It appears some keyboards from vendor 'QTEC' will not work properly until suspend & resume. Empirically narrowed down to solution of re-sending power on command _after_ initialization was completed before the end of initial probing. Signed-off-by: Aleksandrs Vinarskis <alex.vinarskis@xxxxxxxxx> --- drivers/hid/i2c-hid/i2c-hid-core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c index 632eaf9e11a6..087ca2474176 100644 --- a/drivers/hid/i2c-hid/i2c-hid-core.c +++ b/drivers/hid/i2c-hid/i2c-hid-core.c @@ -50,6 +50,7 @@ #define I2C_HID_QUIRK_BAD_INPUT_SIZE BIT(3) #define I2C_HID_QUIRK_NO_WAKEUP_AFTER_RESET BIT(4) #define I2C_HID_QUIRK_NO_SLEEP_ON_SUSPEND BIT(5) +#define I2C_HID_QUIRK_RE_POWER_ON BIT(6) /* Command opcodes */ #define I2C_HID_OPCODE_RESET 0x01 @@ -1048,7 +1049,11 @@ static int i2c_hid_core_register_hid(struct i2c_hid *ihid) return ret; } - return 0; + /* At least some QTEC devices need this after initialization */ + if (ihid->quirks & I2C_HID_QUIRK_RE_POWER_ON) + ret = i2c_hid_set_power(ihid, I2C_HID_PWR_ON); + + return ret; } static int i2c_hid_core_probe_panel_follower(struct i2c_hid *ihid) -- 2.43.0
