Hi, On 6-Nov-24 12:55 AM, Vishnu Sankar wrote: > Fix for Thinkpad's with ECFW showing incorrect fan speed. > Some models use decimal instead of hexadecimal for the fan speed stored > in the EC registers. > for eg: the rpm register will have 0x4200 instead of 0x1068. > Here the actual RPM is "4200" in decimal. > > A quirk added to handle this. Thank you for your patch/series, I've applied this patch (series) to my review-hans branch: https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans > Signed-off-by: Vishnu Sankar <vishnuocv@xxxxxxxxx> > Signed-off-by: Vishnu Sankar <vsankar@xxxxxxxxxx> Note I have dropped this second duplicate Signed-off-by, I have kept the first one since that matches the From: from this email / the git commit author field. I will include this patch in my next fixes pull-req to Linus for the current kernel development cycle. Regards, Hans > Suggested-by: Mark Pearson <mpearson-lenovo@xxxxxxxxx> > --- > drivers/platform/x86/thinkpad_acpi.c | 28 +++++++++++++++++++++++++--- > 1 file changed, 25 insertions(+), 3 deletions(-) > > diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c > index 4c1b0553f872..6371a9f765c1 100644 > --- a/drivers/platform/x86/thinkpad_acpi.c > +++ b/drivers/platform/x86/thinkpad_acpi.c > @@ -7936,6 +7936,7 @@ static u8 fan_control_resume_level; > static int fan_watchdog_maxinterval; > > static bool fan_with_ns_addr; > +static bool ecfw_with_fan_dec_rpm; > > static struct mutex fan_mutex; > > @@ -8682,7 +8683,11 @@ static ssize_t fan_fan1_input_show(struct device *dev, > if (res < 0) > return res; > > - return sysfs_emit(buf, "%u\n", speed); > + /* Check for fan speeds displayed in hexadecimal */ > + if (!ecfw_with_fan_dec_rpm) > + return sysfs_emit(buf, "%u\n", speed); > + else > + return sysfs_emit(buf, "%x\n", speed); > } > > static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); > @@ -8699,7 +8704,11 @@ static ssize_t fan_fan2_input_show(struct device *dev, > if (res < 0) > return res; > > - return sysfs_emit(buf, "%u\n", speed); > + /* Check for fan speeds displayed in hexadecimal */ > + if (!ecfw_with_fan_dec_rpm) > + return sysfs_emit(buf, "%u\n", speed); > + else > + return sysfs_emit(buf, "%x\n", speed); > } > > static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); > @@ -8775,6 +8784,7 @@ static const struct attribute_group fan_driver_attr_group = { > #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */ > #define TPACPI_FAN_NOFAN 0x0008 /* no fan available */ > #define TPACPI_FAN_NS 0x0010 /* For EC with non-Standard register addresses */ > +#define TPACPI_FAN_DECRPM 0x0020 /* For ECFW's with RPM in register as decimal */ > > static const struct tpacpi_quirk fan_quirk_table[] __initconst = { > TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), > @@ -8803,6 +8813,7 @@ static const struct tpacpi_quirk fan_quirk_table[] __initconst = { > TPACPI_Q_LNV3('R', '1', 'D', TPACPI_FAN_NS), /* 11e Gen5 GL-R */ > TPACPI_Q_LNV3('R', '0', 'V', TPACPI_FAN_NS), /* 11e Gen5 KL-Y */ > TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN), /* X1 Tablet (2nd gen) */ > + TPACPI_Q_LNV3('R', '0', 'Q', TPACPI_FAN_DECRPM),/* L480 */ > }; > > static int __init fan_init(struct ibm_init_struct *iibm) > @@ -8847,6 +8858,13 @@ static int __init fan_init(struct ibm_init_struct *iibm) > tp_features.fan_ctrl_status_undef = 1; > } > > + /* Check for the EC/BIOS with RPM reported in decimal*/ > + if (quirks & TPACPI_FAN_DECRPM) { > + pr_info("ECFW with fan RPM as decimal in EC register\n"); > + ecfw_with_fan_dec_rpm = 1; > + tp_features.fan_ctrl_status_undef = 1; > + } > + > if (gfan_handle) { > /* 570, 600e/x, 770e, 770x */ > fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; > @@ -9067,7 +9085,11 @@ static int fan_read(struct seq_file *m) > if (rc < 0) > return rc; > > - seq_printf(m, "speed:\t\t%d\n", speed); > + /* Check for fan speeds displayed in hexadecimal */ > + if (!ecfw_with_fan_dec_rpm) > + seq_printf(m, "speed:\t\t%d\n", speed); > + else > + seq_printf(m, "speed:\t\t%x\n", speed); > > if (fan_status_access_mode == TPACPI_FAN_RD_TPEC_NS) { > /*
