V4L/DVB (3374): Adds debuging v4l2_memory enum

Some cleanup on printing enum names.
v4l2_memory now translated also to name.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/v4l2-common.c

@@ -170,7 +170,7 @@ int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local)
 
 
 /* ----------------------------------------------------------------- */
-/* some arrays for pretty-printing debug messages                    */
+/* some arrays for pretty-printing debug messages of enum types      */
 
 char *v4l2_field_names[] = {
 	[V4L2_FIELD_ANY]        = "any",
@@ -191,6 +191,14 @@ char *v4l2_type_names[] = {
 	[V4L2_BUF_TYPE_VBI_OUTPUT]    = "vbi-out",
 };
 
+static char *v4l2_memory_names[] = {
+	[V4L2_MEMORY_MMAP]    = "mmap",
+	[V4L2_MEMORY_USERPTR] = "userptr",
+	[V4L2_MEMORY_OVERLAY] = "overlay",
+};
+
+#define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
+
 /* ------------------------------------------------------------------ */
 /* debug help functions                                               */
 
@@ -328,8 +336,7 @@ static void v4l_print_pix_fmt (char *s, struct v4l2_pix_format *fmt)
 	printk ("%s: width=%d, height=%d, format=%d, field=%s, "
 		"bytesperline=%d sizeimage=%d, colorspace=%d\n", s,
 		fmt->width,fmt->height,fmt->pixelformat,
-		((fmt->field>=0)&&(fmt->field<ARRAY_SIZE(v4l2_field_names)))?
-		v4l2_field_names[fmt->field]:"unknown",
+		prt_names(fmt->field,v4l2_field_names),
 		fmt->bytesperline,fmt->sizeimage,fmt->colorspace);
 };
 
@@ -461,17 +468,18 @@ void v4l_printk_ioctl_arg(char *s,unsigned int cmd, void *arg)
 		struct v4l2_timecode *tc=&p->timecode;
 		printk ("%s: %02ld:%02d:%02d.%08ld index=%d, type=%s, "
 			"bytesused=%d, flags=0x%08d, "
-			"field=%0d, sequence=%d, memory=%d, offset/userptr=0x%08lx\n",
+			"field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx\n",
 				s,
 				(p->timestamp.tv_sec/3600),
 				(int)(p->timestamp.tv_sec/60)%60,
 				(int)(p->timestamp.tv_sec%60),
 				p->timestamp.tv_usec,
 				p->index,
-				((p->type>=0)&&(p->type<ARRAY_SIZE(v4l2_type_names)))?
-				v4l2_type_names[p->type]:"unknown",
+				prt_names(p->type,v4l2_type_names),
 				p->bytesused,p->flags,
-				p->field,p->sequence,p->memory,p->m.userptr);
+				p->field,p->sequence,
+				prt_names(p->memory,v4l2_memory_names),
+				p->m.userptr);
 		printk ("%s: timecode= %02d:%02d:%02d type=%d, "
 			"flags=0x%08d, frames=%d, userbits=0x%08x",
 				s,tc->hours,tc->minutes,tc->seconds,
@@ -536,8 +544,7 @@ void v4l_printk_ioctl_arg(char *s,unsigned int cmd, void *arg)
 	{
 		struct v4l2_format *p=arg;
 		printk ("%s: type=%s\n", s,
-				((p->type>=0)&&(p->type<ARRAY_SIZE(v4l2_type_names)))?
-				v4l2_type_names[p->type]:"unknown");
+				prt_names(p->type,v4l2_type_names));
 		switch (p->type) {
 		case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 			v4l_print_pix_fmt (s, &p->fmt.pix);
@@ -646,8 +653,10 @@ void v4l_printk_ioctl_arg(char *s,unsigned int cmd, void *arg)
 	case VIDIOC_REQBUFS:
 	{
 		struct v4l2_requestbuffers *p=arg;
-		printk ("%s: count=%d, type=%d, memory=%d\n", s,
-				p->count,p->type,p->memory);
+		printk ("%s: count=%d, type=%s, memory=%s\n", s,
+				p->count,
+				prt_names(p->type,v4l2_type_names),
+				prt_names(p->memory,v4l2_memory_names));
 		break;
 	}
 	case VIDIOC_INT_S_AUDIO_ROUTING: