By the time icl_ddi_clock_get() is called we've just got the hw state
from the pll registers. We don't need to read them again: we can rather
reuse what was cached in the dpll_hw_state.
Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_ddi.c | 39 +++++++++++++++-----------------
1 file changed, 18 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index fe52af9fa4aa..0ea5a97dfe9d 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1372,26 +1372,20 @@ static int icl_calc_tbt_pll_link(struct drm_i915_private *dev_priv,
}
}
-static int icl_calc_mg_pll_link(struct drm_i915_private *dev_priv,
- enum port port)
+
+static int icl_calc_mg_pll_link(struct intel_dpll_hw_state *state, u32 refclk)
{
- enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
- u32 mg_pll_div0, mg_clktop_hsclkctl;
- u32 m1, m2_int, m2_frac, div1, div2, refclk;
+ u32 m1, m2_int, m2_frac, div1, div2;
u64 tmp;
- refclk = dev_priv->cdclk.hw.ref;
-
- mg_pll_div0 = I915_READ(MG_PLL_DIV0(tc_port));
- mg_clktop_hsclkctl = I915_READ(MG_CLKTOP2_HSCLKCTL(tc_port));
-
- m1 = I915_READ(MG_PLL_DIV1(tc_port)) & MG_PLL_DIV1_FBPREDIV_MASK;
- m2_int = mg_pll_div0 & MG_PLL_DIV0_FBDIV_INT_MASK;
- m2_frac = (mg_pll_div0 & MG_PLL_DIV0_FRACNEN_H) ?
- (mg_pll_div0 & MG_PLL_DIV0_FBDIV_FRAC_MASK) >>
+ m1 = state->mg_pll_div1 & MG_PLL_DIV1_FBPREDIV_MASK;
+ m2_int = state->mg_pll_div0 & MG_PLL_DIV0_FBDIV_INT_MASK;
+ m2_frac = (state->mg_pll_div0 & MG_PLL_DIV0_FRACNEN_H) ?
+ (state->mg_pll_div0 & MG_PLL_DIV0_FBDIV_FRAC_MASK) >>
MG_PLL_DIV0_FBDIV_FRAC_SHIFT : 0;
- switch (mg_clktop_hsclkctl & MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK) {
+ switch (state->mg_clktop2_hsclkctl &
+ MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK) {
case MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_2:
div1 = 2;
break;
@@ -1405,12 +1399,14 @@ static int icl_calc_mg_pll_link(struct drm_i915_private *dev_priv,
div1 = 7;
break;
default:
- MISSING_CASE(mg_clktop_hsclkctl);
+ MISSING_CASE(state->mg_clktop2_hsclkctl);
return 0;
}
- div2 = (mg_clktop_hsclkctl & MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK) >>
+ div2 = (state->mg_clktop2_hsclkctl &
+ MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK) >>
MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_SHIFT;
+
/* div2 value of 0 is same as 1 means no div */
if (div2 == 0)
div2 = 1;
@@ -1457,9 +1453,6 @@ static void icl_ddi_clock_get(struct intel_encoder *encoder,
struct intel_dpll_hw_state *state;
enum port port = encoder->port;
int link_clock = 0;
- u32 pll_id;
-
- pll_id = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);
/* For DDI ports we always use a shared PLL. */
if (WARN_ON(!pipe_config->shared_dpll))
@@ -1470,10 +1463,14 @@ static void icl_ddi_clock_get(struct intel_encoder *encoder,
if (intel_port_is_combophy(dev_priv, port)) {
link_clock = cnl_calc_wrpll_link(dev_priv, state);
} else {
+ enum intel_dpll_id pll_id = intel_get_shared_dpll_id(dev_priv,
+ pipe_config->shared_dpll);
+
if (pll_id == DPLL_ID_ICL_TBTPLL)
link_clock = icl_calc_tbt_pll_link(dev_priv, port);
else
- link_clock = icl_calc_mg_pll_link(dev_priv, port);
+ link_clock = icl_calc_mg_pll_link(
+ state, dev_priv->cdclk.hw.ref);
}
end:
--
2.20.1
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