linux-kernel - [PATCH AUTOSEL 6.1 21/24] drm/amdgpu: add mes resume when do gfx post soft reset

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Date:   Fri, 31 Mar 2023 21:42:37 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Tong Liu01 <Tong.Liu01@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch,
        Hawking.Zhang@....com, tim.huang@....com, yifan1.zhang@....com,
        Likun.Gao@....com, kenneth.feng@....com, mario.limonciello@....com,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.1 21/24] drm/amdgpu: add mes resume when do gfx post soft reset

From: Tong Liu01 <Tong.Liu01@....com>

[ Upstream commit 4eb0b49a0ad3e004a6a65b84efe37bc7e66d560f ]

[why]
when gfx do soft reset, mes will also do reset, if mes is not
resumed when do recover from soft reset, mes is unable to respond
in later sequence

[how]
resume mes when do gfx post soft reset

Signed-off-by: Tong Liu01 <Tong.Liu01@....com>
Acked-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index 90e739d9aeee7..7a13129842602 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -4625,6 +4625,14 @@ static bool gfx_v11_0_check_soft_reset(void *handle)
 	return false;
 }
 
+static int gfx_v11_0_post_soft_reset(void *handle)
+{
+	/**
+	 * GFX soft reset will impact MES, need resume MES when do GFX soft reset
+	 */
+	return amdgpu_mes_resume((struct amdgpu_device *)handle);
+}
+
 static uint64_t gfx_v11_0_get_gpu_clock_counter(struct amdgpu_device *adev)
 {
 	uint64_t clock;
@@ -6068,6 +6076,7 @@ static const struct amd_ip_funcs gfx_v11_0_ip_funcs = {
 	.wait_for_idle = gfx_v11_0_wait_for_idle,
 	.soft_reset = gfx_v11_0_soft_reset,
 	.check_soft_reset = gfx_v11_0_check_soft_reset,
+	.post_soft_reset = gfx_v11_0_post_soft_reset,
 	.set_clockgating_state = gfx_v11_0_set_clockgating_state,
 	.set_powergating_state = gfx_v11_0_set_powergating_state,
 	.get_clockgating_state = gfx_v11_0_get_clockgating_state,
-- 
2.39.2