linux-kernel - Re: [PATCH 3/3] arm64: dts: qcom: sm8150: Add video clock controller node

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Date: Thu, 14 Mar 2024 14:50:20 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: "Satya Priya Kakitapalli (Temp)" <quic_skakitap@...cinc.com>
Cc: Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
	Conor Dooley <conor+dt@...nel.org>, Michael Turquette <mturquette@...libre.com>, 
	Stephen Boyd <sboyd@...nel.org>, Ajit Pandey <quic_ajipan@...cinc.com>, 
	Imran Shaik <quic_imrashai@...cinc.com>, Taniya Das <quic_tdas@...cinc.com>, 
	Jagadeesh Kona <quic_jkona@...cinc.com>, linux-arm-msm@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-clk@...r.kernel.org
Subject: Re: [PATCH 3/3] arm64: dts: qcom: sm8150: Add video clock controller node

On Thu, 14 Mar 2024 at 11:14, Satya Priya Kakitapalli (Temp)
<quic_skakitap@...cinc.com> wrote:
>
>
> On 3/14/2024 12:46 AM, Dmitry Baryshkov wrote:
> > On Wed, 13 Mar 2024 at 13:11, Satya Priya Kakitapalli
> > <quic_skakitap@...cinc.com> wrote:
> >> Add device node for video clock controller on Qualcomm
> >> SM8150 platform.
> >>
> >> Signed-off-by: Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
> >> ---
> >>   arch/arm64/boot/dts/qcom/sa8155p.dtsi |  4 ++++
> >>   arch/arm64/boot/dts/qcom/sm8150.dtsi  | 13 +++++++++++++
> >>   2 files changed, 17 insertions(+)
> >>
> >> diff --git a/arch/arm64/boot/dts/qcom/sa8155p.dtsi b/arch/arm64/boot/dts/qcom/sa8155p.dtsi
> >> index ffb7ab695213..9e70effc72e1 100644
> >> --- a/arch/arm64/boot/dts/qcom/sa8155p.dtsi
> >> +++ b/arch/arm64/boot/dts/qcom/sa8155p.dtsi
> >> @@ -38,3 +38,7 @@ &rpmhpd {
> >>           */
> >>          compatible = "qcom,sa8155p-rpmhpd";
> >>   };
> >> +
> >> +&videocc {
> >> +       power-domains = <&rpmhpd SA8155P_CX>;
> >> +};
> >> diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> >> index a35c0852b5a1..6573c907d7e2 100644
> >> --- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
> >> +++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> >> @@ -14,6 +14,7 @@
> >>   #include <dt-bindings/clock/qcom,dispcc-sm8150.h>
> >>   #include <dt-bindings/clock/qcom,gcc-sm8150.h>
> >>   #include <dt-bindings/clock/qcom,gpucc-sm8150.h>
> >> +#include <dt-bindings/clock/qcom,videocc-sm8150.h>
> >>   #include <dt-bindings/interconnect/qcom,osm-l3.h>
> >>   #include <dt-bindings/interconnect/qcom,sm8150.h>
> >>   #include <dt-bindings/thermal/thermal.h>
> >> @@ -3715,6 +3716,18 @@ usb_2_dwc3: usb@...0000 {
> >>                          };
> >>                  };
> >>
> >> +               videocc: clock-controller@...0000 {
> >> +                       compatible = "qcom,sm8150-videocc";
> >> +                       reg = <0 0x0ab00000 0 0x10000>;
> >> +                       clocks = <&rpmhcc RPMH_CXO_CLK>,
> >> +                                <&gcc GCC_VIDEO_AHB_CLK>;
> >> +                       power-domains = <&rpmhpd SM8150_MMCX>;
> >> +                       required-opps = <&rpmhpd_opp_low_svs>;
> > Should not be necessary anymore.
>
>
> Whenever the rail is turned on, we want to keep it in low_svs state
> instead of retention, hence added this property , please let me know why
> you think it is not needed?

See https://lore.kernel.org/linux-arm-msm/20240226-rpmhpd-enable-corner-fix-v1-1-68c004cec48c@quicinc.com/

>
>
> >> +                       #clock-cells = <1>;
> >> +                       #reset-cells = <1>;
> >> +                       #power-domain-cells = <1>;
> >> +               };
> >> +
> >>                  camnoc_virt: interconnect@...0000 {
> >>                          compatible = "qcom,sm8150-camnoc-virt";
> >>                          reg = <0 0x0ac00000 0 0x1000>;
> >>
> >> --
> >> 2.25.1
> >>
> >>
> >



-- 
With best wishes
Dmitry