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Fri, 24 Oct 2025 00:45:46 -0700 (PDT) Received: from [192.168.1.29] ([178.197.219.123]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-4298bd78c69sm5998825f8f.4.2025.10.24.00.45.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 24 Oct 2025 00:45:46 -0700 (PDT) Message-ID: Date: Fri, 24 Oct 2025 09:45:44 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/6] dt-bindings: remoteproc: qcom,sm8550-pas: Add Kaanapali CDSP To: Jingyi Wang , Dmitry Baryshkov Cc: Bjorn Andersson , Mathieu Poirier , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Manivannan Sadhasivam , Konrad Dybcio , linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, aiqun.yu@oss.qualcomm.com, tingwei.zhang@oss.qualcomm.com, trilok.soni@oss.qualcomm.com, yijie.yang@oss.qualcomm.com References: <20250924-knp-remoteproc-v1-0-611bf7be8329@oss.qualcomm.com> <20250924-knp-remoteproc-v1-2-611bf7be8329@oss.qualcomm.com> <5820a9a9-4474-4c4d-905c-0efd9442e5e1@oss.qualcomm.com> <540b1de6-c959-4911-925f-8163f5fa5147@oss.qualcomm.com> <7952ed3d-f019-4593-af43-b2df7f738d04@oss.qualcomm.com> <1f98f83f-328f-47c8-84e7-2c77abb37a6a@oss.qualcomm.com> <91288aa0-0088-4b50-8b33-661d8c0c25ae@gmail.com> Content-Language: en-US From: Krzysztof Kozlowski Autocrypt: addr=k.kozlowski.k@gmail.com; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 24/10/2025 09:42, Jingyi Wang wrote: > > > On 10/24/2025 3:28 PM, Krzysztof Kozlowski wrote: >> On 24/10/2025 04:10, Jingyi Wang wrote: >>>>> >>>>> Hi Krzysztof， >>>>> >>>>> I tested with falling back to sm8650 cdsp but it will fail with: >>>>> [ 4.739615] qcom_q6v5_pas 26300000.remoteproc: unable to resolve shareable memory-region index 0 >>>>> >>>>> sm8550 and kaanapali define 2 memory regions: >>>>> "memory-region = <&cdsp_mem>, <&q6_cdsp_dtb_mem>;" >>>>> >>>>> sm8650 and sm8750 define 3 memory regions: >>>>> "memory-region = <&cdsp_mem>, <&q6_cdsp_dtb_mem>, <&global_sync_mem>;" >>>>> with the driver: >>>>> >>>>> static const struct qcom_pas_data sm8650_cdsp_resource = { >>>>> .crash_reason_smem = 601, >>>>> .firmware_name = "cdsp.mdt", >>>>> .dtb_firmware_name = "cdsp_dtb.mdt", >>>>> <...> >>>>> .region_assign_idx = 2, >>>>> .region_assign_count = 1, >>>>> .region_assign_shared = true, >>>>> .region_assign_vmid = QCOM_SCM_VMID_CDSP, >>>>> }; >>>>> >>>>> When kaanapali fallback to sm8650 it cannot parse this region_assign_idx. >>>>> >>>>> So shall we still fallback to sm8550 or define a new node "kaanapali_cdsp_resource" >>>>> in the driver? >>>> >>>> And partially the point here is that you might need the third region, no? >>>> Best regards, >>>> Krzysztof >>> >>> On kaanapali, the global_sync_mem region is not managed by kernel, so it should >>> be removed. >> >> >> OK, then please mention this in the commit msg, so it is clear why this >> is not compatible with previous generation. >> >> Best regards, >> Krzysztof > > Sorry for being a bit verbose, but I would like to make it clear that we can still > use this fallback if we clarify it in the commit message, right? Yes, you can. Best regards, Krzysztof