This is a note to let you know that I've just added the patch titled
usb: dwc3: pci: ID for Tiger Lake CPU
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-dwc3-pci-id-for-tiger-lake-cpu.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 342b88e45896b874876d56581839f4ebb3ae1cfe
Author: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Date: Fri Jan 15 12:49:13 2021 +0300
usb: dwc3: pci: ID for Tiger Lake CPU
[ Upstream commit 73203bde3a95a48f27b2454dc6b955280c641afe ]
Tiger Lake SOC (the versions of it that have integrated USB4
controller) may have two DWC3 controllers. One is part of
the PCH (Platform Controller Hub, i.e. the chipset) as
usual, and the other is inside the actual CPU block.
On all Intel platforms that have the two separate DWC3
controllers, the one inside the CPU handles USB3 and only
USB3 traffic, while the PCH version handles USB2 and USB2
alone. The reason for splitting the two busses like this is
to allow easy USB3 tunneling over USB4 connections. As USB2
is not tunneled over USB4, it has dedicated USB controllers
(both xHCI and DWC3).
Acked-by: Felipe Balbi <balbi@xxxxxxxxxx>
Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210115094914.88401-4-heikki.krogerus@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Stable-dep-of: 8e5248c3a877 ("usb: dwc3: pci: add support for the Intel Meteor Lake-M")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index a4439ea3cebaf..a1b135153137a 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -41,6 +41,7 @@
#define PCI_DEVICE_ID_INTEL_TGPH 0x43ee
#define PCI_DEVICE_ID_INTEL_JSP 0x4dee
#define PCI_DEVICE_ID_INTEL_ADLS 0x7ae1
+#define PCI_DEVICE_ID_INTEL_TGL 0x9a15
#define PCI_INTEL_BXT_DSM_GUID "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
#define PCI_INTEL_BXT_FUNC_PMU_PWR 4
@@ -385,6 +386,9 @@ static const struct pci_device_id dwc3_pci_id_table[] = {
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ADLS),
(kernel_ulong_t) &dwc3_pci_intel_swnode, },
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGL),
+ (kernel_ulong_t) &dwc3_pci_intel_swnode, },
+
{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_NL_USB),
(kernel_ulong_t) &dwc3_pci_amd_swnode, },
{ } /* Terminating Entry */
