diff options
Diffstat (limited to 'drivers/media/video/pwc/pwc-if.c')
| -rw-r--r-- | drivers/media/video/pwc/pwc-if.c | 48 |
1 files changed, 27 insertions, 21 deletions
diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c index be4406a7c80a..943d37ad0d33 100644 --- a/drivers/media/video/pwc/pwc-if.c +++ b/drivers/media/video/pwc/pwc-if.c @@ -134,7 +134,6 @@ static int default_fps = 10; #endif static int power_save = -1; static int led_on = 100, led_off; /* defaults to LED that is on while in use */ -static int pwc_preferred_compression = 1; /* 0..3 = uncompressed..high */ static struct { int type; char serial_number[30]; @@ -372,6 +371,7 @@ static int pwc_isoc_init(struct pwc_device *pdev) int i, j, ret; struct usb_interface *intf; struct usb_host_interface *idesc = NULL; + int compression = 0; /* 0..3 = uncompressed..high */ if (pdev->iso_init) return 0; @@ -383,6 +383,12 @@ static int pwc_isoc_init(struct pwc_device *pdev) pdev->visoc_errors = 0; udev = pdev->udev; +retry: + /* We first try with low compression and then retry with a higher + compression setting if there is not enough bandwidth. */ + ret = pwc_set_video_mode(pdev, pdev->width, pdev->height, + pdev->vframes, &compression); + /* Get the current alternate interface, adjust packet size */ intf = usb_ifnum_to_if(udev, 0); if (intf) @@ -405,9 +411,12 @@ static int pwc_isoc_init(struct pwc_device *pdev) } /* Set alternate interface */ - ret = 0; PWC_DEBUG_OPEN("Setting alternate interface %d\n", pdev->valternate); ret = usb_set_interface(pdev->udev, 0, pdev->valternate); + if (ret == -ENOSPC && compression < 3) { + compression++; + goto retry; + } if (ret < 0) return ret; @@ -451,6 +460,12 @@ static int pwc_isoc_init(struct pwc_device *pdev) /* link */ for (i = 0; i < MAX_ISO_BUFS; i++) { ret = usb_submit_urb(pdev->urbs[i], GFP_KERNEL); + if (ret == -ENOSPC && compression < 3) { + compression++; + pdev->iso_init = 1; + pwc_isoc_cleanup(pdev); + goto retry; + } if (ret) { PWC_ERROR("isoc_init() submit_urb %d failed with error %d\n", i, ret); pdev->iso_init = 1; @@ -743,14 +758,16 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count) /* Turn on camera and set LEDS on */ pwc_camera_power(pdev, 1); - if (pdev->power_save) { - /* Restore video mode */ - pwc_set_video_mode(pdev, pdev->width, pdev->height, - pdev->vframes, pdev->vcompression); - } pwc_set_leds(pdev, led_on, led_off); r = pwc_isoc_init(pdev); + if (r) { + /* If we failed turn camera and LEDS back off */ + pwc_set_leds(pdev, 0, 0); + pwc_camera_power(pdev, 0); + /* And cleanup any queued bufs!! */ + pwc_cleanup_queued_bufs(pdev); + } leave: mutex_unlock(&pdev->udevlock); return r; @@ -798,6 +815,7 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id int vendor_id, product_id, type_id; int hint, rc; int features = 0; + int compression = 0; int video_nr = -1; /* default: use next available device */ int my_power_save = power_save; char serial_number[30], *name; @@ -1068,7 +1086,6 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id INIT_LIST_HEAD(&pdev->queued_bufs); pdev->udev = udev; - pdev->vcompression = pwc_preferred_compression; pdev->power_save = my_power_save; /* Init videobuf2 queue structure */ @@ -1121,8 +1138,8 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id pwc_set_leds(pdev, 0, 0); /* Setup intial videomode */ - rc = pwc_set_video_mode(pdev, MAX_WIDTH, MAX_HEIGHT, - pdev->vframes, pdev->vcompression); + rc = pwc_set_video_mode(pdev, MAX_WIDTH, MAX_HEIGHT, pdev->vframes, + &compression); if (rc) goto err_free_mem; @@ -1227,7 +1244,6 @@ static void usb_pwc_disconnect(struct usb_interface *intf) */ static int fps; -static int compression = -1; static int leds[2] = { -1, -1 }; static unsigned int leds_nargs; static char *dev_hint[MAX_DEV_HINTS]; @@ -1238,7 +1254,6 @@ module_param(fps, int, 0444); module_param_named(trace, pwc_trace, int, 0644); #endif module_param(power_save, int, 0644); -module_param(compression, int, 0444); module_param_array(leds, int, &leds_nargs, 0444); module_param_array(dev_hint, charp, &dev_hint_nargs, 0444); @@ -1247,7 +1262,6 @@ MODULE_PARM_DESC(fps, "Initial frames per second. Varies with model, useful rang MODULE_PARM_DESC(trace, "For debugging purposes"); #endif MODULE_PARM_DESC(power_save, "Turn power saving for new cameras on or off"); -MODULE_PARM_DESC(compression, "Preferred compression quality. Range 0 (uncompressed) to 3 (high compression)"); MODULE_PARM_DESC(leds, "LED on,off time in milliseconds"); MODULE_PARM_DESC(dev_hint, "Device node hints"); @@ -1281,14 +1295,6 @@ static int __init usb_pwc_init(void) PWC_DEBUG_MODULE("Default framerate set to %d.\n", default_fps); } - if (compression >= 0) { - if (compression > 3) { - PWC_ERROR("Invalid compression setting; use a number between 0 (uncompressed) and 3 (high).\n"); - return -EINVAL; - } - pwc_preferred_compression = compression; - PWC_DEBUG_MODULE("Preferred compression set to %d.\n", pwc_preferred_compression); - } if (leds[0] >= 0) led_on = leds[0]; if (leds[1] >= 0) |