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authorMaxim Mikityanskiy <maxtram95@gmail.com>2012-12-15 19:31:30 +0200
committerMatthew Garrett <matthew.garrett@nebula.com>2013-02-24 14:49:53 -0800
commit03696e51d75a3f23feb6b63dc6f3976a64c40b12 (patch)
tree5880bd3084fb13dac505f54569dc703f267bd835 /drivers/platform
parentcdeaf3868352592b206a08039b67c80c10ade8d5 (diff)
msi-laptop: Disable brightness control for new EC
It seems that existing brightness control works only for old EC models. On newer ones auto_brightness access always timeouts and lcd_level always shows 0. So disable brightness control for new EC models. It works fine with ACPI video driver anyway. Signed-off-by: Maxim Mikityanskiy <maxtram95@gmail.com> Signed-off-by: Lee, Chun-Yi <jlee@suse.com> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/msi-laptop.c39
1 files changed, 27 insertions, 12 deletions
diff --git a/drivers/platform/x86/msi-laptop.c b/drivers/platform/x86/msi-laptop.c
index 28bcbb21d120..6b2293875672 100644
--- a/drivers/platform/x86/msi-laptop.c
+++ b/drivers/platform/x86/msi-laptop.c
@@ -546,8 +546,6 @@ static DEVICE_ATTR(turbo_cooldown, 0444, show_turbo_cooldown, NULL);
static DEVICE_ATTR(auto_fan, 0644, show_auto_fan, store_auto_fan);
static struct attribute *msipf_attributes[] = {
- &dev_attr_lcd_level.attr,
- &dev_attr_auto_brightness.attr,
&dev_attr_bluetooth.attr,
&dev_attr_wlan.attr,
&dev_attr_touchpad.attr,
@@ -558,10 +556,20 @@ static struct attribute *msipf_attributes[] = {
NULL
};
+static struct attribute *msipf_old_attributes[] = {
+ &dev_attr_lcd_level.attr,
+ &dev_attr_auto_brightness.attr,
+ NULL
+};
+
static struct attribute_group msipf_attribute_group = {
.attrs = msipf_attributes
};
+static struct attribute_group msipf_old_attribute_group = {
+ .attrs = msipf_old_attributes
+};
+
static struct platform_driver msipf_driver = {
.driver = {
.name = "msi-laptop-pf",
@@ -1062,7 +1070,7 @@ static int __init msi_init(void)
/* Register backlight stuff */
- if (acpi_video_backlight_support()) {
+ if (!quirks->old_ec_model || acpi_video_backlight_support()) {
pr_info("Brightness ignored, must be controlled by ACPI video driver\n");
} else {
struct backlight_properties props;
@@ -1108,14 +1116,19 @@ static int __init msi_init(void)
&dev_attr_threeg);
if (ret)
goto fail_platform_device2;
- }
+ } else {
+ ret = sysfs_create_group(&msipf_device->dev.kobj,
+ &msipf_old_attribute_group);
+ if (ret)
+ goto fail_platform_device2;
- /* Disable automatic brightness control by default because
- * this module was probably loaded to do brightness control in
- * software. */
+ /* Disable automatic brightness control by default because
+ * this module was probably loaded to do brightness control in
+ * software. */
- if (auto_brightness != 2)
- set_auto_brightness(auto_brightness);
+ if (auto_brightness != 2)
+ set_auto_brightness(auto_brightness);
+ }
pr_info("driver " MSI_DRIVER_VERSION " successfully loaded\n");
@@ -1163,9 +1176,11 @@ static void __exit msi_cleanup(void)
platform_driver_unregister(&msipf_driver);
backlight_device_unregister(msibl_device);
- /* Enable automatic brightness control again */
- if (auto_brightness != 2)
- set_auto_brightness(1);
+ if (quirks->old_ec_model) {
+ /* Enable automatic brightness control again */
+ if (auto_brightness != 2)
+ set_auto_brightness(1);
+ }
pr_info("driver unloaded\n");
}