Pull bugzilla-8842 into release branch (d8dd3cbc) · Commits · e / devices / android_kernel_xiaomi_markw

Documentation/kernel-parameters.txt

+20 −0

Original line number	Diff line number	Diff line
		@@ -1822,6 +1822,26 @@ and is between 256 and 4096 characters. It is defined in the file
		thash_entries= [KNL,NET]
		Set number of hash buckets for TCP connection

		thermal.act= [HW,ACPI]
		-1: disable all active trip points in all thermal zones
		<degrees C>: override all lowest active trip points

		thermal.nocrt= [HW,ACPI]
		Set to disable actions on ACPI thermal zone
		critical and hot trip points.

		thermal.off= [HW,ACPI]
		1: disable ACPI thermal control

		thermal.psv= [HW,ACPI]
		-1: disable all passive trip points
		<degrees C>: override all passive trip points to this value

		thermal.tzp= [HW,ACPI]
		Specify global default ACPI thermal zone polling rate
		<deci-seconds>: poll all this frequency
		0: no polling (default)

		time Show timing data prefixed to each printk message line
		[deprecated, see 'printk.time']

drivers/acpi/thermal.c

+129 −14

Original line number	Diff line number	Diff line
		@@ -33,6 +33,7 @@

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/dmi.h>
		#include <linux/init.h>
		#include <linux/types.h>
		#include <linux/proc_fs.h>
		@@ -74,10 +75,26 @@ MODULE_AUTHOR("Paul Diefenbaugh");
		MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
		MODULE_LICENSE("GPL");

		static int act;
		module_param(act, int, 0644);
		MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.\n");

		static int tzp;
		module_param(tzp, int, 0);
		module_param(tzp, int, 0444);
		MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");

		static int nocrt;
		module_param(nocrt, int, 0);
		MODULE_PARM_DESC(nocrt, "Set to disable action on ACPI thermal zone critical and hot trips.\n");

		static int off;
		module_param(off, int, 0);
		MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n");

		static int psv;
		module_param(psv, int, 0644);
		MODULE_PARM_DESC(psv, "Disable or override all passive trip points.\n");

		static int acpi_thermal_add(struct acpi_device *device);
		static int acpi_thermal_remove(struct acpi_device *device, int type);
		static int acpi_thermal_resume(struct acpi_device *device);
		@@ -339,9 +356,16 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)

		/* Passive: Processors (optional) */

		status =
		acpi_evaluate_integer(tz->device->handle, "_PSV", NULL,
		&tz->trips.passive.temperature);
		if (psv == -1) {
		status = AE_SUPPORT;
		} else if (psv > 0) {
		tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
		status = AE_OK;
		} else {
		status = acpi_evaluate_integer(tz->device->handle,
		"_PSV", NULL, &tz->trips.passive.temperature);
		}

		if (ACPI_FAILURE(status)) {
		tz->trips.passive.flags.valid = 0;
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n"));
		@@ -386,11 +410,33 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)

		char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };

		status =
		acpi_evaluate_integer(tz->device->handle, name, NULL,
		&tz->trips.active[i].temperature);
		if (ACPI_FAILURE(status))
		if (act == -1)
		break; /* disable all active trip points */

		status = acpi_evaluate_integer(tz->device->handle,
		name, NULL, &tz->trips.active[i].temperature);

		if (ACPI_FAILURE(status)) {
		if (i == 0) /* no active trip points */
		break;
		if (act <= 0) /* no override requested */
		break;
		if (i == 1) { /* 1 trip point */
		tz->trips.active[0].temperature =
		CELSIUS_TO_KELVIN(act);
		} else { /* multiple trips */
		/*
		* Don't allow override higher than
		* the next higher trip point
		*/
		tz->trips.active[i - 1].temperature =
		(tz->trips.active[i - 2].temperature <
		CELSIUS_TO_KELVIN(act) ?
		tz->trips.active[i - 2].temperature :
		CELSIUS_TO_KELVIN(act));
		}
		break;
		}

