Comment 1 for bug 1923776

Hardware Certification have completed testing this -proposed kernel. No regressions were observed, results are available here:
Rpi2b-armhf: https://certification.canonical.com/hardware/201906-27188/submission/212314/
Rpi3b-arm64: https://certification.canonical.com/hardware/201907-27197/submission/212322/
Rpi3b-armhf: https://certification.canonical.com/hardware/201907-27197/submission/212310/
Rpi3a+-arm64: https://certification.canonical.com/hardware/201901-26785/submission/212324/
Rpi3a+-armhf: https://certification.canonical.com/hardware/201907-27199/submission/212312/
Rpi3b+-arm64: https://certification.canonical.com/hardware/201810-26542/submission/212544/
Rpi3b+-armhf: https://certification.canonical.com/hardware/201907-27198/submission/212319/
Rpi400-arm64: https://certification.canonical.com/hardware/202010-28328/submission/212325/
Rpi400-armhf: https://certification.canonical.com/hardware/202010-28328/submission/212317/
Rpi4b-1g-arm64: https://certification.canonical.com/hardware/201911-27471/submission/212304/
Rpi4b-1g-armhf: https://certification.canonical.com/hardware/201910-27407/submission/212421/
Rpi4b-2g-arm64: https://certification.canonical.com/hardware/201911-27506/submission/212316/
Rpi4b-2g-armhf: https://certification.canonical.com/hardware/201911-27507/submission/212308/
Rpi4b-4g-arm64: https://certification.canonical.com/hardware/201911-27456/submission/212302/
Rpi4b-4g-armhf: https://certification.canonical.com/hardware/201911-27455/submission/212299/
Rpi4b-8g-arm64: https://certification.canonical.com/hardware/202004-27866/submission/212417/
Rpi4b-8g-armhf: https://certification.canonical.com/hardware/202004-27866/submission/212307/
CM3-arm64: No space to upgrade kernel
CM3-armhf: https://certification.canonical.com/hardware/201711-25992/submission/212419/
CM3+-arm64: https://certification.canonical.com/hardware/201908-27277/submission/212420/
CM3+-armhf: https://certification.canonical.com/hardware/201908-27277/submission/212320/
CM4L-arm64: https://certification.canonical.com/hardware/202011-28409/submission/212340/
CM4L-armhf: https://certification.canonical.com/hardware/202011-28409/submission/212326/