linux-kernel - Re: [PATCH v2 07/13] media: qcom: camss: Use >= CAMSS_SDM845 for vfe_get/vfe

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Date:   Fri, 18 Aug 2023 14:28:48 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>, rfoss@...nel.org,
        todor.too@...il.com, agross@...nel.org, andersson@...nel.org,
        mchehab@...nel.org, hverkuil-cisco@...all.nl,
        laurent.pinchart@...asonboard.com, sakari.ailus@...ux.intel.com,
        andrey.konovalov@...aro.org
Cc:     linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 07/13] media: qcom: camss: Use >= CAMSS_SDM845 for
 vfe_get/vfe_put

On 17.08.2023 16:38, Bryan O'Donoghue wrote:
> From sdm845 onwards we need to ensure the VFE is powered on prior to
> switching on the CSID.
> 
> Alternatively we could model up the GDSCs and clocks the CSID needs
> without the VFE but, there's a real question of the legitimacy of such a
> use-case.
> 
> For now drawing a line at sdm845 and switching on the associated VFEs is
> a perfectly valid thing to do.
> 
> Rather than continually extend out this clause for at least two new SoCs
> with this same model - making the vfe_get/vfe_put path start to look
> like spaghetti we can simply test for >= sdm845 here.
> 
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
> ---
Using >= here is veeery arbitrary and depends on the next person
adding a SoC in chronological, or used-tech-chronological order
correctly.. Not a fan!

Konrad