Re: [PATCH 2/3] arm64: dts: qcom: sm8150: Add DISPCC node

[Bjorn Andersson <andersson@kernel.org>]

On Mon, Dec 12, 2022 at 10:33:13AM +0100, Konrad Dybcio wrote:
> Years after the SoC support has been added, it's high time for it to
> get dispcc going. Add the node to ensure that.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
> ---
>  arch/arm64/boot/dts/qcom/sm8150.dtsi | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> index a0c57fb798d3..ff04397777f4 100644
> --- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> @@ -3579,6 +3579,32 @@ camnoc_virt: interconnect@ac00000 {
>  			qcom,bcm-voters = <&apps_bcm_voter>;
>  		};
>  
> +		dispcc: clock-controller@af00000 {
> +			compatible = "qcom,sm8150-dispcc";
> +			reg = <0 0x0af00000 0 0x10000>;
> +			clocks = <&rpmhcc RPMH_CXO_CLK>,
> +				 <0>,
> +				 <0>,
> +				 <0>,
> +				 <0>,
> +				 <0>,
> +				 <0>;
> +			clock-names = "bi_tcxo",
> +				      "dsi0_phy_pll_out_byteclk",
> +				      "dsi0_phy_pll_out_dsiclk",
> +				      "dsi1_phy_pll_out_byteclk",
> +				      "dsi1_phy_pll_out_dsiclk",
> +				      "dp_phy_pll_link_clk",
> +				      "dp_phy_pll_vco_div_clk";
> +			#clock-cells = <1>;
> +			#reset-cells = <1>;
> +			#power-domain-cells = <1>;
> +
> +			power-domains = <&rpmhpd SM8150_MMCX>;
> +			/* TODO: Maybe rpmhpd_opp_min_svs could work as well? */

The power-domain being not disabled should be sufficient for us to
access the dispcc. Beyond that votes would be needed for particular
frequencies, and that goes in the client nodes/opp-tables.

So you should be able to drop this comment and the required-opps.

Regards,
Bjorn

> +			required-opps = <&rpmhpd_opp_low_svs>;
> +		};
> +
>  		pdc: interrupt-controller@b220000 {
>  			compatible = "qcom,sm8150-pdc", "qcom,pdc";
>  			reg = <0 0x0b220000 0 0x400>;
> -- 
> 2.38.1
>