[PATCH] drm/amdgpu/gfx8: Add serdes wait for idle in CGCG en/disable

[Alex Deucher]

From: Tom St Denis <tom.stde...@amd.com>

Must wait for SERDES idle before exiting RLC SAFEMODE

Signed-off-by: Tom St Denis <tom.stdenis at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 494104e..b78fdbe 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -5780,6 +5780,8 @@ static void 
gfx_v8_0_update_coarse_grain_clock_gating(struct amdgpu_device *adev
                        WREG32(mmRLC_CGCG_CGLS_CTRL, data);
        }

+       gfx_v8_0_wait_for_rlc_serdes(adev);
+
        adev->gfx.rlc.funcs->exit_safe_mode(adev);
 }
 static int gfx_v8_0_update_gfx_clock_gating(struct amdgpu_device *adev,
-- 
2.5.5