linux-kernel - Re: [PATCH v3 5/5] arm64: dts: qcom: talos-evk-camera: Add DT overlay

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Message-ID: <e081fa74-9e0b-4e54-a51d-eee97ae6f4fa@linaro.org>
Date: Fri, 16 Jan 2026 11:42:51 +0200
From: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>
To: Wenmeng Liu <wenmeng.liu@....qualcomm.com>,
 Loic Poulain <loic.poulain@....qualcomm.com>,
 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>, Robert Foss <rfoss@...nel.org>,
 Todor Tomov <todor.too@...il.com>,
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>
Cc: linux-i2c@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-media@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 5/5] arm64: dts: qcom: talos-evk-camera: Add DT overlay

On 1/16/26 11:32, Wenmeng Liu wrote:
> 
> 
> On 1/16/2026 5:12 PM, Vladimir Zapolskiy wrote:
>> On 1/15/26 12:12, 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 DTSO has enabled the Arducam 12.3MP
>>> IMX577 Mini Camera Module on the CSI-1 interface.
>>>
>>> Signed-off-by: Wenmeng Liu <wenmeng.liu@....qualcomm.com>
>>> ---
>>>    arch/arm64/boot/dts/qcom/Makefile                  |  3 ++
>>>    .../boot/dts/qcom/talos-evk-camera-imx577.dtso     | 63 ++++++++++++
>>> ++++++++++
>>>    2 files changed, 66 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/
>>> qcom/Makefile
>>> index
>>> 00652614e73582fa9bd5fbeff4836b9496721d2d..be9aeff2cd1555bc436e1b8eb78d8e1c9b84f9c4 100644
>>> --- a/arch/arm64/boot/dts/qcom/Makefile
>>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>>> @@ -339,8 +339,11 @@ 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
>>> +dtbo-$(CONFIG_ARCH_QCOM)    += talos-evk-camera-imx577.dtbo
>>
>> Please remind me, what does dtbo-y Makefile target serve for?
> Rob mentioned:
> https://lore.kernel.org/all/20260106192609.GA2581379-robh@kernel.org/

It'd be better to ask Rob about it, I suppose that the concern may be about
a missing in the qcom/Makefile mechanism to build standalone .dtbo artefacts.

> I checked, dtbo- is not an upstream usage, it will be updated form

Right, that's why it attracted the attention.

> dtbo-$(CONFIG_ARCH_QCOM) to dtb-$(CONFIG_ARCH_QCOM) in the next version.
> 

But...

>>> +talos-evk-camera-imx577-dtbs    := talos-evk.dtb talos-evk-camera-
>>> imx577.dtbo
>>>    talos-evk-lvds-auo,g133han01-dtbs    := \
>>>        talos-evk.dtb talos-evk-lvds-auo,g133han01.dtbo
>>> +dtb-$(CONFIG_ARCH_QCOM)    += talos-evk-camera-imx577.dtb

it's already here and it was here in the previous version.

-- 
Best wishes,
Vladimir