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Mon, 22 Jun 2026 00:55:04 -0700 (PDT) Received: from hu-arakshit-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-37d15de53ffsm9489656a91.12.2026.06.22.00.54.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jun 2026 00:55:03 -0700 (PDT) Date: Mon, 22 Jun 2026 13:24:56 +0530 From: Abhinaba Rakshit To: Konrad Dybcio 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 Subject: Re: [PATCH v11 3/6] mmc: sdhci-msm: Set ICE clk to TURBO at sdhci ICE init Message-ID: References: <20260609-enable-ice-clock-scaling-v11-0-1cebc8b3275b@oss.qualcomm.com> <20260609-enable-ice-clock-scaling-v11-3-1cebc8b3275b@oss.qualcomm.com> <06999033-1c2f-4203-bdcc-d8e94ed281b7@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=us-ascii Content-Disposition: inline In-Reply-To: <06999033-1c2f-4203-bdcc-d8e94ed281b7@oss.qualcomm.com> X-Proofpoint-ORIG-GUID: Vf9PAscAxF0JizBvoYLYGu9SDUKhivhW X-Proofpoint-Spam-Info: AW1haW4tMjYwNjIyMDA3NiBTYWx0ZWRfXz7hjOBwaNQaN u6SfAsR6sePLI5dbJqNs8JdLayi+b04H8a1uoHFuYmz/po/ZtlTASbhkZTu056jHCMujINYxe50 Rwa8sMpob5iUdtZNJthyRGTgw9M8JyA= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjIyMDA3NiBTYWx0ZWRfXxa18gtc3I/Nb 0taMc8B9Q2gjsceyY00o4nQ6lDtHHBiITI3v0EavOae3MeQm4yAV4tIyriThC5zKrZL3KFsou9z hlAPQDV5W0eXaAU+LPPKIgT3KUMx7dZb73zGqLF2XhHlAZQJBaSeKz/OyQ2/z3sRFl6p9VQ0uWG NBdEuXSicBPk1DMTRSDWjl2PitVnSthII+OpwE9MONm3P0vAI16zwRwcq+n/21z8A9kHH1ZOx8b hDi1WTn+Bc4VBKP8BLp9wHAKeu3fYMyEvMxMhaZSSAw0djhOoNlCQs3iH9QiPrOsV0iP0YsVsn0 CaEUQvsbxHporfevb1k5Xhe2rMc495bJaF4lzYhkApbooiJpgvWo9bF5+O/6gFvJyrglIdoQyih I//usg5lNHpPlAFn5smDI5aQJZdrlbCKR4+WS394I3WgkX9bhCWNAJAYt+hdj2o0ovJMNODxxBq qvh4rInrGv4Q7p/jXRA== X-Proofpoint-GUID: Vf9PAscAxF0JizBvoYLYGu9SDUKhivhW X-Authority-Analysis: v=2.4 cv=TO51jVla c=1 sm=1 tr=0 ts=6a38ea59 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=kj9zAlcOel0A:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=QyXUC8HyAAAA:8 a=ciROkYvXyXDSqN8Q_VUA:9 a=CjuIK1q_8ugA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-22_01,2026-06-18_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 malwarescore=0 clxscore=1015 phishscore=0 spamscore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606220076 On Thu, Jun 18, 2026 at 02:59:02PM +0200, Konrad Dybcio wrote: > On 6/8/26 11:47 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 > > --- > > drivers/mmc/host/sdhci-msm.c | 24 ++++++++++++++++++++++++ > > 1 file changed, 24 insertions(+) > > > > diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c > > index 0882ce74e0c9bdddd98341a67b97bcef74078e0c..b655bcb5b90c0677bbe3dc6140de488038fe5ee8 100644 > > --- a/drivers/mmc/host/sdhci-msm.c > > +++ b/drivers/mmc/host/sdhci-msm.c > > @@ -1901,6 +1901,8 @@ static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock) > > #ifdef CONFIG_MMC_CRYPTO > > > > static const struct blk_crypto_ll_ops sdhci_msm_crypto_ops; /* forward decl */ > > +static int sdhci_msm_ice_scale_clk(struct sdhci_msm_host *msm_host, unsigned long target_freq, > > + bool round_ceil); /* forward decl */ > > Can the definition simply be moved upwards? Yes, we can do that. I used a forward declaration because it appeared that sdhci_msm_ice_init() was intentionally kept as the first ICE-related function in the file. If that is not a requirement, I'm fine to move sdhci_msm_ice_scale_clk() above and remove the forward declaration. Abhinaba Rakshit