[media] bttv: fix try_fmt_vid_overlay and setup initial overlay size

try_fmt_vid_overlay should map incorrect sizes and fields to valid values.
It also expects that an initial overlay size is defined so g_fmt_vid_overlay
returns valid information.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/pci/bt8xx/bttv-driver.c b/drivers/media/pci/bt8xx/bttv-driver.c
index 0fdaef225c9e9e64ce119729881cdf35e0bde3a2..b5100da854c0d71b8993d6202f5ebfcb650345c7 100644 (file)
--- a/drivers/media/pci/bt8xx/bttv-driver.c
+++ b/drivers/media/pci/bt8xx/bttv-driver.c
@@ -2111,22 +2111,33 @@ limit_scaled_size_lock       (struct bttv_fh *               fh,
    may also adjust the current cropping parameters to get closer
    to the desired window size. */
 static int
-verify_window_lock             (struct bttv_fh *               fh,
-                        struct v4l2_window *           win,
-                        int                            adjust_size,
-                        int                            adjust_crop)
+verify_window_lock(struct bttv_fh *fh, struct v4l2_window *win,
+                        int adjust_size, int adjust_crop)
 {
        enum v4l2_field field;
        unsigned int width_mask;
        int rc;
 
-       if (win->w.width  < 48 || win->w.height < 32)
-               return -EINVAL;
+       if (win->w.width < 48)
+               win->w.width = 48;
+       if (win->w.height < 32)
+               win->w.height = 32;
        if (win->clipcount > 2048)
-               return -EINVAL;
+               win->clipcount = 2048;
 
+       win->chromakey = 0;
+       win->global_alpha = 0;
        field = win->field;
 
+       switch (field) {
+       case V4L2_FIELD_TOP:
+       case V4L2_FIELD_BOTTOM:
+       case V4L2_FIELD_INTERLACED:
+               break;
+       default:
+               field = V4L2_FIELD_ANY;
+               break;
+       }
        if (V4L2_FIELD_ANY == field) {
                __s32 height2;
 
@@ -2135,18 +2146,11 @@ verify_window_lock              (struct bttv_fh *               fh,
                        ? V4L2_FIELD_INTERLACED
                        : V4L2_FIELD_TOP;
        }
-       switch (field) {
-       case V4L2_FIELD_TOP:
-       case V4L2_FIELD_BOTTOM:
-       case V4L2_FIELD_INTERLACED:
-               break;
-       default:
-               return -EINVAL;
-       }
+       win->field = field;
 
-       /* 4-byte alignment. */
        if (NULL == fh->ovfmt)
                return -EINVAL;
+       /* 4-byte alignment. */
        width_mask = ~0;
        switch (fh->ovfmt->depth) {
        case 8:
@@ -2171,8 +2175,6 @@ verify_window_lock                (struct bttv_fh *               fh,
                               adjust_size, adjust_crop);
        if (0 != rc)
                return rc;
-
-       win->field = field;
        return 0;
 }
 
@@ -2407,9 +2409,10 @@ static int bttv_try_fmt_vid_overlay(struct file *file, void *priv,
 {
        struct bttv_fh *fh = priv;
 
-       return verify_window_lock(fh, &f->fmt.win,
+       verify_window_lock(fh, &f->fmt.win,
                        /* adjust_size */ 1,
                        /* adjust_crop */ 0);
+       return 0;
 }
 
 static int bttv_s_fmt_vid_cap(struct file *file, void *priv,
@@ -4146,6 +4149,9 @@ static int bttv_probe(struct pci_dev *dev, const struct pci_device_id *pci_id)
        btv->init.fmt         = format_by_fourcc(V4L2_PIX_FMT_BGR24);
        btv->init.width       = 320;
        btv->init.height      = 240;
+       btv->init.ov.w.width  = 320;
+       btv->init.ov.w.height = 240;
+       btv->init.ov.field    = V4L2_FIELD_INTERLACED;
        btv->input = 0;
 
        v4l2_ctrl_new_std(hdl, &bttv_ctrl_ops,