drm/i915/icl: use tc_port in MG_PLL macros

Fix the TODO leftover in the code by changing the argument in MG_PLL
macros. The MG_PLL ids used to access the register values can be
converted from tc_port rather than port.

All these registers can use the TC port to calculate the right offsets
because they are only available for TC ports. The range (PORT_C onwards)
may not be stable and change from platform to platform. So by using the
TC id directly we avoid having to check for the platform in the "leaf
functions" and thus passing dev_priv around.

The helper functions were also renamed to use "tc" as prefix to make
them more generic.

v2: Improve commit message and fix checkpatch warning (from Paulo)

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190125222444.19926-2-lucas.demarchi@intel.com

1 files changed, 39 insertions, 40 deletions

diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c
index 606f54dde086..211b3ffa5bed 100644
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
@@ -2639,14 +2639,14 @@ int icl_calc_dp_combo_pll_link(struct drm_i915_private *dev_priv,
 	return link_clock;
 }
 
-static enum port icl_mg_pll_id_to_port(enum intel_dpll_id id)
+static enum tc_port icl_pll_id_to_tc_port(enum intel_dpll_id id)
 {
-	return id - DPLL_ID_ICL_MGPLL1 + PORT_C;
+	return id - DPLL_ID_ICL_MGPLL1;
 }
 
-enum intel_dpll_id icl_port_to_mg_pll_id(enum port port)
+enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port)
 {
-	return port - PORT_C + DPLL_ID_ICL_MGPLL1;
+	return tc_port + DPLL_ID_ICL_MGPLL1;
 }
 
 bool intel_dpll_is_combophy(enum intel_dpll_id id)
@@ -2925,7 +2925,10 @@ icl_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
 			ret = icl_calc_dpll_state(crtc_state, encoder, clock,
 						  &pll_state);
 		} else {
-			min = icl_port_to_mg_pll_id(port);
+			enum tc_port tc_port;
+
+			tc_port = intel_port_to_tc(dev_priv, port);
+			min = icl_tc_port_to_pll_id(tc_port);
 			max = min;
 			ret = icl_calc_mg_pll_state(crtc_state, encoder, clock,
 						    &pll_state);
@@ -2959,12 +2962,8 @@ static i915_reg_t icl_pll_id_to_enable_reg(enum intel_dpll_id id)
 		return CNL_DPLL_ENABLE(id);
 	else if (id == DPLL_ID_ICL_TBTPLL)
 		return TBT_PLL_ENABLE;
-	else
-		/*
-		 * TODO: Make MG_PLL macros use
-		 * tc port id instead of port id
-		 */
-		return MG_PLL_ENABLE(icl_mg_pll_id_to_port(id));
+
+	return MG_PLL_ENABLE(icl_pll_id_to_tc_port(id));
 }
 
 static bool icl_pll_get_hw_state(struct drm_i915_private *dev_priv,
@@ -2974,7 +2973,6 @@ static bool icl_pll_get_hw_state(struct drm_i915_private *dev_priv,
 	const enum intel_dpll_id id = pll->info->id;
 	intel_wakeref_t wakeref;
 	bool ret = false;
-	enum port port;
 	u32 val;
 
 	wakeref = intel_display_power_get_if_enabled(dev_priv,
@@ -2991,32 +2989,33 @@ static bool icl_pll_get_hw_state(struct drm_i915_private *dev_priv,
 		hw_state->cfgcr0 = I915_READ(ICL_DPLL_CFGCR0(id));
 		hw_state->cfgcr1 = I915_READ(ICL_DPLL_CFGCR1(id));
 	} else {
-		port = icl_mg_pll_id_to_port(id);
-		hw_state->mg_refclkin_ctl = I915_READ(MG_REFCLKIN_CTL(port));
+		enum tc_port tc_port = icl_pll_id_to_tc_port(id);
+
+		hw_state->mg_refclkin_ctl = I915_READ(MG_REFCLKIN_CTL(tc_port));
 		hw_state->mg_refclkin_ctl &= MG_REFCLKIN_CTL_OD_2_MUX_MASK;
 
 		hw_state->mg_clktop2_coreclkctl1 =
-			I915_READ(MG_CLKTOP2_CORECLKCTL1(port));
+			I915_READ(MG_CLKTOP2_CORECLKCTL1(tc_port));
 		hw_state->mg_clktop2_coreclkctl1 &=
 			MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK;
 
 		hw_state->mg_clktop2_hsclkctl =
-			I915_READ(MG_CLKTOP2_HSCLKCTL(port));
+			I915_READ(MG_CLKTOP2_HSCLKCTL(tc_port));
 		hw_state->mg_clktop2_hsclkctl &=
 			MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
 			MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
 			MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK |
 			MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK;
 
-		hw_state->mg_pll_div0 = I915_READ(MG_PLL_DIV0(port));
-		hw_state->mg_pll_div1 = I915_READ(MG_PLL_DIV1(port));
-		hw_state->mg_pll_lf = I915_READ(MG_PLL_LF(port));
-		hw_state->mg_pll_frac_lock = I915_READ(MG_PLL_FRAC_LOCK(port));
-		hw_state->mg_pll_ssc = I915_READ(MG_PLL_SSC(port));
+		hw_state->mg_pll_div0 = I915_READ(MG_PLL_DIV0(tc_port));
+		hw_state->mg_pll_div1 = I915_READ(MG_PLL_DIV1(tc_port));
+		hw_state->mg_pll_lf = I915_READ(MG_PLL_LF(tc_port));
+		hw_state->mg_pll_frac_lock = I915_READ(MG_PLL_FRAC_LOCK(tc_port));
+		hw_state->mg_pll_ssc = I915_READ(MG_PLL_SSC(tc_port));
 
