Re: [PATCH 09/22] ARM: dts: sun8i: v3s: Add nodes for MIPI CSI-2 support

Samuel Holland
2021-09-11T02:33:15Z

On 9/10/21 1:41 PM, Paul Kocialkowski wrote:
> MIPI CSI-2 is supported on the V3s with an A31-based MIPI CSI-2 bridge
> controller. The controller uses a separate D-PHY, which is the same
> that is otherwise used for MIPI DSI, but used in Rx mode.
>
> On the V3s, the CSI0 controller is dedicated to MIPI CSI-2 as it does
> not have access to any parallel interface pins.
>
> Add all the necessary nodes (CSI0, MIPI CSI-2 bridge and D-PHY) to
> support the MIPI CSI-2 interface.
>
> Note that a fwnode graph link is created between CSI0 and MIPI CSI-2
> even when no sensor is connected. This will result in a probe failure
> for the controller as long as no sensor is connected but this is fine
> since no other interface is available.
>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> ---
> arch/arm/boot/dts/sun8i-v3s.dtsi | 72 ++++++++++++++++++++++++++++++++
> 1 file changed, 72 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-v3s.dtsi b/arch/arm/boot/dts/sun8i-v3s.dtsi
> index a77b63362a1d..ec7fa6459547 100644
> --- a/arch/arm/boot/dts/sun8i-v3s.dtsi
> +++ b/arch/arm/boot/dts/sun8i-v3s.dtsi
> @@ -612,6 +612,34 @@ spi0: spi@1c68000 {
> #size-cells = <0>;
> };
>
> + csi0: camera@1cb0000 {
> + compatible = "allwinner,sun8i-v3s-csi";
> + reg = <0x01cb0000 0x1000>;
> + interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&ccu CLK_BUS_CSI>,
> + <&ccu CLK_CSI1_SCLK>,
> + <&ccu CLK_DRAM_CSI>;
> + clock-names = "bus", "mod", "ram";
> + resets = <&ccu RST_BUS_CSI>;
> + status = "disabled";
> +
> + assigned-clocks = <&ccu CLK_CSI1_SCLK>;
> + assigned-clock-parents = <&ccu CLK_PLL_ISP>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@1 {
> + reg = <1>;
> +
> + csi0_in_mipi_csi2: endpoint {
> + remote-endpoint = <&mipi_csi2_out_csi0>;
> + };
> + };
> + };
> + };
> +
> csi1: camera@1cb4000 {
> compatible = "allwinner,sun8i-v3s-csi";
> reg = <0x01cb4000 0x3000>;

All of the new nodes should be added above this one, to maintain unit
address order.

Regards,
Samuel

> @@ -637,5 +665,49 @@ gic: interrupt-controller@1c81000 {
> #interrupt-cells = <3>;
> interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> };
> +
> + mipi_csi2: csi@1cb1000 {
> + compatible = "allwinner,sun8i-v3s-mipi-csi2",
> + "allwinner,sun6i-a31-mipi-csi2";
> + reg = <0x01cb1000 0x1000>;
> + interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&ccu CLK_BUS_CSI>,
> + <&ccu CLK_CSI1_SCLK>;
> + clock-names = "bus", "mod";
> + resets = <&ccu RST_BUS_CSI>;
> + status = "disabled";
> +
> + phys = <&dphy>;
> + phy-names = "dphy";
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + mipi_csi2_in: port@0 {
> + reg = <0>;
> + };
> +
> + mipi_csi2_out: port@1 {
> + reg = <1>;
> +
> + mipi_csi2_out_csi0: endpoint {
> + remote-endpoint = <&csi0_in_mipi_csi2>;
> + };
> + };
> + };
> + };
> +
> + dphy: d-phy@1cb2000 {
> + compatible = "allwinner,sun6i-a31-mipi-dphy";
> + reg = <0x01cb2000 0x1000>;
> + clocks = <&ccu CLK_BUS_CSI>,
> + <&ccu CLK_MIPI_CSI>;
> + clock-names = "bus", "mod";
> + resets = <&ccu RST_BUS_CSI>;
> + allwinner,direction = "rx";
> + status = "disabled";
> + #phy-cells = <0>;
> + };
> };
> };