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 5E53C1FECB8; Tue, 18 Feb 2025 20:26:53 +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=1739910413; cv=none; b=edhXYu0vfUpB0e44uFVZuZkpFTXXV0fQ1ohfNAVQdZjypk8e43IDTeTgAwDFrb8t+VKShGWL/6lgS8YNbMd2V3G+alYwkLbpuMLFR37nNVHKx00I4rdf90r2CEXLXCGz9D06vl0qV4KZcJcZCUVXmar+9/v6fUMljrk9R8FHGGs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739910413; c=relaxed/simple; bh=W40fmn0GF/iCbSU8PYbR+qEbaLnLwXnRe7e9jdruoeM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=oJcf5pKZcEzIeoEeBETT2IgnsbCM+QHAltOA0yqNO23VNdnV+/A1ne0//JvVKMcHi1UOGP/5pBOGWqHUDDc9bt6hiLWpUbGWyaPCgGzuGnFj8nXxD7xYwFu6GpGnRIMX41IBKnh80E1hlQkpHkL1pmRecFiX7o3jkawl0IsGiE4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oJGRf/Yy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="oJGRf/Yy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48E4AC4CEE8; Tue, 18 Feb 2025 20:26:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739910413; bh=W40fmn0GF/iCbSU8PYbR+qEbaLnLwXnRe7e9jdruoeM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oJGRf/YyJMgRT8qpEWa0rpeSCanStzLawbW5v3MC8qxqUPbafdrQ0sxW6AAkDaapa O/sFIgfrxTbm5tWL9zkI48WysRiNlpwcwGcRJVqaXB8yr+HP68u5AbcExvTtBcf69o +vUj5Qmwp7TivhKQaMd1bFAdmbrjKev8MRWhEpf8diHw9jrZBvWrnS6rtcfcOpADau olXbo455XMragsRhW+qYggAk6GLD6OCR+02xO4ydItxUvlzKp4rHsicGWgapu2zokB A3NKH/u88nXjHrM463XjITrjFwMyXOLJiN35IXk3ob60tWtr0B+5dEC4aJepl8QM8f 3va6avURKAm5A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sybil Isabel Dorsett , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Sasha Levin , hmh@hmh.eng.br, hdegoede@redhat.com, ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org Subject: [PATCH AUTOSEL 6.12 15/31] platform/x86: thinkpad_acpi: Fix invalid fan speed on ThinkPad X120e Date: Tue, 18 Feb 2025 15:26:01 -0500 Message-Id: <20250218202619.3592630-15-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250218202619.3592630-1-sashal@kernel.org> References: <20250218202619.3592630-1-sashal@kernel.org> 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=UTF-8 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.15 Content-Transfer-Encoding: 8bit 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 2cfb2ac3f465a..05d77f87e235e 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