[media] v4l: drop v4l2_buffer.input and V4L2_BUF_FLAG_INPUT

Remove input field in struct v4l2_buffer and flag V4L2_BUF_FLAG_INPUT which
tells the former is valid. The flag is used by no driver currently.

Also change the documentation accordingly.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

8 files changed, 29 insertions, 48 deletions

diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml
index ea42ef824948..a8b374930405 100644
--- a/Documentation/DocBook/media/v4l/compat.xml
+++ b/Documentation/DocBook/media/v4l/compat.xml
@@ -2458,6 +2458,18 @@ details.</para>
       </orderedlist>
     </section>
 
+    <section>
+      <title>V4L2 in Linux 3.5</title>
+      <orderedlist>
+        <listitem>
+          <para>Replaced <structfield>input</structfield> in
+          <structname>v4l2_buffer</structname> by
+          <structfield>reserved2</structfield> and removed
+          <constant>V4L2_BUF_FLAG_INPUT</constant>.</para>
+        </listitem>
+      </orderedlist>
+    </section>
+
     <section id="other">
       <title>Relation of V4L2 to other Linux multimedia APIs</title>
 
diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml
index fd6aca2922b6..1885cc0755cb 100644
--- a/Documentation/DocBook/media/v4l/io.xml
+++ b/Documentation/DocBook/media/v4l/io.xml
@@ -683,14 +683,12 @@ memory, set by the application. See <xref linkend="userp" /> for details.
           </row>
           <row>
             <entry>__u32</entry>
-            <entry><structfield>input</structfield></entry>
+            <entry><structfield>reserved2</structfield></entry>
             <entry></entry>
-            <entry>Some video capture drivers support rapid and
-synchronous video input changes, a function useful for example in
-video surveillance applications. For this purpose applications set the
-<constant>V4L2_BUF_FLAG_INPUT</constant> flag, and this field to the
-number of a video input as in &v4l2-input; field
-<structfield>index</structfield>.</entry>
+            <entry>A place holder for future extensions and custom
+(driver defined) buffer types
+<constant>V4L2_BUF_TYPE_PRIVATE</constant> and higher. Applications
+should set this to 0.</entry>
           </row>
           <row>
             <entry>__u32</entry>
@@ -923,13 +921,6 @@ Drivers set or clear this flag when the <constant>VIDIOC_DQBUF</constant>
 ioctl is called.</entry>
           </row>
           <row>
-            <entry><constant>V4L2_BUF_FLAG_INPUT</constant></entry>
-            <entry>0x0200</entry>
-            <entry>The <structfield>input</structfield> field is valid.
-Applications set or clear this flag before calling the
-<constant>VIDIOC_QBUF</constant> ioctl.</entry>
-          </row>
-          <row>
             <entry><constant>V4L2_BUF_FLAG_PREPARED</constant></entry>
             <entry>0x0400</entry>
             <entry>The buffer has been prepared for I/O and can be queued by the
diff --git a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml
index 9caa49af580f..77ff5be0809d 100644
--- a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml
@@ -71,12 +71,9 @@ initialize the <structfield>bytesused</structfield>,
 <structfield>field</structfield> and
 <structfield>timestamp</structfield> fields, see <xref
 linkend="buffer" /> for details.
-Applications must also set <structfield>flags</structfield> to 0. If a driver
-supports capturing from specific video inputs and you want to specify a video
-input, then <structfield>flags</structfield> should be set to
-<constant>V4L2_BUF_FLAG_INPUT</constant> and the field
-<structfield>input</structfield> must be initialized to the desired input.
-The <structfield>reserved</structfield> field must be set to 0. When using
+Applications must also set <structfield>flags</structfield> to 0.
+The <structfield>reserved2</structfield> and
+<structfield>reserved</structfield> fields must be set to 0. When using
 the <link linkend="planar-apis">multi-planar API</link>, the
 <structfield>m.planes</structfield> field must contain a userspace pointer
 to a filled-in array of &v4l2-plane; and the <structfield>length</structfield>
diff --git a/drivers/media/video/cpia2/cpia2_v4l.c b/drivers/media/video/cpia2/cpia2_v4l.c
index 55e92902a76c..a62a7b739991 100644
--- a/drivers/media/video/cpia2/cpia2_v4l.c
+++ b/drivers/media/video/cpia2/cpia2_v4l.c
@@ -932,7 +932,7 @@ static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
         buf->sequence = cam->buffers[buf->index].seq;
         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
         buf->length = cam->frame_size;
-        buf->input = 0;
+        buf->reserved2 = 0;
         buf->reserved = 0;
         memset(&buf->timecode, 0, sizeof(buf->timecode));
 
diff --git a/drivers/media/video/v4l2-compat-ioctl32.c b/drivers/media/video/v4l2-compat-ioctl32.c
index 5327ad3a6390..658ba46ee9d2 100644
--- a/drivers/media/video/v4l2-compat-ioctl32.c
+++ b/drivers/media/video/v4l2-compat-ioctl32.c
@@ -327,7 +327,7 @@ struct v4l2_buffer32 {
                 compat_caddr_t  planes;
         } m;
         __u32                   length;
-        __u32                   input;
+        __u32                   reserved2;
         __u32                   reserved;
 };
 
