Input: elantech - remove ETP_EDGE_FUZZ_V2

Don't try to be too clever and remove ETP_EDGE_FUZZ_V2. X, Y ranges
should be just the raw resolution of the device. Otherwise, they can
cause underflow on the Y axis.

Suggested-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: JJ Ding <jj_ding@emc.com.tw>
Acked-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 6 insertions, 9 deletions

diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index b54ea27d10af..d9e614409f92 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -66,16 +66,13 @@
 #define ETP_YMAX_V1                     (384 - ETP_EDGE_FUZZ_V1)
 
 /*
- * It seems the resolution for hardware version 2 doubled.
- * Hence the X and Y ranges are doubled too.
- * The bezel around the pad also appears to be smaller
+ * The resolution for older v2 hardware doubled.
+ * (newer v2's firmware provides command so we can query)
  */
-#define ETP_EDGE_FUZZ_V2                8
-
-#define ETP_XMIN_V2                     (   0 + ETP_EDGE_FUZZ_V2)
-#define ETP_XMAX_V2                     (1152 - ETP_EDGE_FUZZ_V2)
-#define ETP_YMIN_V2                     (   0 + ETP_EDGE_FUZZ_V2)
-#define ETP_YMAX_V2                     ( 768 - ETP_EDGE_FUZZ_V2)
+#define ETP_XMIN_V2                     0
+#define ETP_XMAX_V2                     1152
+#define ETP_YMIN_V2                     0
+#define ETP_YMAX_V2                     768
 
 #define ETP_PMIN_V2                     0
 #define ETP_PMAX_V2                     255