[media] gspca: Support variable resolution
Add variable resolution support to gspca by allowing subdrivers to
specify try_fmt and enum_framesizes functions.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c
index c341bbb..f3a7ace 100644
--- a/drivers/media/usb/gspca/gspca.c
+++ b/drivers/media/usb/gspca/gspca.c
@@ -1133,6 +1133,12 @@
mode = mode2;
}
fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
+ if (gspca_dev->sd_desc->try_fmt) {
+ /* pass original resolution to subdriver try_fmt */
+ fmt->fmt.pix.width = w;
+ fmt->fmt.pix.height = h;
+ gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
+ }
/* some drivers use priv internally, zero it before giving it to
userspace */
fmt->fmt.pix.priv = 0;
@@ -1171,17 +1177,16 @@
goto out;
}
- if (ret == gspca_dev->curr_mode) {
- ret = 0;
- goto out; /* same mode */
- }
-
if (gspca_dev->streaming) {
ret = -EBUSY;
goto out;
}
gspca_dev->curr_mode = ret;
- gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret];
+ if (gspca_dev->sd_desc->try_fmt)
+ /* subdriver try_fmt can modify format parameters */
+ gspca_dev->pixfmt = fmt->fmt.pix;
+ else
+ gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret];
ret = 0;
out:
@@ -1196,6 +1201,9 @@
int i;
__u32 index = 0;
+ if (gspca_dev->sd_desc->enum_framesizes)
+ return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
+
for (i = 0; i < gspca_dev->cam.nmodes; i++) {
if (fsize->pixel_format !=
gspca_dev->cam.cam_mode[i].pixelformat)
diff --git a/drivers/media/usb/gspca/gspca.h b/drivers/media/usb/gspca/gspca.h
index 0f3d150..300642d 100644
--- a/drivers/media/usb/gspca/gspca.h
+++ b/drivers/media/usb/gspca/gspca.h
@@ -88,6 +88,10 @@
typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev,
u8 *data,
int len);
+typedef void (*cam_format_op) (struct gspca_dev *gspca_dev,
+ struct v4l2_format *fmt);
+typedef int (*cam_frmsize_op) (struct gspca_dev *gspca_dev,
+ struct v4l2_frmsizeenum *fsize);
/* subdriver description */
struct sd_desc {
@@ -109,6 +113,8 @@
cam_set_jpg_op set_jcomp;
cam_streamparm_op get_streamparm;
cam_streamparm_op set_streamparm;
+ cam_format_op try_fmt;
+ cam_frmsize_op enum_framesizes;
#ifdef CONFIG_VIDEO_ADV_DEBUG
cam_set_reg_op set_register;
cam_get_reg_op get_register;