SPLL_CTL
intel_de_read(display, SPLL_CTL) & SPLL_PLL_ENABLE,
intel_de_write(display, SPLL_CTL, hw_state->spll);
intel_de_posting_read(display, SPLL_CTL);
intel_de_rmw(display, SPLL_CTL, SPLL_PLL_ENABLE, 0);
intel_de_posting_read(display, SPLL_CTL);
val = intel_de_read(display, SPLL_CTL);
u32 ctl = intel_de_read(display, SPLL_CTL);
switch (vgpu_vreg_t(vgpu, SPLL_CTL) & SPLL_FREQ_MASK) {
vgpu->id, port_name(port), vgpu_vreg_t(vgpu, SPLL_CTL));
MMIO_D(SPLL_CTL);