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path: root/drivers/acpi/video.c
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Diffstat (limited to 'drivers/acpi/video.c')
-rw-r--r--drivers/acpi/video.c31
1 files changed, 26 insertions, 5 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 5d7075d25700..0ec434d2586d 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -44,6 +44,8 @@
#include <linux/suspend.h>
#include <acpi/video.h>
+#include "internal.h"
+
#define PREFIX "ACPI: "
#define ACPI_VIDEO_BUS_NAME "Video Bus"
@@ -450,6 +452,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
},
{
.callback = video_ignore_initial_backlight,
+ .ident = "Fujitsu E753",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"),
+ },
+ },
+ {
+ .callback = video_ignore_initial_backlight,
.ident = "HP Pavilion dm4",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
@@ -898,6 +908,9 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
device->cap._DDC = 1;
}
+ if (acpi_video_init_brightness(device))
+ return;
+
if (acpi_video_backlight_support()) {
struct backlight_properties props;
struct pci_dev *pdev;
@@ -907,9 +920,6 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
static int count = 0;
char *name;
- result = acpi_video_init_brightness(device);
- if (result)
- return;
name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
if (!name)
return;
@@ -969,6 +979,11 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
if (result)
printk(KERN_ERR PREFIX "Create sysfs link\n");
+ } else {
+ /* Remove the brightness object. */
+ kfree(device->brightness->levels);
+ kfree(device->brightness);
+ device->brightness = NULL;
}
}
@@ -1532,14 +1547,20 @@ static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
/* acpi_video interface */
+/*
+ * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't
+ * preform any automatic brightness change on receiving a notification.
+ */
static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
{
- return acpi_video_bus_DOS(video, 0, 0);
+ return acpi_video_bus_DOS(video, 0,
+ acpi_video_backlight_quirks() ? 1 : 0);
}
static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
{
- return acpi_video_bus_DOS(video, 0, 1);
+ return acpi_video_bus_DOS(video, 0,
+ acpi_video_backlight_quirks() ? 0 : 1);
}
static void acpi_video_bus_notify(struct acpi_device *device, u32 event)