V4L/DVB (8197): gspca: pac207 frames no more decoded in the subdriver.

videodev2: New pixfmt
pac207:   Remove the specific decoding.
main:     get_buff_size operation added for the subdriver.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/gspca/gspca.c

@@ -321,6 +321,7 @@ static int gspca_is_compressed(__u32 format)
 	case V4L2_PIX_FMT_MJPEG:
 	case V4L2_PIX_FMT_JPEG:
 	case V4L2_PIX_FMT_SPCA561:
+	case V4L2_PIX_FMT_PAC207:
 		return 1;
 	}
 	return 0;
@@ -380,7 +381,8 @@ static __u32 get_v4l2_depth(__u32 pixfmt)
 	case V4L2_PIX_FMT_JPEG:
 	case V4L2_PIX_FMT_SBGGR8:	/* 'BA81' Bayer */
 	case V4L2_PIX_FMT_SN9C10X:	/* 'S910' SN9C10x compression */
-	case V4L2_PIX_FMT_SPCA561:	/* 'S561' compressed BGGR bayer */
+	case V4L2_PIX_FMT_SPCA561:	/* 'S561' compressed GBRG bayer */
+	case V4L2_PIX_FMT_PAC207:	/* 'P207' compressed BGGR bayer */
 		return 8;
 	}
 	PDEBUG(D_ERR|D_CONF, "Unknown pixel format %c%c%c%c",
@@ -395,6 +397,9 @@ static int gspca_get_buff_size(struct gspca_dev *gspca_dev, int mode)
 {
 	unsigned int size;
 
+	if (gspca_dev->sd_desc->get_buff_size)
+		return gspca_dev->sd_desc->get_buff_size(gspca_dev, mode);
+
 	size =  gspca_dev->cam.cam_mode[mode].width *
 		gspca_dev->cam.cam_mode[mode].height *
 		get_v4l2_depth(gspca_dev->cam.cam_mode[mode].pixfmt) / 8;

drivers/media/video/gspca/gspca.h

@@ -80,6 +80,7 @@ typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
 				struct gspca_frame *frame,
 				__u8 *data,
 				int len);
+typedef int (*cam_get_buff_size_op) (struct gspca_dev *gspca_dev, int mode);
 
 struct ctrl {
 	struct v4l2_queryctrl qctrl;
@@ -106,6 +107,7 @@ struct sd_desc {
 	cam_jpg_op get_jcomp;
 	cam_jpg_op set_jcomp;
 	cam_qmnu_op querymenu;
+	cam_get_buff_size_op get_buff_size; /* optional */
 };
 
 /* packet types when moving from iso buf to frame buf */