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Input: allow certain EV_ABS events to bypass all filtering 

With the upcoming multi-touch interface as an example, there is
a need to make certain that all reported events actually get passed
to the event handler. This patch equips the input core with the
ability to bypass all filtering for certain EV_ABS events.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Henrik Rydberg 2009-04-28 07:45:31 -07:00 committed by Dmitry Torokhov
parent 4c57e379f4
commit 61994a61bc
1 changed files with 23 additions and 0 deletions
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23
drivers/input/input.c
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@ -29,6 +29,14 @@ MODULE_LICENSE("GPL");
#define INPUT_DEVICES 256 #define INPUT_DEVICES 256
/*
* EV_ABS events which should not be cached are listed here.
*/
static unsigned int input_abs_bypass_init_data[] __initdata = {
0
};
static unsigned long input_abs_bypass[BITS_TO_LONGS(ABS_CNT)];
static LIST_HEAD(input_dev_list); static LIST_HEAD(input_dev_list);
static LIST_HEAD(input_handler_list); static LIST_HEAD(input_handler_list);
@ -192,6 +200,11 @@ static void input_handle_event(struct input_dev *dev,
case EV_ABS: case EV_ABS:
if (is_event_supported(code, dev->absbit, ABS_MAX)) { 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, value = input_defuzz_abs_event(value,
dev->abs[code], dev->absfuzz[code]); dev->abs[code], dev->absfuzz[code]);
@ -1634,10 +1647,20 @@ static const struct file_operations input_fops = {
.open = input_open_file, .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) static int __init input_init(void)
{ {
int err; int err;
input_init_abs_bypass();
err = class_register(&input_class); err = class_register(&input_class);
if (err) { if (err) {
printk(KERN_ERR "input: unable to register input_dev class\n"); printk(KERN_ERR "input: unable to register input_dev class\n");