From 5b01b3b8b122fde7fbe116803f7863667b4c5beb Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Fri, 3 Nov 2017 18:29:47 +0100
Subject: [PATCH] HID: Wacom: switch Dell canvas into highres mode
Git-commit: 5b01b3b8b122fde7fbe116803f7863667b4c5beb
Patch-mainline: v4.15-rc1
References: bsc#1051510

The Dell Canvas exports 2 collections for the Pen part. The only
difference between the 2 is that the default one has half the resolution
of the second one.

The Windows driver switches the tablet into the second mode, so we should
behave the same.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/hid/wacom_sys.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index 735bfbbcaa82..ab3178bef0b6 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -196,6 +196,13 @@ static void wacom_feature_mapping(struct hid_device *hdev,
 		kfree(data);
 		break;
 	}
+
+	if (hdev->vendor == USB_VENDOR_ID_WACOM &&
+	    hdev->product == 0x4200 /* Dell Canvas 27 */ &&
+	    field->application == HID_UP_MSVENDOR) {
+		wacom->wacom_wac.mode_report = field->report->id;
+		wacom->wacom_wac.mode_value = 2;
+	}
 }
 
 /*
-- 
2.16.4