diff options
| -rw-r--r-- | driver/led/oz554.c | 16 | ||||
| -rw-r--r-- | driver/led/oz554.h | 4 |
2 files changed, 19 insertions, 1 deletions
diff --git a/driver/led/oz554.c b/driver/led/oz554.c index 4a1c46da0c..aa50028420 100644 --- a/driver/led/oz554.c +++ b/driver/led/oz554.c @@ -99,7 +99,21 @@ DECLARE_DEFERRED(backlight_enable_deferred); void backlight_enable_interrupt(enum gpio_signal signal) { - hook_call_deferred(&backlight_enable_deferred_data, 30 * MSEC); + /* + * 1. Spec says backlight should be turned on after 500ms + * after eDP signals are ready. + * + * 2. There's no way to get exact eDP ready time, therefore, + * give one second delay. + * + * power up __/---------------- + * eDP ______/------------ + * backlight _____________/----- + * |- t1 -| : >=500 ms + * |- t2 -| : 1 second is enough + */ + hook_call_deferred(&backlight_enable_deferred_data, + OZ554_POWER_BACKLIGHT_DELAY); } int oz554_set_config(int offset, int data) diff --git a/driver/led/oz554.h b/driver/led/oz554.h index bb45a17f30..009728ba73 100644 --- a/driver/led/oz554.h +++ b/driver/led/oz554.h @@ -21,6 +21,10 @@ void oz554_board_init(void) __attribute__((weak)); */ int oz554_set_config(int offset, int data); +#ifndef OZ554_POWER_BACKLIGHT_DELAY +#define OZ554_POWER_BACKLIGHT_DELAY SECOND +#endif + void backlight_enable_interrupt(enum gpio_signal signal); #endif |