linux-kernel - [PATCH AUTOSEL 4.18 46/56] drm/amdgpu: Enable/disable gfx PG feature in rlc safe mode

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Message-ID: <20180920024716.58490-46-alexander.levin@microsoft.com>
Date:   Thu, 20 Sep 2018 02:48:00 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Rex Zhu <Rex.Zhu@....com>, Hang Zhou <hang.zhou@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 46/56] drm/amdgpu: Enable/disable gfx PG feature
 in rlc safe mode

From: Rex Zhu <Rex.Zhu@....com>

[ 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@....com>
Signed-off-by: Hang Zhou <hang.zhou@....com>
Signed-off-by: Rex Zhu <Rex.Zhu@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.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 818874b13c99..9057a5adb31b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -5614,6 +5614,11 @@ 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:
@@ -5663,7 +5668,11 @@ 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;
 }
 
-- 
2.17.1