Re: [PATCH v3 5/5] arm64: dts: qcom: sm8450: add dp controller

[Neil Armstrong <neil.armstrong@linaro.org>]

On 10/02/2023 16:24, Dmitry Baryshkov wrote:
> On 10/02/2023 16:44, Neil Armstrong wrote:
>> Add the Display Port controller subnode to the MDSS node.
>>
>> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
>> ---
>>   arch/arm64/boot/dts/qcom/sm8450.dtsi | 79 ++++++++++++++++++++++++++++++++++++
>>   1 file changed, 79 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
>> index 6caa2c8efb46..72d54beb7d7c 100644
>> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
>> @@ -2751,6 +2751,13 @@ dpu_intf2_out: endpoint {
>>                           };
>>                       };
>> +                    port@2 {
>> +                        reg = <2>;
>> +                        dpu_intf0_out: endpoint {
>> +                            remote-endpoint = <&mdss_dp0_in>;
>> +                        };
>> +                    };
>> +
>>                   };
>>                   mdp_opp_table: opp-table {
>> @@ -2783,6 +2790,78 @@ opp-500000000 {
>>                   };
>>               };
>> +            mdss_dp0: displayport-controller@ae90000 {
>> +                compatible = "qcom,sm8350-dp";

Exact, must fix.

> 
> Missing "qcom,sm8450-dp". As I wrote in the comment to patch 1, I'd suggest having just a single entry here rather than keeping both 8350 and 8450 entries.
> 
>> +                reg = <0 0xae90000 0 0xfc>,
>> +                      <0 0xae90200 0 0xc0>,
>> +                      <0 0xae90400 0 0x770>,
>> +                      <0 0xae91000 0 0x98>,
>> +                      <0 0xae91400 0 0x98>;
> 
> 
> While this sounds correct, usually we used the even size here (0x200, 0x400, etc.). Can we please switch to it (especially since sm8350-dp uses even sizes).

I don't have access to registers layout for HDK8450 but the system freezes when using even sizes, using
the exact register size works fine.

Neil

> 
>> +                interrupt-parent = <&mdss>;
>> +                interrupts = <12>;
>> +                clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
>> +                     <&dispcc DISP_CC_MDSS_DPTX0_AUX_CLK>,
>> +                     <&dispcc DISP_CC_MDSS_DPTX0_LINK_CLK>,
>> +                     <&dispcc DISP_CC_MDSS_DPTX0_LINK_INTF_CLK>,
>> +                     <&dispcc DISP_CC_MDSS_DPTX0_PIXEL0_CLK>;
>> +                clock-names = "core_iface",
>> +                          "core_aux",
>> +                          "ctrl_link",
>> +                                  "ctrl_link_iface",
>> +                          "stream_pixel";
>> +
>> +                assigned-clocks = <&dispcc DISP_CC_MDSS_DPTX0_LINK_CLK_SRC>,
>> +                          <&dispcc DISP_CC_MDSS_DPTX0_PIXEL0_CLK_SRC>;
>> +                assigned-clock-parents = <&usb_1_qmpphy QMP_USB43DP_DP_LINK_CLK>,
>> +                             <&usb_1_qmpphy QMP_USB43DP_DP_VCO_DIV_CLK>;
>> +
>> +                phys = <&usb_1_qmpphy QMP_USB43DP_DP_PHY>;
>> +                    phy-names = "dp";
>> +
>> +                    #sound-dai-cells = <0>;
>> +
>> +                operating-points-v2 = <&dp_opp_table>;
>> +                power-domains = <&rpmhpd SM8450_MMCX>;
>> +
>> +                status = "disabled";
>> +
>> +                ports {
>> +                    #address-cells = <1>;
>> +                    #size-cells = <0>;
>> +
>> +                    port@0 {
>> +                        reg = <0>;
>> +                        mdss_dp0_in: endpoint {
>> +                            remote-endpoint = <&dpu_intf0_out>;
>> +                        };
>> +                    };
>> +                };
>> +
>> +                dp_opp_table: opp-table {
>> +                    compatible = "operating-points-v2";
>> +
>> +                    opp-160000000 {
>> +                        opp-hz = /bits/ 64 <160000000>;
>> +                        required-opps = <&rpmhpd_opp_low_svs>;
>> +                    };
>> +
>> +                    opp-270000000 {
>> +                        opp-hz = /bits/ 64 <270000000>;
>> +                        required-opps = <&rpmhpd_opp_svs>;
>> +                    };
>> +
>> +                    opp-540000000 {
>> +                        opp-hz = /bits/ 64 <540000000>;
>> +                        required-opps = <&rpmhpd_opp_svs_l1>;
>> +                    };
>> +
>> +                    opp-810000000 {
>> +                        opp-hz = /bits/ 64 <810000000>;
>> +                        required-opps = <&rpmhpd_opp_nom>;
>> +                    };
>> +                };
>> +            };
>> +
>>               mdss_dsi0: dsi@ae94000 {
>>                   compatible = "qcom,sm8450-dsi-ctrl", "qcom,mdss-dsi-ctrl";
>>                   reg = <0 0x0ae94000 0 0x400>;
>>
>