linux-kernel - Re: [PATCH v4 08/11] arm64: dts: qcom: x1e80100: Add display nodes

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Date: Tue, 23 Jan 2024 19:36:17 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Abel Vesa <abel.vesa@...aro.org>, Andy Gross <agross@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Sibi Sankar <quic_sibis@...cinc.com>,
 Rajendra Nayak <quic_rjendra@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 08/11] arm64: dts: qcom: x1e80100: Add display nodes



On 1/23/24 12:01, Abel Vesa wrote:
> Add the required nodes to support display on X1E80100.
> 
> Co-developed-by: Sibi Sankar <quic_sibis@...cinc.com>
> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
> Co-developed-by: Rajendra Nayak <quic_rjendra@...cinc.com>
> Signed-off-by: Rajendra Nayak <quic_rjendra@...cinc.com>
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
>   arch/arm64/boot/dts/qcom/x1e80100.dtsi | 518 +++++++++++++++++++++++++++++++++
>   1 file changed, 518 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> index e8d2ea2b26ed..247ff7a9e405 100644
> --- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> +++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> @@ -4,6 +4,7 @@
>    */
>   
>   #include <dt-bindings/clock/qcom,rpmh.h>
> +#include <dt-bindings/clock/qcom,x1e80100-dispcc.h>
>   #include <dt-bindings/clock/qcom,x1e80100-gcc.h>
>   #include <dt-bindings/clock/qcom,x1e80100-tcsr.h>
>   #include <dt-bindings/dma/qcom-gpi.h>
> @@ -3298,6 +3299,523 @@ usb_1_ss1_role_switch: endpoint {
>   			};
>   		};
>   
> +		mdss: display-subsystem@...0000 {
> +			compatible = "qcom,x1e80100-mdss";
> +			reg = <0 0x0ae00000 0 0x1000>;
> +			reg-names = "mdss";
> +
> +			interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
> +				 <&gcc GCC_DISP_AHB_CLK>,
> +				 <&gcc GCC_DISP_HF_AXI_CLK>,
> +				 <&dispcc DISP_CC_MDSS_MDP_CLK>;
> +
> +			resets = <&dispcc DISP_CC_MDSS_CORE_BCR>;
> +
> +			interconnects = <&mmss_noc MASTER_MDP QCOM_ICC_TAG_ALWAYS
> +					 &gem_noc SLAVE_LLCC QCOM_ICC_TAG_ALWAYS>,
> +					<&mc_virt MASTER_LLCC QCOM_ICC_TAG_ALWAYS
> +					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>;
> +			interconnect-names = "mdp0-mem",
> +					     "mdp1-mem";

You likely also want to add the cpu-cfg path

[...]

> +
> +		dispcc: clock-controller@...0000 {
> +			compatible = "qcom,x1e80100-dispcc";
> +			reg = <0 0x0af00000 0 0x20000>;
> +			clocks = <&bi_tcxo_div2>,
> +				 <&bi_tcxo_ao_div2>,
> +				 <&gcc GCC_DISP_AHB_CLK>,

This clock is not actually registered with the CCF.. Which means it's
also never cleanly shut down.. Please fix the clock driver and check
which others got omitted as well.

> +				 <&sleep_clk>,
> +				 <0>, /* dsi0 */
> +				 <0>,
> +				 <0>, /* dsi1 */
> +				 <0>,
> +				 <&usb_1_ss0_qmpphy QMP_USB43DP_DP_LINK_CLK>, /* dp0 */
> +				 <&usb_1_ss0_qmpphy QMP_USB43DP_DP_VCO_DIV_CLK>,
> +				 <&usb_1_ss1_qmpphy QMP_USB43DP_DP_LINK_CLK>, /* dp1 */
> +				 <&usb_1_ss1_qmpphy QMP_USB43DP_DP_VCO_DIV_CLK>,
> +				 <&mdss_dp2_phy 0>, /* dp2 */
> +				 <&mdss_dp2_phy 1>,
> +				 <&mdss_dp3_phy 0>, /* dp3 */
> +				 <&mdss_dp3_phy 1>;
> +			power-domains = <&rpmhpd RPMHPD_MMCX>;

Likely:

required-opps = <&rpmhpd_opp_low_svs>;

so that the PLLs have a chance to spin up

Konrad