diff options
| author | Rai, Amardeep <amardeep.rai@intel.com> | 2025-08-20 17:38:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-06 15:25:05 +0200 |
| commit | 0666a012d25051d6d2b4e6b2c893e2f074b87d91 (patch) | |
| tree | 3934b0d8eba30b5268ae37cda04b72ab9181b670 /drivers/usb/core | |
| parent | 0c670dc882d31f0423f18899c0e594547b55b76d (diff) | |
usb: core: support eUSB2 double bandwidth large isoc URB frames
eUSB2 double isochronous in bandwidth devices support up to 6 transactions
per microframe, and thus doubles the total bytes possible to receive per
microframe.
Support larger URB isoc frame sizes for eUSB2 double isoc in endpoints.
Also usb_endpoint_maxp() returns a natural number so there's no need to
assume it could be < 0.
Signed-off-by: Rai, Amardeep <amardeep.rai@intel.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Co-developed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250820143824.551777-9-sakari.ailus@linux.intel.com
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/urb.c | 14 | ||||
| -rw-r--r-- | drivers/usb/core/usb.c | 2 |
2 files changed, 12 insertions, 4 deletions
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index 7a76d5a62db1..ff8df16cca35 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -372,6 +372,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) struct usb_host_endpoint *ep; int is_out; unsigned int allowed; + bool is_eusb2_isoch_double; if (!urb || !urb->complete) return -EINVAL; @@ -434,7 +435,8 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) return -ENODEV; max = usb_endpoint_maxp(&ep->desc); - if (max <= 0) { + is_eusb2_isoch_double = usb_endpoint_is_hs_isoc_double(dev, ep); + if (!max && !is_eusb2_isoch_double) { dev_dbg(&dev->dev, "bogus endpoint ep%d%s in %s (bad maxpacket %d)\n", usb_endpoint_num(&ep->desc), is_out ? "out" : "in", @@ -467,9 +469,13 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) max = le32_to_cpu(isoc_ep_comp->dwBytesPerInterval); } - /* "high bandwidth" mode, 1-3 packets/uframe? */ - if (dev->speed == USB_SPEED_HIGH) - max *= usb_endpoint_maxp_mult(&ep->desc); + /* High speed, 1-3 packets/uframe, max 6 for eUSB2 double bw */ + if (dev->speed == USB_SPEED_HIGH) { + if (is_eusb2_isoch_double) + max = le32_to_cpu(ep->eusb2_isoc_ep_comp.dwBytesPerInterval); + else + max *= usb_endpoint_maxp_mult(&ep->desc); + } if (urb->number_of_packets <= 0) return -EINVAL; diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 939dc4aafb89..b88b6271cb30 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -1134,6 +1134,8 @@ u32 usb_endpoint_max_periodic_payload(struct usb_device *udev, case USB_SPEED_SUPER: return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval); default: + if (usb_endpoint_is_hs_isoc_double(udev, ep)) + return le32_to_cpu(ep->eusb2_isoc_ep_comp.dwBytesPerInterval); return usb_endpoint_maxp(&ep->desc) * usb_endpoint_maxp_mult(&ep->desc); } } |