My company has developed a custom base board based on SECO uQ7 I.MX6 CPU.
Le problem is that HDMI TMDS pins have been connected to an FPGA whereas E-DDC pins have been connected to an HDMI output connector.
Now we want to output i.MX6 HDMI (to the FPGA) even if no monitor is connected (thus hotplug remains 0: off).
Is there a way to emulate the attachment and detachment of the “HDMI display” via software?
in kernel/driver/video/mxc_hdmi.c, there is a function names "mxc_hdmi_hotplug( )" which will execute when user plug in/out HDMI cable but I don't know the underlying interrupt mechanism that triggers this function.
Also how can I submit dummy E-DDC to the i.MX6?