Hi Manu, On 11/01/18 03:41, Manu Gautam wrote: > Hi, > > > On 1/10/2018 6:18 PM, Roger Quadros wrote: >> Hi Manu, >> >> On 27/09/17 14:19, Manu Gautam wrote: >>> Driver powers-off PHYs and reinitializes DWC3 core and gadget on >>> resume. While this works fine for gadget mode but in host >>> mode there is not re-initialization of host stack. Also, resetting >>> bus as part of bus_suspend/resume is not correct which could affect >>> (or disconnect) connected devices. >>> Fix this by not reinitializing core on suspend/resume in host mode >>> for HOST only and OTG/drd configurations. >>> >> All this seems correct but we (TI) were relying on dwc3_core_exit() to be called >> during dwc3_suspend() to have the lowest power state for our platforms. >> >> After this patch, DWC3 controller and PHYs won't be turned off thus >> preventing our platform from reaching low power levels. >> >> So this is a regression for us (TI) in v4.15-rc. >> >> Felipe, do you agree? >> >> If yes I can send a patch which fixes the regression >> and also makes USB host work after suspend/resume. >> > > I think it will be better to separate runtime_suspend and pm_suspend handling for > host mode in dwc3. Powering offf/on PHYs and dwc3_core_exit/init across system > suspend-resume should be ok but doing that for runtime suspend-resume is not > correct. > Let me know if that sounds ok, I can provide a patch for same instead of > reverting this which affects runtime PM with dwc3 host. > Also, we need to consider dwc3 in Host mode with dr_mode as DRD/OTG similar to > dr_mode as HOST. > > Are you going to provide a patch for this any time soon? FYI, suspend/resume is broken on DRA7x with Dual-role while in host mode. -- cheers, -roger Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
