linux-kernel - Re: [PATCH 1/2] dt-bindings: net: qcom,ipa: document qcm2290 compatible

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Message-ID: <7d33eed7-92ba-4cbb-89b0-9b7e894f1c94@oss.qualcomm.com>
Date: Fri, 20 Dec 2024 14:25:57 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Wojciech Slenska <wojciech.slenska@...il.com>,
        Andrew Lunn <andrew+netdev@...n.ch>,
        "David S . Miller"
 <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Alex Elder <elder@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: net: qcom,ipa: document qcm2290
 compatible

On 20.12.2024 8:35 AM, Wojciech Slenska wrote:
> Document that ipa on qcm2290 uses version 4.2, the same
> as sc7180.
> 
> Signed-off-by: Wojciech Slenska <wojciech.slenska@...il.com>
> ---

FWIW this needs some more work on the Linux side, the IPA driver
currently hardcodes a reference to IMEM, which has a different
base between these two SoCs.

The IMEM region doesn't seem to be used as of current, but things
will explode the second it is.

A long overdue update would be to make the IPA driver consume
a syscon/memory-region-like property pointing to IMEM (or a slice
of it, maybe Alex knows what it was supposed to be used for).

Konrad