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[xhci] Increase link state settling delay to 100ms

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Experimentation shows that the existing 20ms delay is insufficient,
and often results in device detection being deferred until after iPXE
has completed startup.

Fix by increasing the delay to 100ms.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2020-07-03 12:52:05 +01:00
parent e87760183d
commit 0f5d234335
1 changed files with 1 additions and 1 deletions
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2
src/drivers/usb/xhci.h
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@@ -243,7 +243,7 @@ enum xhci_default_psi_value {
#define XHCI_PORTSC_LWS 0x00010000UL
/** Time to delay after writing the port link state */
#define XHCI_LINK_STATE_DELAY_MS 20
#define XHCI_LINK_STATE_DELAY_MS 100
/** Connect status change */
#define XHCI_PORTSC_CSC 0x00020000UL