linux-kernel - Re: [PATCH v4 3/3] media: qcom: camss: Add MSM8953 resources

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Message-ID: <c09f206bee80d2c3d632ef07a5d17e4c@mainlining.org>
Date: Wed, 13 Nov 2024 11:58:32 +0100
From: barnabas.czeman@...nlining.org
To: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Cc: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>, Robert Foss
 <rfoss@...nel.org>, Todor Tomov <todor.too@...il.com>, Mauro Carvalho Chehab
 <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
 linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, Vladimir Lypak
 <vladimir.lypak@...il.com>
Subject: Re: [PATCH v4 3/3] media: qcom: camss: Add MSM8953 resources

On 2024-11-13 10:53, Bryan O'Donoghue wrote:
> On 13/11/2024 08:01, barnabas.czeman@...nlining.org wrote:
>>> I see that you do reuse csiphy_res_8x16 for this platform support, in
>>> this case let me ask you to double check/test that the "vdda" 
>>> regulator
>>> is actually a CSIPHY regulator, and if so, please move the 
>>> registration
>>> of the regulators to csiphy_res_8x16 as a preceding change.
>> It is placed in CSID at downstream and this is the documentation of
>> the downstream property:
>> - qcom,mipi-csi-vdd-supply : should contain regulator to be used for
>>      this csid core
>> so it should be a csid regulator as i understand.
>> It is also placed at CSIDs in msm8953-camera.dtsi
> 
> No, the regulator(s) supply voltage to the PHY.
On sm8250 it is for csiphy but on older soc like on msm8953, msm8917, 
msm8916
this regulator is placed in csid nodes.
https://git.codelinaro.org/clo/la/kernel/msm-4.9/-/blob/LA.UM.10.6.2.c26-01500-89xx.0/arch/arm64/boot/dts/qcom/msm8953-camera.dtsi#L96
There is no regulator in csiphy nodes only PM domains.
I will check later move the regulator to the csiphy.
> 
> Make sure you have:
> 
> commit 44fdbb9d1a3892db92b2c9cf5f46e32ca4095d92
> Author: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>
> Date:   Fri Sep 27 00:19:56 2024 +0300
> 
>     media: qcom: camss: add management of supply regulators to CSIPHY
> 
> and give the change a try.
> 
> ---
> bod