"Munegowda, Keshava" <keshava_mgowda@xxxxxx> writes: [...] >>> >>> hi kevin >>> >>> here is pm count log on beagle XM with the above patch: >> >> What are you meaning to show by this log? >> >> This dump shows that neither PER or CORE are hitting retention in idle. >> Which sounds to me like you have not enabled UART runtime suspend: >> >> echo 3000 > /sys/devices/platform/omap_uart.0/power/autosuspend_delay_ms >> echo 3000 > /sys/devices/platform/omap_uart.1/power/autosuspend_delay_ms >> echo 3000 > /sys/devices/platform/omap_uart.2/power/autosuspend_delay_ms >> echo 3000 > /sys/devices/platform/omap_uart.3/power/autosuspend_delay_ms >> >> My test with your patch shows that it fixes the oops during boot, and >> doesn't hang during suspend, but that USB host is still preventing CORE >> retention during idle (after UART runtime suspend is enabled.) >> >> This happens on 3530/Overo, 3630/Beagle-xM and 3730/Overo >> >> Setting CONFIG_MFD_OMAP_USB_HOST=n allows CORE to hit retention again. >> >> Kevin > > > > Hi kevin > It woks. only the log was wrong. I was using no_console_suspend > in boot args. > i removed it. now I can see the core retention hits with USB host in Beagle XM. > below is the log: > You are not reading what I write. To repeat: your patch fixes the oops during boot, and the suspend hang and now I see CORE hit retention in *suspend*. However, CORE does still not hit retention during *idle*. Setting CONFIG_MFD_OMAP_USB_HOST=n allows CORE to hit retention again. Please investgate the *idle* problems caused by this driver. As I said way back in the beginning this thread. The runtime PM of this driver is leaving the device enabled. To test idle retention, ensure the UART auto-suspend is enable for all UARTS: echo 3000 > /sys/devices/platform/omap_uart.0/power/autosuspend_delay_ms echo 3000 > /sys/devices/platform/omap_uart.1/power/autosuspend_delay_ms echo 3000 > /sys/devices/platform/omap_uart.2/power/autosuspend_delay_ms echo 3000 > /sys/devices/platform/omap_uart.3/power/autosuspend_delay_ms Then wait > 3 seconds and 'cat /debug/pm_debug/count'. Kevin -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
