@@ -186,19 +186,6 @@ struct acpi_video_device_cap {
u8 _DDC:1; /* Return the EDID for this device */
};
-struct acpi_video_brightness_flags {
- u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
- u8 _BCL_reversed:1; /* _BCL package is in a reversed order */
- u8 _BQC_use_index:1; /* _BQC returns an index value */
-};
-
-struct acpi_video_device_brightness {
- int curr;
- int count;
- int *levels;
- struct acpi_video_brightness_flags flags;
-};
-
struct acpi_video_device {
unsigned long device_id;
struct acpi_video_device_flags flags;
@@ -344,7 +331,7 @@ static const struct thermal_cooling_device_ops video_cooling_ops = {
*/
static int
-acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
+acpi_video_device_lcd_query_levels(acpi_handle handle,
union acpi_object **levels)
{
int status;
@@ -354,7 +341,7 @@ acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
*levels = NULL;
- status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
+ status = acpi_evaluate_object(handle, "_BCL", NULL, &buffer);
if (!ACPI_SUCCESS(status))
return status;
obj = (union acpi_object *)buffer.pointer;
@@ -727,29 +714,18 @@ static int acpi_video_bqc_quirk(struct acpi_video_device *device,
return 0;
}
-
-/*
- * Arg:
- * device : video output device (LCD, CRT, ..)
- *
- * Return Value:
- * Maximum brightness level
- *
- * Allocate and initialize device->brightness.
- */
-
-static int
-acpi_video_init_brightness(struct acpi_video_device *device)
+int acpi_video_get_levels(struct acpi_device *device,
+ struct acpi_video_device_brightness **dev_br)
{
union acpi_object *obj = NULL;
int i, max_level = 0, count = 0, level_ac_battery = 0;
- unsigned long long level, level_old;
union acpi_object *o;
struct acpi_video_device_brightness *br = NULL;
- int result = -EINVAL;
+ int result = 0;
u32 value;
- if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
+ if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device->handle,
+ &obj))) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
"LCD brightness level\n"));
goto out;
@@ -822,6 +798,38 @@ acpi_video_init_brightness(struct acpi_video_device *device)
"Found unordered _BCL package"));
br->count = count;
+ *dev_br = br;
+
+out:
+ kfree(obj);
+ return result;
+out_free:
+ kfree(br);
+ goto out;
+}
+EXPORT_SYMBOL(acpi_video_get_levels);
+
+/*
+ * Arg:
+ * device : video output device (LCD, CRT, ..)
+ *
+ * Return Value:
+ * Maximum brightness level
+ *
+ * Allocate and initialize device->brightness.
+ */
+
+static int
+acpi_video_init_brightness(struct acpi_video_device *device)
+{
+ int i, max_level = 0;
+ unsigned long long level, level_old;
+ struct acpi_video_device_brightness *br = NULL;
+ int result = -EINVAL;
+
+ result = acpi_video_get_levels(device->dev, &br);
+ if (result)
+ return result;
device->brightness = br;
/* _BQC uses INDEX while _BCL uses VALUE in some laptops */
@@ -864,17 +872,13 @@ set_level:
goto out_free_levels;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "found %d brightness levels\n", count - 2));
- kfree(obj);
- return result;
+ "found %d brightness levels\n", br->count - 2));
+ return 0;
out_free_levels:
kfree(br->levels);
-out_free:
kfree(br);
-out:
device->brightness = NULL;
- kfree(obj);
return result;
}
@@ -229,29 +229,9 @@ config INTEL_SOC_DTS_THERMAL
notification methods.The other trip is a critical trip point, which
was set by the driver based on the TJ MAX temperature.
-config INT340X_THERMAL
- tristate "ACPI INT340X thermal drivers"
- depends on X86 && ACPI
- select THERMAL_GOV_USER_SPACE
- select ACPI_THERMAL_REL
- select ACPI_FAN
- help
- Newer laptops and tablets that use ACPI may have thermal sensors and
- other devices with thermal control capabilities outside the core
- CPU/SOC, for thermal safety reasons.
- They are exposed for the OS to use via the INT3400 ACPI device object
- as the master, and INT3401~INT340B ACPI device objects as the slaves.
- Enable this to expose the temperature information and cooling ability
- from these objects to userspace via the normal thermal framework.
- This means that a wide range of applications and GUI widgets can show
- the information to the user or use this information for making
- decisions. For example, the Intel Thermal Daemon can use this
- information to allow the user to select his laptop to run without
- turning on the fans.
