diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/820-usb-0013-MLK-9785-1-usb-host-ehci-hcd-enable-park-mode.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/820-usb-0013-MLK-9785-1-usb-host-ehci-hcd-enable-park-mode.patch | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/820-usb-0013-MLK-9785-1-usb-host-ehci-hcd-enable-park-mode.patch b/target/linux/layerscape/patches-5.4/820-usb-0013-MLK-9785-1-usb-host-ehci-hcd-enable-park-mode.patch new file mode 100644 index 0000000000..b07c68031c --- /dev/null +++ b/target/linux/layerscape/patches-5.4/820-usb-0013-MLK-9785-1-usb-host-ehci-hcd-enable-park-mode.patch @@ -0,0 +1,38 @@ +From df4f2de9834b02c58bc59cbd6c148db03fcbaba5 Mon Sep 17 00:00:00 2001 +From: Peter Chen <peter.chen@freescale.com> +Date: Tue, 4 Nov 2014 20:46:15 +0800 +Subject: [PATCH] MLK-9785-1 usb: host: ehci-hcd: enable park mode + +Enable park mode will improve the performance a lot at USB ethernet use +case, but a little at USB mass storage use case, and it is not harm from +the tests. Below the performance comparison at imx6sl: + +USB Ethernet (Mbps) + Default Enable Park +TX 192 262 +RX 262 290 + +USB Mass Storage (MB/s) +Read 21.8 22.9 +Write 19.5 22.8 + +This patch is used for freescale internal. + +Signed-off-by: Peter Chen <peter.chen@freescale.com> +(cherry picked from commit b2289a78958859cff37508e4db0314463f33c2e0) +(cherry picked from commit 233f37db41b01b0f827b91422711642228371615) +--- + drivers/usb/host/ehci-hcd.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/usb/host/ehci-hcd.c ++++ b/drivers/usb/host/ehci-hcd.c +@@ -80,7 +80,7 @@ module_param (log2_irq_thresh, int, S_IR + MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes"); + + /* initial park setting: slower than hw default */ +-static unsigned park = 0; ++static unsigned park = 3; + module_param (park, uint, S_IRUGO); + MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); + |