linux-kernel - [PATCH v3 4/7] Input: elantech

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Message-Id: <1314320591-11551-5-git-send-email-jj_ding@emc.com.tw>
Date:	Fri, 26 Aug 2011 09:03:08 +0800
From:	JJ Ding <jj_ding@....com.tw>
To:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Seth Forshee <seth.forshee@...onical.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Aaron Huang <aaron_huang@....com.tw>,
	Tom Lin <tom_lin@....com.tw>,
	Éric Piel <E.A.B.Piel@...elft.nl>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Chase Douglas <chase.douglas@...onical.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	Alessandro Rubini <rubini@...l.unipv.it>,
	JJ Ding <jj_ding@....com.tw>
Subject: [PATCH v3 4/7] 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@...mplin-utc.net>
Acked-by: Daniel Kurtz <djkurtz@...omium.org>
Signed-off-by: JJ Ding <jj_ding@....com.tw>
---
 drivers/input/mouse/elantech.h |   15 ++++++---------
 1 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index b54ea27..d9e6144 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
-- 
1.7.4.1

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