1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
index 9b589402b58d..a99e0bca6812 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
@@ -614,6 +614,17 @@ static int amdgpu_cgs_enter_safe_mode(struct cgs_device *cgs_device,
         return 0;
 }
 
+static void amdgpu_cgs_lock_grbm_idx(struct cgs_device *cgs_device,
+                                        bool lock)
+{
+        CGS_FUNC_ADEV;
+
+        if (lock)
+                mutex_lock(&adev->grbm_idx_mutex);
+        else
+                mutex_unlock(&adev->grbm_idx_mutex);
+}
+
 static int amdgpu_cgs_get_firmware_info(struct cgs_device *cgs_device,
                                         enum cgs_ucode_id type,
                                         struct cgs_firmware_info *info)
@@ -1127,6 +1138,7 @@ static const struct cgs_ops amdgpu_cgs_ops = {
         .query_system_info = amdgpu_cgs_query_system_info,
         .is_virtualization_enabled = amdgpu_cgs_is_virtualization_enabled,
         .enter_safe_mode = amdgpu_cgs_enter_safe_mode,
+        .lock_grbm_idx = amdgpu_cgs_lock_grbm_idx,
 };
 
 static const struct cgs_os_ops amdgpu_cgs_os_ops = {