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sys/dev/sound/pci/hda/hdac.c
| Show First 20 Lines • Show All 378 Lines • ▼ Show 20 Lines | hdac_intr_handler(void *context) | ||||
| * It is plausible that hardware interrupts a host only when GIS goes | * It is plausible that hardware interrupts a host only when GIS goes | ||||
| * from zero to one. GIS is formed by OR-ing multiple hardware | * from zero to one. GIS is formed by OR-ing multiple hardware | ||||
| * statuses, so it's possible that a previously cleared status gets set | * statuses, so it's possible that a previously cleared status gets set | ||||
| * again while another status has not been cleared yet. Thus, there | * again while another status has not been cleared yet. Thus, there | ||||
| * will be no new interrupt as GIS always stayed set. If we don't | * will be no new interrupt as GIS always stayed set. If we don't | ||||
| * re-examine GIS then we can leave it set and never get an interrupt | * re-examine GIS then we can leave it set and never get an interrupt | ||||
| * again. | * again. | ||||
| */ | */ | ||||
| intsts = HDAC_READ_4(&sc->mem, HDAC_INTSTS); | |||||
| while ((intsts & HDAC_INTSTS_GIS) != 0) { | |||||
| hdac_lock(sc); | hdac_lock(sc); | ||||
| intsts = HDAC_READ_4(&sc->mem, HDAC_INTSTS); | |||||
| while (intsts != 0xffffffff && (intsts & HDAC_INTSTS_GIS) != 0) { | |||||
| hdac_one_intr(sc, intsts); | hdac_one_intr(sc, intsts); | ||||
| hdac_unlock(sc); | |||||
| intsts = HDAC_READ_4(&sc->mem, HDAC_INTSTS); | intsts = HDAC_READ_4(&sc->mem, HDAC_INTSTS); | ||||
| } | } | ||||
| hdac_unlock(sc); | |||||
| } | } | ||||
| static void | static void | ||||
| hdac_poll_callback(void *arg) | hdac_poll_callback(void *arg) | ||||
| { | { | ||||
| struct hdac_softc *sc = arg; | struct hdac_softc *sc = arg; | ||||
| if (sc == NULL) | if (sc == NULL) | ||||
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