V4L/DVB (11715): gspca - main: Set the number of packets per ISOC message.
The number of packets per isochronous message may now be set by the subdrivers
(default value 32).
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 ebeae6b..ae0e140 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -513,9 +513,9 @@
/* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
- npkt = ISO_MAX_SIZE / psize;
- if (npkt > ISO_MAX_PKT)
- npkt = ISO_MAX_PKT;
+ npkt = gspca_dev->cam.npkt;
+ if (npkt == 0)
+ npkt = 32; /* default value */
bsize = psize * npkt;
PDEBUG(D_STREAM,
"isoc %d pkts size %d = bsize:%d",
diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
index 85bb0fe..bd1faff 100644
--- a/drivers/media/video/gspca/gspca.h
+++ b/drivers/media/video/gspca/gspca.h
@@ -44,8 +44,6 @@
#define GSPCA_MAX_FRAMES 16 /* maximum number of video frame buffers */
/* image transfers */
#define MAX_NURBS 4 /* max number of URBs */
-#define ISO_MAX_PKT 32 /* max number of packets in an ISOC transfer */
-#define ISO_MAX_SIZE 0x8000 /* max size of one URB buffer (32 Kb) */
/* device information - set at probe time */
struct cam {
@@ -57,6 +55,8 @@
* - when 0 and bulk_size != 0 means
* 1 URB and submit done by subdriver */
u8 bulk; /* image transfer by 0:isoc / 1:bulk */
+ u8 npkt; /* number of packets in an ISOC message
+ * 0 is the default value: 32 packets */
u32 input_flags; /* value for ENUM_INPUT status flags */
};
diff --git a/drivers/media/video/gspca/sonixb.c b/drivers/media/video/gspca/sonixb.c
index 153d0a9..cf3af8d 100644
--- a/drivers/media/video/gspca/sonixb.c
+++ b/drivers/media/video/gspca/sonixb.c
@@ -877,6 +877,8 @@
cam->cam_mode = sif_mode;
cam->nmodes = ARRAY_SIZE(sif_mode);
}
+ cam->npkt = 36; /* 36 packets per ISOC message */
+
sd->brightness = BRIGHTNESS_DEF;
sd->gain = GAIN_DEF;
sd->exposure = EXPOSURE_DEF;
diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c
index c72e19d..e58ac89 100644
--- a/drivers/media/video/gspca/sonixj.c
+++ b/drivers/media/video/gspca/sonixj.c
@@ -1280,6 +1280,7 @@
cam = &gspca_dev->cam;
cam->cam_mode = vga_mode;
cam->nmodes = ARRAY_SIZE(vga_mode);
+ cam->npkt = 24; /* 24 packets per ISOC message */
sd->bridge = id->driver_info >> 16;
sd->sensor = id->driver_info >> 8;
diff --git a/drivers/media/video/gspca/vc032x.c b/drivers/media/video/gspca/vc032x.c
index e4e933c..30872cd 100644
--- a/drivers/media/video/gspca/vc032x.c
+++ b/drivers/media/video/gspca/vc032x.c
@@ -42,7 +42,7 @@
char bridge;
#define BRIDGE_VC0321 0
#define BRIDGE_VC0323 1
- char sensor;
+ u8 sensor;
#define SENSOR_HV7131R 0
#define SENSOR_MI0360 1
#define SENSOR_MI1310_SOC 2
@@ -2453,6 +2453,17 @@
struct usb_device *dev = gspca_dev->dev;
struct cam *cam;
int sensor;
+ static u8 npkt[] = { /* number of packets per ISOC message */
+ 64, /* HV7131R 0 */
+ 32, /* MI0360 1 */
+ 32, /* MI1310_SOC 2 */
+ 64, /* MI1320 3 */
+ 128, /* MI1320_SOC 4 */
+ 32, /* OV7660 5 */
+ 64, /* OV7670 6 */
+ 128, /* PO1200 7 */
+ 128, /* PO3130NC 8 */
+ };
cam = &gspca_dev->cam;
sd->bridge = id->driver_info;
@@ -2515,6 +2526,7 @@
break;
}
}
+ cam->npkt = npkt[sd->sensor];
sd->hflip = HFLIP_DEF;
sd->vflip = VFLIP_DEF;