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authorMichał Kępień <kernel@kempniu.pl>2017-04-05 09:49:05 +0300
committerDarren Hart (VMware) <dvhart@infradead.org>2017-04-13 20:16:06 +0300
commite06e4831d51decc23419b6c3d045f9c8c876da7d (patch)
treeaa991939fd76fe05683189f80d9b7fc187704a24 /drivers/platform
parentbd079a2cc5afe3d980f054a72bc08dbbe17c216c (diff)
downloadlinux-e06e4831d51decc23419b6c3d045f9c8c876da7d.tar.xz
platform/x86: fujitsu-laptop: clean up use_alt_lcd_levels handling
The value of each module parameter can be changed on the fly via sysfs. However, the current way of handling use_alt_lcd_levels prevents the user from dynamically switching from a value of 0 or 1 back to autodetection as the latter is only performed upon ACPI device instantiation. Fix this by moving autodetection (in a simplified form) to set_lcd_level() and changing module parameter type to int. Do not announce autodetection results in a debug message as current value of use_alt_lcd_levels can simply be read from sysfs. Clarify module parameter description. Signed-off-by: Michał Kępień <kernel@kempniu.pl> Reviewed-by: Jonathan Woithe <jwoithe@just42.net> Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/fujitsu-laptop.c26
1 files changed, 10 insertions, 16 deletions
diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 4c3bba0ceb04..e79a8cf8d705 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -347,6 +347,12 @@ static int set_lcd_level(int level)
char *method;
switch (use_alt_lcd_levels) {
+ case -1:
+ if (acpi_has_method(fujitsu_bl->acpi_handle, "SBL2"))
+ method = "SBL2";
+ else
+ method = "SBLL";
+ break;
case 1:
method = "SBL2";
break;
@@ -591,21 +597,10 @@ static int acpi_fujitsu_bl_add(struct acpi_device *device)
pr_err("_INI Method failed\n");
}
- if (use_alt_lcd_levels == -1) {
- if (acpi_has_method(NULL, "\\_SB.PCI0.LPCB.FJEX.SBL2"))
- use_alt_lcd_levels = 1;
- else
- use_alt_lcd_levels = 0;
- vdbg_printk(FUJLAPTOP_DBG_TRACE, "auto-detected usealt as %i\n",
- use_alt_lcd_levels);
- }
-
/* do config (detect defaults) */
- use_alt_lcd_levels = use_alt_lcd_levels == 1 ? 1 : 0;
disable_brightness_adjust = disable_brightness_adjust == 1 ? 1 : 0;
- vdbg_printk(FUJLAPTOP_DBG_INFO,
- "config: [alt interface: %d], [adjust disable: %d]\n",
- use_alt_lcd_levels, disable_brightness_adjust);
+ vdbg_printk(FUJLAPTOP_DBG_INFO, "config: [adjust disable: %d]\n",
+ disable_brightness_adjust);
if (get_max_brightness() <= 0)
fujitsu_bl->max_brightness = FUJITSU_LCD_N_LEVELS;
@@ -1138,9 +1133,8 @@ static void __exit fujitsu_cleanup(void)
module_init(fujitsu_init);
module_exit(fujitsu_cleanup);
-module_param(use_alt_lcd_levels, uint, 0644);
-MODULE_PARM_DESC(use_alt_lcd_levels,
- "Use alternative interface for lcd_levels (needed for Lifebook s6410).");
+module_param(use_alt_lcd_levels, int, 0644);
+MODULE_PARM_DESC(use_alt_lcd_levels, "Interface used for setting LCD brightness level (-1 = auto, 0 = force SBLL, 1 = force SBL2)");
module_param(disable_brightness_adjust, uint, 0644);
MODULE_PARM_DESC(disable_brightness_adjust, "Disable brightness adjustment .");
#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG