The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x d9b0328d0b8b8298dfdc97cd8e0e2371d4bcc97b # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023072124-grafted-footwork-b47b@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..
Possible dependencies:
d9b0328d0b8b ("xhci: Show ZHAOXIN xHCI root hub speed correctly") 2a865a652299 ("xhci: Fix TRB prefetch issue of ZHAOXIN hosts") f927728186f0 ("xhci: Fix resume issue of some ZHAOXIN hosts") a611bf473d1f ("xhci-pci: Set runtime PM as default policy on all xHC 1.2 or later devices") 34cd2db408d5 ("xhci: Add quirk to reset host back to default state at shutdown") a956f91247da ("Merge 6.0-rc4 into usb-next")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From d9b0328d0b8b8298dfdc97cd8e0e2371d4bcc97b Mon Sep 17 00:00:00 2001 From: Weitao Wang WeitaoWang-oc@zhaoxin.com Date: Fri, 2 Jun 2023 17:40:08 +0300 Subject: [PATCH] xhci: Show ZHAOXIN xHCI root hub speed correctly
Some ZHAOXIN xHCI controllers follow usb3.1 spec, but only support gen1 speed 5Gbps. While in Linux kernel, if xHCI suspport usb3.1, root hub speed will show on 10Gbps. To fix this issue of ZHAOXIN xHCI platforms, read usb speed ID supported by xHCI to determine root hub speed. And add a quirk XHCI_ZHAOXIN_HOST for this issue.
[fix warning about uninitialized symbol -Mathias]
Suggested-by: Mathias Nyman mathias.nyman@linux.intel.com Cc: stable@vger.kernel.org Signed-off-by: Weitao Wang WeitaoWang-oc@zhaoxin.com Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Message-ID: 20230602144009.1225632-11-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index c4170421bc9c..19a402123de0 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1961,7 +1961,7 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, { u32 temp, port_offset, port_count; int i; - u8 major_revision, minor_revision; + u8 major_revision, minor_revision, tmp_minor_revision; struct xhci_hub *rhub; struct device *dev = xhci_to_hcd(xhci)->self.sysdev; struct xhci_port_cap *port_cap; @@ -1981,6 +1981,15 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, */ if (minor_revision > 0x00 && minor_revision < 0x10) minor_revision <<= 4; + /* + * Some zhaoxin's xHCI controller that follow usb3.1 spec + * but only support Gen1. + */ + if (xhci->quirks & XHCI_ZHAOXIN_HOST) { + tmp_minor_revision = minor_revision; + minor_revision = 0; + } + } else if (major_revision <= 0x02) { rhub = &xhci->usb2_rhub; } else { @@ -1989,10 +1998,6 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, /* Ignoring port protocol we can't understand. FIXME */ return; } - rhub->maj_rev = XHCI_EXT_PORT_MAJOR(temp); - - if (rhub->min_rev < minor_revision) - rhub->min_rev = minor_revision;
/* Port offset and count in the third dword, see section 7.2 */ temp = readl(addr + 2); @@ -2010,8 +2015,6 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, if (xhci->num_port_caps > max_caps) return;
- port_cap->maj_rev = major_revision; - port_cap->min_rev = minor_revision; port_cap->psi_count = XHCI_EXT_PORT_PSIC(temp);
if (port_cap->psi_count) { @@ -2032,6 +2035,11 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, XHCI_EXT_PORT_PSIV(port_cap->psi[i - 1]))) port_cap->psi_uid_count++;
+ if (xhci->quirks & XHCI_ZHAOXIN_HOST && + major_revision == 0x03 && + XHCI_EXT_PORT_PSIV(port_cap->psi[i]) >= 5) + minor_revision = tmp_minor_revision; + xhci_dbg(xhci, "PSIV:%d PSIE:%d PLT:%d PFD:%d LP:%d PSIM:%d\n", XHCI_EXT_PORT_PSIV(port_cap->psi[i]), XHCI_EXT_PORT_PSIE(port_cap->psi[i]), @@ -2041,6 +2049,15 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, XHCI_EXT_PORT_PSIM(port_cap->psi[i])); } } + + rhub->maj_rev = major_revision; + + if (rhub->min_rev < minor_revision) + rhub->min_rev = minor_revision; + + port_cap->maj_rev = major_revision; + port_cap->min_rev = minor_revision; + /* cache usb2 port capabilities */ if (major_revision < 0x03 && xhci->num_ext_caps < max_caps) xhci->ext_caps[xhci->num_ext_caps++] = temp; diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 3aad946bab68..88c16d91fb69 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -522,6 +522,8 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) xhci->quirks |= XHCI_NO_SOFT_RETRY;
if (pdev->vendor == PCI_VENDOR_ID_ZHAOXIN) { + xhci->quirks |= XHCI_ZHAOXIN_HOST; + if (pdev->device == 0x9202) { xhci->quirks |= XHCI_RESET_ON_RESUME; xhci->quirks |= XHCI_ZHAOXIN_TRB_FETCH; diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 5a495126c8ba..7e282b4522c0 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1905,6 +1905,7 @@ struct xhci_hcd { #define XHCI_SUSPEND_RESUME_CLKS BIT_ULL(43) #define XHCI_RESET_TO_DEFAULT BIT_ULL(44) #define XHCI_ZHAOXIN_TRB_FETCH BIT_ULL(45) +#define XHCI_ZHAOXIN_HOST BIT_ULL(46)
unsigned int num_active_eps; unsigned int limit_active_eps;