-		hw_state->mg_pll_bias = I915_READ(MG_PLL_BIAS(port));
+		hw_state->mg_pll_bias = I915_READ(MG_PLL_BIAS(tc_port));
 		hw_state->mg_pll_tdc_coldst_bias =
-			I915_READ(MG_PLL_TDC_COLDST_BIAS(port));
+			I915_READ(MG_PLL_TDC_COLDST_BIAS(tc_port));
 
 		if (dev_priv->cdclk.hw.ref == 38400) {
 			hw_state->mg_pll_tdc_coldst_bias_mask = MG_PLL_TDC_COLDST_COLDSTART;
@@ -3051,7 +3050,7 @@ static void icl_mg_pll_write(struct drm_i915_private *dev_priv,
 			     struct intel_shared_dpll *pll)
 {
 	struct intel_dpll_hw_state *hw_state = &pll->state.hw_state;
-	enum port port = icl_mg_pll_id_to_port(pll->info->id);
+	enum tc_port tc_port = icl_pll_id_to_tc_port(pll->info->id);
 	u32 val;
 
 	/*
@@ -3060,41 +3059,41 @@ static void icl_mg_pll_write(struct drm_i915_private *dev_priv,
 	 * during the calc/readout phase if the mask depends on some other HW
 	 * state like refclk, see icl_calc_mg_pll_state().
 	 */
-	val = I915_READ(MG_REFCLKIN_CTL(port));
+	val = I915_READ(MG_REFCLKIN_CTL(tc_port));
 	val &= ~MG_REFCLKIN_CTL_OD_2_MUX_MASK;
 	val |= hw_state->mg_refclkin_ctl;
-	I915_WRITE(MG_REFCLKIN_CTL(port), val);
+	I915_WRITE(MG_REFCLKIN_CTL(tc_port), val);
 
-	val = I915_READ(MG_CLKTOP2_CORECLKCTL1(port));
+	val = I915_READ(MG_CLKTOP2_CORECLKCTL1(tc_port));
 	val &= ~MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK;
 	val |= hw_state->mg_clktop2_coreclkctl1;
-	I915_WRITE(MG_CLKTOP2_CORECLKCTL1(port), val);
+	I915_WRITE(MG_CLKTOP2_CORECLKCTL1(tc_port), val);
 
-	val = I915_READ(MG_CLKTOP2_HSCLKCTL(port));
+	val = I915_READ(MG_CLKTOP2_HSCLKCTL(tc_port));
 	val &= ~(MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
 		 MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
 		 MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK |
 		 MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK);
 	val |= hw_state->mg_clktop2_hsclkctl;
-	I915_WRITE(MG_CLKTOP2_HSCLKCTL(port), val);
+	I915_WRITE(MG_CLKTOP2_HSCLKCTL(tc_port), val);
 
-	I915_WRITE(MG_PLL_DIV0(port), hw_state->mg_pll_div0);
-	I915_WRITE(MG_PLL_DIV1(port), hw_state->mg_pll_div1);
-	I915_WRITE(MG_PLL_LF(port), hw_state->mg_pll_lf);
-	I915_WRITE(MG_PLL_FRAC_LOCK(port), hw_state->mg_pll_frac_lock);
-	I915_WRITE(MG_PLL_SSC(port), hw_state->mg_pll_ssc);
+	I915_WRITE(MG_PLL_DIV0(tc_port), hw_state->mg_pll_div0);
+	I915_WRITE(MG_PLL_DIV1(tc_port), hw_state->mg_pll_div1);
+	I915_WRITE(MG_PLL_LF(tc_port), hw_state->mg_pll_lf);
+	I915_WRITE(MG_PLL_FRAC_LOCK(tc_port), hw_state->mg_pll_frac_lock);
+	I915_WRITE(MG_PLL_SSC(tc_port), hw_state->mg_pll_ssc);
 
-	val = I915_READ(MG_PLL_BIAS(port));
+	val = I915_READ(MG_PLL_BIAS(tc_port));
 	val &= ~hw_state->mg_pll_bias_mask;
 	val |= hw_state->mg_pll_bias;
-	I915_WRITE(MG_PLL_BIAS(port), val);
+	I915_WRITE(MG_PLL_BIAS(tc_port), val);
 
-	val = I915_READ(MG_PLL_TDC_COLDST_BIAS(port));
+	val = I915_READ(MG_PLL_TDC_COLDST_BIAS(tc_port));
 	val &= ~hw_state->mg_pll_tdc_coldst_bias_mask;
 	val |= hw_state->mg_pll_tdc_coldst_bias;
-	I915_WRITE(MG_PLL_TDC_COLDST_BIAS(port), val);
+	I915_WRITE(MG_PLL_TDC_COLDST_BIAS(tc_port), val);
 
-	POSTING_READ(MG_PLL_TDC_COLDST_BIAS(port));
+	POSTING_READ(MG_PLL_TDC_COLDST_BIAS(tc_port));
 }
 
 static void icl_pll_enable(struct drm_i915_private *dev_priv,