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HID: sony: Update copyright and add Dualshock 4 rate control note 

Update the copyright notice with the current year and add a note
about values for controlling the Dualshock 4 reporting rate.

Processing reports at the default full rate of 1000hz can be too
demanding for some low-power embedded processors so noting
alternate values for people working with this hardware can be useful.

Thanks to Rostislav Pehlivanov for finding these values.

Signed-off-by: Frank Praznik <frank.praznik@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Frank Praznik 2016-09-22 20:18:10 -04:00 committed by Jiri Kosina
parent 2a24293277
commit c4425c8f26
1 changed files with 12 additions and 1 deletions
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13
drivers/hid/hid-sony.c
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@ -8,7 +8,7 @@
* Copyright (c) 2012 David Dillow <dave@thedillows.org>
* Copyright (c) 2006-2013 Jiri Kosina
* Copyright (c) 2013 Colin Leitner <colin.leitner@gmail.com>
* Copyright (c) 2014 Frank Praznik <frank.praznik@gmail.com>
* Copyright (c) 2014-2016 Frank Praznik <frank.praznik@gmail.com>
*/
/*
@ -1879,6 +1879,17 @@ static void dualshock4_send_output_report(struct sony_sc *sc)
u8 *buf = sc->output_report_dmabuf;
int offset;
/*
* NOTE: The buf[1] field of the Bluetooth report controls
* the Dualshock 4 reporting rate.
*
* Known values include:
*
* 0x80 - 1000hz (full speed)
* 0xA0 - 31hz
* 0xB0 - 20hz
* 0xD0 - 66hz
*/
if (sc->quirks & DUALSHOCK4_CONTROLLER_USB) {
memset(buf, 0, DS4_REPORT_0x05_SIZE);
buf[0] = 0x05;