linux-kernel - Re: [PATCH 1/3] dt-bindings: interconnect: add clocks property to enable QoS on sa8775p

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Message-ID: <6e036d6a-f2d1-43d6-bb35-54467edd7ec9@kernel.org>
Date: Thu, 28 Aug 2025 20:20:36 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Odelu Kukatla <odelu.kukatla@....qualcomm.com>,
 Georgi Djakov <djakov@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>
Cc: Raviteja Laggyshetty <quic_rlaggysh@...cinc.com>,
 Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
 linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Mike Tipton <mike.tipton@....qualcomm.com>
Subject: Re: [PATCH 1/3] dt-bindings: interconnect: add clocks property to
 enable QoS on sa8775p

On 28/08/2025 20:16, Odelu Kukatla wrote:
> 
>>> QoS configuration is essential for managing latency and bandwidth across
>>> subsystems such as CPU, GPU, and multimedia engines. Without it, the
>>> system may experience performance degradation, especially under
>>
>> So how was it working for the last 2 years?
>>
> The system may function normally without this feature. However, enabling


Huh? So you agree but keep continuing the discussion?

I don't understand what we are discussing in such case, but just to
close the topic from my side and be explicit: based on above you cannot
break the ABI.


> QoS helps optimize latency and bandwidth across subsystems like CPU,
> GPU, and multimedia engines, which becomes important in high-throughput
> scenarios.

No one discussed that.


Best regards,
Krzysztof