Commit 540a8b6b authored by Imre Deak's avatar Imre Deak

drm/i915/hsw: Use the read-out WRPLL/SPLL state instead of reading out again

Instead of reading out the WRPLL/SPLL control values from HW, we can use
the DPLL state that was already read out, or swapped-to.
Signed-off-by: default avatarImre Deak <imre.deak@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200226203455.23032-13-imre.deak@intel.com
parent b953eb21
......@@ -880,13 +880,10 @@ hsw_ddi_wrpll_get_dpll(struct intel_atomic_state *state,
static int hsw_ddi_wrpll_get_freq(struct drm_i915_private *dev_priv,
const struct intel_shared_dpll *pll)
{
i915_reg_t reg = pll->info->id == DPLL_ID_WRPLL1 ?
WRPLL_CTL(0) : WRPLL_CTL(1);
int refclk;
int n, p, r;
u32 wrpll;
u32 wrpll = pll->state.hw_state.wrpll;
wrpll = intel_de_read(dev_priv, reg);
switch (wrpll & WRPLL_REF_MASK) {
case WRPLL_REF_SPECIAL_HSW:
/*
......@@ -1003,7 +1000,7 @@ static int hsw_ddi_spll_get_freq(struct drm_i915_private *i915,
{
int link_clock = 0;
switch (intel_de_read(i915, SPLL_CTL) & SPLL_FREQ_MASK) {
switch (pll->state.hw_state.spll & SPLL_FREQ_MASK) {
case SPLL_FREQ_810MHz:
link_clock = 81000;
break;
......
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