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Mon, 26 Oct 2026 08:23:21 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c46bd64f8c4sm335085266b.47.2026.10.26.08.23.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 26 Oct 2026 08:23:20 -0700 (PDT) Message-ID: Date: Mon, 26 Oct 2026 16:23:18 +0100 X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 1/2] arm64: dts: qcom: qcm6490-idp/qcs6490-rb3gen2: Keep wlan_ce_mem and drop redundant wifi memory-region To: Mukesh Ojha Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260803121042.3313824-1-mukesh.ojha@oss.qualcomm.com> <20260803121042.3313824-2-mukesh.ojha@oss.qualcomm.com> <23370124-adb0-4b9f-a818-0a864a291099@oss.qualcomm.com> <20260920075457.ftpkl6bpuktom2be@hu-mojha-hyd.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260920075457.ftpkl6bpuktom2be@hu-mojha-hyd.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI2MDA2MSBTYWx0ZWRfX/f8yAAXv97IQ YUBZ131wZy7xdte4ZuGvQcpcOT2LjCiQlt7U7GahZhZFYNZUmx3L3Aa8dRrZ2Sgo2VgRB37pUbg 3LqKaOS0mSnplJRfHVdD8KKotNoxGzs= X-Authority-Analysis: v=2.4 cv=eMeGH3p1 c=1 sm=1 tr=0 ts=6adf706a cx=c_pps a=R6oCqFB+Yf/t2GF8e0/dFg==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=EUspDBNiAAAA:8 a=-OgLTNqWArPnvb7kmGEA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=TD8TdBvy0hsOASGTdmB-:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI2MDA2MSBTYWx0ZWRfX8wXblBUvf+Mt oDruxI6p7cTn7o9v1VkONfKDSFB49mTPfosMMNBKG3rb2Niy8MqUhhQWgbpBWT1xcPugiFEHsWJ ytu9VGOafugbmqUBC3d+S9BzgJhf8DR+s8n9hhxxAcneEdSFI1tvPavF0XZcsybLJGX3zrPrvGj m/9aGQY1upuA+3xIMEcihtV7BhwXZHy3e1VGAizVvcFHnq5mBexiH/T65bbkXr/y/PWy1hXsXVF xRvKr8RDJ/EPJDHla+2yHAsV4m5wx1XMYvkvo9klO6JRd9IzjEL+Df1HMV4KkIXpQ+E1rdGaBZU L2lmvX9yQqkgybR4ZruIXHvJhY2tDqM4/fZlHPpubIgV2oxPU4S8MDsfFlww1eiQ4hrTJ64jeqW FGTfOOrK8f7UHmutbn6HZ8Xfm/607ISpX/7WXbVHtuOdhxkK5A11/CZWPXEhEr/4n32MeCvyA33 Ko5SUa8uX2Tyu1sSaEw== X-Proofpoint-GUID: IGoO2OjrN2gpx_gypnep95wB2Qmyu2EU X-Proofpoint-ORIG-GUID: IGoO2OjrN2gpx_gypnep95wB2Qmyu2EU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-26_03,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 malwarescore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 phishscore=0 priorityscore=1501 adultscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610260061 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