V4L/DVB (11387): Sensor orientation reporting

Add support to the SQ-905 driver to pass back to user space the
sensor orientation information obtained from the camera during init.
Modifies gspca and the videodev2.h header to create the necessary
API.

[mchehab@redhat.com: Changed "Output is" to "Frames are" at the comments, as suggested at LMML]
Signed-off-by: NAdam Baker <linux@baker-net.org.uk>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/gspca.c

@@ -1132,6 +1132,7 @@ static int vidioc_enum_input(struct file *file, void *priv,
 	if (input->index != 0)
 		return -EINVAL;
 	input->type = V4L2_INPUT_TYPE_CAMERA;
+	input->status = gspca_dev->cam.input_flags;
 	strncpy(input->name, gspca_dev->sd_desc->name,
 		sizeof input->name);
 	return 0;

drivers/media/video/gspca/gspca.h

@@ -56,6 +56,7 @@ struct cam {
 				 * - cannot be > MAX_NURBS
 				 * - when 0 and bulk_size != 0 means
 				 *   1 URB and submit done by subdriver */
+	u32 input_flags;	/* value for ENUM_INPUT status flags */
 };
 
 struct gspca_dev;

drivers/media/video/gspca/sq905.c

@@ -360,6 +360,12 @@ static int sd_init(struct gspca_dev *gspca_dev)
 	gspca_dev->cam.nmodes = ARRAY_SIZE(sq905_mode);
 	if (!(ident & SQ905_HIRES_MASK))
 		gspca_dev->cam.nmodes--;
+
+	if (ident & SQ905_ORIENTATION_MASK)
+		gspca_dev->cam.input_flags = V4L2_IN_ST_VFLIP;
+	else
+		gspca_dev->cam.input_flags = V4L2_IN_ST_VFLIP |
+					     V4L2_IN_ST_HFLIP;
 	return 0;
 }
 

include/linux/videodev2.h

@@ -737,6 +737,11 @@ struct v4l2_input {
 #define V4L2_IN_ST_NO_SIGNAL   0x00000002
 #define V4L2_IN_ST_NO_COLOR    0x00000004
 
+/* field 'status' - sensor orientation */
+/* If sensor is mounted upside down set both bits */
+#define V4L2_IN_ST_HFLIP       0x00000010 /* Frames are flipped horizontally */
+#define V4L2_IN_ST_VFLIP       0x00000020 /* Frames are flipped vertically */
+
 /* field 'status' - analog */
 #define V4L2_IN_ST_NO_H_LOCK   0x00000100  /* No horizontal sync lock */
 #define V4L2_IN_ST_COLOR_KILL  0x00000200  /* Color killer is active */