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On Fri, 28 Oct 2011, Anton Alekseev wrote:
> Hello.
>
> I've got ATI EHCI :(
>
> All logs are in attachments.
>
> I've also added logs from laptop with INTEL EHCI attachments (names
> containing *INTEL*) where everything works just fine, as you wrote in last
> message.
You didn't have to send 12 different logs! All I asked for was the
output from "lspci -n".
Anyway, here's a patch which will activate the broken-periodic
workaround on your ATI system. Let's see how well it works.
Alan Stern
Index: usb-3.1/drivers/usb/host/ehci-pci.c
===================================================================
--- usb-3.1.orig/drivers/usb/host/ehci-pci.c
+++ usb-3.1/drivers/usb/host/ehci-pci.c
@@ -119,6 +119,18 @@ static int ehci_pci_setup(struct usb_hcd
"dummy qh workaround\n");
}
+ /*
+ * Some controllers refuse to turn off the periodic schedule if it
+ * hasn't been on for long enough. The workaround simply delays until
+ * the schedule has been on for at least 1 ms.
+ */
+ if ((pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x27cc) ||
+ (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x4396)) {
+ ehci->broken_periodic = 1;
+ ehci_info(ehci, "using broken periodic workaround\n");
+ }
+
+
/* data structure init */
retval = ehci_init(hcd);
if (retval)
@@ -131,10 +143,6 @@ static int ehci_pci_setup(struct usb_hcd
case PCI_VENDOR_ID_INTEL:
ehci->need_io_watchdog = 0;
ehci->fs_i_thresh = 1;
- if (pdev->device == 0x27cc) {
- ehci->broken_periodic = 1;
- ehci_info(ehci, "using broken periodic workaround\n");
- }
if (pdev->device == 0x0806 || pdev->device == 0x0811
|| pdev->device == 0x0829) {
ehci_info(ehci, "disable lpm for langwell/penwell\n");
--
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