Mtl dgpu

[mkopec]

No description provided.

[miczyg1]

The ADC can be configured for 0 - AVCC range with ADCIVMFSCS1. It doesn't have to be in range of 0 - AVCC/1.1

[miczyg1]

Schematics says GPF2 and GPF3 is 1.8V

[mkopec]

GPF3 thankfully goes to U56 which accepts 1.2 ~ 5V, but yeah this probably needs to be fixed.

[miczyg1]

The GPIO voltage settings do not seem to cover all GPIOs annotated as 1.8V in schematics. List of GPIO that are marked 1.8V on schematics:

• GPD {0,1,2,3,4,}
• GPE {0,6, 7}
• GPF {2,3,4,5,6, 7}
• GPC {0,1,2}
• GPH0 (GPH1 should be 1.8V as well, discussed in separate thread)
• GPB5
• GPA {4,5}

GPIO set to 1.8V by the code (according to comments):

• GPB5
• GPD {2,3}
• GPF {6,7}
• GPH {0,1}

So there is a lot of GPIOs with incorrect voltage probably:

• GPD {0,1} - GCR19 bits 2 and 1, GPD4 - GCR29 bit 6
• GPE {0,6,7} - GCR20 bits 5,4,3
• GPF {2,3,4} - GCR20 bits 2,1,0; GPF5 - GCR21 bit 7
• GPC {1,2} - GCR19 bits 5,4; GPC0 does not seem to have voltage selection, although it should be 1.8V, because it is connected to an AND gate supplied by 1.8V power
• GPA {4,5} - GCR22 bits 3,2

Same comments apply to both dGPU variants

[miczyg1]

Are we goign to fix those 1.8V pins as in my above comment? @mkopec

[mkopec]

We are, I just need to review the schematics again to confirm these 100%. Do note that this config was dumped from Clevo firmware so it's probably not going to cause overvoltage issues outright. It's also possible the schematics are wrong...

[miczyg1]

We are, I just need to review the schematics again to confirm these 100%. Do note that this config was dumped from Clevo firmware so it's probably not going to cause overvoltage issues outright. It's also possible the schematics are wrong...

I just did that for you in the above comment. Again, if you lower the voltage of the pins from 3.3V to 1.8V it won't cause overvoltage, maybe undervoltage... I also have been checking what the signals are used for and what their voltage should be.