-
-config ACPI_THERMAL_REL
- tristate
- depends on ACPI
+menu "ACPI INT340X thermal drivers"
+source drivers/thermal/int340x_thermal/Kconfig
+endmenu
menu "Texas Instruments thermal drivers"
source "drivers/thermal/ti-soc-thermal/Kconfig"
new file mode 100644
@@ -0,0 +1,41 @@
+#
+# ACPI INT340x thermal drivers configuration
+#
+
+config INT340X_THERMAL
+ tristate "ACPI INT340X thermal drivers"
+ depends on X86 && ACPI
+ select THERMAL_GOV_USER_SPACE
+ select ACPI_THERMAL_REL
+ select ACPI_FAN
+ help
+ Newer laptops and tablets that use ACPI may have thermal sensors and
+ other devices with thermal control capabilities outside the core
+ CPU/SOC, for thermal safety reasons.
+ They are exposed for the OS to use via the INT3400 ACPI device object
+ as the master, and INT3401~INT340B ACPI device objects as the slaves.
+ Enable this to expose the temperature information and cooling ability
+ from these objects to userspace via the normal thermal framework.
+ This means that a wide range of applications and GUI widgets can show
+ the information to the user or use this information for making
+ decisions. For example, the Intel Thermal Daemon can use this
+ information to allow the user to select his laptop to run without
+ turning on the fans.
+
+if INT340X_THERMAL
+
+config ACPI_THERMAL_REL
+ tristate
+ depends on ACPI
+
+config INT3406_THERMAL
+ tristate "ACPI INT3406 display thermal driver"
+ depends on ACPI_VIDEO
+ help
+ The display thermal device represents the LED/LCD display panel
+ that may or may not include touch support. The main function of
+ the display thermal device is to allow control of the display
+ brightness in order to address a thermal condition or to reduce
+ power consumed by display device.
+
+endif
@@ -1,4 +1,5 @@
obj-$(CONFIG_INT340X_THERMAL) += int3400_thermal.o
obj-$(CONFIG_INT340X_THERMAL) += int3402_thermal.o
obj-$(CONFIG_INT340X_THERMAL) += int3403_thermal.o
+obj-$(CONFIG_INT3406_THERMAL) += int3406_thermal.o
obj-$(CONFIG_ACPI_THERMAL_REL) += acpi_thermal_rel.o
new file mode 100644
@@ -0,0 +1,229 @@
+/*
+ * INT3406 thermal driver for display participant device
+ *
+ * Copyright (C) 2014, Intel Corporation
+ * Authors: Aaron Lu <aaron.lu@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+#include <linux/backlight.h>
+#include <linux/thermal.h>
+#include <acpi/video.h>
+
+#define INT3406_BRIGHTNESS_LIMITS_CHANGED 0x80
+
+struct int3406_thermal_data {
+ int upper_limit;
+ int upper_limit_index;
+ int lower_limit;
+ int lower_limit_index;
+ acpi_handle handle;
+ struct acpi_video_device_brightness *br;
+ struct backlight_device *raw_bd;
+ struct thermal_cooling_device *cooling_dev;
+};
+
+static int int3406_thermal_to_raw(int level, struct int3406_thermal_data *d)
+{
+ int max_level = d->br->levels[d->br->count - 1];
+ int raw_max = d->raw_bd->props.max_brightness;
+
+ return level * raw_max / max_level;
+}
+
+static int int3406_thermal_to_acpi(int level, struct int3406_thermal_data *d)
+{
+ int raw_max = d->raw_bd->props.max_brightness;
+ int max_level = d->br->levels[d->br->count - 1];
+
+ return level * max_level / raw_max;
+}
+
+static int
+int3406_thermal_get_max_state(struct thermal_cooling_device *cooling_dev,
+ unsigned long *state)
+{
+ struct int3406_thermal_data *d = cooling_dev->devdata;
+ int index = d->lower_limit_index ? d->lower_limit_index : 2;
+
+ *state = d->br->count - 1 - index;
+ return 0;
+}
+
+static int
+int3406_thermal_set_cur_state(struct thermal_cooling_device *cooling_dev,
+ unsigned long state)
+{
+ struct int3406_thermal_data *d = cooling_dev->devdata;
+ int level, raw_level;
+
+ if (state > d->br->count - 3)
+ return -EINVAL;
+
+ state = d->br->count - 1 - state;
+ level = d->br->levels[state];
+
+ if ((d->upper_limit && level > d->upper_limit) ||
+ (d->lower_limit && level < d->lower_limit))
+ return -EINVAL;
+
+ raw_level = int3406_thermal_to_raw(level, d);
+ return backlight_device_set_brightness(d->raw_bd, raw_level);
+}
+
+static int
+int3406_thermal_get_cur_state(struct thermal_cooling_device *cooling_dev,
+ unsigned long *state)
+{
+ struct int3406_thermal_data *d = cooling_dev->devdata;
+ int raw_level, level, i;
+
+ raw_level = d->raw_bd->props.brightness;
+ level = int3406_thermal_to_acpi(raw_level, d);
+
+ /*
+ * There is no 1:1 mapping between the firmware interface level with the
+ * raw interface level, we will have to find one that is close enough.
