* Ivaylo Dimitrov <ivo.g.dimitrov.75@xxxxxxxxx> [160507 08:24]: > once omap_dm_timer_start() is called, which calls omap_dm_timer_enable() > and thus pm_runtime_get_sync(), it doesn't make sense to call PM runtime > functions again before omap_dm_timer_stop is called(). Otherwise PM runtime > functions called in omap_dm_timer_enable/disable lead to long and unneeded > delays. > > Fix that by implementing an "enabled" counter, so the PM runtime functions > get called only when really needed. > > Without that patch Nokia N900 IR TX driver (ir-rx51) does not function. We should use pm_runtime for the refcounting though and call PM runtime unconditionally. Can you try to follow the standard PM runtime usage like this: init: pm_runtime_use_autosuspend(&timer->pdev->dev); pm_runtime_set_autosuspend_delay(&timer->pdev->dev, 200); pm_runtime_enable(&timer->pdev->dev); ... enable: pm_runtime_get_sync(&timer->pdev->dev); ... disable: pm_runtime_mark_last_busy(&timer->pdev->dev); pm_runtime_put_autosuspend(&timer->pdev->dev); ... exit: pm_runtime_dont_use_autosuspend(&timer->pdev->dev); pm_runtime_put_sync(&timer->pdev->dev); pm_runtime_disable(&timer->pdev->dev); No idea what the timeout should be, maybe less than 200 ms. Also we need to test that off idle still works with timer1, that might need special handling. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
