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Mon, 12 May 2025 04:15:58 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 54C4FvPr008184 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 May 2025 04:15:57 GMT Received: from [10.216.41.215] (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Sun, 11 May 2025 21:15:52 -0700 Message-ID: <8ebe4439-eab8-456a-ac91-b53956eab633@quicinc.com> Date: Mon, 12 May 2025 09:45:49 +0530 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 V2 1/3] scsi: ufs: dt-bindings: Document UFS Disable LPM property From: Nitin Rawat To: Krzysztof Kozlowski , , , , , , , , , , , CC: , , , References: <20250506163705.31518-1-quic_nitirawa@quicinc.com> <20250506163705.31518-2-quic_nitirawa@quicinc.com> <667e43a7-a33c-491b-83ca-fe06a2a5d9c3@kernel.org> <9974cf1d-6929-4c7f-8472-fd19c7a40b12@quicinc.com> Content-Language: en-US In-Reply-To: <9974cf1d-6929-4c7f-8472-fd19c7a40b12@quicinc.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTEyMDA0MSBTYWx0ZWRfX5lpTx1qfLZEX 9efWac04HZiyJAoUuKIOzYP384IVU5nmZuSzPcBH2pwkraycLo88cFGaxE4ky6NR3fZjaSY3jQw Efm5qcrftdQRQCnNAFarbykz0VcSDo95YDBoasfbQYt3+8Wof5UksEMQ+i66rOxy9/lU5YUDPsS htF8jJkvxPKiY1i5ZAf2jTpFPryfPei1J9/04nymmaY4intaEKLvtltsooZV9FCt/1aQb5aV5bW rMoRSq+cdrwgNKDgXUJ8wTPGzuDpWhxdgRrkwF90CS1/nEmg4RPDVy8EROXdTpHGikWPVEJEyTW TWpUDess3zEg6YeM5vxzAi3rZNl6fOsGkNDXWxqoo52uXZ88WVsbwtgqJeh03eXGf3dNhHSRFaH lkegvitShDfra9dVayq+4E5p6j2QDUM6oLChtlvC6x6mi/XUCbWWvmPvKsKD4s69qWsnv+1A X-Proofpoint-GUID: 12Wti5JdCVsqytwACHxoaLvWRHLh0rZ1 X-Proofpoint-ORIG-GUID: 12Wti5JdCVsqytwACHxoaLvWRHLh0rZ1 X-Authority-Analysis: v=2.4 cv=c5irQQ9l c=1 sm=1 tr=0 ts=682175fe cx=c_pps a=ouPCqIW2jiPt+lZRy3xVPw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=GEpy-HfZoHoA:10 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=paxrxDOAfeD8ejVehjsA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-12_01,2025-05-09_01,2025-02-21_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 phishscore=0 adultscore=0 malwarescore=0 impostorscore=0 mlxlogscore=999 mlxscore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2504070000 definitions=main-2505120041 On 5/7/2025 8:34 PM, Nitin Rawat wrote: > > > On 5/6/2025 11:46 PM, Krzysztof Kozlowski wrote: >> On 06/05/2025 18:37, Nitin Rawat wrote: >>> Disable UFS low power mode on emulation FPGA platforms or other >>> platforms >> >> Why wouldn't you like to test LPM also on FPGA designs? I do not see >> here correlation. > > Hi Krzysztof, > > Since the FPGA platform doesn't support UFS Low Power Modes (such as the > AutoHibern8 feature specified in the UFS specification), I have included > this information in the hardware description (i.e dts). Hi Krzysztof, Could you please share your thoughts on my above comment? If you still see concerns, I may need to consider other options like modparam. Regards, Nitin > > Thanks, > Nitin > >> >>> where it is either unsupported or power efficiency is not a critical >>> requirement. >> >> That's a policy, not hardware, thus not suitable for DT. >> >> Best regards, >> Krzysztof > >