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Commit e8b33e61 authored by qctecmdr Service's avatar qctecmdr Service Committed by Gerrit - the friendly Code Review server
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Merge "usb: dwc3: Increase the inter packet gap for USB 2.0"

parents ae4ba207 d47d99a3

drivers/usb/dwc3/core.c

+7 −0
Original line number Diff line number Diff line
@@ -933,6 +933,13 @@ int dwc3_core_init(struct dwc3 *dwc) 
		dwc3_writel(dwc->regs, DWC3_GUCTL2, reg);

	}



	/* set inter-packet gap 199.794ns to improve EL_23 margin */

	if (dwc->revision >= DWC3_USB31_REVISION_170A) {

		reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);

		reg |= DWC3_GUCTL1_IP_GAP_ADD_ON(1);

		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);

	}



	return 0;



err3:

drivers/usb/dwc3/core.h

+1 −0
Original line number Diff line number Diff line
@@ -221,6 +221,7 @@ 
/* Global User Control 1 Register */

#define DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS	BIT(28)

#define DWC3_GUCTL1_DEV_L1_EXIT_BY_HW	BIT(24)

#define DWC3_GUCTL1_IP_GAP_ADD_ON(n)	(n << 21)



/* Global Debug LTSSM Register */

#define DWC3_GDBGLTSSM_LINKSTATE_MASK	(0xF << 22)