On Friday 18 February 2011 03:20 PM, Valkeinen, Tomi wrote:
On Fri, 2011-02-18 at 03:45 -0600, Turquette, Mike wrote:
<snip>
PRM_IRQSTATUS_* registers will have status bits set even when the
corresponding PRM_IRQENABLE_* bits are not set. The common assumption
was that status bits would not be set if interrupts weren't enabled
and this caused us some issues in prcm_interrupt_handler some time
back. I don't know how DSS_IRQSTATUS works under the hood, but be
careful of such assumptions :-)
And, there is no DSS_IRQENABLE at all in our case :)
That's how DISPC_IRQ* and DSI_IRQ* also works. But that's not what this
discussion was about =). DISPC and DSI have a shared interrupt line, and
there's a DSS_IRQSTATUS register with two bits, telling if the interrupt
was for DISPC or DSI.
Tomi
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