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

[ Upstream commit 8ef23364b654d44244400d79988e677e504b21ba ]

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

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Hang Zhou <hang.zhou@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 564362e..c8a5cf5 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -5551,6 +5551,11 @@ static int gfx_v8_0_set_powergating_state(void *handle,
        if (!(adev->pg_flags & AMD_PG_SUPPORT_GFX_PG))
                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:
@@ -5586,7 +5591,11 @@ 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;
 }