intel_gmbus_is_valid_pin
if (intel_gmbus_is_valid_pin(display, bus_pin))
if (intel_gmbus_is_valid_pin(display, child->i2c_pin))
if (intel_gmbus_is_valid_pin(display, dvo->gpio))
bool intel_gmbus_is_valid_pin(struct intel_display *display, unsigned int pin);
if (!intel_gmbus_is_valid_pin(display, ddc_pin)) {
intel_gmbus_is_valid_pin(display, mapping->i2c_pin))