[PATCH v5 00/21] drm: starfive: jh7110: Enable display subsystem

[OOHehir]

Tested on a VisionFive 2 v1.3B with patches 1-17 & 19-21 of v5 on
Linux 7.2.8, plus the clk patch that was 14/20 in v4. Patch 18 was not
applied: it conflicts on 7.2 & there is no Rockchip hardware here. The
same kernel also carries the out-of-tree PowerVR BXE-4-32 enablement &
the SiFive XPbmtUC errata patches, so the GPU could render to the
display.

- The dc8200, the HDMI controller & PHY & the vout clock controller
  all probe, with nothing left in deferred probe; HDMI-A-1 reports
  connected.
- kmscube (GLES via zink on the PowerVR Vulkan driver) runs at the
  monitor's preferred mode: 1683 frames in 28.1 s, 59.93 fps with
  vsync, picture confirmed on the monitor, no GPU firmware resets.

Only that one mode was tested; the modetest sweep in the cover letter
was not repeated.

One error at boot:

  i2c i2c-7: of_i2c: modalias failure on /soc/display-subsystem at 29400000/hdmi at 29590000/controller/ports
  i2c i2c-7: Failed to create I2C device for /soc/display-subsystem at 29400000/hdmi at 29590000/controller/ports

inno_hdmi_i2c_adapter() sets adap->dev.of_node to the controller's
node, so the I2C core registers the controller's children as I2C
clients, & on the JH7110 that node has a 'ports' child. The display
still comes up. Should the adapter get no of_node, or a dedicated
child node?

For patches 1-17 & 19-21:

Tested-by: OOHehir <oo.hehir at gmail.com>