mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-26 17:01:14 +00:00
39 lines
1.3 KiB
Diff
39 lines
1.3 KiB
Diff
|
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");
|
||
|
|
|