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ANDROID: usb: Optimize the problem of slow transfer rate in USB accessory mode

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The data transfer rate using Google Restore in USB3.2 mode is slower,
only about 140MB/s at 5Gbps.

The bMaxBurst is not set, and num_fifos in
dwc3_gadget_resize_tx_fifosis 1, which results
in only 131btye of dwc3 ram space being allocated to ep.

Modify bMaxBurst to 6.
The 5Gbps rate increases from 140MB/s to 350MB/s.
The 10Gbps rate is increased from 220MB/s to 500MB/s.

Bug: 340049583
BUG: 341178033

Change-Id: I5710af32c72d0b57afaecc00c4f0909af4b9a299
Signed-off-by: Lianqin Hu <hulianqin@vivo.corp-partner.google.com>
Signed-off-by: Lianqin Hu <hulianqin@vivo.com>
(cherry picked from commit 23f2a9f5f13426263f557ff67ce8f4e3f7965d12)
Signed-off-by: Lianqin Hu <hulianqin@vivo.com>
This commit is contained in:
hulianqin 2024-05-12 20:25:02 +08:00 committed by Lianqin Hu
parent b2c2d74cae
commit 43bb9f846d
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/gadget/function/f_accessory.c
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@ -170,7 +170,7 @@ static struct usb_ss_ep_comp_descriptor acc_superspeedplus_comp_desc = {
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
/* the following 2 values can be tweaked if necessary */
/* .bMaxBurst = 0, */
.bMaxBurst = 6,
/* .bmAttributes = 0, */
};
@ -195,7 +195,7 @@ static struct usb_ss_ep_comp_descriptor acc_superspeed_comp_desc = {
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
/* the following 2 values can be tweaked if necessary */
/* .bMaxBurst = 0, */
.bMaxBurst = 6,
/* .bmAttributes = 0, */
};