CM4S has no HDMI1 output, so it is advisable to disable the controller
and its I2C interface in software. This is ordinarily done by setting
their status properties to "disabled", but the vc4-kms-v3d(-pi4)
overlay enables both HDMIs and DDCs as part of the transfer of control
from the VPU.
Knobble the CM4S dts in such a way that the overlay applies
successfully but the hdmi1 and ddc1 nodes remain disabled by changing
the compatible string to something unrecognised.
See: https://github.com/raspberrypi/linux/issues/4857
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
The second hdmi port on cm4s is disabled by default (default from
bcm2711-rpi.dtsi) and therefore it is not necessary to remove it in the
specific cm4s overlay (as done in 64328ab674)
Parameterise the overlays so that they can have an optional
cam0 parameter to switch to i2c_vc and csi0.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
CM4S follows CM1/3, so based on the documentation cameras/displays
connect to 0/1 and 28/29, not 0/1 and 44/45.
Likewise the camera regulator controls are independent as on CM1/3.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
