drm/amdgpu/vcn: improve vcn dpg stop procedure

[ 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@amd.com>
Signed-off-by: Tianci Yin <tianci.yin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
index 54b405f..6e56bef 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
@@ -1508,8 +1508,11 @@ 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);