drm/amdgpu: Fix null point error

need to check adev->powerplay.pp_funcs first, becasue from
AI, the smu ip can be disabled by user, and the pp_handle
is null in this case.

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

4 files changed, 10 insertions, 6 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
index 297a5490ad8c..0a4fba196b84 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
@@ -135,7 +135,8 @@ static int acp_poweroff(struct generic_pm_domain *genpd)
          * 2. power off the acp tiles
          * 3. check and enter ulv state
          */
-                if (adev->powerplay.pp_funcs->set_powergating_by_smu)
+                if (adev->powerplay.pp_funcs &&
+                        adev->powerplay.pp_funcs->set_powergating_by_smu)
                         amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, true);
         }
         return 0;
@@ -517,7 +518,8 @@ static int acp_set_powergating_state(void *handle,
         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
         bool enable = state == AMD_PG_STATE_GATE ? true : false;
 
-        if (adev->powerplay.pp_funcs->set_powergating_by_smu)
+        if (adev->powerplay.pp_funcs &&
+                adev->powerplay.pp_funcs->set_powergating_by_smu)
                 amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, enable);
 
         return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index 790fd5408ddf..1a656b8657f7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -392,7 +392,7 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
         if (!(adev->powerplay.pp_feature & PP_GFXOFF_MASK))
                 return;
 
-        if (!adev->powerplay.pp_funcs->set_powergating_by_smu)
+        if (!adev->powerplay.pp_funcs || !adev->powerplay.pp_funcs->set_powergating_by_smu)
                 return;
 
 
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
index 14649f8475f3..fd23ba1226a5 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
@@ -280,7 +280,7 @@ void mmhub_v1_0_update_power_gating(struct amdgpu_device *adev,
                 return;
 
         if (enable && adev->pg_flags & AMD_PG_SUPPORT_MMHUB) {
-                if (adev->powerplay.pp_funcs->set_powergating_by_smu)
+                if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->set_powergating_by_smu)
                         amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GMC, true);
 
         }
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 04fa3d972636..7a8c9172d30a 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1366,7 +1366,8 @@ static int sdma_v4_0_hw_init(void *handle)
         int r;
         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-        if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs->set_powergating_by_smu)
+        if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs &&
+                        adev->powerplay.pp_funcs->set_powergating_by_smu)
                 amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_SDMA, false);
 
         sdma_v4_0_init_golden_registers(adev);
@@ -1386,7 +1387,8 @@ static int sdma_v4_0_hw_fini(void *handle)
         sdma_v4_0_ctx_switch_enable(adev, false);
         sdma_v4_0_enable(adev, false);
 
-        if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs->set_powergating_by_smu)
+        if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs
+                        && adev->powerplay.pp_funcs->set_powergating_by_smu)
                 amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_SDMA, true);
 
         return 0;