e9d92bf1e1
Refreshed all patches. Removed upstreamed: - 203-MIPS-ath79-fix-restart.patch - 0013-MIPS-ath79-fix-system-restart.patch - 180-earlycon-initialize-port-uartclk-based-on-clock-frequency-property.patch - 181-earlycon-remove-hardcoded-port-uartclk-initialization-in-of_setup_earlycon. patch - 700-1-6-e1000e-Remove-Other-from-EIAC.patch - 700-2-6-Partial-revert-e1000e-Avoid-receiver-overrun-interrupt-bursts.patch - 700-3-6-e1000e-Fix-queue-interrupt-re-raising-in-Other-interrupt.patch - 700-4-6-e1000e-Avoid-missed-interrupts-following-ICR-read.patch Compile-tested on: cns3xxx, imx6 Runtime-tested on: cns3xxx, imx6 Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
138 lines
5.4 KiB
Diff
138 lines
5.4 KiB
Diff
From c5c72d252dc8e417388386d5767ea790ee8f5b44 Mon Sep 17 00:00:00 2001
|
|
From: Adam Wallis <awallis@codeaurora.org>
|
|
Date: Fri, 8 Dec 2017 17:59:13 +0200
|
|
Subject: [PATCH 191/224] usb: xhci: allow imod-interval to be configurable
|
|
|
|
The xHCI driver currently has the IMOD set to 160, which
|
|
translates to an IMOD interval of 40,000ns (160 * 250)ns
|
|
|
|
Commit 0cbd4b34cda9 ("xhci: mediatek: support MTK xHCI host controller")
|
|
introduced a QUIRK for the MTK platform to adjust this interval to 20,
|
|
which translates to an IMOD interval of 5,000ns (20 * 250)ns. This is
|
|
due to the fact that the MTK controller IMOD interval is 8 times
|
|
as much as defined in xHCI spec.
|
|
|
|
Instead of adding more quirk bits for additional platforms, this patch
|
|
introduces the ability for vendors to set the IMOD_INTERVAL as is
|
|
optimal for their platform. By using device_property_read_u32() on
|
|
"imod-interval-ns", the IMOD INTERVAL can be specified in nano seconds.
|
|
If no interval is specified, the default of 40,000ns (IMOD=160) will be
|
|
used.
|
|
|
|
No bounds checking has been implemented due to the fact that a vendor
|
|
may have violated the spec and would need to specify a value outside of
|
|
the max 8,000 IRQs/second limit specified in the xHCI spec.
|
|
|
|
Tested-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
|
|
Reviewed-by: Rob Herring <robh@kernel.org>
|
|
Signed-off-by: Adam Wallis <awallis@codeaurora.org>
|
|
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt | 2 ++
|
|
Documentation/devicetree/bindings/usb/usb-xhci.txt | 1 +
|
|
drivers/usb/host/xhci-mtk.c | 9 +++++++++
|
|
drivers/usb/host/xhci-pci.c | 3 +++
|
|
drivers/usb/host/xhci-plat.c | 5 +++++
|
|
drivers/usb/host/xhci.c | 6 +-----
|
|
drivers/usb/host/xhci.h | 2 ++
|
|
7 files changed, 23 insertions(+), 5 deletions(-)
|
|
|
|
--- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
|
|
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
|
|
@@ -46,6 +46,7 @@ Optional properties:
|
|
- pinctrl-names : a pinctrl state named "default" must be defined
|
|
- pinctrl-0 : pin control group
|
|
See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
|
|
+ - imod-interval-ns: default interrupt moderation interval is 5000ns
|
|
|
|
Example:
|
|
usb30: usb@11270000 {
|
|
@@ -66,6 +67,7 @@ usb30: usb@11270000 {
|
|
usb3-lpm-capable;
|
|
mediatek,syscon-wakeup = <&pericfg>;
|
|
mediatek,wakeup-src = <1>;
|
|
+ imod-interval-ns = <10000>;
|
|
};
|
|
|
|
2nd: dual-role mode with xHCI driver
|
|
--- a/Documentation/devicetree/bindings/usb/usb-xhci.txt
|
|
+++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt
|
|
@@ -29,6 +29,7 @@ Optional properties:
|
|
- clocks: reference to a clock
|
|
- usb3-lpm-capable: determines if platform is USB3 LPM capable
|
|
- quirk-broken-port-ped: set if the controller has broken port disable mechanism
|
|
+ - imod-interval-ns: default interrupt moderation interval is 5000ns
|
|
|
|
Example:
|
|
usb@f0931000 {
|
|
--- a/drivers/usb/host/xhci-mtk.c
|
|
+++ b/drivers/usb/host/xhci-mtk.c
|
|
@@ -629,6 +629,15 @@ static int xhci_mtk_probe(struct platfor
|
|
|
|
xhci = hcd_to_xhci(hcd);
|
|
xhci->main_hcd = hcd;
|
|
+
|
|
+ /*
|
|
+ * imod_interval is the interrupt moderation value in nanoseconds.
