drm/i915/tgl: Add DPLL registers

On TGL the port programming for combophy is very similar to ICL, so
adapt the callers to possibly use the different register values.

v2 (Lucas): Add TODO with about DPLL4 (requested by Ville)

Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190711173115.28296-21-lucas.demarchi@intel.com

drivers/gpu/drm/i915/display/intel_dpll_mgr.c

@@ -3119,8 +3119,13 @@ static bool icl_pll_get_hw_state(struct drm_i915_private *dev_priv,
 	if (!(val & PLL_ENABLE))
 		goto out;
 
-	hw_state->cfgcr0 = I915_READ(ICL_DPLL_CFGCR0(id));
-	hw_state->cfgcr1 = I915_READ(ICL_DPLL_CFGCR1(id));
+	if (INTEL_GEN(dev_priv) >= 12) {
+		hw_state->cfgcr0 = I915_READ(TGL_DPLL_CFGCR0(id));
+		hw_state->cfgcr1 = I915_READ(TGL_DPLL_CFGCR1(id));
+	} else {
+		hw_state->cfgcr0 = I915_READ(ICL_DPLL_CFGCR0(id));
+		hw_state->cfgcr1 = I915_READ(ICL_DPLL_CFGCR1(id));
+	}
 
 	ret = true;
 out:
@@ -3154,10 +3159,19 @@ static void icl_dpll_write(struct drm_i915_private *dev_priv,
 {
 	struct intel_dpll_hw_state *hw_state = &pll->state.hw_state;
 	const enum intel_dpll_id id = pll->info->id;
+	i915_reg_t cfgcr0_reg, cfgcr1_reg;
+
+	if (INTEL_GEN(dev_priv) >= 12) {
+		cfgcr0_reg = TGL_DPLL_CFGCR0(id);
+		cfgcr1_reg = TGL_DPLL_CFGCR1(id);
+	} else {
+		cfgcr0_reg = ICL_DPLL_CFGCR0(id);
+		cfgcr1_reg = ICL_DPLL_CFGCR1(id);
+	}
 
-	I915_WRITE(ICL_DPLL_CFGCR0(id), hw_state->cfgcr0);
-	I915_WRITE(ICL_DPLL_CFGCR1(id), hw_state->cfgcr1);
-	POSTING_READ(ICL_DPLL_CFGCR1(id));
+	I915_WRITE(cfgcr0_reg, hw_state->cfgcr0);
+	I915_WRITE(cfgcr1_reg, hw_state->cfgcr1);
+	POSTING_READ(cfgcr1_reg);
 }
 
 static void icl_mg_pll_write(struct drm_i915_private *dev_priv,

drivers/gpu/drm/i915/i915_reg.h

@@ -242,6 +242,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define _MMIO_PIPE3(pipe, a, b, c)	_MMIO(_PICK(pipe, a, b, c))
 #define _MMIO_PORT3(pipe, a, b, c)	_MMIO(_PICK(pipe, a, b, c))
 #define _MMIO_PHY3(phy, a, b, c)	_MMIO(_PHY3(phy, a, b, c))
+#define _MMIO_PLL3(pll, a, b, c)	_MMIO(_PICK(pll, a, b, c))
 
 /*
  * Device info offset array based helpers for groups of registers with unevenly
@@ -9955,6 +9956,22 @@ enum skl_power_gate {
 #define ICL_DPLL_CFGCR1(pll)		_MMIO_PLL(pll, _ICL_DPLL0_CFGCR1, \
 						  _ICL_DPLL1_CFGCR1)
 
+#define _TGL_DPLL0_CFGCR0		0x164284
+#define _TGL_DPLL1_CFGCR0		0x16428C
+/* TODO: add DPLL4 */
+#define _TGL_TBTPLL_CFGCR0		0x16429C
+#define TGL_DPLL_CFGCR0(pll)		_MMIO_PLL3(pll, _TGL_DPLL0_CFGCR0, \
+						  _TGL_DPLL1_CFGCR0, \
+						  _TGL_TBTPLL_CFGCR0)
+
+#define _TGL_DPLL0_CFGCR1		0x164288
+#define _TGL_DPLL1_CFGCR1		0x164290
+/* TODO: add DPLL4 */
+#define _TGL_TBTPLL_CFGCR1		0x1642A0
+#define TGL_DPLL_CFGCR1(pll)		_MMIO_PLL3(pll, _TGL_DPLL0_CFGCR1, \
+						   _TGL_DPLL1_CFGCR1, \
+						   _TGL_TBTPLL_CFGCR1)
+
 /* BXT display engine PLL */
 #define BXT_DE_PLL_CTL			_MMIO(0x6d000)
 #define   BXT_DE_PLL_RATIO(x)		(x)	/* {60,65,100} * 19.2MHz */