V4L/DVB (6995): ubvision: add adjust_X_Offset/adjust_Y_Offset parms

Add adjust_X_Offset/adjust_Y_Offset module parameters to allow users
to tune X and Y picture offsets for their almost-working tuners without
repetitive recompilation.

Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/media/video/usbvision/usbvision-core.c b/drivers/media/video/usbvision/usbvision-core.c
index 9e404b87d00..1e52a0387aa 100644
--- a/drivers/media/video/usbvision/usbvision-core.c
+++ b/drivers/media/video/usbvision/usbvision-core.c
@@ -69,6 +69,15 @@ static int SwitchSVideoInput = 0;			// To help people with Black and White outpu
 module_param(SwitchSVideoInput, int, 0444);
 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
 
+static unsigned int adjust_X_Offset = -1;
+module_param(adjust_X_Offset, int, 0644);
+MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
+
+static unsigned int adjust_Y_Offset = -1;
+module_param(adjust_Y_Offset, int, 0644);
+MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
+
+
 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
 
 
@@ -2097,11 +2106,21 @@ int usbvision_set_input(struct usb_usbvision *usbvision)
                 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
         }
 
+        if (adjust_X_Offset != -1) {
+                value[4] = adjust_X_Offset & 0xff;
+                value[5] = (adjust_X_Offset & 0x0300) >> 8;
+        }
+
         if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
                 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
                 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
         }
 
+        if (adjust_Y_Offset != -1) {
+                value[6] = adjust_Y_Offset & 0xff;
+                value[7] = (adjust_Y_Offset & 0x0300) >> 8;
+        }
+
         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
                              USBVISION_OP_CODE, /* USBVISION specific code */
                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,