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This update adds explanations to key functions that manage how the Kernel Fusion Driver (KFD) and Kernel Graphics Driver (KGD) share the GPU. amdgpu_gfx_enforce_isolation_wait_for_kfd: Controls the waiting period for KFD to ensure it takes turns with KGD in using the GPU. It uses a mutex to safely manage shared data, like timing and state, and tracks when KFD starts and stops waiting. amdgpu_gfx_enforce_isolation_ring_begin_use: Ensures KFD has enough time to run before new tasks are submitted to the GPU ring. It uses a mutex to synchronize access and may adjust the KFD scheduler. amdgpu_gfx_enforce_isolation_ring_end_use: Handles cleanup and state updates when finishing the use of a GPU ring. It may also adjust the KFD scheduler, using a mutex to manage shared data access. Cc: Christian König <christian.koenig@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com> Suggested-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>