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usb: dwc3: gadget: Use SET_EP_PRIME for NoStream

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DWC_usb32 v1.00a and later can use SET_EP_PRIME command to reinitiate a
stream. Use the command to handle NoStream rejection instead of ending
and restarting the endpoint.

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Thinh Nguyen 2020-05-05 19:47:15 -07:00 committed by Felipe Balbi
parent 140ca4cfea
commit b10e1c2535
2 changed files with 13 additions and 3 deletions
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3
drivers/usb/dwc3/core.h
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@ -1161,6 +1161,9 @@ struct dwc3 {
#define DWC31_REVISION_180A 0x3138302a
#define DWC31_REVISION_190A 0x3139302a
#define DWC32_REVISION_ANY 0x0
#define DWC32_REVISION_100A 0x3130302a
u32 version_type;
#define DWC31_VERSIONTYPE_ANY 0x0

13
drivers/usb/dwc3/gadget.c
View File

@ -2844,9 +2844,16 @@ static void dwc3_gadget_endpoint_stream_event(struct dwc3_ep *dep,
* hosts, force to reinitate the stream until the host is ready
* instead of waiting for the host to prime the endpoint.
*/
dep->flags |= DWC3_EP_DELAY_START;
dwc3_stop_active_transfer(dep, true, true);
return;
if (DWC3_VER_IS_WITHIN(DWC32, 100A, ANY)) {
unsigned int cmd = DWC3_DGCMD_SET_ENDPOINT_PRIME;
dwc3_send_gadget_generic_command(dwc, cmd, dep->number);
} else {
dep->flags |= DWC3_EP_DELAY_START;
dwc3_stop_active_transfer(dep, true, true);
return;
}
break;
}
out: