Hi Nishanth, On Mon, Apr 6, 2015 at 6:39 PM, Nishanth Menon <nm@xxxxxx> wrote: > On 04/06/2015 06:42 AM, Ryan wrote: >> >> On Wed, Apr 1, 2015 at 7:17 PM, Nishanth Menon <nm@xxxxxx> wrote: >>> >>> On 04/01/2015 08:18 AM, Ryan wrote: >>>> >>>> Hi, >>>> >>>> I would like to ask a related question here >>> >>> Please try not to top post :). >>> >>>> >>>> If i use performance governor alone - constantly running at the >>>> highest frequency. Does the smart reflex still has a role to play? >>> >>> Yes. cpufreq governor are just policies - cpufreq policies just >>> selects a frequency to run the CPU from a list of frequencies. for >>> each frequency to be achieved, there is ABB, AVS configuration needed >>> (strategy specific to SoC). >> >> >> I was trying to find out where exactly the voltages for core and IVA >> are set in the code. > > > The generic layer for dvfs is yet to be implemented in k.org. > I am using a older TI Kernel. I thought this will a good starting point to understand as the platform i am working on uses this. if you could provide some pointers on who initiates the voltage transition and how for each freq. It would be highly helpful. I did add prints and start tracing It became too complex for me to fully get a understanding. http://git.omapzoom.org/?p=kernel/omap.git;a=tree;h=refs/heads/p-android-omap-3.0;hb=refs/heads/p-android-omap-3.0 >> Are they set whenever for every frequency change? - I see that the > > > yes. > >> table is divided into OPP50, OPP100 and >> so on but was not able to trace the entire path. >> Say if i use a lower freq (OPP50) - Apart from MPU - Should both core and iva voltages should also be set to opp50 voltages as listed in omap446x_vdd_core_volt_data and omap446x_vdd_core_volt_data? >> Also, does smartreflex framework uses the same path to change the >> voltages (omap446x_vdd_core_volt_data, >> omap446x_vdd_core_volt_data) > > > 4460 on Panda-es does not have an implementation yet. > -- > Regards, > Nishanth Menon > -- 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
