target/linux/brcm2708/patches-4.9/950-0061-hid-Reduce-default-mouse-polling-interval-to-60Hz.patch

   1 From 56f13ae9d518c5aec8736ccc639f2f5e2c3784ad Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Mon, 14 Jul 2014 22:02:09 +0100
   4 Subject: [PATCH] hid: Reduce default mouse polling interval to 60Hz
   5
   6 Reduces overhead when using X
   7 ---
   8  drivers/hid/usbhid/hid-core.c | 10 +++++++---
   9  1 file changed, 7 insertions(+), 3 deletions(-)
  10
  11 --- a/drivers/hid/usbhid/hid-core.c
  12 +++ b/drivers/hid/usbhid/hid-core.c
  13 @@ -49,7 +49,7 @@
  14   * Module parameters.
  15   */
  16
  17 -static unsigned int hid_mousepoll_interval;
  18 +static unsigned int hid_mousepoll_interval = ~0;
  19  module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  20  MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  21
  22 @@ -1093,8 +1093,12 @@ static int usbhid_start(struct hid_devic
  23                 }
  24
  25                 /* Change the polling interval of mice. */
  26 -               if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
  27 -                       interval = hid_mousepoll_interval;
  28 +               if (hid->collection->usage == HID_GD_MOUSE) {
  29 +                               if (hid_mousepoll_interval == ~0 && interval < 16)
  30 +                                               interval = 16;
  31 +                               else if (hid_mousepoll_interval != ~0 && hid_mousepoll_interval != 0)
  32 +                                               interval = hid_mousepoll_interval;
  33 +               }
  34
  35                 ret = -ENOMEM;
  36                 if (usb_endpoint_dir_in(endpoint)) {