in imx6Q, there is a pin called "HDMI_HPD" which tell imx6 if HDMI cable is attached or not.
and in kernel/driver/video/mxc_hdmi.c, there is a function names "mxc_hdmi_hotplug( )" which will excuted when user plug in/out HDMI cable.
I wonder how does GIC detect a interrupt by HDMI_HPD pin? edge, or level high/low? If I plugin HDMI and boot(this means no rising or falling edge will happen), the system still enter the mxc_hdmi_hotplug( ).
could someone tell me how GIC got affected by HDMI_HPD pin. thanks.