Pull video into release branch

drivers/acpi/Kconfig

@@ -118,7 +118,7 @@ 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

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
    -------------------------------------------------------------------------- */
@@ -531,7 +559,6 @@ acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
 
 static void acpi_video_device_find_cap(struct acpi_video_device *device)
 {
-	acpi_integer status;
 	acpi_handle h_dummy1;
 	int i;
 	u32 max_level = 0;
@@ -565,9 +592,9 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
 		device->cap._DSS = 1;
 	}
 
-	status = acpi_video_device_lcd_query_levels(device, &obj);
+	if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
 
-	if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
+		if (obj->package.count >= 2) {
 			int count = 0;
 			union acpi_object *o;
 
@@ -588,6 +615,7 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
 						continue;
 					}
 					br->levels[count] = (u32) o->integer.value;
+
 					if (br->levels[count] > max_level)
 						max_level = br->levels[count];
 					count++;
@@ -606,9 +634,13 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
 			}
 		}
 
+	} else {
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
+	}
+
 	kfree(obj);
 
-	if (device->cap._BCL && device->cap._BCM && device->cap._BQC){
+	if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
 		unsigned long tmp;
 		static int count = 0;
 		char *name;
@@ -626,6 +658,17 @@ 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 +1712,7 @@ 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;
 }
 

drivers/video/Kconfig

@@ -12,6 +12,13 @@ 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---

drivers/video/Makefile

@@ -123,3 +123,6 @@ 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