[Intel-gfx] [PATCH 1/2] drm/i915/display/rkl: Implement WA 14011471926

[José Roberto de Souza]

This WA fixes failures on DP and HDMI links in PHY B.

For the PHY verification step, it is always returning false as this is
a temporary workaround so not bothering with minimal drawbacks in
programing phy B registers everytime for non-production HW.

BSpec: 49291
BSpec: 53273
Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 .../gpu/drm/i915/display/intel_combo_phy.c    | 33 +++++++++++++++++++
 drivers/gpu/drm/i915/i915_reg.h               | 17 ++++++++--
 2 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c b/drivers/gpu/drm/i915/display/intel_combo_phy.c
index 77b04bb3ec62..9eba6e59fff3 100644
--- a/drivers/gpu/drm/i915/display/intel_combo_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
@@ -264,6 +264,10 @@ static bool icl_combo_phy_verify_state(struct drm_i915_private *dev_priv,
 	if (!icl_combo_phy_enabled(dev_priv, phy))
 		return false;
 
+	/* WA 14011471926 */
+	if (IS_RKL_REVID(dev_priv, RKL_REVID_A0, RKL_REVID_B0) && phy == PHY_B)
+		return false;
+
 	ret = cnl_verify_procmon_ref_values(dev_priv, phy);
 
 	if (phy_is_master(dev_priv, phy)) {
@@ -390,6 +394,35 @@ 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);
+
+		/* WA 14011471926 */
+		if (IS_RKL_REVID(dev_priv, RKL_REVID_A0, RKL_REVID_B0) &&
+		    phy == PHY_B) {
+			u32 grccode;
+
+			intel_de_wait_for_register(dev_priv,
+						   ICL_PORT_COMP_DW3(PHY_A),
+						   FIRST_COMP_DONE,
+						   FIRST_COMP_DONE, 1);
+
+			val = intel_de_read(dev_priv, ICL_PORT_COMP_DW6(PHY_A));
+			grccode = REG_FIELD_GET(ICL_PORT_COMP_DW6_GRCCODE_MASK, val);
+
+			val = intel_de_read(dev_priv, ICL_PORT_COMP_DW2(phy));
+			val &= ~ICL_PORT_COMP_DW2_IREF_RCAL_ORD_MASK;
+			val |= REG_FIELD_PREP(ICL_PORT_COMP_DW2_IREF_RCAL_ORD_MASK, grccode);
+			val |= ICL_PORT_COMP_DW2_IREF_RCAL_ORD_END;
+			intel_de_write(dev_priv, ICL_PORT_COMP_DW2(phy), val);
+
+			val = intel_de_read(dev_priv, ICL_PORT_COMP_DW0(PHY_A));
+			grccode = REG_FIELD_GET(ICL_PORT_COMP_DW0_GRCCODE_LDO_MASK, val);
+
+			val = intel_de_read(dev_priv, ICL_PORT_COMP_DW6(phy));
+			val &= ~ICL_PORT_COMP_DW6_RCOMPCODE_LD_CAP_OV_MASK;
+			val |= REG_FIELD_PREP(ICL_PORT_COMP_DW6_RCOMPCODE_LD_CAP_OV_MASK, grccode);
+			val |= ICL_PORT_COMP_DW6_RCOMPCODEOVEN_LDO_SYNC;
+			intel_de_write(dev_priv, ICL_PORT_COMP_DW6(phy), val);
+		}
 	}
 }
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f09120cac89a..dbbe20a38345 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1907,13 +1907,18 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define _ICL_PORT_COMP_DW(dw, phy)	(_ICL_COMBOPHY(phy) + \
 					 _ICL_PORT_COMP + 4 * (dw))
 
-#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 CNL_PORT_COMP_DW0			_MMIO(0x162100)
+#define ICL_PORT_COMP_DW0(phy)			_MMIO(_ICL_PORT_COMP_DW(0, phy))
+#define   COMP_INIT				REG_BIT(31)
+#define   ICL_PORT_COMP_DW0_GRCCODE_LDO_MASK	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   ICL_PORT_COMP_DW2_IREF_RCAL_ORD_END	REG_BIT(7)
+#define   ICL_PORT_COMP_DW2_IREF_RCAL_ORD_MASK	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		(1 << 22)
+
+#define ICL_PORT_COMP_DW6(phy)				_MMIO(_ICL_PORT_COMP_DW(6, phy))
+#define   ICL_PORT_COMP_DW6_GRCCODE_MASK		REG_GENMASK(30, 24)
+#define   ICL_PORT_COMP_DW6_RCOMPCODEOVEN_LDO_SYNC	REG_BIT(23)
+#define   ICL_PORT_COMP_DW6_RCOMPCODE_LD_CAP_OV_MASK	REG_GENMASK(22, 16)
 
 #define ICL_PORT_COMP_DW8(phy)		_MMIO(_ICL_PORT_COMP_DW(8, phy))
 #define   IREFGEN			(1 << 24)
-- 
2.27.0