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| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2024-12-11 00:32:19 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-24 08:56:06 +0100 |
| commit | d0c188cd8dc099e733381ed7b6a8f2d209933313 (patch) | |
| tree | d08419133e51493d7fba09de066bbf78879d34df /drivers/usb/gadget/function/f_tcm.c | |
| parent | e577ae94cd6317ddbc0ca9961c713e0621c107d1 (diff) | |
| download | linux-next-d0c188cd8dc099e733381ed7b6a8f2d209933313.tar.gz linux-next-d0c188cd8dc099e733381ed7b6a8f2d209933313.zip | |
usb: gadget: f_tcm: Increase bMaxBurst
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>
Link: https://lore.kernel.org/r/9d6265db4d138e542f281988362bc4392b034d43.1733876548.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/gadget/function/f_tcm.c')
| -rw-r--r-- | drivers/usb/gadget/function/f_tcm.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c index 4fd56ae056a3..1c93f07daa7b 100644 --- a/drivers/usb/gadget/function/f_tcm.c +++ b/drivers/usb/gadget/function/f_tcm.c @@ -1724,7 +1724,7 @@ 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, }; @@ -1732,7 +1732,7 @@ 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 = { @@ -1767,12 +1767,14 @@ 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 = { |