Re: [PATCH v6 16/22] arm64: dts: allwinner: a64: Add DSI pipeline

Maxime Ripard
2019-01-25T18:51:27Z

On Fri, Jan 25, 2019 at 01:28:54AM +0530, Jagan Teki wrote:
> The A64 has a MIPI-DSI block which is similar to A31.
>
> Add dsi, dphy nodes with A31 fallback compatible and finally
> connect the dsi node to tcon0 node to make proper DSI pipeline.
>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> ---
> arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 47 +++++++++++++++++++
> 1 file changed, 47 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> index cdc154b14a7e..e18d81aff813 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> @@ -358,6 +358,12 @@
> #address-cells = <1>;
> #size-cells = <0>;
> reg = <1>;
> +
> + tcon0_out_dsi: endpoint@1 {
> + reg = <1>;
> + remote-endpoint = <&dsi_in_tcon0>;
> + allwinner,tcon-channel = <1>;
> + };
> };
> };
> };
> @@ -935,6 +941,47 @@
> status = "disabled";
> };
>
> + dsi: dsi@1ca0000 {
> + compatible = "allwinner,sun50i-a64-mipi-dsi",
> + "allwinner,sun6i-a31-mipi-dsi";
> + reg = <0x01ca0000 0x1000>;
> + interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&ccu CLK_BUS_MIPI_DSI>,
> + <&ccu CLK_DSI_DPHY>;

This one looks weird. There's only a single clock in the A64, and it
seems to be for the D-PHY only.

And the rate is fixed at 148.5 MHz apparently, as opposed to the
current code that is running at twice that speed.

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering