drm/i915/dg1: map/unmap pll clocks

DG1 uses 2 registers for the ddi clock mapping, with PHY A and B using
DPCLKA_CFGCR0 and PHY C and D using DPCLKA1_CFGCR0. Hide this behind a
single macro that chooses the correct register according to the phy
being accessed, use the correct bitfields for each pll/phy and implement
separate functions for DG1 since it doesn't share much with ICL/TGL
anymore.

The previous values were correct for PHY A and B since they were using
the same register as before and the bitfields were matching.

v2: Add comment and try to simplify DG1_DPCLKA* macros by reusing
previous ones
v3:
  - Fix DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK() after wrong macro reuse
  - Move phy -> id map to a separate macro (Aditya)
  - Remove DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK where not required
    (Aditya)
  - Use drm_WARN_ON

Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Clinton Taylor <Clinton.A.Taylor@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Aditya Swarup <aditya.swarup@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Aditya Swarup <aditya.swarup@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201106210006.837953-1-lucas.demarchi@intel.com

1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index bb0656875697..39664ba553ec 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -230,12 +230,14 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define _TRANS(tran, a, b)		_PICK_EVEN(tran, a, b)
 #define _PORT(port, a, b)		_PICK_EVEN(port, a, b)
 #define _PLL(pll, a, b)			_PICK_EVEN(pll, a, b)
+#define _PHY(phy, a, b)			_PICK_EVEN(phy, a, b)
 
 #define _MMIO_PIPE(pipe, a, b)		_MMIO(_PIPE(pipe, a, b))
 #define _MMIO_PLANE(plane, a, b)	_MMIO(_PLANE(plane, a, b))
 #define _MMIO_TRANS(tran, a, b)		_MMIO(_TRANS(tran, a, b))
 #define _MMIO_PORT(port, a, b)		_MMIO(_PORT(port, a, b))
 #define _MMIO_PLL(pll, a, b)		_MMIO(_PLL(pll, a, b))
+#define _MMIO_PHY(phy, a, b)		_MMIO(_PHY(phy, a, b))
 
 #define _PHY3(phy, ...)			_PICK(phy, __VA_ARGS__)
 
@@ -10300,6 +10302,7 @@ enum skl_power_gate {
 #define  DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port)	(3 << DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port))
 #define  DPCLKA_CFGCR0_DDI_CLK_SEL(pll, port)	((pll) << DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port))
 
+/* ICL Clocks */
 #define ICL_DPCLKA_CFGCR0			_MMIO(0x164280)
 #define  ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)	(1 << _PICK(phy, 10, 11, 24))
 #define  RKL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)	REG_BIT((phy) + 10)
@@ -10315,6 +10318,27 @@ enum skl_power_gate {
 #define  RKL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll, phy) \
 	((pll) << RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
 
+/*
+ * DG1 Clocks
+ * First registers controls the first A and B, while the second register
+ * controls the phy C and D. The bits on these registers are the
+ * same, but refer to different phys
+ */
+#define _DG1_DPCLKA_CFGCR0				0x164280
+#define _DG1_DPCLKA1_CFGCR0				0x16C280
+#define _DG1_DPCLKA_PHY_IDX(phy)			((phy) % 2)
+#define _DG1_DPCLKA_PLL_IDX(pll)			((pll) % 2)
+#define _DG1_PHY_DPLL_MAP(phy)				((phy) >= PHY_C ? DPLL_ID_DG1_DPLL2 : DPLL_ID_DG1_DPLL0)
+#define DG1_DPCLKA_CFGCR0(phy)				_MMIO_PHY((phy) / 2, \
+								  _DG1_DPCLKA_CFGCR0, \
+								  _DG1_DPCLKA1_CFGCR0)
+#define   DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)		REG_BIT(_DG1_DPCLKA_PHY_IDX(phy) + 10)
+#define   DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy)	(_DG1_DPCLKA_PHY_IDX(phy) * 2)
+#define   DG1_DPCLKA_CFGCR0_DDI_CLK_SEL(pll, phy)	(_DG1_DPCLKA_PLL_IDX(pll) << DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
+#define   DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy)	(0x3 << DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
+#define   DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_DPLL_MAP(clk_sel, phy) \
+	(((clk_sel) >> DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy)) + _DG1_PHY_DPLL_MAP(phy))
+
 /* CNL PLL */
 #define DPLL0_ENABLE		0x46010
 #define DPLL1_ENABLE		0x46014