drm/i915: add SBI registers

Those are responsible for the Sideband Interface programming.

v2: rename SBI bits to better reflect their meaning

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index a87f41c..542128c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4116,4 +4116,16 @@
                                        DDI_BUF_TRANS_A, \
                                        DDI_BUF_TRANS_B)
 
+/* Sideband Interface (SBI) is programmed indirectly, via
+ * SBI_ADDR, which contains the register offset; and SBI_DATA,
+ * which contains the payload */
+#define SBI_ADDR                               0xC6000
+#define SBI_DATA                               0xC6004
+#define SBI_CTL_STAT                   0xC6008
+#define  SBI_CTL_OP_CRRD               (0x6<<8)
+#define  SBI_CTL_OP_CRWR               (0x7<<8)
+#define  SBI_RESPONSE_FAIL             (0x1<<1)
+#define  SBI_RESPONSE_SUCCESS  (0x0<<1)
+#define  SBI_BUSY                              (0x1<<0)
+#define  SBI_READY                             (0x0<<0)
 #endif /* _I915_REG_H_ */