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 DFE8814F70; Fri, 1 Aug 2025 09:12:47 +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=1754039568; cv=none; b=L/y5tvuj4dENgltIUX1oF1FFYs6NLKdUU28/gcECx8tpWoND8Ossmm1VTPcz9u9cGsrzzDBfZwN8I7m1C67vPtx5dUuvq6IeHteJguNlgT9aFEE+iz7zWn6tJhPmt9oYxrFbuHsq2tJ6rfS+PlHGVwMa3HEInolPfyvzrLot1jg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754039568; c=relaxed/simple; bh=/0aIoMWpMvoKgmbhWwt6QEfVxNIXHXS3+4r5hcmLZpo=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=YOBBf0pb7BeDaOMUMVNIbCOQyX1xVW4YI/AgAyR+ylDtDirb7XFhfn3MqKhORKhcdvDQcETuyWeb7LYCBTFfuW9+moVp7MV/iKknGmYJARh4KIfrFXCRJQEJ4Y7Q2QENjme0L/UX/uq1RtQYZ0pMrZxmy1O3ra2NvOjYec0HkaM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=a+l59xB7; 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="a+l59xB7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0678FC4CEE7; Fri, 1 Aug 2025 09:12:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754039567; bh=/0aIoMWpMvoKgmbhWwt6QEfVxNIXHXS3+4r5hcmLZpo=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=a+l59xB7qoAyviFi3i7LZLuyTEAXVbrhAkRc7BF7nst+vregdi/ujA/4dmeORT9Di QW495UpQlbytopSioQ5wvuzfL9S3mwiqBP0pOHGLqYSmSfv8b9erDck1OnkLRr/Bj2 g2roHwrOZ9kO/Krgbu53rqjuE4AM+MxRvVNfA3DQ+0VPvtTQqR3UYY5New8ZskPaCm fYvuIc8sR3SxpuC36CYrrLdcIixWM4fyuhDKdlTt03TXsscXSescdxzMGjwZ3bDPc9 PUV3fA+xQb8AP02mae2d2at7Y7JH6QcH3f8F6WGi8Zu/u8nAVPy+r5zilrhi49JUM1 Iqv5Qs4rywmeg== Message-ID: <1701ec08-21bc-45b8-90bc-1cd64401abd8@kernel.org> Date: Fri, 1 Aug 2025 11:12:42 +0200 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/3] arm64: dts: qcom: sa8155: Add gear and rate limit properties to UFS To: Ram Kumar Dwivedi , Manivannan Sadhasivam Cc: alim.akhtar@samsung.com, avri.altman@wdc.com, bvanassche@acm.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andersson@kernel.org, konradybcio@kernel.org, James.Bottomley@hansenpartnership.com, martin.petersen@oracle.com, agross@kernel.org, linux-arm-msm@vger.kernel.org, linux-scsi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250722161103.3938-1-quic_rdwivedi@quicinc.com> <20250722161103.3938-3-quic_rdwivedi@quicinc.com> <2a3c8867-7745-4f0a-8618-0f0f1bea1d14@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 01/08/2025 11:10, Ram Kumar Dwivedi wrote: > > > On 01-Aug-25 1:58 PM, Manivannan Sadhasivam wrote: >> On Thu, Jul 24, 2025 at 09:48:53AM GMT, Krzysztof Kozlowski wrote: >>> On 22/07/2025 18:11, Ram Kumar Dwivedi wrote: >>>> Add optional limit-hs-gear and limit-rate properties to the UFS node to >>>> support automotive use cases that require limiting the maximum Tx/Rx HS >>>> gear and rate due to hardware constraints. >>> >>> What hardware constraints? This needs to be clearly documented. >>> >> >> Ram, both Krzysztof and I asked this question, but you never bothered to reply, >> but keep on responding to other comments. This won't help you to get this series >> merged in any form. >> >> Please address *all* review comments before posting next iteration. > > Hi Mani, > > Apologies for the delay in responding. > I had planned to explain the hardware constraints in the next patchset’s commit message, which is why I didn’t reply earlier. > > To clarify: the limitations are due to customer board designs, not our SoC. Some boards can't support higher gear operation, hence the need for optional limit-hs-gear and limit-rate properties. > That's vague and does not justify the property. You need to document instead hardware capabilities or characteristic. Or explain why they cannot. With such form I will object to your next patch. Best regards, Krzysztof