drm/i915/dg1: Add DPLL macros for DG1

DG1 has 4 DPLLs where DPLL0 and DPLL1 drive DDIA/B and
DPLL2 and DPLL3 drive DDI-TC1/DDI-TC2.

Introduce DG1_DPLL_CFCRx() helper macros to configure
DPLL registers.

Bspec: 50288, 50299

Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Aditya Swarup <aditya.swarup@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201014191937.1266226-4-lucas.demarchi@intel.com
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 04c966a..0b67c86 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -242,7 +242,8 @@ 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))
+#define _MMIO_PLL3(pll, ...)		_MMIO(_PICK(pll, __VA_ARGS__))
+
 
 /*
  * Device info offset array based helpers for groups of registers with unevenly
@@ -10531,6 +10532,20 @@ enum skl_power_gate {
 #define RKL_DPLL_CFGCR1(pll)		_MMIO_PLL(pll, _TGL_DPLL0_CFGCR1, \
 						  _TGL_DPLL1_CFGCR1)
 
+#define _DG1_DPLL2_CFGCR0		0x16C284
+#define _DG1_DPLL3_CFGCR0		0x16C28C
+#define DG1_DPLL_CFGCR0(pll)		_MMIO_PLL3(pll, _TGL_DPLL0_CFGCR0, \
+						   _TGL_DPLL1_CFGCR0, \
+						   _DG1_DPLL2_CFGCR0, \
+						   _DG1_DPLL3_CFGCR0)
+
+#define _DG1_DPLL2_CFGCR1               0x16C288
+#define _DG1_DPLL3_CFGCR1               0x16C290
+#define DG1_DPLL_CFGCR1(pll)            _MMIO_PLL3(pll, _TGL_DPLL0_CFGCR1, \
+						   _TGL_DPLL1_CFGCR1, \
+						   _DG1_DPLL2_CFGCR1, \
+						   _DG1_DPLL3_CFGCR1)
+
 #define _DKL_PHY1_BASE			0x168000
 #define _DKL_PHY2_BASE			0x169000
 #define _DKL_PHY3_BASE			0x16A000