+ */
+ for (i = 2; i < d->br->count - 1; i++) {
+ if (level >= d->br->levels[i] && level <= d->br->levels[i + 1])
+ break;
+ }
+
+ *state = i;
+ return 0;
+}
+
+static const struct thermal_cooling_device_ops video_cooling_ops = {
+ .get_max_state = int3406_thermal_get_max_state,
+ .get_cur_state = int3406_thermal_get_cur_state,
+ .set_cur_state = int3406_thermal_set_cur_state,
+};
+
+static int int3406_thermal_get_index(int *array, int nr, int value)
+{
+ int i;
+
+ for (i = 0; i < nr; i++) {
+ if (array[i] == value)
+ break;
+ }
+ return i == nr ? -ENOENT : i;
+}
+
+static void int3406_thermal_get_limit(struct int3406_thermal_data *d)
+{
+ acpi_status status;
+ unsigned long long lower_limit, upper_limit;
+ int index;
+
+ status = acpi_evaluate_integer(d->handle, "DDDL", NULL, &lower_limit);
+ if (ACPI_SUCCESS(status)) {
+ index = int3406_thermal_get_index(d->br->levels, d->br->count,
+ lower_limit);
+ if (index > 0) {
+ d->lower_limit = (int)lower_limit;
+ d->lower_limit_index = index;
+ }
+ }
+
+ status = acpi_evaluate_integer(d->handle, "DDPC", NULL, &upper_limit);
+ if (ACPI_SUCCESS(status)) {
+ index = int3406_thermal_get_index(d->br->levels, d->br->count,
+ upper_limit);
+ if (index > 0) {
+ d->upper_limit = (int)upper_limit;
+ d->upper_limit_index = index;
+ }
+ }
+}
+
+static void int3406_notify(acpi_handle handle, u32 event, void *data)
+{
+ if (event == INT3406_BRIGHTNESS_LIMITS_CHANGED)
+ int3406_thermal_get_limit(data);
+}
+
+static int int3406_thermal_probe(struct platform_device *pdev)
+{
+ struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
+ struct int3406_thermal_data *d;
+ struct backlight_device *bd;
+ int ret;
+
+ if (!ACPI_HANDLE(&pdev->dev))
+ return -ENODEV;
+
+ d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL);
+ if (!d)
+ return -ENOMEM;
+ d->handle = ACPI_HANDLE(&pdev->dev);
+
+ bd = backlight_device_get_by_type(BACKLIGHT_RAW);
+ if (!bd)
+ return -ENODEV;
+ d->raw_bd = bd;
+
+ ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br);
+ if (ret)
+ return ret;
+
+ int3406_thermal_get_limit(d);
+
+ d->cooling_dev = thermal_cooling_device_register(acpi_device_bid(adev),
+ d, &video_cooling_ops);
+ if (IS_ERR(d->cooling_dev))
+ goto err;
+
+ ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
+ int3406_notify, d);
+ if (ret)
+ goto err_cdev;
+
+ platform_set_drvdata(pdev, d);
+
+ return 0;
+
+err_cdev:
+ thermal_cooling_device_unregister(d->cooling_dev);
+err:
+ kfree(d->br);
+ return -ENODEV;
+}
+
+static int int3406_thermal_remove(struct platform_device *pdev)
+{
+ struct int3406_thermal_data *d = platform_get_drvdata(pdev);
+
+ thermal_cooling_device_unregister(platform_get_drvdata(pdev));
+ kfree(d->br);
+ return 0;
+}
+
+static const struct acpi_device_id int3406_thermal_match[] = {
+ {"INT3406", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, int3406_thermal_match);
+
+static struct platform_driver int3406_thermal_driver = {
+ .probe = int3406_thermal_probe,
+ .remove = int3406_thermal_remove,
+ .driver = {
+ .name = "int3406 thermal",
+ .acpi_match_table = int3406_thermal_match,
+ },
+};
+
+module_platform_driver(int3406_thermal_driver);
+
+MODULE_DESCRIPTION("INT3406 Thermal driver");
+MODULE_LICENSE("GPL");
@@ -164,28 +164,19 @@ static ssize_t brightness_show(struct device *dev,
return sprintf(buf, "%d\n", bd->props.brightness);
}
-static ssize_t brightness_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
+int backlight_device_set_brightness(struct backlight_device *bd, int brightness)
{
- int rc;
- struct backlight_device *bd = to_backlight_device(dev);
