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authorScott Thrasher <scott.thrasher@gmail.com>2014-05-06 19:06:42 +0400
committerMatthew Garrett <matthew.garrett@nebula.com>2014-06-10 01:45:16 +0400
commit0ca849ea4fb86d9ee61435559f7159ed627895c3 (patch)
treea94eaa0e68879b12cdcf3a72651e54d1077e47ce /drivers/platform
parentfe808bfb59d693e07ee23c99542cd64e1f41b8c9 (diff)
downloadlinux-0ca849ea4fb86d9ee61435559f7159ed627895c3.tar.xz
platform/x86: samsung-laptop: Add support for Samsung's NP7[34]0U3E models.
These models have only 4 levels of keyboard backlight brightness and forget how to work the backlight after resuming from S3 sleep. I've added a quirk to set the appropriate number of backlight levels, and one to re-enable the keyboard backlight on resume. (Whitespace cleaned up by Matthew Garrett) Signed-off-by: Scott Thrasher <scott.thrasher@gmail.com> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/samsung-laptop.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index d1f030053176..5a5966512277 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -27,6 +27,7 @@
#include <linux/debugfs.h>
#include <linux/ctype.h>
#include <linux/efi.h>
+#include <linux/suspend.h>
#include <acpi/video.h>
/*
@@ -340,6 +341,8 @@ struct samsung_laptop {
struct samsung_laptop_debug debug;
struct samsung_quirks *quirks;
+ struct notifier_block pm_nb;
+
bool handle_backlight;
bool has_stepping_quirk;
@@ -348,6 +351,8 @@ struct samsung_laptop {
struct samsung_quirks {
bool broken_acpi_video;
+ bool four_kbd_backlight_levels;
+ bool enable_kbd_backlight;
};
static struct samsung_quirks samsung_unknown = {};
@@ -356,6 +361,11 @@ static struct samsung_quirks samsung_broken_acpi_video = {
.broken_acpi_video = true,
};
+static struct samsung_quirks samsung_np740u3e = {
+ .four_kbd_backlight_levels = true,
+ .enable_kbd_backlight = true,
+};
+
static bool force;
module_param(force, bool, 0);
MODULE_PARM_DESC(force,
@@ -1051,6 +1061,8 @@ static int __init samsung_leds_init(struct samsung_laptop *samsung)
samsung->kbd_led.brightness_set = kbd_led_set;
samsung->kbd_led.brightness_get = kbd_led_get;
samsung->kbd_led.max_brightness = 8;
+ if (samsung->quirks->four_kbd_backlight_levels)
+ samsung->kbd_led.max_brightness = 4;
ret = led_classdev_register(&samsung->platform_device->dev,
&samsung->kbd_led);
@@ -1414,6 +1426,19 @@ static void samsung_platform_exit(struct samsung_laptop *samsung)
}
}
+static int samsung_pm_notification(struct notifier_block *nb,
+ unsigned long val, void *ptr)
+{
+ struct samsung_laptop *samsung;
+
+ samsung = container_of(nb, struct samsung_laptop, pm_nb);
+ if (val == PM_POST_HIBERNATION &&
+ samsung->quirks->enable_kbd_backlight)
+ kbd_backlight_enable(samsung);
+
+ return 0;
+}
+
static int __init samsung_platform_init(struct samsung_laptop *samsung)
{
struct platform_device *pdev;
@@ -1534,6 +1559,15 @@ static struct dmi_system_id __initdata samsung_dmi_table[] = {
},
.driver_data = &samsung_broken_acpi_video,
},
+ {
+ .callback = samsung_dmi_matched,
+ .ident = "730U3E/740U3E",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
+ },
+ .driver_data = &samsung_np740u3e,
+ },
{ },
};
MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
@@ -1608,6 +1642,9 @@ static int __init samsung_init(void)
if (ret)
goto error_debugfs;
+ samsung->pm_nb.notifier_call = samsung_pm_notification;
+ register_pm_notifier(&samsung->pm_nb);
+
samsung_platform_device = samsung->platform_device;
return ret;
@@ -1633,6 +1670,7 @@ static void __exit samsung_exit(void)
struct samsung_laptop *samsung;
samsung = platform_get_drvdata(samsung_platform_device);
+ unregister_pm_notifier(&samsung->pm_nb);
samsung_debugfs_exit(samsung);
samsung_leds_exit(samsung);