@@ -387,8 +387,7 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
                 get_user(kp->index, &up->index) ||
                 get_user(kp->type, &up->type) ||
                 get_user(kp->flags, &up->flags) ||
-                get_user(kp->memory, &up->memory) ||
-                get_user(kp->input, &up->input))
+                get_user(kp->memory, &up->memory)
                         return -EFAULT;
 
         if (V4L2_TYPE_IS_OUTPUT(kp->type))
@@ -472,8 +471,7 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
                 put_user(kp->index, &up->index) ||
                 put_user(kp->type, &up->type) ||
                 put_user(kp->flags, &up->flags) ||
-                put_user(kp->memory, &up->memory) ||
-                put_user(kp->input, &up->input))
+                put_user(kp->memory, &up->memory)
                         return -EFAULT;
 
         if (put_user(kp->bytesused, &up->bytesused) ||
@@ -482,7 +480,8 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
                 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
                 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
                 put_user(kp->sequence, &up->sequence) ||
-                put_user(kp->reserved, &up->reserved))
+                put_user(kp->reserved2, &up->reserved2) ||
+                put_user(kp->reserved, &up->reserved)
                         return -EFAULT;
 
         if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c
index ffdf59cfe405..bf7a326b1cdc 100644
--- a/drivers/media/video/videobuf-core.c
+++ b/drivers/media/video/videobuf-core.c
@@ -359,11 +359,6 @@ static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,
                 break;
         }
 
-        if (vb->input != UNSET) {
-                b->flags |= V4L2_BUF_FLAG_INPUT;
-                b->input  = vb->input;
-        }
-
         b->field     = vb->field;
         b->timestamp = vb->ts;
         b->bytesused = vb->size;
@@ -402,7 +397,6 @@ int __videobuf_mmap_setup(struct videobuf_queue *q,
                         break;
 
                 q->bufs[i]->i      = i;
-                q->bufs[i]->input  = UNSET;
                 q->bufs[i]->memory = memory;
                 q->bufs[i]->bsize  = bsize;
                 switch (memory) {
@@ -566,16 +560,6 @@ int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b)
                 goto done;
         }
 
-        if (b->flags & V4L2_BUF_FLAG_INPUT) {
-                if (b->input >= q->inputs) {
-                        dprintk(1, "qbuf: wrong input.\n");
-                        goto done;
-                }
-                buf->input = b->input;
-        } else {
-                buf->input = UNSET;
-        }
-
         switch (b->memory) {
         case V4L2_MEMORY_MMAP:
                 if (0 == buf->baddr) {
diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c
index 9d4e9edbd2e7..ec24718b3ed0 100644
--- a/drivers/media/video/videobuf2-core.c
+++ b/drivers/media/video/videobuf2-core.c
@@ -336,9 +336,9 @@ static int __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b)
         struct vb2_queue *q = vb->vb2_queue;
         int ret;
 
-        /* Copy back data such as timestamp, flags, input, etc. */
+        /* Copy back data such as timestamp, flags, etc. */
         memcpy(b, &vb->v4l2_buf, offsetof(struct v4l2_buffer, m));
-        b->input = vb->v4l2_buf.input;
+        b->reserved2 = vb->v4l2_buf.reserved2;
         b->reserved = vb->v4l2_buf.reserved;
 
         if (V4L2_TYPE_IS_MULTIPLANAR(q->type)) {
@@ -860,7 +860,6 @@ static int __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b,
 
         vb->v4l2_buf.field = b->field;
         vb->v4l2_buf.timestamp = b->timestamp;
-        vb->v4l2_buf.input = b->input;
         vb->v4l2_buf.flags = b->flags & ~V4L2_BUFFER_STATE_FLAGS;
 
         return 0;
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index f79d0cc565ab..a61edb353273 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -657,7 +657,7 @@ struct v4l2_buffer {
                 struct v4l2_plane *planes;
         } m;
         __u32                   length;
-        __u32                   input;
+        __u32                   reserved2;
         __u32                   reserved;
 };
 
@@ -671,7 +671,6 @@ struct v4l2_buffer {
 /* Buffer is ready, but the data contained within is corrupted. */
 #define V4L2_BUF_FLAG_ERROR     0x0040
 #define V4L2_BUF_FLAG_TIMECODE  0x0100  /* timecode field is valid */
-#define V4L2_BUF_FLAG_INPUT     0x0200  /* input field is valid */
 #define V4L2_BUF_FLAG_PREPARED  0x0400  /* Buffer is prepared for queuing */
 /* Cache handling flags */
 #define V4L2_BUF_FLAG_NO_CACHE_INVALIDATE       0x0800