From 2ddc8e2d2b5902b376fee51585c8eed72b8836e7 Mon Sep 17 00:00:00 2001 From: Filip Alac Date: Wed, 21 Mar 2018 17:28:25 +0100 Subject: HID: usbhid: extend the polling interval configuration to keyboards For mouse and joystick devices user can change the polling interval via usbhid.mousepoll and usbhid.jspoll. Implement the same thing for keyboards, so user can reduce(or increase) input latency this way. This has been tested with a Cooler Master Devastator with kbpoll=32, resulting in delay between events of 32 ms(values were taken from evtest). Signed-off-by: Filip Alac Signed-off-by: Jiri Kosina --- drivers/hid/usbhid/hid-core.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'drivers/hid/usbhid/hid-core.c') diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index 77c50cdfff97..af0e0d061b15 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -56,6 +56,10 @@ static unsigned int hid_jspoll_interval; module_param_named(jspoll, hid_jspoll_interval, uint, 0644); MODULE_PARM_DESC(jspoll, "Polling interval of joysticks"); +static unsigned int hid_kbpoll_interval; +module_param_named(kbpoll, hid_kbpoll_interval, uint, 0644); +MODULE_PARM_DESC(kbpoll, "Polling interval of keyboards"); + static unsigned int ignoreled; module_param_named(ignoreled, ignoreled, uint, 0644); MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds"); @@ -1094,7 +1098,9 @@ static int usbhid_start(struct hid_device *hid) hid->name, endpoint->bInterval, interval); } - /* Change the polling interval of mice and joysticks. */ + /* Change the polling interval of mice, joysticks + * and keyboards. + */ switch (hid->collection->usage) { case HID_GD_MOUSE: if (hid_mousepoll_interval > 0) @@ -1104,6 +1110,10 @@ static int usbhid_start(struct hid_device *hid) if (hid_jspoll_interval > 0) interval = hid_jspoll_interval; break; + case HID_GD_KEYBOARD: + if (hid_kbpoll_interval > 0) + interval = hid_kbpoll_interval; + break; } ret = -ENOMEM; -- cgit v1.2.3-59-g8ed1b