linux-kernel - Re: [PATCH 01/13] arm64: dts: qcom: sc7180: Update dts for DP phy inside QMP phy

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Date:   Sun, 14 Mar 2021 03:28:22 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Douglas Anderson <dianders@...omium.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Alexandru M Stan <amstan@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Rob Clark <robdclark@...omium.org>,
        Jeykumar Sankaran <jsanka@...eaurora.org>,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        Vara Reddy <varar@...eaurora.org>,
        Tanmay Shah <tanmay@...eaurora.org>,
        Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/13] arm64: dts: qcom: sc7180: Update dts for DP phy
 inside QMP phy

On 26/02/2021 01:12, Douglas Anderson wrote:
> From: Stephen Boyd <swboyd@...omium.org>
> 
> Drop the old node and add the new one in its place.
> 
> Cc: Stephen Boyd <swboyd@...omium.org>
> Cc: Jeykumar Sankaran <jsanka@...eaurora.org>
> Cc: Chandan Uddaraju <chandanu@...eaurora.org>
> Cc: Vara Reddy <varar@...eaurora.org>
> Cc: Tanmay Shah <tanmay@...eaurora.org>
> Cc: Rob Clark <robdclark@...omium.org>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> [dianders: Adjusted due to DP not itself not in upstream dts yet]
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---
> 
>   arch/arm64/boot/dts/qcom/sc7180.dtsi | 23 ++++++++++++++++-------
>   1 file changed, 16 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index 1ea3344ab62c..60248a6757d8 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -2770,12 +2770,11 @@ usb_1_hsphy: phy@...3000 {
>   		};
>   
>   		usb_1_qmpphy: phy-wrapper@...9000 {
> -			compatible = "qcom,sc7180-qmp-usb3-phy";
> +			compatible = "qcom,sc7180-qmp-usb3-dp-phy";
>   			reg = <0 0x088e9000 0 0x18c>,
> -			      <0 0x088e8000 0 0x38>;
> -			reg-names = "reg-base", "dp_com";
> +			      <0 0x088e8000 0 0x38>,

Technically this should be 0x3c. Offset 0x38 is USB3_DP_COM_REVISION_ID3 
(not used by the current driver though).

> +			      <0 0x088ea000 0 0x40>;

I think 0x40 is not enough here.
This is a serdes region and qmp_v3_dp_serdes_tbl contains registers 
0x148 and 0x154.

>   			status = "disabled";
> -			#clock-cells = <1>;
>   			#address-cells = <2>;
>   			#size-cells = <2>;
>   			ranges;
> @@ -2790,7 +2789,7 @@ usb_1_qmpphy: phy-wrapper@...9000 {
>   				 <&gcc GCC_USB3_DP_PHY_PRIM_BCR>;
>   			reset-names = "phy", "common";
>   
> -			usb_1_ssphy: phy@...9200 {
> +			usb_1_ssphy: usb3-phy@...9200 {
>   				reg = <0 0x088e9200 0 0x128>,
>   				      <0 0x088e9400 0 0x200>,
>   				      <0 0x088e9c00 0 0x218>,
> @@ -2803,6 +2802,16 @@ usb_1_ssphy: phy@...9200 {
>   				clock-names = "pipe0";
>   				clock-output-names = "usb3_phy_pipe_clk_src";
>   			};
> +
> +			dp_phy: dp-phy@...a200 {
> +				reg = <0 0x088ea200 0 0x200>,
> +				      <0 0x088ea400 0 0x200>,
> +				      <0 0x088eaa00 0 0x200>,
> +				      <0 0x088ea600 0 0x200>,
> +				      <0 0x088ea800 0 0x200>;
> +				#clock-cells = <1>;
> +				#phy-cells = <0>;
> +			};
>   		};
>   
>   		dc_noc: interconnect@...0000 {
> @@ -3166,8 +3175,8 @@ dispcc: clock-controller@...0000 {
>   				 <&gcc GCC_DISP_GPLL0_CLK_SRC>,
>   				 <&dsi_phy 0>,
>   				 <&dsi_phy 1>,
> -				 <0>,
> -				 <0>;
> +				 <&dp_phy 0>,
> +				 <&dp_phy 1>;
>   			clock-names = "bi_tcxo",
>   				      "gcc_disp_gpll0_clk_src",
>   				      "dsi0_phy_pll_out_byteclk",
> 


-- 
With best wishes
Dmitry