|
|
+ * The increment interval is 8 times as much as that defined in
|
|
+ * the xHCI spec on MTK's controller.
|
|
+ */
|
|
+ xhci->imod_interval = 5000;
|
|
+ device_property_read_u32(dev, "imod-interval-ns", &xhci->imod_interval);
|
|
+
|
|
xhci->shared_hcd = usb_create_shared_hcd(driver, dev,
|
|
dev_name(dev), hcd);
|
|
if (!xhci->shared_hcd) {
|
|
--- a/drivers/usb/host/xhci-pci.c
|
|
+++ b/drivers/usb/host/xhci-pci.c
|
|
@@ -266,6 +266,9 @@ static int xhci_pci_setup(struct usb_hcd
|
|
if (!xhci->sbrn)
|
|
pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
|
|
|
|
+ /* imod_interval is the interrupt moderation value in nanoseconds. */
|
|
+ xhci->imod_interval = 40000;
|
|
+
|
|
retval = xhci_gen_setup(hcd, xhci_pci_quirks);
|
|
if (retval)
|
|
return retval;
|
|
--- a/drivers/usb/host/xhci-plat.c
|
|
+++ b/drivers/usb/host/xhci-plat.c
|
|
@@ -269,6 +269,11 @@ static int xhci_plat_probe(struct platfo
|
|
if (device_property_read_bool(&pdev->dev, "quirk-broken-port-ped"))
|
|
xhci->quirks |= XHCI_BROKEN_PORT_PED;
|
|
|
|
+ /* imod_interval is the interrupt moderation value in nanoseconds. */
|
|
+ xhci->imod_interval = 40000;
|
|
+ device_property_read_u32(sysdev, "imod-interval-ns",
|
|
+ &xhci->imod_interval);
|
|
+
|
|
hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);
|
|
if (IS_ERR(hcd->usb_phy)) {
|
|
ret = PTR_ERR(hcd->usb_phy);
|
|
--- a/drivers/usb/host/xhci.c
|
|
+++ b/drivers/usb/host/xhci.c
|
|
@@ -612,11 +612,7 @@ int xhci_run(struct usb_hcd *hcd)
|
|
"// Set the interrupt modulation register");
|
|
temp = readl(&xhci->ir_set->irq_control);
|
|
temp &= ~ER_IRQ_INTERVAL_MASK;
|
|
- /*
|
|
- * the increment interval is 8 times as much as that defined
|
|
- * in xHCI spec on MTK's controller
|
|
- */
|
|
- temp |= (u32) ((xhci->quirks & XHCI_MTK_HOST) ? 20 : 160);
|
|
+ temp |= (xhci->imod_interval / 250) & ER_IRQ_INTERVAL_MASK;
|
|
writel(temp, &xhci->ir_set->irq_control);
|
|
|
|
/* Set the HCD state before we enable the irqs */
|
|
--- a/drivers/usb/host/xhci.h
|
|
+++ b/drivers/usb/host/xhci.h
|
|
@@ -1730,6 +1730,8 @@ struct xhci_hcd {
|
|
u8 max_interrupters;
|
|
u8 max_ports;
|
|
u8 isoc_threshold;
|
|
+ /* imod_interval in ns (I * 250ns) */
|
|
+ u32 imod_interval;
|
|
int event_ring_max;
|
|
/* 4KB min, 128MB max */
|
|
int page_size;
|