[PATCH] drm/amdgpu: Stop clearing kiq position during fini

[Yaoyao Lei]

Do not clear kiq position in RLC_CP_SCHEDULER so that CP could perform
IDLE-SAVE after VF fini.
Otherwise it could cause GFX hang if another Win guest is rendering.

Signed-off-by: Yaoyao Lei <yaoyao.lei at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 6983acc456b2..073f5f23bc3b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -7285,17 +7285,9 @@ static int gfx_v10_0_hw_fini(void *handle)
 
 	if (amdgpu_sriov_vf(adev)) {
 		gfx_v10_0_cp_gfx_enable(adev, false);
-		/* Program KIQ position of RLC_CP_SCHEDULERS during destroy */
-		if (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(10, 3, 0)) {
-			tmp = RREG32_SOC15(GC, 0, mmRLC_CP_SCHEDULERS_Sienna_Cichlid);
-			tmp &= 0xffffff00;
-			WREG32_SOC15(GC, 0, mmRLC_CP_SCHEDULERS_Sienna_Cichlid, tmp);
-		} else {
-			tmp = RREG32_SOC15(GC, 0, mmRLC_CP_SCHEDULERS);
-			tmp &= 0xffffff00;
-			WREG32_SOC15(GC, 0, mmRLC_CP_SCHEDULERS, tmp);
-		}
-
+		/* Remove the steps of clearing KIQ position.
+		 * It causes GFX hang when another Win guest is rendering.
+		 */
 		return 0;
 	}
 	gfx_v10_0_cp_enable(adev, false);
-- 
2.25.1