Added key register definitions of DSB.
dsb-ctrl register is required to enable dsb-engine.
head-ptr register hold the head of buffer address from where the
execution will start.
Programming tail-ptr register is a trigger point to start execution.
Cc: Uma Shankar <uma.shankar@xxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 02e1ef10c47e..71c6c2380443 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -11564,4 +11564,19 @@ enum skl_power_gate {
#define PORT_TX_DFLEXDPCSSS(fia) _MMIO_FIA((fia), 0x00894)
#define DP_PHY_MODE_STATUS_NOT_SAFE(tc_port) (1 << (tc_port))
+/* This register controls the Display State Buffer (DSB) engines. */
+#define _DSBSL_INSTANCE_BASE 0x70B00
+#define DSBSL_INSTANCE(pipe, id) (_DSBSL_INSTANCE_BASE + \
+ (pipe) * 0x1000 + (id) * 100)
+#define DSB_HEAD(pipe, id) _MMIO(DSBSL_INSTANCE(pipe, id) + 0x0)
+#define DSB_TAIL(pipe, id) _MMIO(DSBSL_INSTANCE(pipe, id) + 0x4)
+#define DSB_CTRL(pipe, id) _MMIO(DSBSL_INSTANCE(pipe, id) + 0x8)
+#define DSB_ENABLE (1 << 31)
+#define DSB_BUFFER_REITERATE (1 << 29)
+#define DSB_WAIT_FOR_VBLANK (1 << 28)
+#define DSB_WAIT_FOR_LINE_IN_RANGE (1 << 27)
+#define DSB_HALT (1 << 16)
+#define DSB_NON_POSTED_ENABLE (1 << 8)
+#define DSB_STATUS (1 << 0)
+
#endif /* _I915_REG_H_ */
--
2.22.0
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