[Intel-gfx] [PATCH v4 1/4] drm/i915/display/tgl+: Set default values for all registers in PIPE_MBUS_DBOX_CTL

[José Roberto de Souza]

MBUS_DBOX_B2B_TRANSACTIONS_MAX, MBUS_DBOX_B2B_TRANSACTIONS_DELAY and
MBUS_DBOX_REGULATE_B2B_TRANSACTIONS_EN were being programmed with
zeros while specification has different default values for this
registers in display 12 and newer.

While at it also converting all MBUS_DBOX macros to use REG_* macros.

BSpec: 50343
BSpec: 20231
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 13 +++++++---
 drivers/gpu/drm/i915/i915_reg.h              | 26 ++++++++++++--------
 2 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 28bfb73ae6471..234f363aad651 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1829,13 +1829,20 @@ static void icl_pipe_mbus_enable(struct intel_crtc *crtc, bool joined_mbus)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum pipe pipe = crtc->pipe;
-	u32 val;
+	u32 val = 0;
+
+	if (DISPLAY_VER(dev_priv) >= 12) {
+		val |= MBUS_DBOX_B2B_TRANSACTIONS_MAX(16);
+		val |= MBUS_DBOX_B2B_TRANSACTIONS_DELAY(1);
+		val |= MBUS_DBOX_REGULATE_B2B_TRANSACTIONS_EN;
+	}
 
 	/* Wa_22010947358:adl-p */
 	if (IS_ALDERLAKE_P(dev_priv))
-		val = joined_mbus ? MBUS_DBOX_A_CREDIT(6) : MBUS_DBOX_A_CREDIT(4);
+		val |= joined_mbus ? MBUS_DBOX_A_CREDIT(6) :
+				     MBUS_DBOX_A_CREDIT(4);
 	else
-		val = MBUS_DBOX_A_CREDIT(2);
+		val |= MBUS_DBOX_A_CREDIT(2);
 
 	if (DISPLAY_VER(dev_priv) >= 12) {
 		val |= MBUS_DBOX_BW_CREDIT(2);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index a0d652f19ff93..f47f9dfc9b0ce 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1103,16 +1103,22 @@
 #define MBUS_ABOX_BT_CREDIT_POOL1_MASK	(0x1F << 0)
 #define MBUS_ABOX_BT_CREDIT_POOL1(x)	((x) << 0)
 
-#define _PIPEA_MBUS_DBOX_CTL		0x7003C
-#define _PIPEB_MBUS_DBOX_CTL		0x7103C
-#define PIPE_MBUS_DBOX_CTL(pipe)	_MMIO_PIPE(pipe, _PIPEA_MBUS_DBOX_CTL, \
-						   _PIPEB_MBUS_DBOX_CTL)
-#define MBUS_DBOX_BW_CREDIT_MASK	(3 << 14)
-#define MBUS_DBOX_BW_CREDIT(x)		((x) << 14)
-#define MBUS_DBOX_B_CREDIT_MASK		(0x1F << 8)
-#define MBUS_DBOX_B_CREDIT(x)		((x) << 8)
-#define MBUS_DBOX_A_CREDIT_MASK		(0xF << 0)
-#define MBUS_DBOX_A_CREDIT(x)		((x) << 0)
+#define _PIPEA_MBUS_DBOX_CTL			0x7003C
+#define _PIPEB_MBUS_DBOX_CTL			0x7103C
+#define PIPE_MBUS_DBOX_CTL(pipe)		_MMIO_PIPE(pipe, _PIPEA_MBUS_DBOX_CTL, \
+							   _PIPEB_MBUS_DBOX_CTL)
+#define MBUS_DBOX_B2B_TRANSACTIONS_MAX_MASK	REG_GENMASK(24, 20)
+#define MBUS_DBOX_B2B_TRANSACTIONS_MAX(x)	REG_FIELD_PREP(MBUS_DBOX_B2B_TRANSACTIONS_MAX_MASK, x)
+#define MBUS_DBOX_B2B_TRANSACTIONS_DELAY_MASK	REG_GENMASK(19, 17)
+#define MBUS_DBOX_B2B_TRANSACTIONS_DELAY(x)	REG_FIELD_PREP(MBUS_DBOX_B2B_TRANSACTIONS_DELAY_MASK, x)
+#define MBUS_DBOX_B2B_TRANSACTIONS_DELAY_MASK	REG_GENMASK(19, 17)
+#define MBUS_DBOX_REGULATE_B2B_TRANSACTIONS_EN	REG_BIT(16)
+#define MBUS_DBOX_BW_CREDIT_MASK		REG_GENMASK(15, 14)
+#define MBUS_DBOX_BW_CREDIT(x)			REG_FIELD_PREP(MBUS_DBOX_BW_CREDIT_MASK, x)
+#define MBUS_DBOX_B_CREDIT_MASK			REG_GENMASK(12, 8)
+#define MBUS_DBOX_B_CREDIT(x)			REG_FIELD_PREP(MBUS_DBOX_B_CREDIT_MASK, x)
+#define MBUS_DBOX_A_CREDIT_MASK			REG_GENMASK(3, 0)
+#define MBUS_DBOX_A_CREDIT(x)			REG_FIELD_PREP(MBUS_DBOX_A_CREDIT_MASK, x)
 
 #define MBUS_UBOX_CTL			_MMIO(0x4503C)
 #define MBUS_BBOX_CTL_S1		_MMIO(0x45040)
-- 
2.35.1