[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>

1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
index 1c5f85bf7ed4..81f788b7b242 100644
--- 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;