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path: root/drivers/input/input.c
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Diffstat (limited to 'drivers/input/input.c')
-rw-r--r--drivers/input/input.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 935a1835de2..e54e002665b 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -29,6 +29,23 @@ MODULE_LICENSE("GPL");
#define INPUT_DEVICES 256
+/*
+ * EV_ABS events which should not be cached are listed here.
+ */
+static unsigned int input_abs_bypass_init_data[] __initdata = {
+ ABS_MT_TOUCH_MAJOR,
+ ABS_MT_TOUCH_MINOR,
+ ABS_MT_WIDTH_MAJOR,
+ ABS_MT_WIDTH_MINOR,
+ ABS_MT_ORIENTATION,
+ ABS_MT_POSITION_X,
+ ABS_MT_POSITION_Y,
+ ABS_MT_TOOL_TYPE,
+ ABS_MT_BLOB_ID,
+ 0
+};
+static unsigned long input_abs_bypass[BITS_TO_LONGS(ABS_CNT)];
+
static LIST_HEAD(input_dev_list);
static LIST_HEAD(input_handler_list);
@@ -161,6 +178,10 @@ static void input_handle_event(struct input_dev *dev,
disposition = INPUT_PASS_TO_HANDLERS;
}
break;
+ case SYN_MT_REPORT:
+ dev->sync = 0;
+ disposition = INPUT_PASS_TO_HANDLERS;
+ break;
}
break;
@@ -192,6 +213,11 @@ static void input_handle_event(struct input_dev *dev,
case EV_ABS:
if (is_event_supported(code, dev->absbit, ABS_MAX)) {
+ if (test_bit(code, input_abs_bypass)) {
+ disposition = INPUT_PASS_TO_HANDLERS;
+ break;
+ }
+
value = input_defuzz_abs_event(value,
dev->abs[code], dev->absfuzz[code]);
@@ -1634,10 +1660,20 @@ static const struct file_operations input_fops = {
.open = input_open_file,
};
+static void __init input_init_abs_bypass(void)
+{
+ const unsigned int *p;
+
+ for (p = input_abs_bypass_init_data; *p; p++)
+ input_abs_bypass[BIT_WORD(*p)] |= BIT_MASK(*p);
+}
+
static int __init input_init(void)
{
int err;
+ input_init_abs_bypass();
+
err = class_register(&input_class);
if (err) {
printk(KERN_ERR "input: unable to register input_dev class\n");