Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid

Pull HID updates from Jiri Kosina:

 - support for "Unified Battery" feature on Logitech devices from Filipe
   Laíns

 - power management improvements for intel-ish driver from Zhang Lixu

 - support for Goodix devices from Douglas Anderson

 - improved handling of generic HID keyboard in order to make it easier
   for userspace to figure out the details of the device, from Dmitry
   Torokhov

 - Playstation DualSense support from Roderick Colenbrander

 - other assorted small fixes and device ID additions.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: (49 commits)
  HID: playstation: add DualSense player LED support.
  HID: playstation: add microphone mute support for DualSense.
  HID: playstation: add initial DualSense lightbar support.
  HID: wacom: Ignore attempts to overwrite the touch_max value from HID
  HID: playstation: fix array size comparison (off-by-one)
  HID: playstation: fix unused variable in ps_battery_get_property.
  HID: playstation: report DualSense hardware and firmware version.
  HID: playstation: add DualSense classic rumble support.
  HID: playstation: add DualSense Bluetooth support.
  HID: playstation: track devices in list.
  HID: playstation: add DualSense accelerometer and gyroscope support.
  HID: playstation: add DualSense touchpad support.
  HID: playstation: add DualSense battery support.
  HID: playstation: use DualSense MAC address as unique identifier.
  HID: playstation: initial DualSense USB support.
  HID: ite: Enable QUIRK_TOUCHPAD_ON_OFF_REPORT on Acer Aspire Switch 10E
  HID: Ignore battery for Elan touchscreen on HP Spectre X360 15-df0xxx
  HID: logitech-dj: add support for the new lightspeed connection iteration
  HID: intel-ish-hid: ipc: Add Tiger Lake H PCI device ID
  HID: logitech-dj: add support for keyboard events in eQUAD step 4 Gaming
  ...

1 files changed, 66 insertions, 19 deletions

diff --git a/drivers/hid/hid-google-hammer.c b/drivers/hid/hid-google-hammer.c
index 85a054f1ce38..d9319622da44 100644
--- a/drivers/hid/hid-google-hammer.c
+++ b/drivers/hid/hid-google-hammer.c
@@ -392,30 +392,34 @@ static int hammer_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 	return 0;
 }
 
-static int hammer_event(struct hid_device *hid, struct hid_field *field,
-			struct hid_usage *usage, __s32 value)
+static void hammer_folded_event(struct hid_device *hdev, bool folded)
 {
 	unsigned long flags;
 
-	if (usage->hid == HID_USAGE_KBD_FOLDED) {
-		spin_lock_irqsave(&cbas_ec_lock, flags);
+	spin_lock_irqsave(&cbas_ec_lock, flags);
 
-		/*
-		 * If we are getting events from Whiskers that means that it
-		 * is attached to the lid.
-		 */
-		cbas_ec.base_present = true;
-		cbas_ec.base_folded = value;
-		hid_dbg(hid, "%s: base: %d, folded: %d\n", __func__,
-			cbas_ec.base_present, cbas_ec.base_folded);
-
-		if (cbas_ec.input) {
-			input_report_switch(cbas_ec.input,
-					    SW_TABLET_MODE, value);
-			input_sync(cbas_ec.input);
-		}
+	/*
+	 * If we are getting events from Whiskers that means that it
+	 * is attached to the lid.
+	 */
+	cbas_ec.base_present = true;
+	cbas_ec.base_folded = folded;
+	hid_dbg(hdev, "%s: base: %d, folded: %d\n", __func__,
+		cbas_ec.base_present, cbas_ec.base_folded);
 
-		spin_unlock_irqrestore(&cbas_ec_lock, flags);
+	if (cbas_ec.input) {
+		input_report_switch(cbas_ec.input, SW_TABLET_MODE, folded);
+		input_sync(cbas_ec.input);
+	}
+
+	spin_unlock_irqrestore(&cbas_ec_lock, flags);
+}
+
+static int hammer_event(struct hid_device *hid, struct hid_field *field,
+			struct hid_usage *usage, __s32 value)
+{
+	if (usage->hid == HID_USAGE_KBD_FOLDED) {
+		hammer_folded_event(hid, value);
 		return 1; /* We handled this event */
 	}
 
@@ -457,6 +461,47 @@ static bool hammer_has_backlight_control(struct hid_device *hdev)
 				HID_GD_KEYBOARD, HID_AD_BRIGHTNESS);
 }
 
+static void hammer_get_folded_state(struct hid_device *hdev)
+{
+	struct hid_report *report;
+	char *buf;
+	int len, rlen;
+	int a;
+
+	report = hdev->report_enum[HID_INPUT_REPORT].report_id_hash[0x0];
+
+	if (!report || report->maxfield < 1)
+		return;
+
+	len = hid_report_len(report) + 1;
+
+	buf = kmalloc(len, GFP_KERNEL);
+	if (!buf)
+		return;
+
+	rlen = hid_hw_raw_request(hdev, report->id, buf, len, report->type, HID_REQ_GET_REPORT);
+
+	if (rlen != len) {
+		hid_warn(hdev, "Unable to read base folded state: %d (expected %d)\n", rlen, len);
+		goto out;
+	}
+
+	for (a = 0; a < report->maxfield; a++) {
+		struct hid_field *field = report->field[a];
+
+		if (field->usage->hid == HID_USAGE_KBD_FOLDED) {
+			u32 value = hid_field_extract(hdev, buf+1,
+					field->report_offset, field->report_size);
+
+			hammer_folded_event(hdev, value);
+			break;
+		}
+	}
+
+out:
+	kfree(buf);
+}
+
 static int hammer_probe(struct hid_device *hdev,
 			const struct hid_device_id *id)
 {
@@ -481,6 +526,8 @@ static int hammer_probe(struct hid_device *hdev,
 		error = hid_hw_open(hdev);
 		if (error)
 			return error;
+
+		hammer_get_folded_state(hdev);
 	}
 
 	if (hammer_has_backlight_control(hdev)) {