INTEL_DISPLAY_A_PLL
addr_t pllControl = INTEL_DISPLAY_A_PLL;
write32(INTEL_DISPLAY_A_PLL, pll | DISPLAY_PLL_ENABLED);
read32(INTEL_DISPLAY_A_PLL);
write32(INTEL_DISPLAY_A_PLL, read32(INTEL_DISPLAY_A_PLL)
uint32 pll = read32(INTEL_DISPLAY_A_PLL);
write32(INTEL_DISPLAY_A_PLL, pll);
read32(INTEL_DISPLAY_A_PLL);
write32(INTEL_DISPLAY_A_PLL, pll | DISPLAY_PLL_ENABLED);
read32(INTEL_DISPLAY_A_PLL);