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usb: host: xhci-plat: prepare operation w/o shared hcd 

This patch prepares xhci-plat for the following scenario
- If either of the root hubs has no ports, then omit shared hcd
- Main hcd can be USB3 if there are no USB2 ports

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220511220450.85367-5-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heiner Kallweit 2022-05-12 01:04:45 +03:00 committed by Greg Kroah-Hartman
parent 0cf1ea040a
commit e0fe986972
1 changed files with 18 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/usb/host/xhci-plat.c
View File

@ -180,7 +180,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
struct device *sysdev, *tmpdev;
struct xhci_hcd *xhci;
struct resource *res;
struct usb_hcd *hcd;
struct usb_hcd *hcd, *usb3_hcd;
int ret;
int irq;
struct xhci_plat_priv *priv = NULL;
@ -327,21 +327,26 @@ static int xhci_plat_probe(struct platform_device *pdev)
if (ret)
goto disable_usb_phy;
xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
dev_name(&pdev->dev), hcd);
if (!xhci->shared_hcd) {
ret = -ENOMEM;
goto dealloc_usb2_hcd;
if (!xhci_has_one_roothub(xhci)) {
xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
dev_name(&pdev->dev), hcd);
if (!xhci->shared_hcd) {
ret = -ENOMEM;
goto dealloc_usb2_hcd;
}
xhci->shared_hcd->tpl_support = hcd->tpl_support;
}
xhci->shared_hcd->tpl_support = hcd->tpl_support;
usb3_hcd = xhci_get_usb3_hcd(xhci);
if (usb3_hcd && HCC_MAX_PSA(xhci->hcc_params) >= 4)
usb3_hcd->can_do_streams = 1;
if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
xhci->shared_hcd->can_do_streams = 1;
ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
if (ret)
goto put_usb3_hcd;
if (xhci->shared_hcd) {
ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
if (ret)
goto put_usb3_hcd;
}
device_enable_async_suspend(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);