drm/i915/gvt: add sprite plane flip done support.

* Add flip done event support for sprite plane on SKL platform.
* Fix bug #1452, "Call Trace:handle_default_event_virt+0xef/0x100
[i915]" while booting up guest.
Signed-off-by: Xu Han <xu.han@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

drivers/gpu/drm/i915/gvt/cmd_parser.c

@@ -1135,6 +1135,8 @@ static int skl_decode_mi_display_flip(struct parser_exec_state *s,
 	u32 dword2 = cmd_val(s, 2);
 	u32 plane = (dword0 & GENMASK(12, 8)) >> 8;
 
+	info->plane = PRIMARY_PLANE;
+
 	switch (plane) {
 	case MI_DISPLAY_FLIP_SKL_PLANE_1_A:
 		info->pipe = PIPE_A;
@@ -1148,12 +1150,28 @@ static int skl_decode_mi_display_flip(struct parser_exec_state *s,
 		info->pipe = PIPE_C;
 		info->event = PRIMARY_C_FLIP_DONE;
 		break;
+
+	case MI_DISPLAY_FLIP_SKL_PLANE_2_A:
+		info->pipe = PIPE_A;
+		info->event = SPRITE_A_FLIP_DONE;
+		info->plane = SPRITE_PLANE;
+		break;
+	case MI_DISPLAY_FLIP_SKL_PLANE_2_B:
+		info->pipe = PIPE_B;
+		info->event = SPRITE_B_FLIP_DONE;
+		info->plane = SPRITE_PLANE;
+		break;
+	case MI_DISPLAY_FLIP_SKL_PLANE_2_C:
+		info->pipe = PIPE_C;
+		info->event = SPRITE_C_FLIP_DONE;
+		info->plane = SPRITE_PLANE;
+		break;
+
 	default:
 		gvt_err("unknown plane code %d\n", plane);
 		return -EINVAL;
 	}
 
-	info->pipe = PRIMARY_PLANE;
 	info->stride_val = (dword1 & GENMASK(15, 6)) >> 6;
 	info->tile_val = (dword1 & GENMASK(2, 0));
 	info->surf_val = (dword2 & GENMASK(31, 12)) >> 12;

drivers/gpu/drm/i915/gvt/interrupt.c

@@ -588,6 +588,10 @@ static void gen8_init_irq(
 		SET_BIT_INFO(irq, 3, PRIMARY_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
 		SET_BIT_INFO(irq, 3, PRIMARY_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
 		SET_BIT_INFO(irq, 3, PRIMARY_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
+
+		SET_BIT_INFO(irq, 4, SPRITE_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
+		SET_BIT_INFO(irq, 4, SPRITE_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
+		SET_BIT_INFO(irq, 4, SPRITE_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
 	}
 
 	/* GEN8 interrupt PCU events */