After doing normal PHY-B initialization on Rocket Lake, we need to
manually copy some additional PHY-A register values into PHY-B
registers.
Note that the bspec's combo phy page doesn't specify that this
workaround is restricted to specific platform steppings (and doesn't
even do a very good job of specifying that RKL is the only platform this
is needed on), but the RKL workaround page lists this as relevant only
for A and B steppings, so I'm trusting that information for now.
Bspec: 49291
Bspec: 53273
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
.../gpu/drm/i915/display/intel_combo_phy.c | 26 +++++++++++++++++++
drivers/gpu/drm/i915/i915_reg.h | 13 +++++++++-
2 files changed, 38 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c b/drivers/gpu/drm/i915/display/intel_combo_phy.c
index 77b04bb3ec62..53a1b49e305a 100644
--- a/drivers/gpu/drm/i915/display/intel_combo_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
@@ -338,6 +338,27 @@ void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
intel_de_write(dev_priv, ICL_PORT_CL_DW10(phy), val);
}
+void rkl_combo_phy_b_init_wa(struct drm_i915_private *i915)
+{
+ u32 grccode, grccode_ldo;
+ u32 iref_rcal_ord, rcompcode_ld_cap_ov;
+
+ intel_de_wait_for_register(i915, ICL_PORT_COMP_DW3(PHY_A),
+ FIRST_COMP_DONE, FIRST_COMP_DONE, 100);
+
+ grccode = REG_FIELD_GET(GRCCODE,
+ intel_de_read(i915, ICL_PORT_COMP_DW6(PHY_A)));
+ iref_rcal_ord = REG_FIELD_PREP(IREF_RCAL_ORD, grccode);
+ intel_de_rmw(i915, ICL_PORT_COMP_DW2(PHY_B), IREF_RCAL_ORD,
+ iref_rcal_ord | IREF_RCAL_ORD_EN);
+
+ grccode_ldo = REG_FIELD_GET(GRCCODE_LDO,
+ intel_de_read(i915, ICL_PORT_COMP_DW0(PHY_A)));
+ rcompcode_ld_cap_ov = REG_FIELD_PREP(RCOMPCODE_LD_CAP_OV, grccode_ldo);
+ intel_de_rmw(i915, ICL_PORT_COMP_DW6(PHY_B), RCOMPCODE_LD_CAP_OV,
+ rcompcode_ld_cap_ov | RCOMPCODEOVEN_LDO_SYNC);
+}
+
static void icl_combo_phys_init(struct drm_i915_private *dev_priv)
{
enum phy phy;
@@ -390,6 +411,11 @@ static void icl_combo_phys_init(struct drm_i915_private *dev_priv)
val = intel_de_read(dev_priv, ICL_PORT_CL_DW5(phy));
val |= CL_POWER_DOWN_ENABLE;
intel_de_write(dev_priv, ICL_PORT_CL_DW5(phy), val);
+
+ if (IS_RKL_REVID(dev_priv, RKL_REVID_A0, RKL_REVID_B0) &&
+ phy == PHY_B)
+ /* Wa_14011224835:rkl[a0..c0] */
+ rkl_combo_phy_b_init_wa(dev_priv);
}
}
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 90f11517f656..9c0d0ca14664 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1909,11 +1909,16 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
#define CNL_PORT_COMP_DW0 _MMIO(0x162100)
#define ICL_PORT_COMP_DW0(phy) _MMIO(_ICL_PORT_COMP_DW(0, phy))
-#define COMP_INIT (1 << 31)
+#define COMP_INIT REG_BIT(31)
+#define GRCCODE_LDO REG_GENMASK(7, 0)
#define CNL_PORT_COMP_DW1 _MMIO(0x162104)
#define ICL_PORT_COMP_DW1(phy) _MMIO(_ICL_PORT_COMP_DW(1, phy))
+#define ICL_PORT_COMP_DW2(phy) _MMIO(_ICL_PORT_COMP_DW(2, phy))
+#define IREF_RCAL_ORD_EN REG_BIT(7)
+#define IREF_RCAL_ORD REG_GENMASK(6, 0)
+
#define CNL_PORT_COMP_DW3 _MMIO(0x16210c)
#define ICL_PORT_COMP_DW3(phy) _MMIO(_ICL_PORT_COMP_DW(3, phy))
#define PROCESS_INFO_DOT_0 (0 << 26)
@@ -1926,6 +1931,12 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
#define VOLTAGE_INFO_1_05V (2 << 24)
#define VOLTAGE_INFO_MASK (3 << 24)
#define VOLTAGE_INFO_SHIFT 24
+#define FIRST_COMP_DONE REG_BIT(22)
+
+#define ICL_PORT_COMP_DW6(phy) _MMIO(_ICL_PORT_COMP_DW(6, phy))
+#define GRCCODE REG_GENMASK(30, 24)
+#define RCOMPCODEOVEN_LDO_SYNC REG_BIT(23)
+#define RCOMPCODE_LD_CAP_OV REG_GENMASK(22, 16)
#define ICL_PORT_COMP_DW8(phy) _MMIO(_ICL_PORT_COMP_DW(8, phy))
#define IREFGEN (1 << 24)
--
2.24.1
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