linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Corentin Chary <corentin.chary@gmail.com>,
	Darren Hart <dvhart@infradead.org>,
	Andy Shevchenko <andy@infradead.org>,
	Daniel Drake <drake@endlessm.com>,
	acpi4asus-user@lists.sourceforge.net,
	platform-driver-x86@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 08/11] platform/x86: asus-wmi: Enhance detection of thermal data
Date: Thu, 11 Apr 2019 07:45:58 +0200	[thread overview]
Message-ID: <ee220162-27d2-87ad-0f0f-bedd2cdc7192@gmail.com> (raw)
In-Reply-To: <91702752-5e6d-43c8-5b41-a52a34b10d26@gmail.com>

The obviously wrong value 1 for temperature device ID in this driver is
returned by at least some devices, including TUF Gaming series laptops,
instead of 0 as expected previously. Observable effect is that a
temp1_input in hwmon reads temperature near absolute zero.

* Consider 0.1 K as erroneous value in addition to 0 K.
* Refactor detection of thermal input availability to a separate function.

Signed-off-by: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com>
---
 drivers/platform/x86/asus-wmi.c | 45 ++++++++++++++++++++++++++++-----
 1 file changed, 38 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index a98df005d6cb..de0a8f61d4a1 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -176,6 +176,7 @@ struct asus_wmi {
 	struct asus_rfkill gps;
 	struct asus_rfkill uwb;
 
+	bool asus_hwmon_thermal_available;
 	bool asus_hwmon_fan_manual_mode;
 	int asus_hwmon_num_fans;
 	int asus_hwmon_pwm;
@@ -1373,6 +1374,32 @@ static struct attribute *hwmon_attributes[] = {
 	NULL
 };
 
+static int asus_hwmon_check_thermal_available(struct asus_wmi *asus)
+{
+	u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
+	int err;
+
+	asus->asus_hwmon_thermal_available = false;
+	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
+
+	if (err < 0) {
+		if (err == -ENODEV)
+			return 0;
+
+		return err;
+	}
+
+	/*
+	 * If the temperature value in deci-Kelvin is near the absolute
+	 * zero temperature, something is clearly wrong.
+	 */
+	if (!value || value == 1)
+		return 0;
+
+	asus->asus_hwmon_thermal_available = true;
+	return 0;
+}
+
 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
 					  struct attribute *attr, int idx)
 {
@@ -1386,8 +1413,6 @@ static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
 
 	if (attr == &dev_attr_pwm1.attr)
 		dev_id = ASUS_WMI_DEVID_FAN_CTRL;
-	else if (attr == &dev_attr_temp1_input.attr)
-		dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
 
 	if (attr == &dev_attr_fan1_input.attr
 	    || attr == &dev_attr_fan1_label.attr
@@ -1412,15 +1437,13 @@ static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
 		 * - reverved bits are non-zero
 		 * - sfun and presence bit are not set
 		 */
-		if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
+		if (value == ASUS_WMI_UNSUPPORTED_METHOD || (value & 0xFFF80000)
 		    || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
 			ok = false;
 		else
 			ok = fan_attr <= asus->asus_hwmon_num_fans;
-	} else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
-		/* If value is zero, something is clearly wrong */
-		if (!value)
-			ok = false;
+	} else if (attr == &dev_attr_temp1_input.attr) {
+		ok = asus->asus_hwmon_thermal_available;
 	} else if (fan_attr <= asus->asus_hwmon_num_fans && fan_attr != -1) {
 		ok = true;
 	} else {
@@ -1476,6 +1499,14 @@ static int asus_wmi_fan_init(struct asus_wmi *asus)
 	}
 
 	pr_info("Number of fans: %d\n", asus->asus_hwmon_num_fans);
+
+	status = asus_hwmon_check_thermal_available(asus);
+	if (status) {
+		pr_warn("Could not check if thermal available: %d\n", status);
+		return -ENXIO;
+	}
+
+	pr_info("Thermal available: %d\n", asus->asus_hwmon_thermal_available);
 	return 0;
 }
 
