vga_switcheroo_pwr_state
ret = vga_switcheroo_pwr_state(client);
vga_switcheroo_pwr_state(client) ? "Pwr" : "Off",
if (vga_switcheroo_pwr_state(new_client) == VGA_SWITCHEROO_OFF)
if (vga_switcheroo_pwr_state(active) == VGA_SWITCHEROO_ON)