Hi Geert, On Wed, May 27, 2020 at 09:34:30AM +0200, Geert Uytterhoeven wrote: > On Wed, May 27, 2020 at 9:16 AM Eugeniu Rosca <erosca@xxxxxxxxxxxxxx> wrote: > > On Tue, Oct 15, 2019 at 12:46:13PM +0200, Jacopo Mondi wrote: > > > CMM functionalities are retained between suspend/resume cycles (tested with > > > suspend-to-idle) without requiring a re-programming of the LUT tables. > > > > Hmm. Is this backed up by any statement in the HW User's manual? > > This comes in contrast with the original Renesas CMM implementation [**] > > which does make use of suspend (where the freeze actually happens). > > > > Can we infer, based on your statement, that we could also get rid of > > the suspend callback in [**]? > > While the CMM state will be retained across suspend-to-idle, I'm quite > sure it will be lost by suspend-to-RAM, at least on the Salvator-X(S), > ULCB, and Ebisu development boards, as PSCI will ask the BD9571WMV > regulator to power down the R-Car SoC. > > So IMHO we do need suspend/resume handling. That makes sense. I should be more careful about suspend-to-idle vs suspend-to-ram and not alias the two. -- Best regards, Eugeniu Rosca
