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usb: dwc3: Don't touch gadget->max_speed while limiting the speed

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The gadget->max_speed should not be changed dynamically as it can
mess up the descriptor preparation. Let it be the max supported
by the hardware and changed the dwc3->maximum_speed to force
the controller to enumerate at lower speed when needed. This makes
sure that the descriptors for all speeds are cached during bind
of the function drivers.

Change-Id: Id7fd8f23bb84f7396a6e3b62c5e61c4536522d82
Signed-off-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
This commit is contained in:
Pavankumar Kondeti 2022-02-07 22:24:02 +05:30 • committed by Gerrit - the friendly Code Review server
commit 013be6c7ff
2 changed files with 2 additions and 4 deletions
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4
drivers/usb/dwc3/dwc3-msm.c
View file

@ -3752,10 +3752,8 @@ skip_update:
dwc->maximum_speed, dwc->max_hw_supp_speed,
mdwc->override_usb_speed);
if (mdwc->override_usb_speed &&
mdwc->override_usb_speed <= dwc->maximum_speed) {
mdwc->override_usb_speed <= dwc->maximum_speed)
dwc->maximum_speed = mdwc->override_usb_speed;
dwc->gadget.max_speed = dwc->maximum_speed;
}
dbg_event(0xFF, "speed", dwc->maximum_speed);

2
drivers/usb/dwc3/gadget.c
View file

@ -4431,7 +4431,7 @@ int dwc3_gadget_init(struct dwc3 *dwc)
dev_info(dwc->dev, "changing max_speed on rev %08x\n",
dwc->revision);
dwc->gadget.max_speed = dwc->maximum_speed;
dwc->gadget.max_speed = dwc->max_hw_supp_speed;
/*
* REVISIT: Here we should clear all pending IRQs to be