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HID: hid-steam: Disable watchdog instead of using a heartbeat

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The Steam Deck has a setting that controls whether or not the watchdog is
enabled, so instead of using a heartbeat to keep the watchdog from triggering,
this commit changes the behavior to simply disable the watchdog instead.

Signed-off-by: Jiri Kosina <jkosina@suse.com>
This commit is contained in:
Vicki Pfau 2023-12-19 19:38:32 -08:00 committed by Jiri Kosina
parent 34281b4d91
commit 917972636e
1 changed files with 2 additions and 28 deletions
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30
drivers/hid/hid-steam.c
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@ -101,6 +101,7 @@ static LIST_HEAD(steam_devices);
#define STEAM_REG_GYRO_MODE 0x30
#define STEAM_REG_LPAD_CLICK_PRESSURE 0x34
#define STEAM_REG_RPAD_CLICK_PRESSURE 0x35
#define STEAM_REG_WATCHDOG_ENABLE 0x47
/* Raw event identifiers */
#define STEAM_EV_INPUT_DATA 0x01
@ -134,7 +135,6 @@ struct steam_device {
struct power_supply __rcu *battery;
u8 battery_charge;
u16 voltage;
struct delayed_work heartbeat;
struct work_struct rumble_work;
u16 rumble_left;
u16 rumble_right;
@ -340,8 +340,6 @@ static void steam_set_lizard_mode(struct steam_device *steam, bool enable)
steam_send_report_byte(steam, STEAM_CMD_DEFAULT_MAPPINGS);
/* enable mouse */
steam_send_report_byte(steam, STEAM_CMD_DEFAULT_MOUSE);
cancel_delayed_work_sync(&steam->heartbeat);
} else {
/* disable esc, enter, cursor */
steam_send_report_byte(steam, STEAM_CMD_CLEAR_MAPPINGS);
@ -352,13 +350,8 @@ static void steam_set_lizard_mode(struct steam_device *steam, bool enable)
STEAM_REG_RPAD_MODE, 0x07, /* disable mouse */
STEAM_REG_LPAD_CLICK_PRESSURE, 0xFFFF, /* disable clicky pad */
STEAM_REG_RPAD_CLICK_PRESSURE, 0xFFFF, /* disable clicky pad */
STEAM_REG_WATCHDOG_ENABLE, 0, /* disable watchdog that tests if Steam is active */
0);
/*
* The Steam Deck has a watchdog that automatically enables
* lizard mode if it doesn't see any traffic for too long
*/
if (!work_busy(&steam->heartbeat.work))
schedule_delayed_work(&steam->heartbeat, 5 * HZ);
} else {
steam_write_registers(steam,
STEAM_REG_LPAD_MODE, 0x07, /* disable mouse */
@ -733,22 +726,6 @@ static bool steam_is_valve_interface(struct hid_device *hdev)
return !list_empty(&rep_enum->report_list);
}
static void steam_lizard_mode_heartbeat(struct work_struct *work)
{
struct steam_device *steam = container_of(work, struct steam_device,
heartbeat.work);
mutex_lock(&steam->mutex);
if (!steam->client_opened && steam->client_hdev) {
steam_send_report_byte(steam, STEAM_CMD_CLEAR_MAPPINGS);
steam_write_registers(steam,
STEAM_REG_RPAD_MODE, 0x07, /* disable mouse */
0);
schedule_delayed_work(&steam->heartbeat, 5 * HZ);
}
mutex_unlock(&steam->mutex);
}
static int steam_client_ll_parse(struct hid_device *hdev)
{
struct steam_device *steam = hdev->driver_data;
@ -887,7 +864,6 @@ static int steam_probe(struct hid_device *hdev,
steam->quirks = id->driver_data;
INIT_WORK(&steam->work_connect, steam_work_connect_cb);
INIT_LIST_HEAD(&steam->list);
INIT_DEFERRABLE_WORK(&steam->heartbeat, steam_lizard_mode_heartbeat);
INIT_WORK(&steam->rumble_work, steam_haptic_rumble_cb);
steam->client_hdev = steam_create_client_hid(hdev);
@ -944,7 +920,6 @@ hid_hw_start_fail:
hid_destroy_device(steam->client_hdev);
client_hdev_fail:
cancel_work_sync(&steam->work_connect);
cancel_delayed_work_sync(&steam->heartbeat);
cancel_work_sync(&steam->rumble_work);
steam_alloc_fail:
hid_err(hdev, "%s: failed with error %d\n",
@ -965,7 +940,6 @@ static void steam_remove(struct hid_device *hdev)
mutex_lock(&steam->mutex);
steam->client_hdev = NULL;
steam->client_opened = false;
cancel_delayed_work_sync(&steam->heartbeat);
mutex_unlock(&steam->mutex);
cancel_work_sync(&steam->work_connect);
if (steam->quirks & STEAM_QUIRK_WIRELESS) {