drm/amdgpu/vcn: improve vcn dpg stop procedure

stable inclusion
from stable-v5.10.112
commit e5afacc826a80cd82ac3f9eb26bc80e45cd14c20
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5HL0X

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e5afacc826a80cd82ac3f9eb26bc80e45cd14c20

--------------------------------

[ Upstream commit 6ea239ad ]

Prior to disabling dpg, VCN need unpausing dpg mode, or VCN will hang in
S3 resuming.
Reviewed-by: NJames Zhu <James.Zhu@amd.com>
Signed-off-by: NTianci Yin <tianci.yin@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c

@@ -1429,8 +1429,11 @@ 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);