipi_phy>; >> + phy-supply = <®_1p0d>; >> + resets = <&src IMX7_RESET_MIPI_PHY_MRST>; >> + reset-names = "mrst"; >> + fsl,csis-hs-settle = <3>; >> + >> + port@0 { >> + reg = <0>; >> + >> + mipi_from_sensor: endpoint { >> + remote-endpoint = >> <&ov2680_to_mipi>; >> + data-lanes = <1>; >> + }; >> + }; >> + >> + port@1 { >> + reg = <1>; >> + >> + mipi_vc0_to_csi_mux: endpoint { >> + remote-endpoint = >> <&csi_mux_from_mipi_vc0>; >> + }; >> + }; >> + };