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libaudiodriver: readd callback to drv_int_sum()

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The callback, which was dropped in commit git-842c4ed, allows drivers
to fetch the interrupt status once and save it locally for subsequent
calls to drv_int().

This fixes #190 .

Change-Id: I83918656f637e716f60e9f4c19f1498f761d3b52
This commit is contained in:
David van Moolenbroek 2016-12-28 13:08:23 +00:00
parent 10a44c0ee2
commit 192c3a97f6
1 changed files with 12 additions and 9 deletions
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3
minix/lib/libaudiodriver/audio_fw.c
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@ -496,6 +496,8 @@ static void msg_hardware(unsigned int UNUSED(mask))
{ {
int i; int i;
/* if we have an interrupt */
if (drv_int_sum()) {
/* loop over all sub devices */ /* loop over all sub devices */
for ( i = 0; i < drv.NrOfSubDevices; i++) { for ( i = 0; i < drv.NrOfSubDevices; i++) {
/* if interrupt from sub device and Dma transfer /* if interrupt from sub device and Dma transfer
@ -507,6 +509,7 @@ static void msg_hardware(unsigned int UNUSED(mask))
handle_int_read(i); handle_int_read(i);
} }
} }
}
/* As IRQ_REENABLE is not on in sys_irqsetpolicy, we must /* As IRQ_REENABLE is not on in sys_irqsetpolicy, we must
* re-enable out interrupt after every interrupt. * re-enable out interrupt after every interrupt.