diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c index 275f1e936304fd151087f9bbc590a3a54f951cc6..0966017ca745ab328696e29be39d347366e988f0 100644 --- a/drivers/media/video/em28xx/em28xx-core.c +++ b/drivers/media/video/em28xx/em28xx-core.c @@ -72,7 +72,8 @@ u32 em28xx_request_buffers(struct em28xx *dev, u32 count) const size_t imagesize = PAGE_ALIGN(dev->frame_size); /*needs to be page aligned cause the buffers can be mapped individually! */ void *buff = NULL; u32 i; - em28xx_coredbg("requested %i buffers with size %zi", count, imagesize); + em28xx_coredbg("requested %i buffers with size %zi\n", + count, imagesize); if (count > EM28XX_NUM_FRAMES) count = EM28XX_NUM_FRAMES; @@ -676,7 +677,7 @@ static void em28xx_isocIrq(struct urb *urb) continue; } if (urb->iso_frame_desc[i].actual_length > - dev->max_pkt_size) { + urb->iso_frame_desc[i].length) { em28xx_isocdbg("packet bigger than packet size"); continue; } @@ -722,8 +723,11 @@ void em28xx_uninit_isoc(struct em28xx *dev) for (i = 0; i < EM28XX_NUM_BUFS; i++) { if (dev->urb[i]) { usb_kill_urb(dev->urb[i]); - if (dev->transfer_buffer[i]){ - usb_buffer_free(dev->udev,(EM28XX_NUM_PACKETS*dev->max_pkt_size),dev->transfer_buffer[i],dev->urb[i]->transfer_dma); + if (dev->transfer_buffer[i]) { + usb_buffer_free(dev->udev, + dev->urb[i]->transfer_buffer_length, + dev->transfer_buffer[i], + dev->urb[i]->transfer_dma); } usb_free_urb(dev->urb[i]); } @@ -741,7 +745,10 @@ int em28xx_init_isoc(struct em28xx *dev) { /* change interface to 3 which allows the biggest packet sizes */ int i, errCode; - const int sb_size = EM28XX_NUM_PACKETS * dev->max_pkt_size; + int sb_size; + + em28xx_set_alternate(dev); + sb_size = EM28XX_NUM_PACKETS * dev->max_pkt_size; /* reset streaming vars */ dev->frame_current = NULL; @@ -750,7 +757,7 @@ int em28xx_init_isoc(struct em28xx *dev) /* allocate urbs */ for (i = 0; i < EM28XX_NUM_BUFS; i++) { struct urb *urb; - int j, k; + int j; /* allocate transfer buffer */ urb = usb_alloc_urb(EM28XX_NUM_PACKETS, GFP_KERNEL); if (!urb){ @@ -758,7 +765,9 @@ int em28xx_init_isoc(struct em28xx *dev) em28xx_uninit_isoc(dev); return -ENOMEM; } - dev->transfer_buffer[i] = usb_buffer_alloc(dev->udev, sb_size, GFP_KERNEL,&urb->transfer_dma); + dev->transfer_buffer[i] = usb_buffer_alloc(dev->udev, sb_size, + GFP_KERNEL, + &urb->transfer_dma); if (!dev->transfer_buffer[i]) { em28xx_errdev ("unable to allocate %i bytes for transfer buffer %i\n", @@ -777,16 +786,16 @@ int em28xx_init_isoc(struct em28xx *dev) urb->complete = em28xx_isocIrq; urb->number_of_packets = EM28XX_NUM_PACKETS; urb->transfer_buffer_length = sb_size; - for (j = k = 0; j < EM28XX_NUM_PACKETS; - j++, k += dev->max_pkt_size) { - urb->iso_frame_desc[j].offset = k; - urb->iso_frame_desc[j].length = - dev->max_pkt_size; + for (j = 0; j < EM28XX_NUM_PACKETS; j++) { + urb->iso_frame_desc[j].offset = j * dev->max_pkt_size; + urb->iso_frame_desc[j].length = dev->max_pkt_size; } dev->urb[i] = urb; } /* submit urbs */ + em28xx_coredbg("Submitting %d urbs of %d packets (%d each)\n", + EM28XX_NUM_BUFS, EM28XX_NUM_PACKETS, dev->max_pkt_size); for (i = 0; i < EM28XX_NUM_BUFS; i++) { errCode = usb_submit_urb(dev->urb[i], GFP_KERNEL); if (errCode) { @@ -803,22 +812,31 @@ int em28xx_init_isoc(struct em28xx *dev) int em28xx_set_alternate(struct em28xx *dev) { int errCode, prev_alt = dev->alt; - dev->alt = alt; - if (dev->alt == 0) { - int i; - for(i=0;i< dev->num_alt; i++) - if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->alt]) - dev->alt=i; - } + int i; + unsigned int min_pkt_size = dev->bytesperline+4; + + /* When image size is bigger than a ceirtain value, + the frame size should be increased, otherwise, only + green screen will be received. + */ + if (dev->frame_size > 720*240*2) + min_pkt_size *= 2; + + for (i = 0; i < dev->num_alt; i++) + if (dev->alt_max_pkt_size[i] >= min_pkt_size) + break; + dev->alt = i; if (dev->alt != prev_alt) { + em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n", + min_pkt_size, dev->alt); dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; - em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n", dev->alt, - dev->max_pkt_size); + em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n", + dev->alt, dev->max_pkt_size); errCode = usb_set_interface(dev->udev, 0, dev->alt); if (errCode < 0) { em28xx_errdev ("cannot change alternate number to %d (error=%i)\n", - dev->alt, errCode); + dev->alt, errCode); return errCode; } } diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index eeda3b2faec8a723f93f09c490b6bd124bb7c964..4abe6701a7700894624b17ad7db40547248b2f67 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1352,8 +1352,6 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp) filp->private_data = fh; if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { - em28xx_set_alternate(dev); - dev->width = norm_maxw(dev); dev->height = norm_maxh(dev); dev->frame_size = dev->width * dev->height * 2; @@ -1362,6 +1360,7 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp) dev->hscale = 0; dev->vscale = 0; + em28xx_set_alternate(dev); em28xx_capture_start(dev, 1); em28xx_resolution_set(dev); @@ -2129,6 +2128,7 @@ static int em28xx_usb_probe(struct usb_interface *interface, snprintf(dev->name, 29, "em28xx #%d", nr); dev->devno = nr; dev->model = id->driver_info; + dev->alt = -1; /* Checks if audio is provided by some interface */ for (i = 0; i < udev->config->desc.bNumInterfaces; i++) { diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h index 813c0af458d31781aafdba4a66a0083a13655a11..04e0e48ecabe54b36a6e92a70aae50623e2a8498 100644 --- a/drivers/media/video/em28xx/em28xx.h +++ b/drivers/media/video/em28xx/em28xx.h @@ -33,7 +33,7 @@ #define UNSET -1 /* maximum number of em28xx boards */ -#define EM28XX_MAXBOARDS 1 /*FIXME: should be bigger */ +#define EM28XX_MAXBOARDS 4 /*FIXME: should be bigger */ /* maximum number of frames that can be queued */ #define EM28XX_NUM_FRAMES 5