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| author | Frank Praznik <frank.praznik@gmail.com> | 2016-09-22 20:18:10 -0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2016-09-26 15:32:48 +0200 |
| commit | c4425c8f26aad2b49c5959fad277c9d109fb8ca3 (patch) | |
| tree | 849a14590c10d05fd3adaf4bbf47c6d639121994 /drivers/hid/hid-sony.c | |
| parent | 2a2429327711558aa23fd73d770b6fd5e0d10de7 (diff) | |
| download | lwn-c4425c8f26aad2b49c5959fad277c9d109fb8ca3.tar.gz lwn-c4425c8f26aad2b49c5959fad277c9d109fb8ca3.zip | |
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>
Diffstat (limited to 'drivers/hid/hid-sony.c')
| -rw-r--r-- | drivers/hid/hid-sony.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c index 9b96f9570531..9bf4e3637ba2 100644 --- a/drivers/hid/hid-sony.c +++ b/drivers/hid/hid-sony.c @@ -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; |