[RFC][PATCH 1/2] Sensor orientation reporting

[Adam Baker <linux@baker-net.org.uk>]

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.

Signed-off-by: Adam Baker <linux@baker-net.org.uk>

---
diff -r 1248509d8bed linux/drivers/media/video/gspca/gspca.c
--- a/linux/drivers/media/video/gspca/gspca.c	Sat Mar 14 08:44:42 2009 +0100
+++ b/linux/drivers/media/video/gspca/gspca.c	Sun Mar 15 22:25:34 2009 +0000
@@ -1147,6 +1147,7 @@ static int vidioc_enum_input(struct file
 	if (input->index != 0)
 		return -EINVAL;
 	input->type = V4L2_INPUT_TYPE_CAMERA;
+	input->status = gspca_dev->input_flags;
 	strncpy(input->name, gspca_dev->sd_desc->name,
 		sizeof input->name);
 	return 0;
diff -r 1248509d8bed linux/drivers/media/video/gspca/gspca.h
--- a/linux/drivers/media/video/gspca/gspca.h	Sat Mar 14 08:44:42 2009 +0100
+++ b/linux/drivers/media/video/gspca/gspca.h	Sun Mar 15 22:25:34 2009 +0000
@@ -168,6 +168,7 @@ struct gspca_dev {
 	__u8 alt;			/* USB alternate setting */
 	__u8 nbalt;			/* number of USB alternate settings */
 	u8 bulk;			/* image transfer by 0:isoc / 1:bulk */
+	u32 input_flags;		/* value for ENUM_INPUT status flags */
 };
 
 int gspca_dev_probe(struct usb_interface *intf,
diff -r 1248509d8bed linux/drivers/media/video/gspca/sq905.c
--- a/linux/drivers/media/video/gspca/sq905.c	Sat Mar 14 08:44:42 2009 +0100
+++ b/linux/drivers/media/video/gspca/sq905.c	Sun Mar 15 22:25:34 2009 +0000
@@ -357,6 +357,12 @@ static int sd_init(struct gspca_dev *gsp
 	gspca_dev->cam.nmodes = ARRAY_SIZE(sq905_mode);
 	if (!(ident & SQ905_HIRES_MASK))
 		gspca_dev->cam.nmodes--;
+
+	if (ident & SQ905_ORIENTATION_MASK)
+		gspca_dev->input_flags = V4L2_IN_ST_VFLIP;
+	else
+		gspca_dev->input_flags = V4L2_IN_ST_VFLIP |
+					 V4L2_IN_ST_HFLIP;
 	return 0;
 }
 
diff -r 1248509d8bed linux/include/linux/videodev2.h
--- a/linux/include/linux/videodev2.h	Sat Mar 14 08:44:42 2009 +0100
+++ b/linux/include/linux/videodev2.h	Sun Mar 15 22:25:34 2009 +0000
@@ -736,6 +736,11 @@ 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 /* Output is flipped horizontally */
+#define V4L2_IN_ST_VFLIP       0x00000020 /* Output is 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 */