Revert "[media] Postpone the addition of MEDIA_IOC_G_TOPOLOGY"

Enable MEDIA_IOC_G_TOPOLOGY ioctl for Kernel 4.6.

This reverts commit be0270ec.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/DocBook/media/v4l/media-ioc-g-topology.xml

@@ -48,9 +48,6 @@
 
   <refsect1>
     <title>Description</title>
-
-    <para><emphasis role="bold">NOTE:</emphasis> This new ioctl is programmed to be added on Kernel 4.6. Its definition/arguments may change until its final version.</para>
-
     <para>The typical usage of this ioctl is to call it twice.
     On the first call, the structure defined at &media-v2-topology; should
     be zeroed. At return, if no errors happen, this ioctl will return the

drivers/media/media-device.c

@@ -234,7 +234,6 @@ static long media_device_setup_link(struct media_device *mdev,
 	return ret;
 }
 
-#if 0 /* Let's postpone it to Kernel 4.6 */
 static long __media_device_get_topology(struct media_device *mdev,
 				      struct media_v2_topology *topo)
 {
@@ -390,7 +389,6 @@ static long media_device_get_topology(struct media_device *mdev,
 
 	return 0;
 }
-#endif
 
 static long media_device_ioctl(struct file *filp, unsigned int cmd,
 			       unsigned long arg)
@@ -424,14 +422,13 @@ static long media_device_ioctl(struct file *filp, unsigned int cmd,
 		mutex_unlock(&dev->graph_mutex);
 		break;
 
-#if 0 /* Let's postpone it to Kernel 4.6 */
 	case MEDIA_IOC_G_TOPOLOGY:
 		mutex_lock(&dev->graph_mutex);
 		ret = media_device_get_topology(dev,
 				(struct media_v2_topology __user *)arg);
 		mutex_unlock(&dev->graph_mutex);
 		break;
-#endif
+
 	default:
 		ret = -ENOIOCTLCMD;
 	}
@@ -480,9 +477,7 @@ static long media_device_compat_ioctl(struct file *filp, unsigned int cmd,
 	case MEDIA_IOC_DEVICE_INFO:
 	case MEDIA_IOC_ENUM_ENTITIES:
 	case MEDIA_IOC_SETUP_LINK:
-#if 0 /* Let's postpone it to Kernel 4.6 */
 	case MEDIA_IOC_G_TOPOLOGY:
-#endif
 		return media_device_ioctl(filp, cmd, arg);
 
 	case MEDIA_IOC_ENUM_LINKS32:

include/uapi/linux/media.h

@@ -286,7 +286,7 @@ struct media_links_enum {
  *	  later, before the adding this API upstream.
  */
 
-#if 0 /* Let's postpone it to Kernel 4.6 */
+
 struct media_v2_entity {
 	__u32 id;
 	char name[64];		/* FIXME: move to a property? (RFC says so) */
@@ -351,7 +351,6 @@ static inline void __user *media_get_uptr(__u64 arg)
 {
 	return (void __user *)(uintptr_t)arg;
 }
-#endif
 
 /* ioctls */
 
@@ -359,9 +358,6 @@ static inline void __user *media_get_uptr(__u64 arg)
 #define MEDIA_IOC_ENUM_ENTITIES		_IOWR('|', 0x01, struct media_entity_desc)
 #define MEDIA_IOC_ENUM_LINKS		_IOWR('|', 0x02, struct media_links_enum)
 #define MEDIA_IOC_SETUP_LINK		_IOWR('|', 0x03, struct media_link_desc)
-
-#if 0 /* Let's postpone it to Kernel 4.6 */
 #define MEDIA_IOC_G_TOPOLOGY		_IOWR('|', 0x04, struct media_v2_topology)
-#endif
 
 #endif /* __LINUX_MEDIA_H */