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Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v9dS6-00000006g1K-0Faa; Fri, 17 Oct 2025 05:56:34 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v9dS4-00000006g0y-1vEx for linux-arm-kernel@lists.infradead.org; Fri, 17 Oct 2025 05:56:32 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id D2E50641F4; Fri, 17 Oct 2025 05:56:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 673EEC4CEE7; Fri, 17 Oct 2025 05:56:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760680591; bh=4YH6OZuA68MNhkYsl11u2esv7u7rPnkDbaFh+/r273g=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CLn1tUFlVmQvHnhC8Y2xAiwDfmDYNE6LDnIhjKlpo0D/gIHPNFP37ldtcR4xkvvDO mB5Oh9Opjxu5aslNztgqmmtj2+4YJre/1Ey22I/jQ6U9OBS++EUY5VRwcKdr0UxBcg BAksnZ2faaLFNzw+9Z2PA4BdztqQD5OH5FJuN1ZtUZ9KYOJfmExXBKn49FbeaZruLg bOafBUnThGkv/azL8F664fCwnHLD1I+U1WSou0sYb00ccZ6ealcZcs07Jm68SJjjEm +ohMkgleViBMw72zO3Ecwho9I9bJVmW5RO5haKOdMmQx2KHyN5o8fUuPbJ8SwmEx79 GX241RYobOfLQ== Message-ID: <03ac36fb-a227-438e-bdf6-f787e26008b3@kernel.org> Date: Fri, 17 Oct 2025 07:56:27 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: defconfig: Change CONFIG_SM_TCSRCC_8750 from m to y To: Taniya Das , Taniya Das , Bjorn Andersson , linux-arm-msm@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Ajit Pandey , Imran Shaik , Jagadeesh Kona , linux-kernel@vger.kernel.org References: <20251017-update_defconfig_tcsrcc_sm8750-v1-1-34b1b47a0bda@oss.qualcomm.com> <30390038-0f90-48a4-befe-475cf88ba1fb@kernel.org> <37f54b76-a274-4ce2-aaa9-88ba0eb84199@oss.qualcomm.com> <90c8dda3-f753-43dc-8bb9-d03a808c8704@kernel.org> <38b8468f-5006-46a3-a4ea-28e6692ef14a@quicinc.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 17/10/2025 07:49, Taniya Das wrote: > > > On 10/17/2025 10:51 AM, Krzysztof Kozlowski wrote: >> On 17/10/2025 07:16, Taniya Das wrote: >>> >>> >>> On 10/17/2025 10:00 AM, Krzysztof Kozlowski wrote: >>>> On 16/10/2025 20:53, Taniya Das wrote: >>>>> The TCSR clock controller is required during boot to provide the ref >>>>> clocks to the UFS controller. Setting CONFIG_SM_TCSRCC_8750 to y ensures >>>>> the UFS driver successfully probe and initialize the device. >>>>> >>>>> Without this change, the UFS subsystem fails to mount as a usable file >>>>> system during boot. >>>> >>>> >>>> That's not what I observed. UFS works fine, especially that it is a >>>> module, so no, this is not a desired change and explanation is not only >>>> insufficient but actually incorrect. >>>> >>> >>> Krzysztof, on Pakala MTP we are observing the below issue and it >>> requires the module of tscrcc to be loaded explicitly. This patch also >>> aligns to how it is on all other targets. >>> >>> /soc@0/phy@1d80000: Failed to get clk index: 2 ret: -517 >>> [ 10.496570] ufshcd-qcom 1d84000.ufs: freq-table-hz property not specified >>> [ 10.503660] ufshcd-qcom 1d84000.ufs: ufshcd_populate_vreg: Unable to >>> find vdd-hba-supply regulator, assuming enabled >>> [ 10.514548] ufshcd-qcom 1d84000.ufs: ufshcd_populate_vreg: Unable to >>> find vccq2-supply regulator, assuming enabled >>> [ 10.565955] platform 1d80000.phy: deferred probe pending: (reason >>> unknown) >>> [ 10.573078] platform 1d84000.ufs: deferred probe pending: >>> ufshcd-qcom: ufshcd_pltfrm_init() failed >>> >> >> >> I don't and I am testing regularly, so I assume you have incorrect >> config. Maybe I have incorrect one (which works), but then commit msg is >> incomplete - you must explain the bug and provide proof that this is the >> correct fix for it. >> > > We have tried booting up recently and and that is what we observed. The > patch from 'm' to 'y' helps the UFS probe is successful and the rootfs > is picked from ufs partitions. I will add these fail & success log > snippets in the commit text. That's not enough. You need to explain why UFS fails. After explaining this, I guess bug in UFS would be exposed thus that one should be fixed. You just provided band-aid without fixing the real problem. NAK > > [ 0.000000] Machine model: Qualcomm Technologies, Inc. SM8750 MTP > .... > [ 3.133373] ufshcd-qcom 1d84000.ufs: freq-table-hz property not specified > [ 3.144480] ufshcd-qcom 1d84000.ufs: ufshcd_populate_vreg: Unable to > find vdd-hba-supply regulator, assuming enabled > [ 3.144585] ufshcd-qcom 1d84000.ufs: ufshcd_populate_vreg: Unable to > find vccq2-supply regulator, assuming enabled > [ 3.227770] ufshcd-qcom 1d84000.ufs: Resource ufs_mem not provided > [ 3.238319] ufshcd-qcom 1d84000.ufs: MCQ mode is disabled, err=-19 Best regards, Krzysztof