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Wed, 16 Sep 2026 12:42:06 -0700 (PDT) X-Received: by 2002:a17:90a:d646:b0:39e:3554:4d0c with SMTP id 98e67ed59e1d1-39e35545ae5mr3665448a91.2.1789587726046; Wed, 16 Sep 2026 12:42:06 -0700 (PDT) Received: from hu-arakshit-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-33bf5af6593sm9174704eec.25.2026.09.16.12.41.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Sep 2026 12:42:05 -0700 (PDT) Date: Thu, 17 Sep 2026 01:11:57 +0530 From: Abhinaba Rakshit To: Ulf Hansson Cc: Bjorn Andersson , Konrad Dybcio , Manivannan Sadhasivam , "James E.J. Bottomley" , "Martin K. Petersen" , Adrian Hunter , Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neeraj Soni , Harshal Dev , Kuldeep Singh , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, Konrad Dybcio Subject: Re: [PATCH v12 3/6] mmc: sdhci-msm: Set ICE clk to TURBO at sdhci ICE init Message-ID: References: <20260824-enable-ice-clock-scaling-v12-0-09271f583dc6@oss.qualcomm.com> <20260824-enable-ice-clock-scaling-v12-3-09271f583dc6@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE2MDI3MiBTYWx0ZWRfX1nKV2fA8+R69 bN3ruredYk57OvKhEUgcx9+PXPzBPoTowryhHJyIZR2z3Iq4ca6RkJ6+gCAHySrLvc/q3uZ8B/I r5AKQmklw1asAbXPBT9x1OUhTlnZg9Hw8EzsQdgjyEa17tVCoM8J2eG8nH8ue27+lGtvD9ZaykK 7hsf3L39tU18YZWdItxzXJ0BCXhEUSW9J8qRX3C/uT8HmYc2KanxqbpJd6Sd6v9H3VxYY1UHH6c x7ct11t2ZA+bvUesTbYNfH1PQXJzrOnDcZpafUqTAWbr038CYBFlPp1JWW5AEE9am98ytdB2TxT bWwlXkAzJcTU36vAGOvoU8SOi4bNPYSFemcxMa9TO6/7QjF965pG/jNUT7hMt+7mfUuYMuP+++k fB869BwVEAUEYaDRQ6vDl+YaerU9GBGGGcMXKvzYM/JD71Tyf2r9O6TdT8BI3aCs1QpWDiRYmDl TYPuK7MnmuwnwI5siNQ== X-Proofpoint-GUID: aykVrjm1ynNZP-l4_4-5VYMTmPBNRpZd X-Authority-Analysis: v=2.4 cv=EoJHPicA c=1 sm=1 tr=0 ts=6aaaf10f cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=QyXUC8HyAAAA:8 a=M7-gVhU5_WYnB0XQLAAA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-ORIG-GUID: aykVrjm1ynNZP-l4_4-5VYMTmPBNRpZd X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE2MDI3MiBTYWx0ZWRfX2DRd2clm5ySt z0sOS+kEPUEgk5IuqVk7Mtc4dh5R3FywNgNBW8R0acECVA00GeTmcsNVG68xsnA0p/lJNCGIMts /O36AaUEKmJrbZH7LZ1OHVvJ5j98TK0= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-16_03,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 malwarescore=0 suspectscore=0 spamscore=0 adultscore=0 impostorscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609160272 On Thu, Sep 10, 2026 at 12:17:46PM +0200, Ulf Hansson wrote: > On Sun, Aug 23, 2026 at 9:48 PM Abhinaba Rakshit > wrote: > > > > MMC controller lacks a clock scaling mechanism, unlike the UFS > > controller. By default, the MMC controller is set to TURBO mode > > during probe, but the ICE clock remains at XO frequency, > > leading to read/write performance degradation on eMMC. > > > > To address this, set the ICE clock to TURBO during sdhci_msm_ice_init > > to align it with the controller clock. This ensures consistent > > performance and avoids mismatches between the controller > > and ICE clock frequencies. > > > > For platforms where ICE is represented as a separate device, > > use the OPP framework to vote for TURBO mode, maintaining > > proper voltage and power domain constraints. > > > > Reviewed-by: Konrad Dybcio > > Acked-by: Adrian Hunter > > Reviewed-by: Adrian Hunter > > Signed-off-by: Abhinaba Rakshit > > This looks good to me! > > Although I have a question - should we never drop the vote? Like at > suspend and runtime suspend, at least? This point is already discussed with Konrad on earlier patchseries: https://lore.kernel.org/all/d1232243-2f23-423b-84ac-4463eac79f9a@oss.qualcomm.com/ Since, as the device goes to suspend and power will be turned down, PM runtime will drop the votes and hence having it in suspend resume is redundent. Abhinaba Rakshit