I use generic driver. Photon works fine. 
I follow Advanced Graphics documentation:

#include <cstdlib>
#include <iostream>
#include <gf/gf.h>
#include <stdio.h>

int main(int argc, char *argv[]) {


	gf_dev_t gdev;
	gf_dev_info_t gdev_info;
	gf_display_t display;
	gf_display_info_t display_info;
	if (gf_dev_attach(&gdev, GF_DEVICE_INDEX(0), &gdev_info) != GF_ERR_OK) {
	printf("gf_dev_attach() failed\n");
	return (-1);
	}
	printf("Number of displays: %d\n",gdev_info.ndisplays);
	for (int i = 0; i < gdev_info.ndisplays; i++ )
	{
	printf("Display %d: ", i);
	if (gf_display_attach(&display, gdev, i, &display_info) == GF_ERR_OK) {
	printf("%dX%d, refresh = %dHz\n", display_info.xres,
	display_info.yres, display_info.refresh);
	printf("Number of layers: %d\n", display_info.nlayers);
	} else {
	printf("gf_display_attach() failed\n");
	}
	}


	if (display != NULL) {
	gf_layer_t layer;
	if (gf_layer_attach(&layer, display, display_info.main_layer_index, 0) == GF_ERR_OK)
	{
		printf("gf_layer_attach() success\n");
	}
	} else {
	    printf("gf_layer_attach() failed\n");
	}
}

gf_dev_attach is ok. It init gdev_info and I see display number and refresh rate, but  gf_layer_attach return error.