From: Jim Paris <jim@jtan.com>
Date: Wed, 10 Dec 2008 09:02:42 +0000 (-0300)
Subject: V4L/DVB (9876): gspca - main: Allow subdrivers to handle v4l2_streamparm requests.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=627a5ef7893fa127925b99e2597c8210202c75aa;p=mv-sheeva.git

V4L/DVB (9876): gspca - main: Allow subdrivers to handle v4l2_streamparm requests.

Add get_streamparm and set_streamparm operations so subdrivers can
get/set stream parameters such as framerate.

Signed-off-by: Jim Paris <jim@jtan.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index a5c21ca959d..76cfb096e4f 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -1327,6 +1327,17 @@ static int vidioc_g_parm(struct file *filp, void *priv,
 	memset(parm, 0, sizeof *parm);
 	parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 	parm->parm.capture.readbuffers = gspca_dev->nbufread;
+
+	if (gspca_dev->sd_desc->get_streamparm) {
+		int ret;
+
+		if (mutex_lock_interruptible(&gspca_dev->usb_lock))
+			return -ERESTARTSYS;
+		ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
+		mutex_unlock(&gspca_dev->usb_lock);
+		return ret;
+	}
+
 	return 0;
 }
 
@@ -1341,6 +1352,17 @@ static int vidioc_s_parm(struct file *filp, void *priv,
 		parm->parm.capture.readbuffers = gspca_dev->nbufread;
 	else
 		gspca_dev->nbufread = n;
+
+	if (gspca_dev->sd_desc->set_streamparm) {
+		int ret;
+
+		if (mutex_lock_interruptible(&gspca_dev->usb_lock))
+			return -ERESTARTSYS;
+		ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
+		mutex_unlock(&gspca_dev->usb_lock);
+		return ret;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
index 15db13296b8..79cef31a5e3 100644
--- a/drivers/media/video/gspca/gspca.h
+++ b/drivers/media/video/gspca/gspca.h
@@ -74,6 +74,8 @@ typedef void (*cam_v_op) (struct gspca_dev *);
 typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
 typedef int (*cam_jpg_op) (struct gspca_dev *,
 				struct v4l2_jpegcompression *);
+typedef int (*cam_streamparm_op) (struct gspca_dev *,
+				  struct v4l2_streamparm *);
 typedef int (*cam_qmnu_op) (struct gspca_dev *,
 			struct v4l2_querymenu *);
 typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
@@ -106,6 +108,8 @@ struct sd_desc {
 	cam_jpg_op get_jcomp;
 	cam_jpg_op set_jcomp;
 	cam_qmnu_op querymenu;
+	cam_streamparm_op get_streamparm;
+	cam_streamparm_op set_streamparm;
 };
 
 /* packet types when moving from iso buf to frame buf */