HID: hid-steam: Avoid overwriting smoothing parameter

The original implementation of this driver incorrectly guessed the function of
this register. It's not only unnecessary to write to this register for lizard
mode but actually counter-productive since it overwrites whatever previous
value was intentionally set, for example by Steam.

Signed-off-by: Vicki Pfau <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

Author: endrift

drivers/hid/hid-steam.c

@@ -340,9 +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);
-		steam_write_registers(steam,
-			STEAM_REG_RPAD_MARGIN, 0x01, /* enable margin */
-			0);
 
 		cancel_delayed_work_sync(&steam->heartbeat);
 	} else {
@@ -351,7 +348,6 @@ static void steam_set_lizard_mode(struct steam_device *steam, bool enable)
 
 		if (steam->quirks & STEAM_QUIRK_DECK) {
 			steam_write_registers(steam,
-				STEAM_REG_RPAD_MARGIN, 0x00, /* disable margin */
 				STEAM_REG_LPAD_MODE, 0x07, /* disable mouse */
 				STEAM_REG_RPAD_MODE, 0x07, /* disable mouse */
 				STEAM_REG_LPAD_CLICK_PRESSURE, 0xFFFF, /* disable clicky pad */
@@ -365,7 +361,6 @@ static void steam_set_lizard_mode(struct steam_device *steam, bool enable)
 				schedule_delayed_work(&steam->heartbeat, 5 * HZ);
 		} else {
 			steam_write_registers(steam,
-				STEAM_REG_RPAD_MARGIN, 0x00, /* disable margin */
 				STEAM_REG_LPAD_MODE, 0x07, /* disable mouse */
 				STEAM_REG_RPAD_MODE, 0x07, /* disable mouse */
 				0);