Draft: rk3588 pocket: MNT SC firmware driver and WIP DP alt-mode for mb2.0, some qcom updates

minuterequested to merge
rk3588-pocket-dp-altmode-and-sc into main

Checklist before merge:

  • Make sure latest reform-tools (from 2026-08-01) is released beforehand so that mnt-sc driver + panel driver is installed in initramfs. If people upgrade the kernel package without that in place, they could lose display output on Pocket Reform, as the driver isn't automatically included in initramfs otherwise.
  • fixup analogix DP patches so that no "phantom" 3rd display appears as connected on MB1/MB2 without USB-C DP plugged in
    • turned off the feature in rk3588-mnt-pocket-reform.dts for now.
  • Test on rk3588 Pocket Reform with display v2
  • Test on imx8mp Pocket Reform with display v2
  • Test on a311d Pocket Reform with display v2
  • Test on rk3588 Pocket Reform with display v1
  • Test on imx8mp Pocket Reform with display v1
    • tested, but it fails to turn on. fix needed
  • Test on a311d Pocket Reform with display v1
  • disable/make sure not to apply PWM on disp_en with display v1!
    • use another virtual gpio for gating the backlight control. display driver unlocks the gate after discovering display v2
Edited by minute

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