linux-kernel - [PATCH AUTOSEL 5.17 11/49] drm/amdgpu/vcn: improve vcn dpg stop procedure

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Date:   Mon, 11 Apr 2022 20:43:29 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Tianci Yin <tianci.yin@....com>, James Zhu <James.Zhu@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...ux.ie, daniel@...ll.ch,
        leo.liu@....com, andrey.grodzovsky@....com, ruijing.dong@....com,
        veerabadhran.gopalakrishnan@....com, PengJu.Zhou@....com,
        Bokun.Zhang@....com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.17 11/49] drm/amdgpu/vcn: improve vcn dpg stop procedure

From: Tianci Yin <tianci.yin@....com>

[ Upstream commit 6ea239adc2a712eb318f04f5c29b018ba65ea38a ]

Prior to disabling dpg, VCN need unpausing dpg mode, or VCN will hang in
S3 resuming.

Reviewed-by: James Zhu <James.Zhu@....com>
Signed-off-by: Tianci Yin <tianci.yin@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
index da11ceba0698..2ae56b2ed318 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
@@ -1474,8 +1474,11 @@ static int vcn_v3_0_start_sriov(struct amdgpu_device *adev)
 
 static int vcn_v3_0_stop_dpg_mode(struct amdgpu_device *adev, int inst_idx)
 {
+	struct dpg_pause_state state = {.fw_based = VCN_DPG_STATE__UNPAUSE};
 	uint32_t tmp;
 
+	vcn_v3_0_pause_dpg_mode(adev, 0, &state);
+
 	/* Wait for power status to be 1 */
 	SOC15_WAIT_ON_RREG(VCN, inst_idx, mmUVD_POWER_STATUS, 1,
 		UVD_POWER_STATUS__UVD_POWER_STATUS_MASK);
-- 
2.35.1