linux-kernel - Re: [PATCH v4 2/4] arm64: dts: qcom: sc7280: Add DSI display nodes

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Message-ID: <YaeU4oG6WX9LouFd@builder.lan>
Date:   Wed, 1 Dec 2021 09:29:38 -0600
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Sankeerth Billakanti <quic_sbillaka@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, agross@...nel.org, robh+dt@...nel.org,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        robdclark@...il.com, seanpaul@...omium.org, swboyd@...omium.org,
        quic_kalyant@...cinc.com, quic_abhinavk@...cinc.com,
        dianders@...omium.org, quic_khsieh@...cinc.com,
        Rajeev Nandan <quic_rajeevny@...cinc.com>
Subject: Re: [PATCH v4 2/4] arm64: dts: qcom: sc7280: Add DSI display nodes

On Mon 22 Nov 05:26 CST 2021, Sankeerth Billakanti wrote:

> From: Krishna Manikandan <quic_mkrishn@...cinc.com>
> 
> Add DSI controller and PHY nodes for sc7280.
> 
> Signed-off-by: Rajeev Nandan <quic_rajeevny@...cinc.com>
> Signed-off-by: Krishna Manikandan <quic_mkrishn@...cinc.com>
> Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
> Reviewed-by: Stephen Boyd <swboyd@...omium.org>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@...cinc.com>
> ---
> 
> Changes in v4:
>     None
> 
> Changes in v3:
>     - Add the dsi_phy clocks (Kuogee Hsieh)
>     - One clock cell per line (Stephen Boyd)
> 
> Changes in v2:
>     - Drop flags from interrupts (Stephen Boyd)
>     - Rename dsi-opp-table (Stephen Boyd)
>     - Rename dsi phy  node (Stephen Boyd)
> 
> 
>  arch/arm64/boot/dts/qcom/sc7280.dtsi | 111 ++++++++++++++++++++++++++++++++++-
>  1 file changed, 109 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index a4536b6..12c4d32 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -2691,8 +2691,14 @@
>  			reg = <0 0xaf00000 0 0x20000>;
>  			clocks = <&rpmhcc RPMH_CXO_CLK>,
>  				 <&gcc GCC_DISP_GPLL0_CLK_SRC>,
> -				 <0>, <0>, <0>, <0>, <0>, <0>;
> -			clock-names = "bi_tcxo", "gcc_disp_gpll0_clk",
> +				 <&dsi_phy 0>,
> +				 <&dsi_phy 1>,
> +				 <0>,
> +				 <0>,
> +				 <0>,
> +				 <0>;
> +			clock-names = "bi_tcxo",
> +				      "gcc_disp_gpll0_clk",
>  				      "dsi0_phy_pll_out_byteclk",
>  				      "dsi0_phy_pll_out_dsiclk",
>  				      "dp_phy_pll_link_clk",
> @@ -2768,6 +2774,18 @@
>  
>  				status = "disabled";
>  
> +				ports {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					port@0 {
> +						reg = <0>;
> +						dpu_intf1_out: endpoint {
> +							remote-endpoint = <&dsi0_in>;
> +						};
> +					};
> +				};
> +
>  				mdp_opp_table: opp-table {
>  					compatible = "operating-points-v2";
>  
> @@ -2792,6 +2810,95 @@
>  					};
>  				};
>  			};
> +
> +			dsi0: dsi@...4000 {

Please label this mdss_dsi0, to make it group nicely when sorted in the
dts.

> +				compatible = "qcom,mdss-dsi-ctrl";
> +				reg = <0 0x0ae94000 0 0x400>;
> +				reg-names = "dsi_ctrl";
> +
> +				interrupt-parent = <&mdss>;
> +				interrupts = <4>;
> +
> +				clocks = <&dispcc DISP_CC_MDSS_BYTE0_CLK>,
> +					 <&dispcc DISP_CC_MDSS_BYTE0_INTF_CLK>,
> +					 <&dispcc DISP_CC_MDSS_PCLK0_CLK>,
> +					 <&dispcc DISP_CC_MDSS_ESC0_CLK>,
> +					 <&dispcc DISP_CC_MDSS_AHB_CLK>,
> +					 <&gcc GCC_DISP_HF_AXI_CLK>;
> +				clock-names = "byte",
> +					      "byte_intf",
> +					      "pixel",
> +					      "core",
> +					      "iface",
> +					      "bus";
> +
> +				operating-points-v2 = <&dsi_opp_table>;
> +				power-domains = <&rpmhpd SC7280_CX>;
> +
> +				phys = <&dsi_phy>;
> +				phy-names = "dsi";
> +
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				status = "disabled";
> +
> +				ports {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					port@0 {
> +						reg = <0>;
> +						dsi0_in: endpoint {
> +							remote-endpoint = <&dpu_intf1_out>;
> +						};
> +					};
> +
> +					port@1 {
> +						reg = <1>;
> +						dsi0_out: endpoint {
> +						};
> +					};
> +				};
> +
> +				dsi_opp_table: opp-table {
> +					compatible = "operating-points-v2";
> +
> +					opp-187500000 {
> +						opp-hz = /bits/ 64 <187500000>;
> +						required-opps = <&rpmhpd_opp_low_svs>;
> +					};
> +
> +					opp-300000000 {
> +						opp-hz = /bits/ 64 <300000000>;
> +						required-opps = <&rpmhpd_opp_svs>;
> +					};
> +
> +					opp-358000000 {
> +						opp-hz = /bits/ 64 <358000000>;
> +						required-opps = <&rpmhpd_opp_svs_l1>;
> +					};
> +				};
> +			};
> +
> +			dsi_phy: phy@...4400 {

Why is above "dsi0" when this is "dsi_phy", drop the 0 on dsi0?

Also, please label this mdss_dsi_phy.

Thanks,
Bjorn

> +				compatible = "qcom,sc7280-dsi-phy-7nm";
> +				reg = <0 0x0ae94400 0 0x200>,
> +				      <0 0x0ae94600 0 0x280>,
> +				      <0 0x0ae94900 0 0x280>;
> +				reg-names = "dsi_phy",
> +					    "dsi_phy_lane",
> +					    "dsi_pll";
> +
> +				#clock-cells = <1>;
> +				#phy-cells = <0>;
> +
> +				clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
> +					 <&rpmhcc RPMH_CXO_CLK>;
> +				clock-names = "iface", "ref";
> +
> +				status = "disabled";
> +			};
>  		};
>  
>  		pdc: interrupt-controller@...0000 {
> -- 
> 2.7.4
>