From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CD34239C657; Fri, 17 Apr 2026 08:14:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776413668; cv=none; b=qXEFB5G9FE5j1VefzCuBzXK+oT+evjRNfacy0/59klS9N7tRREIZyS8dTq6n+wQnDyREle8w9Kpf0GJ2X6zk9kHeI7RvhcRRwsQwYhIJRDOksmP25FPJWZfHBVN35EdM9qR5ikGNC943XQuRiSYr8DbrBTlPyvpMNNHCWOcy5rY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776413668; c=relaxed/simple; bh=2ABDoDxvTVOqFf9qjcN1w2UpWjo/jjMBQGtIn1ihnT0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=hT0t7ZCRVeFXvvlOSkBkWQ7TBZAEkpVYjHwNRHwTC7ZM1xvs2s3EYS6S/7+Vo1THbePkWHF7JB4uxK3T4omGyIHKXYh4LGllW15Kph6qKevs9XX/sa4NUEWvgxfjxOopr8np35O+4ITcclhza7v7fI1ZuVyIxnG8S/NcoPifTSo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=froOva9a; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="froOva9a" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 206F9C19425; Fri, 17 Apr 2026 08:14:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776413668; bh=2ABDoDxvTVOqFf9qjcN1w2UpWjo/jjMBQGtIn1ihnT0=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=froOva9a2Rdg/YUq3RSzo8UV/WabrtytmtlnSHTUm+fU/IWcsApuVodFl6WCVYBb+ x2OUmIbLflUfbe6t7cYfioaFizCJiwqN5I3/ZoBzT7tCNoGWJemjpNHmXK1705rK60 ncI+jJv57mA5HAnz3bOwjH8BRifhx3R0zbbsyV9iIO0tkBFEIcw5HRbxULs8oSyiHK TKMIZ3PsdWH4UsGXszgmBxDsmWThUHfYK0YFRKo5+PrhicIWc3BGnpEMwNAoxoxTEJ yc7i7JO4IlI6y/mMfRJJtPEqMwFb/g/fvMvOi1V9LjzAZctjLMF9rbHMMiMLHeztEt FGRcLebHIutdQ== Message-ID: <898874b3-fb73-4a46-b440-6ea3377c2f2d@kernel.org> Date: Fri, 17 Apr 2026 10:14:23 +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] arm64: defconfig: Enable Qualcomm UFS and QMP UFS PHY drivers as built-in To: Shawn Guo , Bjorn Andersson Cc: Konrad Dybcio , Krzysztof Kozlowski , Dmitry Baryshkov , Arnd Bergmann , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260417035509.1021860-1-shengchao.guo@oss.qualcomm.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 17/04/2026 05:55, Shawn Guo wrote: > UFS is the primary storage for Linux rootfs across the breadth of > Qualcomm development boards - Mobile, Automotive and IoT. With > Qualcomm UFS host controller driver (SCSI_UFS_QCOM) and the UFS PHY > driver (PHY_QCOM_QMP_UFS) as modules, developers need an initramfs Yes, you always need initramfs and every developer has it. > to boot from UFS, which adds friction to daily development workflows. No friction, it's both standard, easy and all of Qualcomm and Linaro developers have it solved long time ago. > Promote both to built-in to allow booting directly from UFS without > an initramfs. > > PHY_QCOM_QMP is a menuconfig umbrella for all Qualcomm QMP PHY drivers. > Setting it to built-in is required to allow any of its sub-drivers to be > built-in. Since only the UFS PHY (PHY_QCOM_QMP_UFS) needs to be > built-in for the rootfs use case, the PCIe and USB sub-drivers > (PHY_QCOM_QMP_PCIE, PHY_QCOM_QMP_PCIE_8996, PHY_QCOM_QMP_USB) are > explicitly set to module to avoid unnecessarily inflating the kernel > image. The combo PHY sub-driver (PHY_QCOM_QMP_COMBO) is naturally > capped at module by its dependencies on TYPEC=m and DRM=m. > > Signed-off-by: Shawn Guo > --- > arch/arm64/configs/defconfig | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig > index dd1ac01ee29b..f6ac2d29cbdf 100644 > --- a/arch/arm64/configs/defconfig > +++ b/arch/arm64/configs/defconfig > @@ -1316,7 +1316,7 @@ CONFIG_SCSI_UFSHCD=y > CONFIG_SCSI_UFS_BSG=y > CONFIG_SCSI_UFSHCD_PLATFORM=y > CONFIG_SCSI_UFS_CDNS_PLATFORM=m > -CONFIG_SCSI_UFS_QCOM=m > +CONFIG_SCSI_UFS_QCOM=y No, I reiterated this many times on the list, so once more: no. This is fine as module. Best regards, Krzysztof