linux-kernel - Re: [PATCH v6 2/5] dt-bindings: media: Add qcom,x1e80100-camss

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Message-ID: <e7a229f9-b02a-4979-b609-ef5e478fe9c6@linaro.org>
Date: Thu, 24 Apr 2025 22:10:29 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Robert Foss <rfoss@...nel.org>,
 Todor Tomov <todor.too@...il.com>, Mauro Carvalho Chehab
 <mchehab@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-media@...r.kernel.org,
 Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>
Subject: Re: [PATCH v6 2/5] dt-bindings: media: Add qcom,x1e80100-camss

On 24/04/2025 21:08, Konrad Dybcio wrote:
>> The Test Pattern Generators - TPGs would then also fit into this new model for the PHYs.
> Maybe we could consider modeling various camss subdevices as separate DT nodes,
> perhaps on some sort of a `camss` simple-pm-bus or something alike

I hadn't though of that specifically, call it option 0.

I had been thinking of

1. Doing like venus with a subdevice based on a compat
2. Doing it like DPU PHYs and just moving everything into drivers/phy

The fact that the CSIPHYs are technically inside of the CAMSS 
collapsible power-domain seem to mitigate against option 2.

---
bod