4 files changed, 51 insertions, 1 deletions

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 139f41f033d8..eb4855f2c606 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -124,7 +124,7 @@ config ACPI_BUTTON
 
 config ACPI_VIDEO
         tristate "Video"
-        depends on X86 && BACKLIGHT_CLASS_DEVICE
+        depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
         help
           This driver implement the ACPI Extensions For Display Adapters
           for integrated graphics devices on motherboard, as specified in
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 00d25b347255..39273dae7004 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -33,6 +33,7 @@
 #include <linux/seq_file.h>
 
 #include <linux/backlight.h>
+#include <linux/video_output.h>
 #include <asm/uaccess.h>
 
 #include <acpi/acpi_bus.h>
@@ -169,6 +170,7 @@ struct acpi_video_device {
         struct acpi_device *dev;
         struct acpi_video_device_brightness *brightness;
         struct backlight_device *backlight;
+        struct output_device *output_dev;
 };
 
 /* bus */
@@ -272,6 +274,10 @@ static int acpi_video_get_next_level(struct acpi_video_device *device,
                                      u32 level_current, u32 event);
 static void acpi_video_switch_brightness(struct acpi_video_device *device,
                                          int event);
+static int acpi_video_device_get_state(struct acpi_video_device *device,
+                            unsigned long *state);
+static int acpi_video_output_get(struct output_device *od);
+static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
 
 /*backlight device sysfs support*/
 static int acpi_video_get_brightness(struct backlight_device *bd)
@@ -297,6 +303,28 @@ static struct backlight_ops acpi_backlight_ops = {
         .update_status  = acpi_video_set_brightness,
 };
 
+/*video output device sysfs support*/
+static int acpi_video_output_get(struct output_device *od)
+{
+        unsigned long state;
+        struct acpi_video_device *vd =
+                (struct acpi_video_device *)class_get_devdata(&od->class_dev);
+        acpi_video_device_get_state(vd, &state);
+        return (int)state;
+}
+
+static int acpi_video_output_set(struct output_device *od)
+{
+        unsigned long state = od->request_state;
+        struct acpi_video_device *vd=
+                (struct acpi_video_device *)class_get_devdata(&od->class_dev);
+        return acpi_video_device_set_state(vd, state);
+}
+
+static struct output_properties acpi_output_properties = {
+        .set_state = acpi_video_output_set,
+        .get_status = acpi_video_output_get,
+};
 /* --------------------------------------------------------------------------
                                Video Management
    -------------------------------------------------------------------------- */
@@ -626,6 +654,17 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
 
                 kfree(name);
         }
+        if (device->cap._DCS && device->cap._DSS){
+                static int count = 0;
+                char *name;
+                name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+                if (!name)
+                        return;
+                sprintf(name, "acpi_video%d", count++);
+                device->output_dev = video_output_register(name,
+                                NULL, device, &acpi_output_properties);
+                kfree(name);
+        }
         return;
 }
 
@@ -1669,6 +1708,7 @@ static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
                                             ACPI_DEVICE_NOTIFY,
                                             acpi_video_device_notify);
         backlight_device_unregister(device->backlight);
+        video_output_unregister(device->output_dev);
         return 0;
 }
 
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 1132ba5ff391..6c8ffe6757e1 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -11,6 +11,13 @@ config VGASTATE
        tristate
        default n
 
+config VIDEO_OUTPUT_CONTROL
+        tristate "Lowlevel video output switch controls"
+        default m
+        help
+          This framework adds support for low-level control of the video 
+          output switch.
+
 config FB
         tristate "Support for frame buffer devices"
         ---help---
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index a916c204274f..08b7c26a5734 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -119,3 +119,6 @@ obj-$(CONFIG_FB_OF)               += offb.o
 
 # the test framebuffer is last
 obj-$(CONFIG_FB_VIRTUAL)          += vfb.o
+
+#video output switch sysfs driver
+obj-$(CONFIG_VIDEO_OUTPUT_CONTROL) += output.o