mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 18:41:23 +00:00
usb: dwc3: Workaround for irq mask issue
This is a workaround for STAR 9000961433 which affects only version 3.00a of the DWC_usb3 core. This prevents the controller interrupt from being masked while handling events. Enabling interrupt moderation allows us to work around this issue because once the GEVNTCOUNT.count is written the IRQ is immediately deasserted and won't be asserted again until GEVNTCOUNT.EHB is cleared. Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
parent
cf40b86b6e
commit
28632b44d1
@ -1004,6 +1004,17 @@ static void dwc3_check_params(struct dwc3 *dwc)
|
||||
dwc->imod_interval = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Workaround for STAR 9000961433 which affects only version
|
||||
* 3.00a of the DWC_usb3 core. This prevents the controller
|
||||
* interrupt from being masked while handling events. IMOD
|
||||
* allows us to work around this issue. Enable it for the
|
||||
* affected version.
|
||||
*/
|
||||
if (!dwc->imod_interval &&
|
||||
(dwc->revision == DWC3_REVISION_300A))
|
||||
dwc->imod_interval = 1;
|
||||
|
||||
/* Check the maximum_speed parameter */
|
||||
switch (dwc->maximum_speed) {
|
||||
case USB_SPEED_LOW:
|
||||
|
Loading…
Reference in New Issue
Block a user