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Message-ID: <45aa9656-dbbd-4c1e-89c4-a24ea5996ff1@oss.qualcomm.com>
Date: Wed, 24 Dec 2025 10:12:04 +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 12/24/2025 12:36 AM, Vladimir Zapolskiy wrote:
> On 12/23/25 04:16, Wenmeng Liu wrote:
>>
>>
>> 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.
>>
>
> Then to add the image sensor support please follow the model with DT
> overlays,
> and it means you shall get a schematics of the mezzanine to describe the
> attachable board.
>
> When you get the schematics, you will get a valid view on voltage
> distribution,
> sensor supplies will be derivatives from VBAT or S4A anyway, I believe.
>
> See sm8550-hdk-rear-camera-card.dtso or qrb5165-rb5-vision-
> mezzanine.dtso as
> the references.
>
yes, I think the module will distribute the supplies of S4A.
Thanks,
Wenmeng
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