[PATCH] drm/amdgpu: Enable/disable gfx PG feature in rlc safe mode

[Deucher, Alexander]

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

________________________________
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Rex Zhu <Rex.Zhu at amd.com>
Sent: Friday, August 24, 2018 5:32:22 AM
To: Zhou, Hang; amd-gfx at lists.freedesktop.org
Cc: Zhu, Rex
Subject: [PATCH] drm/amdgpu: Enable/disable gfx PG feature in rlc safe mode

This is required by gfx hw and can fix the rlc hang when
do s3 stree test on Cz/St.

Signed-off-by: Hang Zhou <hang.zhou at amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 903725ba..a2acd76 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -5618,6 +5618,11 @@ static int gfx_v8_0_set_powergating_state(void *handle,
         if (amdgpu_sriov_vf(adev))
                 return 0;

+       if (adev->pg_flags & (AMD_PG_SUPPORT_GFX_SMG |
+                               AMD_PG_SUPPORT_RLC_SMU_HS |
+                               AMD_PG_SUPPORT_CP |
+                               AMD_PG_SUPPORT_GFX_DMG))
+               adev->gfx.rlc.funcs->enter_safe_mode(adev);
         switch (adev->asic_type) {
         case CHIP_CARRIZO:
         case CHIP_STONEY:
@@ -5667,7 +5672,11 @@ static int gfx_v8_0_set_powergating_state(void *handle,
         default:
                 break;
         }
-
+       if (adev->pg_flags & (AMD_PG_SUPPORT_GFX_SMG |
+                               AMD_PG_SUPPORT_RLC_SMU_HS |
+                               AMD_PG_SUPPORT_CP |
+                               AMD_PG_SUPPORT_GFX_DMG))
+               adev->gfx.rlc.funcs->exit_safe_mode(adev);
         return 0;
 }

--
1.9.1

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