target/linux/brcm2708/patches-3.18/0054-hid-Reduce-default-mouse-polling-interval-to-60Hz.patch

   1 From 4c2238bfb5f0345f889d2f22d52601eb76f62eaf 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 054/114] 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 diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
  12 index ca6849a..4671921 100644
  13 --- a/drivers/hid/usbhid/hid-core.c
  14 +++ b/drivers/hid/usbhid/hid-core.c
  15 @@ -49,7 +49,7 @@
  16   * Module parameters.
  17   */
  18
  19 -static unsigned int hid_mousepoll_interval;
  20 +static unsigned int hid_mousepoll_interval = ~0;
  21  module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  22  MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  23
  24 @@ -1079,8 +1079,12 @@ static int usbhid_start(struct hid_device *hid)
  25                 }
  26
  27                 /* Change the polling interval of mice. */
  28 -               if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
  29 -                       interval = hid_mousepoll_interval;
  30 +               if (hid->collection->usage == HID_GD_MOUSE) {
  31 +                               if (hid_mousepoll_interval == ~0 && interval < 16)
  32 +                                               interval = 16;
  33 +                               else if (hid_mousepoll_interval != ~0 && hid_mousepoll_interval != 0)
  34 +                                               interval = hid_mousepoll_interval;
  35 +               }
  36
  37                 ret = -ENOMEM;
  38                 if (usb_endpoint_dir_in(endpoint)) {
  39 --
  40 1.8.3.2
  41