@@ -1774,7 +1774,7 @@ static struct usb_endpoint_descriptor uasp_ss_bi_desc = {
static struct usb_ss_ep_comp_descriptor uasp_bi_ep_comp_desc = {
.bLength = sizeof(uasp_bi_ep_comp_desc),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
- .bMaxBurst = 0,
+ .bMaxBurst = 15,
.bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS,
.wBytesPerInterval = 0,
};
@@ -1782,7 +1782,7 @@ static struct usb_ss_ep_comp_descriptor uasp_bi_ep_comp_desc = {
static struct usb_ss_ep_comp_descriptor bot_bi_ep_comp_desc = {
.bLength = sizeof(bot_bi_ep_comp_desc),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
- .bMaxBurst = 0,
+ .bMaxBurst = 15,
};
static struct usb_endpoint_descriptor uasp_bo_desc = {
@@ -1817,12 +1817,14 @@ static struct usb_endpoint_descriptor uasp_ss_bo_desc = {
static struct usb_ss_ep_comp_descriptor uasp_bo_ep_comp_desc = {
.bLength = sizeof(uasp_bo_ep_comp_desc),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ .bMaxBurst = 15,
.bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS,
};
static struct usb_ss_ep_comp_descriptor bot_bo_ep_comp_desc = {
.bLength = sizeof(bot_bo_ep_comp_desc),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ .bMaxBurst = 15,
};
static struct usb_endpoint_descriptor uasp_status_desc = {
Currently the default bMaxBurst is 0. Set default bMaxBurst to 15 (i.e. 16 bursts) to Data IN and OUT endpoints to improve performance. It should be fine for a controller that supports less than 16 bursts. It should be able to negotiate properly with the host at packet level for the end of burst. If the controller can't handle a burst of 16, and high performance isn't important, the user can use BOT protocol from mass_storage gadget driver instead. Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> --- Changes in v2: - None drivers/usb/gadget/function/f_tcm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)