-- 
2.17.1


  reply	other threads:[~2019-04-11  5:46 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-10 20:11 [PATCH 00/11] asus-wmi: Support of ASUS TUF Gaming series laptops Yurii Pavlovskyi
2019-04-10 20:20 ` [PATCH 01/11] platform/x86: asus-wmi: Fix hwmon device cleanup Yurii Pavlovskyi
2019-04-11  8:21   ` Daniel Drake
2019-04-12 17:49     ` Yurii Pavlovskyi
2019-04-10 20:26 ` [PATCH 02/11] platform/x86: asus-wmi: Fix preserving keyboard, backlight intensity on load Yurii Pavlovskyi
2019-04-10 20:27 ` [PATCH 03/11] platform/x86: asus-wmi: Increase input buffer size of WMI methods Yurii Pavlovskyi
2019-04-10 20:28 ` [PATCH 04/11] platform/x86: asus-wmi: Add quirk to force DSTS WMI method detection Yurii Pavlovskyi
2019-04-11  5:42   ` [PATCH v2 " Yurii Pavlovskyi
2019-04-11 10:55   ` [PATCH " Daniel Drake
2019-04-12 20:04     ` Yurii Pavlovskyi
2019-04-10 20:29 ` [PATCH 05/11] platform/x86: asus-wmi: Support queued WMI event codes Yurii Pavlovskyi
2019-04-11  5:44   ` [PATCH v2 " Yurii Pavlovskyi
2019-04-12  7:48     ` Daniel Drake
2019-04-12 20:32       ` Yurii Pavlovskyi
2019-04-10 20:30 ` [PATCH 06/11] platform/x86: asus-nb-wmi: Add microphone mute key code Yurii Pavlovskyi
2019-04-11  5:44   ` [PATCH v2 " Yurii Pavlovskyi
2019-04-10 20:31 ` [PATCH 07/11] platform/x86: asus-wmi: Organize code into sections Yurii Pavlovskyi
2019-04-11  5:45   ` [PATCH v2 " Yurii Pavlovskyi
2019-04-10 20:32 ` [PATCH 08/11] platform/x86: asus-wmi: Enhance detection of thermal data Yurii Pavlovskyi
2019-04-11  5:45   ` Yurii Pavlovskyi [this message]
2019-04-10 20:33 ` [PATCH 09/11] platform/x86: asus-wmi: Control RGB keyboard backlight Yurii Pavlovskyi
2019-04-11  5:46   ` [PATCH v2 " Yurii Pavlovskyi
2019-04-10 20:34 ` [PATCH 10/11] platform/x86: asus-wmi: Switch fan boost mode Yurii Pavlovskyi
2019-04-11  5:47   ` [PATCH v2 " Yurii Pavlovskyi
2019-04-12  8:03     ` Daniel Drake
2019-04-12 20:50       ` Yurii Pavlovskyi
2019-04-10 20:36 ` [PATCH 11/11] platform/x86: asus-wmi: Do not disable keyboard backlight on unload Yurii Pavlovskyi
2019-04-11  5:48   ` [PATCH v2 " Yurii Pavlovskyi
2019-04-11  5:38 ` [PATCH 00/11] asus-wmi: Support of ASUS TUF Gaming series laptops Yurii Pavlovskyi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=ee220162-27d2-87ad-0f0f-bedd2cdc7192@gmail.com \
    --to=yurii.pavlovskyi@gmail.com \
    --cc=acpi4asus-user@lists.sourceforge.net \
    --cc=andy@infradead.org \
    --cc=corentin.chary@gmail.com \
    --cc=drake@endlessm.com \
    --cc=dvhart@infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=platform-driver-x86@vger.kernel.org \
    --subject='Re: [PATCH v2 08/11] platform/x86: asus-wmi: Enhance detection of thermal data' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).