Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0ca849ea authored by Scott Thrasher's avatar Scott Thrasher Committed by Matthew Garrett
Browse files

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: default avatarScott Thrasher <scott.thrasher@gmail.com>
Signed-off-by: default avatarMatthew Garrett <matthew.garrett@nebula.com>
parent fe808bfb

drivers/platform/x86/samsung-laptop.c

+38 −0
Original line number Diff line number Diff line
@@ -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);