commit d6821a11bb6d664283ae96030044270ad68eaed0
author Ethan Yonker <dees_troy@teamw.in> Wed Aug 26 15:29:23 2015 -0500
committer Dees Troy <dees_troy@teamw.in> Wed Aug 26 22:36:34 2015 +0200
tree 2554f2f48d59945189b7c45e23373217c4a16d5a
parent 89583ef00f54369be2b5ab3495495616056eba13

Add TW_IGNORE_ABS_MT_TRACKING_ID

Fixes touch on Oppo R7 Plus

Oppo R7 Plus, when recovery is flashed and booted from the actual
recovery partition, the digitizer sends some extra touch data for
up to 10 different touch slots even if no actual touch is present
for those slots (ABS_MT_SLOT). This patch allows TWRP to handle
touch data properly for this device and maybe others.

Change-Id: I8f9171b605566788b674b3d4d96bd9f2f65736c2

minuitwrp/Android.mk

diff --git a/minuitwrp/Android.mk b/minuitwrp/Android.mk
index 188de9d..76b4024 100644
--- a/minuitwrp/Android.mk
+++ b/minuitwrp/Android.mk
@@ -97,6 +97,10 @@
 LOCAL_CFLAGS += -DTW_IGNORE_MT_POSITION_0
 endif
 
+ifeq ($(TW_IGNORE_ABS_MT_TRACKING_ID), true)
+LOCAL_CFLAGS += -DTW_IGNORE_ABS_MT_TRACKING_ID
+endif
+
 ifneq ($(TW_INPUT_BLACKLIST),)
   LOCAL_CFLAGS += -DTW_INPUT_BLACKLIST=$(TW_INPUT_BLACKLIST)
 endif

minuitwrp/events.c

diff --git a/minuitwrp/events.c b/minuitwrp/events.c
index 5df5338..1d2af6b 100644
--- a/minuitwrp/events.c
+++ b/minuitwrp/events.c
@@ -545,6 +545,12 @@
             break;
 
         case ABS_MT_TRACKING_ID: //39
+#ifdef TW_IGNORE_ABS_MT_TRACKING_ID
+#ifdef _EVENT_LOGGING
+            printf("EV: %s => EV_ABS ABS_MT_TRACKING_ID %d ignored\n", e->deviceName, ev->value);
+#endif
+            return 1;
+#endif
             if (ev->value < 0) {
                 e->mt_p.x = 0;
                 e->mt_p.y = 0;
@@ -581,6 +587,10 @@
             printf("EV: %s => EV_ABS ABS_MT_DISTANCE %d\n", e->deviceName, ev->value);
 			return 1;
             break;
+        case ABS_MT_SLOT:
+            printf("EV: %s => ABS_MT_SLOT %d\n", e->deviceName, ev->value);
+			return 1;
+			break;
 #endif
 
         default: