On Fri, 20 Jan 2012, Tomi Valkeinen wrote: > Third, when I load the DSS modules, I see only ON state increasing for > dss_pwrdm, as it should be. However, I'm getting constant stream of sync > losts from DSS, and the display doesn't basically work at all. > > I can see MPU pwrdm going into RET a lot, and if I do "while true; do > echo foo; done", which I presume basically prevents RET for MPU, the > display becomes stable.
If this particular problem persists after you apply the patch set that I sent earlier, it suggests that something in the DSS is sensitive to the amount of time it takes the MPU to wake up and service an interrupt when the MPU powerdomain is in a low-power state. Total guess, but perhaps omap_dispc_irq_handler() is getting called after each frame and needs to run within a certain bounded time when that happens? - Paul -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
