Merge branch 'master' into for-4.20/upstream-fixes

Pull in a merge commit that brought in 3b692c55e5 ("HID: asus: only
support backlight when it's not driven by WMI") so that fixup could be
applied on top of it.

drivers/hid/Kconfig

@@ -149,6 +149,7 @@ config HID_APPLEIR
 config HID_ASUS
 	tristate "Asus"
 	depends on LEDS_CLASS
+	depends on ASUS_WMI || ASUS_WMI=n
 	---help---
 	Support for Asus notebook built-in keyboard and touchpad via i2c, and
 	the Asus Republic of Gamers laptop keyboard special keys.
@@ -188,7 +189,6 @@ config HID_BIGBEN_FF
 	depends on NEW_LEDS
 	depends on LEDS_CLASS
 	select INPUT_FF_MEMLESS
-	default !EXPERT
 	help
 	  Support for the "Kid-friendly Wired Controller" PS3OFMINIPAD
 	  gamepad made by BigBen Interactive, originally sold as a PS3

drivers/hid/hid-asus.c

@@ -29,6 +29,7 @@
 #include <linux/dmi.h>
 #include <linux/hid.h>
 #include <linux/module.h>
+#include <linux/platform_data/x86/asus-wmi.h>
 #include <linux/input/mt.h>
 #include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
 
@@ -349,6 +350,24 @@ static void asus_kbd_backlight_work(struct work_struct *work)
 		hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
 }
 
+/* WMI-based keyboard backlight LED control (via asus-wmi driver) takes
+ * precedence. We only activate HID-based backlight control when the
+ * WMI control is not available.
+ */
+static bool asus_kbd_wmi_led_control_present(struct hid_device *hdev)
+{
+	u32 value;
+	int ret;
+
+	ret = asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2,
+				       ASUS_WMI_DEVID_KBD_BACKLIGHT, 0, &value);
+	hid_dbg(hdev, "WMI backlight check: rc %d value %x", ret, value);
+	if (ret)
+		return false;
+
+	return !!(value & ASUS_WMI_DSTS_PRESENCE_BIT);
+}
+
 static int asus_kbd_register_leds(struct hid_device *hdev)
 {
 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
@@ -436,7 +455,9 @@ static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
 
 	drvdata->input = input;
 
-	if (drvdata->enable_backlight && asus_kbd_register_leds(hdev))
+	if (drvdata->enable_backlight &&
+	    !asus_kbd_wmi_led_control_present(hdev) &&
+	    asus_kbd_register_leds(hdev))
 		hid_warn(hdev, "Failed to initialize backlight.\n");
 
 	return 0;

drivers/hid/hid-input.c

@@ -1855,31 +1855,30 @@ EXPORT_SYMBOL_GPL(hidinput_disconnect);
 void hid_scroll_counter_handle_scroll(struct hid_scroll_counter *counter,
 				      int hi_res_value)
 {
-	int low_res_scroll_amount;
-	/* Some wheels will rest 7/8ths of a notch from the previous notch
-	 * after slow movement, so we want the threshold for low-res events to
-	 * be in the middle of the notches (e.g. after 4/8ths) as opposed to on
-	 * the notches themselves (8/8ths).
-	 */
-	int threshold = counter->resolution_multiplier / 2;
+	int low_res_value, remainder, multiplier;
 
 	input_report_rel(counter->dev, REL_WHEEL_HI_RES,
 			 hi_res_value * counter->microns_per_hi_res_unit);
 
-	counter->remainder += hi_res_value;
-	if (abs(counter->remainder) >= threshold) {
-		/* Add (or subtract) 1 because we want to trigger when the wheel
-		 * is half-way to the next notch (i.e. scroll 1 notch after a
-		 * 1/2 notch movement, 2 notches after a 1 1/2 notch movement,
-		 * etc.).
-		 */
-		low_res_scroll_amount =
-			counter->remainder / counter->resolution_multiplier
-			+ (hi_res_value > 0 ? 1 : -1);
-		input_report_rel(counter->dev, REL_WHEEL,
-				 low_res_scroll_amount);
-		counter->remainder -=
-			low_res_scroll_amount * counter->resolution_multiplier;
-	}
+	/*
+	 * Update the low-res remainder with the high-res value,
+	 * but reset if the direction has changed.
+	 */
+	remainder = counter->remainder;
+	if ((remainder ^ hi_res_value) < 0)
+		remainder = 0;
+	remainder += hi_res_value;
+
+	/*
+	 * Then just use the resolution multiplier to see if
+	 * we should send a low-res (aka regular wheel) event.
+	 */
+	multiplier = counter->resolution_multiplier;
+	low_res_value = remainder / multiplier;
+	remainder -= low_res_value * multiplier;
+	counter->remainder = remainder;
+
+	if (low_res_value)
+		input_report_rel(counter->dev, REL_WHEEL, low_res_value);
 }
 EXPORT_SYMBOL_GPL(hid_scroll_counter_handle_scroll);

drivers/hid/hid-picolcd_cir.c

@@ -45,7 +45,7 @@ int picolcd_raw_cir(struct picolcd_data *data,
 {
 	unsigned long flags;
 	int i, w, sz;
-	DEFINE_IR_RAW_EVENT(rawir);
+	struct ir_raw_event rawir = {};
 
 	/* ignore if rc_dev is NULL or status is shunned */
 	spin_lock_irqsave(&data->lock, flags);
@@ -67,7 +67,6 @@ int picolcd_raw_cir(struct picolcd_data *data,
 	 */
 	sz = size > 0 ? min((int)raw_data[0], size-1) : 0;
 	for (i = 0; i+1 < sz; i += 2) {
-		init_ir_raw_event(&rawir);
 		w = (raw_data[i] << 8) | (raw_data[i+1]);
 		rawir.pulse = !!(w & 0x8000);
 		rawir.duration = US_TO_NS(rawir.pulse ? (65536 - w) : w);

drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c

@@ -345,7 +345,8 @@ static const struct dmi_system_id i2c_hid_dmi_desc_override_table[] = {
 			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "FlexBook edge11 - M-FBE11"),
 		},
 		.driver_data = (void *)&sipodev_desc
-	}
+	},
+	{ }	/* Terminate list */
 };