A Cessna 172 pilot reported a complete failure of aircraft flight instruments; resulting in a return to the departure airport.

Narrative

I was on an IFR currency flight. The aircraft has a Dynon Skyview PFD (Primary Flight Display) and a Dynon backup AI; altitude and airspeed. I had flown from ZZZ1 to ZZZ largely in IMC. I had the pitot heat on and the outside air temp in the clouds was 44F. After shooting the RNAV XX and completing a touch and go; I was climbing in VMC when the attitude indicator tumbled to full nose up; then full nose down. Even in VMC this was incredibly disorienting; as I was concentrating on flying a precise heading. Once I looked at the ground and reoriented myself; I noted that the airspeed indicator was cycling between 0-20 knots and the angle of attack audible warning indicator was beeping. I verified the pitch and power settings and continued to climb. The backup/secondary airspeed indicator was also showing similar erroneous values. I called ZZZ Center (we were already in communication) and let them know my gyros had tumbled and I had no primary or secondary airspeed. I cancelled IFR and they offered to keep me on Flight Following; which I welcomed. I realize now it was an ADC/AHRS failure; not a tumbling gyro; but that's what came to mind to describe what was happening to ATC. I elected to continue back to my home airport at ZZZ1 because I was confident in my ability to fly pitch and power in cruise. I also wanted the longer runway and emergency services at ZZZ1. It was really only slowing down during the approach to landing that I was worried about. ZZZ Center offered ideas to try and troubleshoot the issue. That was great; but unfortunately nothing worked. Once I was handed off to ZZZ Approach on XXX.XX; I [requested priority handling] and asked for fire/rescue equipment. I also informed Approach that I would be making a right base entry to RWY XY; which was the entry with the least amount of turns and the most descending in a straight line from where I was. I landed at a higher speed than normal with flaps 10. I was guesstimating my airspeed by adjusting my GPS groundspeed by the known wind. ZZZ Tower gave me a groundspeed callout on the base-to-final turn which I appreciated. I floated a bit; but the landing was not a big deal and I taxied to parking. I want to specifically note the assistance provided by ATC. All of the controllers I spoke with; before and after [requesting priority handling]; were calm and helpful; and anticipated things I might want to know or be asking for. I felt like I wasn't alone (I was the only person in the aircraft). I am also thankful this event happened while I was flying the club plane. During primary training; my instructor covered all the flight instruments with paper and had me fly traffic patterns by feel alone. So; even though I was nervous; I had confidence that I could handle the situation because I'd done it before. I am sure not all of the pilots in my club got that during primary training.