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drivers: video: backlight: Import Xiaomi changes

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* From dagu-s-oss

Change-Id: Id2ff6138d5d0e15c0cfbf72ce6c14360c56ddc45
This commit is contained in:
Sebastiano Barezzi
2022-11-16 16:44:39 +01:00
committed by Sebastiano Barezzi
parent cf1f551047
commit 6eecf1f9b1
2 changed files with 49 additions and 4 deletions
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47
drivers/video/backlight/backlight.c
View File

@@ -119,6 +119,7 @@ static void backlight_generate_event(struct backlight_device *bd,
envp[1] = NULL;
kobject_uevent_env(&bd->dev.kobj, KOBJ_CHANGE, envp);
sysfs_notify(&bd->dev.kobj, NULL, "actual_brightness");
sysfs_notify(&bd->dev.kobj, NULL, "brightness");
}
static ssize_t bl_power_show(struct device *dev, struct device_attribute *attr,
@@ -180,6 +181,12 @@ int backlight_device_set_brightness(struct backlight_device *bd,
if (brightness > bd->props.max_brightness)
rc = -EINVAL;
else {
if ((!bd->use_count && brightness) || (bd->use_count && !brightness)) {
if (!bd->use_count)
bd->use_count++;
else
bd->use_count--;
}
pr_debug("set brightness to %lu\n", brightness);
bd->props.brightness = brightness;
rc = backlight_update_status(bd);
@@ -205,10 +212,6 @@ static ssize_t brightness_store(struct device *dev,
return rc;
bd->usr_brightness_req = brightness;
brightness = (brightness <= bd->thermal_brightness_limit) ?
bd->usr_brightness_req :
bd->thermal_brightness_limit;
rc = backlight_device_set_brightness(bd, brightness);
return rc ? rc : count;
@@ -480,6 +483,42 @@ struct backlight_device *backlight_device_get_by_type(enum backlight_type type)
}
EXPORT_SYMBOL(backlight_device_get_by_type);
struct backlight_device *backlight_device_get_by_type_a(enum backlight_type type)
{
bool found = false;
struct backlight_device *bd;
mutex_lock(&backlight_dev_list_mutex);
list_for_each_entry(bd, &backlight_dev_list, entry) {
if (bd->props.type == type && !strcmp(bd->dev.kobj.name, "KTZ8866A")) {
found = true;
break;
}
}
mutex_unlock(&backlight_dev_list_mutex);
return found ? bd : NULL;
}
EXPORT_SYMBOL(backlight_device_get_by_type_a);
struct backlight_device *backlight_device_get_by_type_b(enum backlight_type type)
{
bool found = false;
struct backlight_device *bd;
mutex_lock(&backlight_dev_list_mutex);
list_for_each_entry(bd, &backlight_dev_list, entry) {
if (bd->props.type == type && !strcmp(bd->dev.kobj.name, "KTZ8866B")) {
found = true;
break;
}
}
mutex_unlock(&backlight_dev_list_mutex);
return found ? bd : NULL;
}
EXPORT_SYMBOL(backlight_device_get_by_type_b);
/**
* backlight_device_unregister - unregisters a backlight device object.
* @bd: the backlight device object to be unregistered and freed.

6
include/linux/backlight.h
View File

@@ -69,6 +69,8 @@ struct backlight_ops {
struct backlight_properties {
/* Current User requested brightness (0 - max_brightness) */
int brightness;
int brightness_clone;
int brightness_clone_backup;
/* Maximal value for brightness (read-only) */
int max_brightness;
/* Current FB Power mode (0: full on, 1..3: power saving
@@ -111,6 +113,8 @@ struct backlight_device {
struct thermal_cooling_device *cdev;
/* Thermally limited max brightness */
int thermal_brightness_limit;
/* Thermally limited max brightness clone for 8192 hbm*/
int thermal_brightness_clone_limit;
/* User brightness request */
int usr_brightness_req;
@@ -189,6 +193,8 @@ extern void backlight_force_update(struct backlight_device *bd,
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 struct backlight_device *backlight_device_get_by_type_a(enum backlight_type type);
extern struct backlight_device *backlight_device_get_by_type_b(enum backlight_type type);
extern int backlight_device_set_brightness(struct backlight_device *bd, unsigned long brightness);
#define to_backlight_device(obj) container_of(obj, struct backlight_device, dev)