intel_vga_read
return intel_vga_read(display, VGA_IS0_R, true) & (1 << 4);
sr1 = intel_vga_read(display, VGA_SEQ_D, mmio);
msr = intel_vga_read(display, VGA_MIS_R, mmio);
u8 intel_vga_read(struct intel_display *display, u16 reg, bool mmio);