media: bttv: remove tvnorm field from bttv_buffer

Instead of storing the tvnorm in each bttv buffer separately, just use the
global bttv tvnorm because the tvnorm does not change per buffer.
Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/pci/bt8xx/bttv-driver.c

@@ -1553,7 +1553,7 @@ static int bttv_prepare_buffer(struct videobuf_queue *q,struct bttv *btv,
 	/* alloc + fill struct bttv_buffer (if changed) */
 	if (buf->vb.width != width || buf->vb.height != height ||
 	    buf->vb.field != field ||
-	    buf->tvnorm != norm || btv->fmt != fmt ||
+	    btv->tvnorm != norm || btv->fmt != fmt ||
 	    buf->crop.top != c.rect.top ||
 	    buf->crop.left != c.rect.left ||
 	    buf->crop.width != c.rect.width ||
@@ -1561,7 +1561,7 @@ static int bttv_prepare_buffer(struct videobuf_queue *q,struct bttv *btv,
 		buf->vb.width  = width;
 		buf->vb.height = height;
 		buf->vb.field  = field;
-		buf->tvnorm    = norm;
+		btv->tvnorm    = norm;
 		buf->crop      = c.rect;
 		redo_dma_risc = 1;
 	}

drivers/media/pci/bt8xx/bttv-risc.c

@@ -606,7 +606,7 @@ bttv_buffer_activate_video(struct bttv *btv,
 int
 bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
 {
-	const struct bttv_tvnorm *tvnorm = bttv_tvnorms + buf->tvnorm;
+	const struct bttv_tvnorm *tvnorm = bttv_tvnorms + btv->tvnorm;
 	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 
 	dprintk("%d: buffer field: %s  format: 0x%08x  size: %dx%d\n",

drivers/media/pci/bt8xx/bttvp.h

@@ -145,7 +145,6 @@ struct bttv_buffer {
 	struct videobuf_buffer     vb;
 
 	/* bttv specific */
-	unsigned int               tvnorm;
 	int                        btformat;
 	int                        btswap;
 	struct bttv_geometry       geo;