linux-kernel - Re: [PATCH 3/3] arm64: dts: qcom: talos-evk-camera: Add DT overlay

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Message-ID: <a767acb3-8bb9-45f7-99a6-68a595e4ebb5@oss.qualcomm.com>
Date: Tue, 23 Dec 2025 10:16:25 +0800
From: Wenmeng Liu <wenmeng.liu@....qualcomm.com>
To: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
        Loic Poulain <loic.poulain@....qualcomm.com>,
        Robert Foss
 <rfoss@...nel.org>, Andi Shyti <andi.shyti@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org
Subject: Re: [PATCH 3/3] arm64: dts: qcom: talos-evk-camera: Add DT overlay



On 12/22/2025 11:45 PM, Vladimir Zapolskiy wrote:
> On 12/22/25 13:41, Wenmeng Liu wrote:
>>
>>
>> On 12/22/2025 7:19 PM, Vladimir Zapolskiy wrote:
>>> On 12/22/25 10:44, Wenmeng Liu wrote:
>>>> Enable IMX577 via CCI on Taloss EVK Core Kit.
>>>>
>>>> The Talos EVK board does not include a camera sensor
>>>> by default, this overlay reflects the possibility of
>>>> attaching an optional camera sensor.
>>>> For this reason, the camera sensor configuration is
>>>> placed in talos-evk-camera.dtso, rather than
>>>> modifying the base talos-evk.dts.
>>>>
>>>> Signed-off-by: Wenmeng Liu <wenmeng.liu@....qualcomm.com>
>>>> ---
>>>>    arch/arm64/boot/dts/qcom/Makefile              |  2 +
>>>>    arch/arm64/boot/dts/qcom/talos-evk-camera.dtso | 64 ++++++++++++++++
>>>> ++++++++++
>>>>    arch/arm64/boot/dts/qcom/talos.dtsi            | 21 +++++++++
>>>
>>> Please split QCS615 MCLK definitions change into a separate commit.
>> ACK.>
>>>>    3 files changed, 87 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/
>>>> qcom/Makefile
>>>> index
>>>> 60121f133078b2754f98e6f45a3db4031b478cc8..b1d85b1f4a94714f2a5c976d162482d70ae920f2 100644
>>>> --- a/arch/arm64/boot/dts/qcom/Makefile
>>>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>>>> @@ -325,7 +325,9 @@ dtb-$(CONFIG_ARCH_QCOM)    += sm8650-qrd.dtb
>>>>    dtb-$(CONFIG_ARCH_QCOM)    += sm8750-mtp.dtb
>>>>    dtb-$(CONFIG_ARCH_QCOM)    += sm8750-qrd.dtb
>>>>    dtb-$(CONFIG_ARCH_QCOM)    += talos-evk.dtb
>>>> +talos-evk-camera-dtbs        := talos-evk.dtb talos-evk-camera.dtbo
>>>>    talos-evk-lvds-auo,g133han01-dtbs    := talos-evk.dtb talos-evk-
>>>> lvds-auo,g133han01.dtbo
>>>> +dtb-$(CONFIG_ARCH_QCOM)    += talos-evk-camera.dtb
>>>>    dtb-$(CONFIG_ARCH_QCOM)    += talos-evk-lvds-auo,g133han01.dtb
>>>>    x1e001de-devkit-el2-dtbs    := x1e001de-devkit.dtb x1-el2.dtbo
>>>>    dtb-$(CONFIG_ARCH_QCOM)    += x1e001de-devkit.dtb x1e001de-devkit-
>>>> el2.dtb
>>>> diff --git a/arch/arm64/boot/dts/qcom/talos-evk-camera.dtso b/arch/
>>>> arm64/boot/dts/qcom/talos-evk-camera.dtso
>>>> new file mode 100644
>>>> index
>>>> 0000000000000000000000000000000000000000..ae1a02295b4dc48212aad40980a329ff458fe69a
>>>> --- /dev/null
>>>> +++ b/arch/arm64/boot/dts/qcom/talos-evk-camera.dtso
>>>> @@ -0,0 +1,64 @@
>>>> +// SPDX-License-Identifier: BSD-3-Clause
>>>> +/*
>>>> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
>>>
>>> Please add a missing year of the change.
>> Now our requirement is a yearless copyright.>
> 
> Ack. It's a lawyers' domain anyway.
> 
>>>> + */
>>>> +
>>>> +/dts-v1/;
>>>> +/plugin/;
>>>> +
>>>> +#include <dt-bindings/clock/qcom,qcs615-camcc.h>
>>>> +#include <dt-bindings/gpio/gpio.h>
>>>> +
>>>> +&camss {
>>>> +    vdd-csiphy-1p2-supply = <&vreg_l11a>;
>>>> +    vdd-csiphy-1p8-supply = <&vreg_l12a>;
>>>> +
>>>> +    status = "okay";
>>>> +
>>>> +    ports {
>>>> +        #address-cells = <1>;
>>>> +        #size-cells = <0>;
>>>> +
>>>> +        port@1 {
>>>> +            reg = <1>;
>>>> +
>>>> +            csiphy1_ep: endpoint {
>>>> +                clock-lanes = <7>;
>>>
>>> Please remove 'clock-lanes' property.
>> ACK.>
>>>> +                data-lanes = <0 1 2 3>;
>>>> +                remote-endpoint = <&imx577_ep1>;
>>>> +            };
>>>> +        };
>>>> +    };
>>>> +};
>>>> +
>>>> +&cci {
>>>> +    status = "okay";
>>>> +};
>>>> +
>>>> +&cci_i2c1 {
>>>> +    #address-cells = <1>;
>>>> +    #size-cells = <0>;
>>>> +
>>>> +    camera@1a {
>>>> +        compatible = "sony,imx577";
>>>> +        reg = <0x1a>;
>>>> +
>>>> +        reset-gpios = <&tlmm 29 GPIO_ACTIVE_LOW>;
>>>> +        pinctrl-0 = <&cam2_default>;
>>>> +        pinctrl-names = "default";
>>>> +
>>>> +        clocks = <&camcc CAM_CC_MCLK2_CLK>;
>>>> +        assigned-clocks = <&camcc CAM_CC_MCLK2_CLK>;
>>>> +        assigned-clock-rates = <24000000>;
>>>> +
>>>> +        avdd-supply = <&vreg_s4a>;
>>>
>>> Just one voltage supply?
>> yes, 22pin camera module only have one pin for power.>
> 
> It's common that mezzanine boards are supplied with power from S4A or VBAT,
> I've never seen a camera module supplied with just one voltage regulator,
> that's why it attracts attention.
> 
> What is a camera module here, is it on an attachable vision mezzanine like
> on RBx series or a part of Talos EVK PCB like on QRD series?
> 
> If it is a mezzanine, the support of mezzanine boards should be done as
> a DT overlay.
> 

It`s like RBx series, does not include a camera sensor
by default.

Thanks,
Wenmeng