- unsigned long brightness;
-
- rc = kstrtoul(buf, 0, &brightness);
- if (rc)
- return rc;
-
- rc = -ENXIO;
+ int rc = -ENXIO;
mutex_lock(&bd->ops_lock);
if (bd->ops) {
if (brightness > bd->props.max_brightness)
rc = -EINVAL;
else {
- pr_debug("set brightness to %lu\n", brightness);
+ pr_debug("set brightness to %u\n", brightness);
bd->props.brightness = brightness;
backlight_update_status(bd);
- rc = count;
+ rc = 0;
}
}
mutex_unlock(&bd->ops_lock);
@@ -194,6 +185,23 @@ static ssize_t brightness_store(struct device *dev,
return rc;
}
+EXPORT_SYMBOL(backlight_device_set_brightness);
+
+static ssize_t brightness_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ int rc;
+ struct backlight_device *bd = to_backlight_device(dev);
+ unsigned long brightness;
+
+ rc = kstrtoul(buf, 0, &brightness);
+ if (rc)
+ return rc;
+
+ rc = backlight_device_set_brightness(bd, brightness);
+
+ return rc ? rc : count;
+}
static DEVICE_ATTR_RW(brightness);
static ssize_t type_show(struct device *dev, struct device_attribute *attr,
@@ -380,7 +388,7 @@ struct backlight_device *backlight_device_register(const char *name,
}
EXPORT_SYMBOL(backlight_device_register);
-bool backlight_device_registered(enum backlight_type type)
+struct backlight_device *backlight_device_get_by_type(enum backlight_type type)
{
bool found = false;
struct backlight_device *bd;
@@ -394,7 +402,13 @@ bool backlight_device_registered(enum backlight_type type)
}
mutex_unlock(&backlight_dev_list_mutex);
- return found;
+ return found ? bd : NULL;
+}
+EXPORT_SYMBOL(backlight_device_get_by_type);
+
+bool backlight_device_registered(enum backlight_type type)
+{
+ return backlight_device_get_by_type(type) ? true : false;
}
EXPORT_SYMBOL(backlight_device_registered);
@@ -3,6 +3,19 @@
#include <linux/errno.h> /* for ENODEV */
+struct acpi_video_brightness_flags {
+ u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
+ u8 _BCL_reversed:1; /* _BCL package is in a reversed order */
+ u8 _BQC_use_index:1; /* _BQC returns an index value */
+};
+
+struct acpi_video_device_brightness {
+ int curr;
+ int count;
+ int *levels;
+ struct acpi_video_brightness_flags flags;
+};
+
struct acpi_device;
#define ACPI_VIDEO_CLASS "video"
@@ -22,6 +35,8 @@ extern void acpi_video_unregister(void);
extern void acpi_video_unregister_backlight(void);
extern int acpi_video_get_edid(struct acpi_device *device, int type,
int device_id, void **edid);
+extern int acpi_video_get_levels(struct acpi_device *device,
+ struct acpi_video_device_brightness **dev_br);
extern bool acpi_video_verify_backlight_support(void);
#else
static inline int acpi_video_register(void) { return 0; }
@@ -32,6 +47,11 @@ static inline int acpi_video_get_edid(struct acpi_device *device, int type,
{
return -ENODEV;
}
+static int acpi_video_get_levels(struct acpi_device *device,
+ struct acpi_video_device_brightness **dev_br)
+{
+ return -ENODEV;
+}
static inline bool acpi_video_verify_backlight_support(void) { return false; }
#endif
@@ -140,6 +140,8 @@ extern void backlight_force_update(struct backlight_device *bd,
extern bool backlight_device_registered(enum backlight_type type);
extern int backlight_register_notifier(struct notifier_block *nb);
extern int backlight_unregister_notifier(struct notifier_block *nb);
+extern struct backlight_device *backlight_device_get_by_type(enum backlight_type type);
+extern int backlight_device_set_brightness(struct backlight_device *bd, int brightness);
#define to_backlight_device(obj) container_of(obj, struct backlight_device, dev)