drm/amdgpu: Put enable gfx off feature to a delay thread

delay to enable gfx off feature to avoid gfx on/off frequently
suggested by Alex and Evan.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 2068b7fe7523..82bc329919fe 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1925,6 +1925,19 @@ static void amdgpu_device_ip_late_init_func_handler(struct work_struct *work)
                 DRM_ERROR("ib ring test failed (%d).\n", r);
 }
 
+static void amdgpu_device_delay_enable_gfx_off(struct work_struct *work)
+{
+        struct amdgpu_device *adev =
+                container_of(work, struct amdgpu_device, gfx.gfx_off_delay_work.work);
+
+        mutex_lock(&adev->gfx.gfx_off_mutex);
+        if (!adev->gfx.gfx_off_state && !adev->gfx.gfx_off_req_count) {
+                if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, true))
+                        adev->gfx.gfx_off_state = true;
+        }
+        mutex_unlock(&adev->gfx.gfx_off_mutex);
+}
+
 /**
  * amdgpu_device_ip_suspend_phase1 - run suspend for hardware IPs (phase 1)
  *
@@ -2394,6 +2407,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 
         INIT_DELAYED_WORK(&adev->late_init_work,
                           amdgpu_device_ip_late_init_func_handler);
+        INIT_DELAYED_WORK(&adev->gfx.gfx_off_delay_work,
+                          amdgpu_device_delay_enable_gfx_off);
 
         adev->gfx.gfx_off_req_count = 1;
         adev->pm.ac_power = power_supply_is_system_supplied() > 0 ? true : false;