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HID: sony: Ignore DS4 dongle reports when no device is connected

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When the DS4 dongle is connected, it always generates HID reports
even when no DS4 is paired to it. This patch adds logic to ignore
HID reports from the dongle if there is no DS4 currently attached.

Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Roderick Colenbrander 2016-12-08 19:09:52 -08:00 committed by Jiri Kosina
parent c70d5f70cc
commit 405182c245
1 changed files with 28 additions and 0 deletions
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28
drivers/hid/hid-sony.c
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@ -1099,8 +1099,11 @@ struct sony_sc {
u8 led_delay_on[MAX_LEDS];
u8 led_delay_off[MAX_LEDS];
u8 led_count;
bool ds4_dongle_connected;
};
static void sony_set_leds(struct sony_sc *sc);
static inline void sony_schedule_work(struct sony_sc *sc)
{
if (!sc->defer_initialization)
@ -1430,6 +1433,31 @@ static int sony_raw_event(struct hid_device *hdev, struct hid_report *report,
return -EILSEQ;
}
}
/*
* In the case of a DS4 USB dongle, bit[2] of byte 31 indicates
* if a DS4 is actually connected (indicated by '0').
* For non-dongle, this bit is always 0 (connected).
*/
if (sc->hdev->vendor == USB_VENDOR_ID_SONY &&
sc->hdev->product == USB_DEVICE_ID_SONY_PS4_CONTROLLER_DONGLE) {
bool connected = (rd[31] & 0x04) ? false : true;
if (!sc->ds4_dongle_connected && connected) {
hid_info(sc->hdev, "DualShock 4 USB dongle: controller connected\n");
sony_set_leds(sc);
sc->ds4_dongle_connected = true;
} else if (sc->ds4_dongle_connected && !connected) {
hid_info(sc->hdev, "DualShock 4 USB dongle: controller disconnected\n");
sc->ds4_dongle_connected = false;
/* Return 0, so hidraw can get the report. */
return 0;
} else if (!sc->ds4_dongle_connected) {
/* Return 0, so hidraw can get the report. */
return 0;
}
}
dualshock4_parse_report(sc, rd, size);
}