From 5bbe18d74f0c163090cd16bd25e252e8806a6c75 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Wed, 4 Jan 2012 18:48:05 -0300 Subject: [PATCH] [media] pwc: Get rid of compression module parameter Instead of making this a module parameter, automatically fallback to higher compression settings if there is not enough bandwidth. Signed-off-by: Hans de Goede Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/pwc/pwc-ctrl.c | 47 +++++++++++++++-------------- drivers/media/video/pwc/pwc-if.c | 48 +++++++++++++++++------------- drivers/media/video/pwc/pwc-v4l.c | 12 +++----- drivers/media/video/pwc/pwc.h | 3 +- 4 files changed, 56 insertions(+), 54 deletions(-) diff --git a/drivers/media/video/pwc/pwc-ctrl.c b/drivers/media/video/pwc/pwc-ctrl.c index 6b9c97fff277..905d41d90c6a 100644 --- a/drivers/media/video/pwc/pwc-ctrl.c +++ b/drivers/media/video/pwc/pwc-ctrl.c @@ -168,7 +168,8 @@ int send_control_msg(struct pwc_device *pdev, request, value, pdev->vcinterface, buf, buflen); } -static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames) +static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames, + int *compression) { unsigned char buf[3]; int ret, fps; @@ -234,32 +235,35 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames) } else pdev->vbandlength = 0; + + /* Let pwc-if.c:isoc_init know we don't support higher compression */ + *compression = 3; + return 0; } static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames, - int compression) + int *compression) { unsigned char buf[13]; const struct Timon_table_entry *pChoose; int ret, fps; - if (size >= PSZ_MAX || frames < 5 || frames > 30 || compression < 0 || compression > 3) + if (size >= PSZ_MAX || frames < 5 || frames > 30 || + *compression < 0 || *compression > 3) return -EINVAL; if (size == PSZ_VGA && frames > 15) return -EINVAL; fps = (frames / 5) - 1; - /* Find a supported framerate with progressively higher compression ratios - if the preferred ratio is not available. - */ + /* Find a supported framerate with progressively higher compression */ pChoose = NULL; - while (compression <= 3) { - pChoose = &Timon_table[size][fps][compression]; - if (pChoose->alternate != 0) - break; - compression++; + while (*compression <= 3) { + pChoose = &Timon_table[size][fps][*compression]; + if (pChoose->alternate != 0) + break; + (*compression)++; } if (pChoose == NULL || pChoose->alternate == 0) return -ENOENT; /* Not supported. */ @@ -293,27 +297,25 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames, static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, - int compression) + int *compression) { const struct Kiara_table_entry *pChoose = NULL; int fps, ret; unsigned char buf[12]; - if (size >= PSZ_MAX || frames < 5 || frames > 30 || compression < 0 || compression > 3) + if (size >= PSZ_MAX || frames < 5 || frames > 30 || + *compression < 0 || *compression > 3) return -EINVAL; if (size == PSZ_VGA && frames > 15) return -EINVAL; fps = (frames / 5) - 1; - /* Find a supported framerate with progressively higher compression - ratios if the preferred ratio is not available. - Skip this step when using RAW modes. - */ - while (compression <= 3) { - pChoose = &Kiara_table[size][fps][compression]; + /* Find a supported framerate with progressively higher compression */ + while (*compression <= 3) { + pChoose = &Kiara_table[size][fps][*compression]; if (pChoose->alternate != 0) break; - compression++; + (*compression)++; } if (pChoose == NULL || pChoose->alternate == 0) return -ENOENT; /* Not supported. */ @@ -352,7 +354,7 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, } int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, - int frames, int compression) + int frames, int *compression) { int ret, size; @@ -361,7 +363,7 @@ int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, PWC_TRACE("decode_size = %d.\n", size); if (DEVICE_USE_CODEC1(pdev->type)) { - ret = set_video_mode_Nala(pdev, size, frames); + ret = set_video_mode_Nala(pdev, size, frames, compression); } else if (DEVICE_USE_CODEC3(pdev->type)) { ret = set_video_mode_Kiara(pdev, size, frames, compression); @@ -373,7 +375,6 @@ int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, PWC_ERROR("Failed to set video mode %s@%d fps; return code = %d\n", size2name[size], frames, ret); return ret; } - pdev->vcompression = compression; pdev->frame_total_size = pdev->frame_size + pdev->frame_header_size + pdev->frame_trailer_size; PWC_DEBUG_SIZE("Set resolution to %dx%d\n", pdev->width, pdev->height); return 0; 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) diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c index 097ec582ee66..36da7d400907 100644 --- a/drivers/media/video/pwc/pwc-v4l.c +++ b/drivers/media/video/pwc/pwc-v4l.c @@ -469,7 +469,7 @@ static int pwc_vidioc_try_fmt(struct pwc_device *pdev, struct v4l2_format *f) static int pwc_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) { struct pwc_device *pdev = video_drvdata(file); - int ret, pixelformat; + int ret, pixelformat, compression = 0; if (pwc_test_n_set_capt_file(pdev, file)) return -EBUSY; @@ -497,19 +497,15 @@ static int pwc_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) } PWC_DEBUG_IOCTL("Trying to set format to: width=%d height=%d fps=%d " - "compression=%d format=%c%c%c%c\n", + "format=%c%c%c%c\n", f->fmt.pix.width, f->fmt.pix.height, pdev->vframes, - pdev->vcompression, (pixelformat)&255, (pixelformat>>8)&255, (pixelformat>>16)&255, (pixelformat>>24)&255); - ret = pwc_set_video_mode(pdev, - f->fmt.pix.width, - f->fmt.pix.height, - pdev->vframes, - pdev->vcompression); + ret = pwc_set_video_mode(pdev, f->fmt.pix.width, f->fmt.pix.height, + pdev->vframes, &compression); PWC_DEBUG_IOCTL("pwc_set_video_mode(), return=%d\n", ret); diff --git a/drivers/media/video/pwc/pwc.h b/drivers/media/video/pwc/pwc.h index 5d013851ed2a..47c518fef179 100644 --- a/drivers/media/video/pwc/pwc.h +++ b/drivers/media/video/pwc/pwc.h @@ -243,7 +243,6 @@ struct pwc_device int vmax_packet_size; /* USB maxpacket size */ int vlast_packet_size; /* for frame synchronisation */ int visoc_errors; /* number of contiguous ISOC errors */ - int vcompression; /* desired compression factor */ int vbandlength; /* compressed band length; 0 is uncompressed */ char vsync; /* used by isoc handler */ char vmirror; /* for ToUCaM series */ @@ -365,7 +364,7 @@ void pwc_construct(struct pwc_device *pdev); /** Functions in pwc-ctrl.c */ /* Request a certain video mode. Returns < 0 if not possible */ extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, - int frames, int compression); + int frames, int *compression); extern unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size); extern int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value); extern int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor); -- 2.20.1