linux-kernel - Re: [PATCH 7/7] arm64: dts: qcom: apq8016-sbc: Enable camss for non-mezzanine cases

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Message-ID: <964f5f05-a675-bea4-e15f-d73396313855@linaro.org>
Date:   Wed, 9 Aug 2023 14:46:32 +0100
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, agross@...nel.org,
        andersson@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        loic.poulain@...aro.org, rfoss@...nel.org
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/7] arm64: dts: qcom: apq8016-sbc: Enable camss for
 non-mezzanine cases

On 09/08/2023 13:11, Konrad Dybcio wrote:
> On 9.08.2023 14:04, Bryan O'Donoghue wrote:
>> When we have no camera mezzanine attached it is still possible to run the
>> test-pattern generator of the CSID block.
> Wasn't it broken?
> 
> [...]
> 

So, running the TPG without the mezzaine has always been possible but, 
with the hard-coded sensor you'd fail to probe and never get user-space 
enumeration.

The fix is moving the sensor portion to its own mezzanine and enabling 
camss standalone.

I'll make that clearer in the log for V2.

Thx for the review.

---
bod