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Draft: [C25][HDMI] enable HDMI video output in U-Boot for modules with enabled HDMI feature

Mikhail Vanyulin requested to merge seco_lf_v2021.04_develop_c25_hdmi into seco_lf_v2021.04_develop_c25

Following logic added to U-Boot:

  • enabled HDMI in U-Boot config;
  • in device tree, added an HDMI node; routed DCSS to HDMI; defined a power_regulator/switch for HDMI;
  • in board file, added a check whether the HDMI feature is present on particular C25 device,
  • in board file, added a routine to activate HDMI via corresponding GPIO/power_regulator if the HDMI feature is present.
Edited by Mikhail Vanyulin

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