From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Cc: Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v11 1/2] arm64: dts: qcom: qcm6490-idp/qcs6490-rb3gen2: Keep wlan_ce_mem and drop redundant wifi memory-region
Date: Mon, 26 Oct 2026 16:23:18 +0100 [thread overview]
Message-ID: <a2477a12-6259-4e1e-ad4e-e2fe41aeae1f@oss.qualcomm.com> (raw)
In-Reply-To: <20260920075457.ftpkl6bpuktom2be@hu-mojha-hyd.qualcomm.com>
On 9/20/26 9:54 AM, Mukesh Ojha wrote:
> On Tue, Aug 25, 2026 at 11:32:49AM +0200, Konrad Dybcio wrote:
>> On 8/3/26 2:10 PM, Mukesh Ojha wrote:
>>> The reserved region wlan_ce_mem is device memory used by the WCN6750
>>> firmware. Deleting it in qcm6490-idp.dts and qcs6490-rb3gen2.dts is
>>> erroneous — the region must remain present regardless of whether the
>>> underlying OS uses it — so drop the /delete-node/ &wlan_ce_mem; from
>>> both board files.
>>
>> But it starts below 0x8000_0000 where RAM starts, so it shouldn't really
>> matter, no?
>
> This region is used by the WLAN driver when Linux is at EL2, and similar to
> Kodiak Chrome, Kodiak IOT also needs to use it.
Right, it's a sneaky iommu_map
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
next prev parent reply other threads:[~2026-10-26 15:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-03 12:10 [PATCH v11 0/2] arm64: dts: qcom: kodiak: EL2 overlay for qcm6490-idp / qcs6490-rb3gen2 Mukesh Ojha
2026-08-03 12:10 ` [PATCH v11 1/2] arm64: dts: qcom: qcm6490-idp/qcs6490-rb3gen2: Keep wlan_ce_mem and drop redundant wifi memory-region Mukesh Ojha
2026-08-25 9:32 ` Konrad Dybcio
2026-09-20 7:54 ` Mukesh Ojha
2026-10-26 15:23 ` Konrad Dybcio [this message]
2026-08-03 12:10 ` [PATCH v11 2/2] arm64: dts: qcom: kodiak: Add EL2 overlay Mukesh Ojha
2026-10-26 16:18 ` [PATCH v11 0/2] arm64: dts: qcom: kodiak: EL2 overlay for qcm6490-idp / qcs6490-rb3gen2 Abel Vesa
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