Re: [PATCH v1 1/2] arm64: dts: imx8mp: Add CSIS DT nodes

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Marco,

On Mon, Apr 17, 2023 at 08:50:59AM +0200, Marco Felsch wrote:
> Hi Laurent,
> 
> your patch LGTM just one nit/idea, please see below.
> 
> On 23-04-17, Laurent Pinchart wrote:
> > Add DT nodes for the two CSI-2 receivers of the i.MX8MP.
> > 
> > Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > ---
> >  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 60 +++++++++++++++++++++++
> >  1 file changed, 60 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > index 2dd60e3252f3..2a374a4c14a2 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > @@ -1239,6 +1239,66 @@ ldb_lvds_ch1: endpoint {
> >  				};
> >  			};
> >  
> > +			mipi_csi_0: csi@32e40000 {
> > +				compatible = "fsl,imx8mp-mipi-csi2", "fsl,imx8mm-mipi-csi2";
> > +				reg = <0x32e40000 0x10000>;
> > +				interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
> > +				clock-frequency = <500000000>;
> > +				clocks = <&clk IMX8MP_CLK_MEDIA_APB_ROOT>,
> > +					 <&clk IMX8MP_CLK_MEDIA_CAM1_PIX_ROOT>,
> > +					 <&clk IMX8MP_CLK_MEDIA_MIPI_PHY1_REF_ROOT>,
> > +					 <&clk IMX8MP_CLK_MEDIA_AXI_ROOT>;
> > +				clock-names = "pclk", "wrap", "phy", "axi";
> > +				assigned-clocks = <&clk IMX8MP_CLK_MEDIA_CAM1_PIX>;
> > +				assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_1000M>;
> > +				assigned-clock-rates = <500000000>;
> > +				power-domains = <&media_blk_ctrl IMX8MP_MEDIABLK_PD_MIPI_CSI2_1>;
> > +				status = "disabled";
> > +
> > +				ports {
> > +					#address-cells = <1>;
> > +					#size-cells = <0>;
> > +
> > +					port@0 {
> > +						reg = <0>;
> 
> If we would add:
> 						mipi_csi_0_in: endpoint {};
> 
> here we could refernce it from overlays/board dts files more easily.

Isn't there an unwritten rule (or consensus) that an endpoint should
always have a remote-endpoint property ? While ports describe hardware
properties of a device and should always be there regardless of
connections, endpoints describe connections and I don't think they
should be instantiated with a valid remote-endpoint.

> > +					};
> > +
> > +					port@1 {
> > +						reg = <1>;
> > +					};
> > +				};
> > +			};
> > +
> > +			mipi_csi_1: csi@32e50000 {
> > +				compatible = "fsl,imx8mp-mipi-csi2", "fsl,imx8mm-mipi-csi2";
> > +				reg = <0x32e50000 0x10000>;
> > +				interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
> > +				clock-frequency = <266000000>;
> > +				clocks = <&clk IMX8MP_CLK_MEDIA_APB_ROOT>,
> > +					 <&clk IMX8MP_CLK_MEDIA_CAM2_PIX_ROOT>,
> > +					 <&clk IMX8MP_CLK_MEDIA_MIPI_PHY1_REF_ROOT>,
> > +					 <&clk IMX8MP_CLK_MEDIA_AXI_ROOT>;
> > +				clock-names = "pclk", "wrap", "phy", "axi";
> > +				assigned-clocks = <&clk IMX8MP_CLK_MEDIA_CAM2_PIX>;
> > +				assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_1000M>;
> > +				assigned-clock-rates = <266000000>;
> > +				power-domains = <&media_blk_ctrl IMX8MP_MEDIABLK_PD_MIPI_CSI2_2>;
> > +				status = "disabled";
> > +
> > +				ports {
> > +					#address-cells = <1>;
> > +					#size-cells = <0>;
> > +
> > +					port@0 {
> > +						reg = <0>;
> > +					};
> > +
> > +					port@1 {
> > +						reg = <1>;
> > +					};
> > +				};
> > +			};
> > +
> >  			pcie_phy: pcie-phy@32f00000 {
> >  				compatible = "fsl,imx8mp-pcie-phy";
> >  				reg = <0x32f00000 0x10000>;

-- 
Regards,

Laurent Pinchart

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