[Intel-gfx] [PATCH] drm/i915/display: Program DBUF_CTL tracker state service

[José Roberto de Souza]

This sequence is not part of "Sequences to Initialize Display" but
as noted in the MBus page the DBUF_CTL.Tracker_state_service needs
to be set to 8.

BSpec: 49213
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_power.c | 13 +++++++++++++
 drivers/gpu/drm/i915/i915_reg.h                    | 14 +++++++++-----
 2 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 45806cfc679a..db36ab02e7d7 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -4771,6 +4771,17 @@ static void gen9_dbuf_disable(struct drm_i915_private *dev_priv)
 	gen9_dbuf_slices_update(dev_priv, 0);
 }
 
+static void gen12_dbuf_slices_config(struct drm_i915_private *dev_priv)
+{
+	const int num_slices = INTEL_INFO(dev_priv)->num_supported_dbuf_slices;
+	enum dbuf_slice slice;
+
+	for (slice = DBUF_S1; slice < num_slices; slice++)
+		intel_de_rmw(dev_priv, DBUF_CTL_S(slice),
+			     DBUF_TRACKER_STATE_SERVICE_MASK,
+			     DBUF_TRACKER_STATE_SERVICE(8));
+}
+
 static void icl_mbus_init(struct drm_i915_private *dev_priv)
 {
 	unsigned long abox_regs = INTEL_INFO(dev_priv)->abox_mask;
@@ -5340,6 +5351,8 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
 	/* 4. Enable CDCLK. */
 	intel_cdclk_init_hw(dev_priv);
 
+	if (INTEL_GEN(dev_priv) >= 12)
+		gen12_dbuf_slices_config(dev_priv);
 	/* 5. Enable DBUF. */
 	gen9_dbuf_enable(dev_priv);
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 6d97e6286c2d..c38901e2f81c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7927,11 +7927,15 @@ enum {
 #define DISP_ARB_CTL2	_MMIO(0x45004)
 #define  DISP_DATA_PARTITION_5_6	(1 << 6)
 #define  DISP_IPC_ENABLE		(1 << 3)
-#define _DBUF_CTL_S1			0x45008
-#define _DBUF_CTL_S2			0x44FE8
-#define DBUF_CTL_S(slice)		_MMIO(_PICK_EVEN(slice, _DBUF_CTL_S1, _DBUF_CTL_S2))
-#define  DBUF_POWER_REQUEST		(1 << 31)
-#define  DBUF_POWER_STATE		(1 << 30)
+
+#define _DBUF_CTL_S1				0x45008
+#define _DBUF_CTL_S2				0x44FE8
+#define DBUF_CTL_S(slice)			_MMIO(_PICK_EVEN(slice, _DBUF_CTL_S1, _DBUF_CTL_S2))
+#define  DBUF_POWER_REQUEST			REG_BIT(31)
+#define  DBUF_POWER_STATE			REG_BIT(30)
+#define  DBUF_TRACKER_STATE_SERVICE_MASK	REG_GENMASK(23, 19)
+#define  DBUF_TRACKER_STATE_SERVICE(x)		REG_FIELD_PREP(DBUF_TRACKER_STATE_SERVICE_MASK, x)
+
 #define GEN7_MSG_CTL	_MMIO(0x45010)
 #define  WAIT_FOR_PCH_RESET_ACK		(1 << 1)
 #define  WAIT_FOR_PCH_FLR_ACK		(1 << 0)
-- 
2.28.0