| From: |
| Ziqi Chen <quic_ziqichen-AT-quicinc.com> |
| To: |
| quic_cang-AT-quicinc.com, bvanassche-AT-acm.org, mani-AT-kernel.org, beanhuo-AT-micron.com, avri.altman-AT-wdc.com, junwoo80.lee-AT-samsung.com, martin.petersen-AT-oracle.com, quic_ziqichen-AT-quicinc.com, quic_nguyenb-AT-quicinc.com, quic_nitirawa-AT-quicinc.com, quic_rampraka-AT-quicinc.com |
| Subject: |
| [PATCH 0/8] Support Multi-frequency scale for UFS |
| Date: |
| Thu, 16 Jan 2025 17:11:41 +0800 |
| Message-ID: |
| <20250116091150.1167739-1-quic_ziqichen@quicinc.com> |
| Cc: |
| linux-scsi-AT-vger.kernel.org, Matthias Brugger <matthias.bgg-AT-gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno-AT-collabora.com>, linux-kernel-AT-vger.kernel.org (open list:ARM/Mediatek SoC support:Keyword:mediatek), linux-arm-kernel-AT-lists.infradead.org (moderated list:ARM/Mediatek SoC support:Keyword:mediatek), linux-mediatek-AT-lists.infradead.org (moderated list:ARM/Mediatek SoC support:Keyword:mediatek) |
| Archive-link: |
| Article |
With OPP V2 enabled, devfreq can scale clocks amongst multiple frequency
plans. However, the gear speed is only toggled between min and max during
clock scaling. Enable multi-level gear scaling by mapping clock frequencies
to gear speeds, so that when devfreq scales clock frequencies we can put
the UFS link at the appropraite gear speeds accordingly.
This series has been tested on below platforms -
SM8650 + UFS3.1
SM8750 + UFS4.0
Can Guo (6):
scsi: ufs: core: Pass target_freq to clk_scale_notify() vops
scsi: ufs: qcom: Pass target_freq to clk scale pre and post change
scsi: ufs: core: Add a vops to map clock frequency to gear speed
scsi: ufs: qcom: Implement the freq_to_gear_speed() vops
scsi: ufs: core: Enable multi-level gear scaling
scsi: ufs: core: Toggle Write Booster during clock scaling base on
gear speed
Ziqi Chen (2):
scsi: ufs: core: Check if scaling up is required when disable clkscale
ARM: dts: msm: Use Operation Points V2 for UFS on SM8650
arch/arm64/boot/dts/qcom/sm8650.dtsi | 51 ++++++++++++++++----
drivers/ufs/core/ufshcd-priv.h | 17 +++++--
drivers/ufs/core/ufshcd.c | 71 +++++++++++++++++++++-------
drivers/ufs/host/ufs-mediatek.c | 1 +
drivers/ufs/host/ufs-qcom.c | 60 ++++++++++++++++++-----
include/ufs/ufshcd.h | 8 +++-
6 files changed, 166 insertions(+), 42 deletions(-)
--
2.34.1
