From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 091912185B1; Wed, 19 Mar 2025 14:38:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742395084; cv=none; b=mChGrjfbwApvBAs9XnalLhUmW2oiu+9Wu4hKyZJRiKDb/XAeiHgpAfdTtrVJXdtrxKT+04YMdlKZ3JtlMqPnZYIgBIqjNaHDYVMXODplL/eY7BJbMsn5bly1KTGPAbNrEajW70+M/uYYli5Mf86BxdtxsZbIpKPZ6BL4WmErc2E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742395084; c=relaxed/simple; bh=PABaw+6uxWYtIgGhlU8RT5U0y6BIamNmBIPqUNloNCk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=TR2mRfQbqeeq7wu7xeMVvhjfOsiwFejGedM76a0dQPzhiifsNVh7crJQ5OO5aoUJBqRIctyNKN4/jnBvArG12vrfuPkpER0SFGna/U9TlSZrpO4ecrvAKlsWzmX2fMl6gxHekylPlEaMAAxzm7aMxA7hsjRxNGTSh35dJahnt7Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=W/Bs8Nya; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="W/Bs8Nya" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D005AC4CEE4; Wed, 19 Mar 2025 14:38:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1742395083; bh=PABaw+6uxWYtIgGhlU8RT5U0y6BIamNmBIPqUNloNCk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W/Bs8NyaXTUSH06KZlTtUOkXlZdu2RvM41vnZisiYCuUIMieEV3WlWzusQG28bvBl Ir4rbDgyHZldaGQgvvpW9knMP5eifm4/y/X86qztXtM/rmPloBieViLayT56SGGAlA duWAAwM/8dEj/Le9AMCl480m/WOdA7PJE+OBXnsQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sybil Isabel Dorsett , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Sasha Levin Subject: [PATCH 6.12 088/231] platform/x86: thinkpad_acpi: Fix invalid fan speed on ThinkPad X120e Date: Wed, 19 Mar 2025 07:29:41 -0700 Message-ID: <20250319143029.016478104@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250319143026.865956961@linuxfoundation.org> References: <20250319143026.865956961@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sybil Isabel Dorsett [ Upstream commit 1046cac109225eda0973b898e053aeb3d6c10e1d ] On ThinkPad X120e, fan speed is reported in ticks per revolution rather than RPM. Recalculate the fan speed value reported for ThinkPad X120e to RPM based on a 22.5 kHz clock. Based on the information on https://www.thinkwiki.org/wiki/How_to_control_fan_speed, the same problem is highly likely to be relevant to at least Edge11, but Edge11 is not addressed in this patch. Signed-off-by: Sybil Isabel Dorsett Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20250203163255.5525-1-sybdorsett@proton.me Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin --- drivers/platform/x86/thinkpad_acpi.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 84dcd7da7319e..21fecdf35cd0d 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -7883,6 +7883,7 @@ static struct ibm_struct volume_driver_data = { #define FAN_NS_CTRL_STATUS BIT(2) /* Bit which determines control is enabled or not */ #define FAN_NS_CTRL BIT(4) /* Bit which determines control is by host or EC */ +#define FAN_CLOCK_TPM (22500*60) /* Ticks per minute for a 22.5 kHz clock */ enum { /* Fan control constants */ fan_status_offset = 0x2f, /* EC register 0x2f */ @@ -7938,6 +7939,7 @@ static int fan_watchdog_maxinterval; static bool fan_with_ns_addr; static bool ecfw_with_fan_dec_rpm; +static bool fan_speed_in_tpr; static struct mutex fan_mutex; @@ -8140,8 +8142,11 @@ static int fan_get_speed(unsigned int *speed) !acpi_ec_read(fan_rpm_offset + 1, &hi))) return -EIO; - if (likely(speed)) + if (likely(speed)) { *speed = (hi << 8) | lo; + if (fan_speed_in_tpr && *speed != 0) + *speed = FAN_CLOCK_TPM / *speed; + } break; case TPACPI_FAN_RD_TPEC_NS: if (!acpi_ec_read(fan_rpm_status_ns, &lo)) @@ -8174,8 +8179,11 @@ static int fan2_get_speed(unsigned int *speed) if (rc) return -EIO; - if (likely(speed)) + if (likely(speed)) { *speed = (hi << 8) | lo; + if (fan_speed_in_tpr && *speed != 0) + *speed = FAN_CLOCK_TPM / *speed; + } break; case TPACPI_FAN_RD_TPEC_NS: @@ -8786,6 +8794,7 @@ static const struct attribute_group fan_driver_attr_group = { #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 */ +#define TPACPI_FAN_TPR 0x0040 /* Fan speed is in Ticks Per Revolution */ static const struct tpacpi_quirk fan_quirk_table[] __initconst = { TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), @@ -8815,6 +8824,7 @@ static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 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 */ + TPACPI_Q_LNV('8', 'F', TPACPI_FAN_TPR), /* ThinkPad x120e */ }; static int __init fan_init(struct ibm_init_struct *iibm) @@ -8885,6 +8895,8 @@ static int __init fan_init(struct ibm_init_struct *iibm) if (quirks & TPACPI_FAN_Q1) fan_quirk1_setup(); + if (quirks & TPACPI_FAN_TPR) + fan_speed_in_tpr = true; /* Try and probe the 2nd fan */ tp_features.second_fan = 1; /* needed for get_speed to work */ res = fan2_get_speed(&speed); -- 2.39.5