linux-kernel - Re: [PATCH v2 15/22] wifi: ath12k: add BDF address in hardware parameter

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Message-ID: <0796510c-20bd-4a81-bd60-40aacbcf61c0@quicinc.com>
Date: Tue, 3 Dec 2024 14:48:58 +0530
From: Raj Kumar Bhagat <quic_rajkbhag@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        <ath12k@...ts.infradead.org>
CC: <linux-wireless@...r.kernel.org>, Kalle Valo <kvalo@...nel.org>,
        "Rob
 Herring" <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        "Conor
 Dooley" <conor+dt@...nel.org>,
        Jeff Johnson <jjohnson@...nel.org>,
        "Bjorn
 Andersson" <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v2 15/22] wifi: ath12k: add BDF address in hardware
 parameter

On 11/4/2024 7:46 PM, Konrad Dybcio wrote:
> On 15.10.2024 8:26 PM, Raj Kumar Bhagat wrote:
>> The Ath2k AHB device (IPQ5332) firmware requests BDF_MEM_REGION_TYPE
>> memory during QMI memory requests. This memory is part of the
>> HOST_DDR_REGION_TYPE. Therefore, add the BDF memory address to the
>> hardware parameter and provide this memory address to the firmware
>> during QMI memory requests.
> 
> Sounds like something to put in the device tree, no?
> 

This BDF memory address is the RAM offset. We did add this in device tree in
version 1. This is removed from device tree in v2 based on the review comment that
DT should not store RAM offset.

refer below link:
Link: https://lore.kernel.org/all/f8cd9c3d-47e1-4709-9334-78e4790acef0@kernel.org/