linux-kernel - Re: [PATCH v2 0/3] Add CAMSS support for SM6350

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Message-Id: <DE8JJCQA0C4Q.35NEED7XG0K0V@fairphone.com>
Date: Fri, 14 Nov 2025 16:59:25 +0100
From: "Luca Weiss" <luca.weiss@...rphone.com>
To: "Bryan O'Donoghue" <bod@...nel.org>, "Luca Weiss"
 <luca.weiss@...rphone.com>, "Robert Foss" <rfoss@...nel.org>, "Todor Tomov"
 <todor.too@...il.com>, "Vladimir Zapolskiy"
 <vladimir.zapolskiy@...aro.org>, "Mauro Carvalho Chehab"
 <mchehab@...nel.org>, "Rob Herring" <robh@...nel.org>, "Krzysztof
 Kozlowski" <krzk+dt@...nel.org>, "Conor Dooley" <conor+dt@...nel.org>,
 "Bryan O'Donoghue" <bryan.odonoghue@...aro.org>, "Bjorn Andersson"
 <andersson@...nel.org>, "Konrad Dybcio" <konradybcio@...nel.org>
Cc: <~postmarketos/upstreaming@...ts.sr.ht>, <phone-devel@...r.kernel.org>,
 <linux-arm-msm@...r.kernel.org>, <linux-media@...r.kernel.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/3] Add CAMSS support for SM6350

On Fri Nov 14, 2025 at 4:51 PM CET, Bryan O'Donoghue wrote:
> On 14/11/2025 11:15, Luca Weiss wrote:
>> Add bindings, driver and dts to support the Camera Subsystem on the
>> SM6350 SoC.
>> 
>> These patches were tested on a Fairphone 4 smartphone with WIP sensor
>> drivers (Sony IMX576 and IMX582), the camera pipeline works properly as
>> far as I can tell.
>> 
>> Though when stopping the camera stream, the following clock warning
>> appears in dmesg. But it does not interfere with any functionality,
>> starting and stopping the stream works and debugcc is showing 426.4 MHz
>> while the clock is on, and 'off' while it's off.
>> 
>> Any suggestion how to fix this, is appreciated.
>> 
>> [ 5738.590980] ------------[ cut here ]------------
>> [ 5738.591009] gcc_camera_axi_clk status stuck at 'on'
>> [ 5738.591049] WARNING: CPU: 0 PID: 6918 at drivers/clk/qcom/clk-branch.c:87 clk_branch_toggle+0x170/0x190
>
> Do you have a full and complete kernel tree we could look at here ?

Sure, this branch has everything in:

https://github.com/sm6350-mainline/linux/tree/sm6350-6.17.y/

For further refence, at least two other people have tested this branch
in postmarketOS, nothing particularly exciting to report from there,
apart from that the sdm-skin-thermal thermal zone (thermistor right next
to SoC) is currently configured with 55 degC as critical trip, which is
quickly achieved when starting a video recording, but that's not really
an issue with camss, but will need some tweaking regardless.

https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7281

Regards
Luca

>
> ---
> bod