diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2009-10-09 20:55:23 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-01 15:55:47 -0700 |
| commit | 692a97fe93dca8fd1e80f2d0baffa3aade767110 (patch) | |
| tree | a7e85f0fd4d667da694cf7eb3459d5286a3d323e | |
| parent | d8d6782349be3b550ebe438794c327b7373ce54e (diff) | |
V4L/DVB (13155): uvcvideo: Add a module parameter to set the streaming control timeout
commit b232a012adfea9f535702e8296ea6b76e691f436 upstream
The default streaming control timeout was found by Ondrej Zary to be too low
for some Logitech webcams. With kernel 2.6.22 and newer they would timeout
during initialization unles the audio function was initialized before the
video function.
Add a module parameter to set the streaming control timeout and increase the
default value from 1000ms to 3000ms to fix the above problem.
Thanks to Ondrej Zary for investigating the issue and providing an initial
patch.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/media/video/uvc/uvc_driver.c | 3 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvc_video.c | 4 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvcvideo.h | 3 |
3 files changed, 7 insertions, 3 deletions
diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c index 04b47832fa0a..5a8a8d1cc9c0 100644 --- a/drivers/media/video/uvc/uvc_driver.c +++ b/drivers/media/video/uvc/uvc_driver.c @@ -46,6 +46,7 @@ unsigned int uvc_no_drop_param; static unsigned int uvc_quirks_param; unsigned int uvc_trace_param; +unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; /* ------------------------------------------------------------------------ * Video formats @@ -2034,6 +2035,8 @@ module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(quirks, "Forced device quirks"); module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(trace, "Trace level bitmask"); +module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index 01b633c73480..f2480c35c265 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -130,7 +130,7 @@ static int uvc_get_video_ctrl(struct uvc_video_device *video, ret = __uvc_query_ctrl(video->dev, query, 0, video->streaming->intfnum, probe ? VS_PROBE_CONTROL : VS_COMMIT_CONTROL, data, size, - UVC_CTRL_STREAMING_TIMEOUT); + uvc_timeout_param); if ((query == GET_MIN || query == GET_MAX) && ret == 2) { /* Some cameras, mostly based on Bison Electronics chipsets, @@ -235,7 +235,7 @@ static int uvc_set_video_ctrl(struct uvc_video_device *video, ret = __uvc_query_ctrl(video->dev, SET_CUR, 0, video->streaming->intfnum, probe ? VS_PROBE_CONTROL : VS_COMMIT_CONTROL, data, size, - UVC_CTRL_STREAMING_TIMEOUT); + uvc_timeout_param); if (ret != size) { uvc_printk(KERN_ERR, "Failed to set UVC %s control : " "%d (exp. %u).\n", probe ? "probe" : "commit", diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h index 3c78d3c1e4c0..3265fbf3fc96 100644 --- a/drivers/media/video/uvc/uvcvideo.h +++ b/drivers/media/video/uvc/uvcvideo.h @@ -304,7 +304,7 @@ struct uvc_xu_control { #define UVC_MAX_STATUS_SIZE 16 #define UVC_CTRL_CONTROL_TIMEOUT 300 -#define UVC_CTRL_STREAMING_TIMEOUT 1000 +#define UVC_CTRL_STREAMING_TIMEOUT 3000 /* Devices quirks */ #define UVC_QUIRK_STATUS_INTERVAL 0x00000001 @@ -695,6 +695,7 @@ struct uvc_driver { extern unsigned int uvc_no_drop_param; extern unsigned int uvc_trace_param; +extern unsigned int uvc_timeout_param; #define uvc_trace(flag, msg...) \ do { \ |