This is a note to let you know that I've just added the patch titled
scsi: ufs: qcom: Provide default cycles_in_1us value
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-ufs-qcom-provide-default-cycles_in_1us-value.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 81e2c1a0f8d3f62f4c9e80b20270aa3481c40524 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Date: Sun, 18 Feb 2024 15:56:34 +0200
Subject: scsi: ufs: qcom: Provide default cycles_in_1us value
From: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
commit 81e2c1a0f8d3f62f4c9e80b20270aa3481c40524 upstream.
The MSM8996 DT doesn't provide frequency limits for the core_clk_unipro
clock, which results in miscalculation of the cycles_in_1us value. Provide
the backwards-compatible default to support existing MSM8996 DT files.
Fixes: b4e13e1ae95e ("scsi: ufs: qcom: Add multiple frequency support for MAX_CORE_CLK_1US_CYCLES")
Cc: Nitin Rawat <quic_nitirawa@xxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 6.7.x
Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240218-msm8996-fix-ufs-v3-1-40aab49899a3@xxxxxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/ufs/host/ufs-qcom.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1196,8 +1196,10 @@ static int ufs_qcom_set_core_clk_ctrl(st
list_for_each_entry(clki, head, list) {
if (!IS_ERR_OR_NULL(clki->clk) &&
- !strcmp(clki->name, "core_clk_unipro")) {
- if (is_scale_up)
+ !strcmp(clki->name, "core_clk_unipro")) {
+ if (!clki->max_freq)
+ cycles_in_1us = 150; /* default for backwards compatibility */
+ else if (is_scale_up)
cycles_in_1us = ceil(clki->max_freq, (1000 * 1000));
else
cycles_in_1us = ceil(clk_get_rate(clki->clk), (1000 * 1000));
Patches currently in stable-queue which might be from dmitry.baryshkov@xxxxxxxxxx are
queue-6.8/scsi-ufs-qcom-provide-default-cycles_in_1us-value.patch
queue-6.8/usb-typec-ucsi-clean-up-ucsi_cable_prop-macros.patch
