linux-kernel - Re: [PATCH 3/4] arm64: dts: qcom: monaco-evk-camera: Add DT overlay

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Message-ID: <gd7allvjkgbmqgc6pazq5o5u62tdkrogpf2r43vfkqfsptzybk@66i2def6aumf>
Date: Thu, 11 Sep 2025 16:03:26 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Nihal Kumar Gupta <quic_nihalkum@...cinc.com>
Cc: Vikram Sharma <quic_vikramsa@...cinc.com>, bryan.odonoghue@...aro.org,
        mchehab@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, andersson@...nel.org, konradybcio@...nel.org,
        hverkuil-cisco@...all.nl, cros-qcom-dts-watchers@...omium.org,
        catalin.marinas@....com, will@...nel.org,
        linux-arm-kernel@...ts.infradead.org, quic_svankada@...cinc.com,
        linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ravi Shankar <quic_rshankar@...cinc.com>,
        Vishal Verma <quic_vishverm@...cinc.com>
Subject: Re: [PATCH 3/4] arm64: dts: qcom: monaco-evk-camera: Add DT overlay

On Thu, Sep 11, 2025 at 06:19:02PM +0530, Nihal Kumar Gupta wrote:
> 
> 
> On 11-09-2025 15:38, Dmitry Baryshkov wrote:
> > On Thu, Sep 11, 2025 at 02:49:59PM +0530, Nihal Kumar Gupta wrote:
> >>
> >> On 10-09-2025 12:33, Vikram Sharma wrote:
> >>> On 9/9/2025 7:31 PM, Dmitry Baryshkov wrote:
> >>>> On Tue, Sep 09, 2025 at 05:12:40PM +0530, Vikram Sharma wrote:
> >>>>> From: Nihal Kumar Gupta<quic_nihalkum@...cinc.com>
> >>>>>
> >>>>> Enable IMX577 sensor using the CCI1 interface on Monaco EVK.
> >>>>> Camera reset is controlled through an I2C expander,
> >>>>> and power supply is managed via tlmm GPIO74.
> >>>> Why is done as an overlay? Is it a seprate mezzanine?
> >>> It’s not a separate mezzanine; monaco-evk does not come with an attached camera 
> >>> sensor by default.
> >>> The overlay simply reflects an optional camera sensor attachment (e.g., IMX577 
> >>> on CSIPHY1)
> >>> That is why camera sensor is configured in monaco-evk-camera.dtso instead of 
> >>> modifying the base monaco-evk.dts.
> >>> Please suggest and alternative approach if you feel this is not correct
> >> Dmitry, Do you agree with this justification or you have a follow-up comment?
> >> Can we post v2 with the same change addressing other comments.
> > The previous email didn't land to the mailing list, I'm not sure why.
> > 
> > Anyway:
> > - What are other options that we might support? Having a single
> >   monaco-evk-camera overlay means that this is the only configuration
> >   that we plan to support.
> > 
> > - It all should have been described in the commit message. Please update
> >   it for the next revision.
> 
> Yes, We have planned to support device tree overlay of the IMX577 sensor via CSIPHY1 only.
> I'll update the commit message in v2

I'd still suggest monaco-evk-camera-imx577.dtso

-- 
With best wishes
Dmitry