		name[2] = 'L';
		status =
		@@ -427,7 +473,7 @@ static int acpi_thermal_get_devices(struct acpi_thermal *tz)

		static int acpi_thermal_critical(struct acpi_thermal *tz)
		{
		if (!tz \|\| !tz->trips.critical.flags.valid)
		if (!tz \|\| !tz->trips.critical.flags.valid \|\| nocrt)
		return -EINVAL;

		if (tz->temperature >= tz->trips.critical.temperature) {
		@@ -449,7 +495,7 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)

		static int acpi_thermal_hot(struct acpi_thermal *tz)
		{
		if (!tz \|\| !tz->trips.hot.flags.valid)
		if (!tz \|\| !tz->trips.hot.flags.valid \|\| nocrt)
		return -EINVAL;

		if (tz->temperature >= tz->trips.hot.temperature) {
		@@ -824,12 +870,14 @@ static int acpi_thermal_trip_seq_show(struct seq_file seq, void offset)
		goto end;

		if (tz->trips.critical.flags.valid)
		seq_printf(seq, "critical (S5): %ld C\n",
		KELVIN_TO_CELSIUS(tz->trips.critical.temperature));
		seq_printf(seq, "critical (S5): %ld C%s",
		KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
		nocrt ? " <disabled>\n" : "\n");

		if (tz->trips.hot.flags.valid)
		seq_printf(seq, "hot (S4): %ld C\n",
		KELVIN_TO_CELSIUS(tz->trips.hot.temperature));
		seq_printf(seq, "hot (S4): %ld C%s",
		KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
		nocrt ? " <disabled>\n" : "\n");

		if (tz->trips.passive.flags.valid) {
		seq_printf(seq,
		@@ -1281,11 +1329,78 @@ static int acpi_thermal_resume(struct acpi_device *device)
		return AE_OK;
		}

		#ifdef CONFIG_DMI
		static int thermal_act(struct dmi_system_id *d) {

		if (act == 0) {
		printk(KERN_NOTICE "ACPI: %s detected: "
		"disabling all active thermal trip points\n", d->ident);
		act = -1;
		}
		return 0;
		}
		static int thermal_tzp(struct dmi_system_id *d) {

		if (tzp == 0) {
		printk(KERN_NOTICE "ACPI: %s detected: "
		"enabling thermal zone polling\n", d->ident);
		tzp = 300; /* 300 dS = 30 Seconds */
		}
		return 0;
		}
		static int thermal_psv(struct dmi_system_id *d) {

		if (psv == 0) {
		printk(KERN_NOTICE "ACPI: %s detected: "
		"disabling all passive thermal trip points\n", d->ident);
		psv = -1;
		}
		return 0;
		}

		static struct dmi_system_id thermal_dmi_table[] __initdata = {
		/*
		* Award BIOS on this AOpen makes thermal control almost worthless.
		* http://bugzilla.kernel.org/show_bug.cgi?id=8842
		*/
		{
		.callback = thermal_act,
		.ident = "AOpen i915GMm-HFS",
		.matches = {
		DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
		DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
		},
		},
		{
		.callback = thermal_psv,
		.ident = "AOpen i915GMm-HFS",
		.matches = {
		DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
		DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
		},
		},
		{
		.callback = thermal_tzp,
		.ident = "AOpen i915GMm-HFS",
		.matches = {
		DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
		DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
		},
		},
		{}
		};
		#endif /* CONFIG_DMI */

		static int __init acpi_thermal_init(void)
		{
		int result = 0;

		dmi_check_system(thermal_dmi_table);

		if (off) {
		printk(KERN_NOTICE "ACPI: thermal control disabled\n");
		return -ENODEV;
		}
		acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
		if (!acpi_thermal_dir)
		return -ENODEV;