11:36 <tomeu> lynxeye: the blob sets the core and bus clock rates to 800mhz, but etnaviv leaves the clocks at 240mhz

11:36 <tomeu> as etnaviv doesn't have devfreq atm, how is etnaviv expected to set the right frequency?

11:37 <tomeu> does it need to be specified in the DT?

11:48 <tomeu> actually, 24mhz, no wonder why it felt so slow

11:55 <tomeu> I hacked the rate to be 800mhz, but I'm now having reliability issues

11:56 <tomeu> guess it is not getting enough power to run at those speeds

12:03 <austriancoder> tomeu: afaict it's done in DT

12:07 <lynxeye> tomeu: yes, no OPP support for now, so the default speed should be configured in DT via assigned clocks

12:11 <tomeu> lynxeye: any idea on why the npu may be unreliable at those speeds and how to tweak the voltage if that is the problem? (have already asked narmstrong as it is on the vim3)

12:21 <tomeu> assigned-clocks works great though

12:52 <lynxeye> tomeu: I have no idea about the exact specifications on the vim3, but the GPU/NPUs support different frequency/voltage tuples. E.g. on the i.MX8MP you can run the GPU at 800MHz/0.9V or 1GHz/1.0V

12:52 <lynxeye> So higher clocks might require higher voltages from the PMIC on the board

12:52 <tomeu> yeah, I'm trying to find a way to specify the voltage for the NPU, but so far the genpd stuff is getting in the way

12:53 <lynxeye> tomeu: Can't you just pin the regulator supplying the domain to the higher voltage?

12:55 <tomeu> haven't found yet where the regulator for the power domain is

13:07 <mntirc> lynxeye: hmm, neat @ 1ghz gpu @ imx8mp

13:11 <tomeu> from the datasheet I have, the regulator to that domain is VDD_EE, but I cannot for the life f me find a reference in the kernel code

13:30 <tomeu> ok, seems to be unmanaged atm

13:31 <tomeu> and probably the bootloader is not setting a high enough voltage for that one

13:52 <tomeu> gah, there is a regulator MP8756GD for VDD_EE in the vim3 schematics, but it doesn't say where the modulating signal is coming from, other than calling it VDDEE_PWM

14:29 <mntirc> tomeu: btw, i assume your work will also be compatible with the npu in imx8mplus, correct?

14:30 <tomeu> they seem to be basically the same, yes

14:35 <mntirc> cool, can't wait to experiment with that

14:36 <mntirc> end of the year we'll ship around 600 mini laptops with 8mp, it will be a cool usecase for npu experiments

14:36 <tomeu> hmm, maybe I should write a blog post with the progress so far and how to try it out

14:36 <tomeu> but you would have to do add the DT bits yourself

14:36 <mntirc> sure