[PATCH] drm/i915/gvt: Init vreg GUC_STATUS to GS_MIA_IN_RESET

[Colin Xu]

Although GVT doesnt' support guest GuC, MIA core is still expected
to be GS_MIA_IN_RESET after uc HW reset.

Signed-off-by: Colin Xu <colin.xu at intel.com>
---
 drivers/gpu/drm/i915/gvt/mmio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/mmio.c b/drivers/gpu/drm/i915/gvt/mmio.c
index 291993615af9..b6811f6a230d 100644
--- a/drivers/gpu/drm/i915/gvt/mmio.c
+++ b/drivers/gpu/drm/i915/gvt/mmio.c
@@ -251,6 +251,9 @@ void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu, bool dmlr)
 		/* set the bit 0:2(Core C-State ) to C0 */
 		vgpu_vreg_t(vgpu, GEN6_GT_CORE_STATUS) = 0;
 
+		/* uc reset hw expect GS_MIA_IN_RESET */
+		vgpu_vreg_t(vgpu, GUC_STATUS) |= GS_MIA_IN_RESET;
+
 		if (IS_BROXTON(vgpu->gvt->gt->i915)) {
 			vgpu_vreg_t(vgpu, BXT_P_CR_GT_DISP_PWRON) &=
 				    ~(BIT(0) | BIT(1));
-- 
2.28.0