X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Facpi%2Fvideo.c;h=04ea697f72bff00b94cc2d1151df53d8b5d93e1e;hb=2fe83b3ad12d43799af5f3156886eca443a88bac;hp=7fd672af33ba3feb1fb4bdb11b014c993eb4a4b6;hpb=ce8c47cf88af4da2ff429933c07f203a55d5d0a1;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 7fd672af33ba..04ea697f72bf 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
    -------------------------------------------------------------------------- */
@@ -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;
@@ -565,50 +592,55 @@ 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 (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
-		int count = 0;
-		union acpi_object *o;
-
-		br = kzalloc(sizeof(*br), GFP_KERNEL);
-		if (!br) {
-			printk(KERN_ERR "can't allocate memory\n");
-		} else {
-			br->levels = kmalloc(obj->package.count *
-					     sizeof *(br->levels), GFP_KERNEL);
-			if (!br->levels)
-				goto out;
-
-			for (i = 0; i < obj->package.count; i++) {
-				o = (union acpi_object *)&obj->package.
-				    elements[i];
-				if (o->type != ACPI_TYPE_INTEGER) {
-					printk(KERN_ERR PREFIX "Invalid data\n");
-					continue;
-				}
-				br->levels[count] = (u32) o->integer.value;
-				if (br->levels[count] > max_level)
-					max_level = br->levels[count];
-				count++;
-			}
-		      out:
-			if (count < 2) {
-				kfree(br->levels);
-				kfree(br);
+	if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
+
+		if (obj->package.count >= 2) {
+			int count = 0;
+			union acpi_object *o;
+
+			br = kzalloc(sizeof(*br), GFP_KERNEL);
+			if (!br) {
+				printk(KERN_ERR "can't allocate memory\n");
 			} else {
-				br->count = count;
-				device->brightness = br;
-				ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-						  "found %d brightness levels\n",
-						  count));
+				br->levels = kmalloc(obj->package.count *
+						     sizeof *(br->levels), GFP_KERNEL);
+				if (!br->levels)
+					goto out;
+
+				for (i = 0; i < obj->package.count; i++) {
+					o = (union acpi_object *)&obj->package.
+					    elements[i];
+					if (o->type != ACPI_TYPE_INTEGER) {
+						printk(KERN_ERR PREFIX "Invalid data\n");
+						continue;
+					}
+					br->levels[count] = (u32) o->integer.value;
+
+					if (br->levels[count] > max_level)
+						max_level = br->levels[count];
+					count++;
+				}
+			      out:
+				if (count < 2) {
+					kfree(br->levels);
+					kfree(br);
+				} else {
+					br->count = count;
+					device->brightness = br;
+					ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+							  "found %d brightness levels\n",
+							  count));
+				}
 			}
 		}
+
+	} 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;
 }