[media] media/usb/pvrusb2: Support for V4L2_CTRL_WHICH_DEF_VAL

This driver does not use the control infrastructure.
Add support for the new field which on structure
 v4l2_ext_controls

Acked-by: Mike Isely <isely@pobox.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
index 1c5f85b..81f788b 100644 (file)
--- a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
@@ -628,6 +628,7 @@ static int pvr2_g_ext_ctrls(struct file *file, void *priv,
        struct pvr2_v4l2_fh *fh = file->private_data;
        struct pvr2_hdw *hdw = fh->channel.mc_head->hdw;
        struct v4l2_ext_control *ctrl;
+       struct pvr2_ctrl *cptr;
        unsigned int idx;
        int val;
        int ret;
@@ -635,8 +636,15 @@ static int pvr2_g_ext_ctrls(struct file *file, void *priv,
        ret = 0;
        for (idx = 0; idx < ctls->count; idx++) {
                ctrl = ctls->controls + idx;
-               ret = pvr2_ctrl_get_value(
-                               pvr2_hdw_get_ctrl_v4l(hdw, ctrl->id), &val);
+               cptr = pvr2_hdw_get_ctrl_v4l(hdw, ctrl->id);
+               if (cptr) {
+                       if (ctls->which == V4L2_CTRL_WHICH_DEF_VAL)
+                               pvr2_ctrl_get_def(cptr, &val);
+                       else
+                               ret = pvr2_ctrl_get_value(cptr, &val);
+               } else
+                       ret = -EINVAL;
+
                if (ret) {
                        ctls->error_idx = idx;
                        return ret;
@@ -658,6 +666,10 @@ static int pvr2_s_ext_ctrls(struct file *file, void *priv,
        unsigned int idx;
        int ret;
 
+       /* Default value cannot be changed */
+       if (ctls->which == V4L2_CTRL_WHICH_DEF_VAL)
+               return -EINVAL;
+
        ret = 0;
        for (idx = 0; idx < ctls->count; idx++) {
                ctrl = ctls->controls + idx;