linux-kernel - Re: [PATCH] slimbus: qcom: remove unused qcom controller driver

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Message-Id: <DBNKVU7OQHNL.12Z6O3PI6SHGU@fairphone.com>
Date: Mon, 28 Jul 2025 11:24:49 +0200
From: "Luca Weiss" <luca.weiss@...rphone.com>
To: "Dmitry Baryshkov" <dmitry.baryshkov@....qualcomm.com>, "Konrad Dybcio"
 <konrad.dybcio@....qualcomm.com>
Cc: <srinivas.kandagatla@....qualcomm.com>, <srini@...nel.org>,
 <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
 <linux-arm-msm@...r.kernel.org>, <linux-sound@...r.kernel.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] slimbus: qcom: remove unused qcom controller driver

Hi all,

On Thu Jul 24, 2025 at 4:24 PM CEST, Dmitry Baryshkov wrote:
> On Thu, Jul 24, 2025 at 03:31:50PM +0200, Konrad Dybcio wrote:
>> On 7/24/25 3:28 PM, srinivas.kandagatla@....qualcomm.com wrote:
>> > From: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
>> > 
>> > Qcom Slimbus controller driver is totally unused and dead code, there is
>> > no point in keeping this driver in the kernel without users.
>> > 
>> > This patch removes the driver along with device tree bindings.
>> > 
>> > Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
>> > ---
>> 
>> I *thiiink* this is apq806x code, with 8974 adopting the new hw.
>> 
>> +Dmitry, does you computer history museum require this driver?
>
> I never had time to try enabling audio on IFC6410 nor Nexus 7. But if
> the driver would be actually useable there, I'd prefer to keep it.

FWIW on the WIP msm8974 audio branch (from years ago, unfortunately), I
don't see "qcom,slim" compatible being used, also with no change to
drivers/slimbus/qcom-ctrl.c.

That branch is using the compatible "qcom,slim-ngd-v1.5.0" for MSM8974.

So at least for my museum collection, it's not needed.

Regards
Luca