diff options
Diffstat (limited to 'board/dingdong/board.c')
| -rw-r--r-- | board/dingdong/board.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/board/dingdong/board.c b/board/dingdong/board.c index cdeb95342c..2896135389 100644 --- a/board/dingdong/board.c +++ b/board/dingdong/board.c @@ -34,16 +34,16 @@ void hpd_event(enum gpio_signal signal); * 3. irq : downstream display sink signalling an interrupt. * * The debounce times for these various events are: - * 100MSEC : min pulse width of level value. - * 2MSEC : min pulse width of IRQ low pulse. Max is level debounce min. + * HPD_USTREAM_DEBOUNCE_LVL : min pulse width of level value. + * HPD_USTREAM_DEBOUNCE_IRQ : min pulse width of IRQ low pulse. * * lvl(n-2) lvl(n-1) lvl prev_delta now_delta event * ---------------------------------------------------- - * 1 0 1 <2ms n/a low glitch (ignore) - * 1 0 1 >2ms <100ms irq - * x 0 1 n/a >100ms high - * 0 1 0 <100ms n/a high glitch (ignore) - * x 1 0 n/a >100ms low + * 1 0 1 <IRQ n/a low glitch (ignore) + * 1 0 1 >IRQ <LVL irq + * x 0 1 n/a >LVL high + * 0 1 0 <LVL n/a high glitch (ignore) + * x 1 0 n/a >LVL low */ void hpd_irq_deferred(void) @@ -77,14 +77,15 @@ void hpd_event(enum gpio_signal signal) hook_call_deferred(hpd_lvl_deferred, -1); /* It's a glitch. Previous time moves but level is the same. */ - if (cur_delta < HPD_DEBOUNCE_IRQ) + if (cur_delta < HPD_USTREAM_DEBOUNCE_IRQ) return; - if ((!hpd_prev_level && level) && (cur_delta < HPD_DEBOUNCE_LVL)) + if ((!hpd_prev_level && level) && + (cur_delta < HPD_USTREAM_DEBOUNCE_LVL)) /* It's an irq */ hook_call_deferred(hpd_irq_deferred, 0); - else if (cur_delta >= HPD_DEBOUNCE_LVL) - hook_call_deferred(hpd_lvl_deferred, HPD_DEBOUNCE_LVL); + else if (cur_delta >= HPD_USTREAM_DEBOUNCE_LVL) + hook_call_deferred(hpd_lvl_deferred, HPD_USTREAM_DEBOUNCE_LVL); hpd_prev_level = level; } |