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input: Allow repeat filtering to be disabled

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Generally the input library handles processing of a list of scanned keys.
Repeated keys need to be generated based on a timer in this case, since all
that is provided is a list of keys current depressed.

Keyboards which do their own scanning will resend codes when they want to
inject a repeating key. Provide a function which tells the input library to
accept repeating keys and not to try to second-guess the caller.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-10-18 21:17:25 -06:00
parent 3a85e4362a
commit 0b186c0825
2 changed files with 26 additions and 2 deletions
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9
drivers/input/input.c
View file

@ -413,8 +413,8 @@ static int _input_send_keycodes(struct input_config *config, int keycode[],
* insert another character if we later realise that we
* have missed a repeat slot.
*/
is_repeat = config->repeat_rate_ms &&
(int)get_timer(config->next_repeat_ms) >= 0;
is_repeat = config->allow_repeats || (config->repeat_rate_ms &&
(int)get_timer(config->next_repeat_ms) >= 0);
if (!is_repeat)
return 0;
}
@ -495,6 +495,11 @@ void input_set_delays(struct input_config *config, int repeat_delay_ms,
config->repeat_rate_ms = repeat_rate_ms;
}
void input_allow_repeats(struct input_config *config, bool allow_repeats)
{
config->allow_repeats = allow_repeats;
}
int input_add_tables(struct input_config *config)
{
int ret;

19
include/input.h
View file

@ -57,6 +57,7 @@ struct input_config {
* unknown
*/
int (*read_keys)(struct input_config *config);
bool allow_repeats; /* Don't filter out repeats */
unsigned int next_repeat_ms; /* Next time we repeat a key */
unsigned int repeat_delay_ms; /* Time before autorepeat starts */
unsigned int repeat_rate_ms; /* Autorepeat rate in ms */
@ -142,6 +143,24 @@ int input_stdio_register(struct stdio_dev *dev);
void input_set_delays(struct input_config *config, int repeat_delay_ms,
int repeat_rate_ms);
/**
* Tell the input layer whether to allow the caller to determine repeats
*
* Generally the input library handles processing of a list of scanned keys.
* Repeated keys need to be generated based on a timer in this case, since all
* that is provided is a list of keys current depressed.
*
* Keyboards which do their own scanning will resend codes when they want to
* inject a repeating key. This function can be called at start-up to select
* this behaviour.
*
* @param config Input state
* @param allow_repeats true to repeat depressed keys every time
* input_send_keycodes() is called, false to do normal
* keyboard repeat processing with a timer.
*/
void input_allow_repeats(struct input_config *config, bool allow_repeats);
/**
* Set up the key map tables
*