[PATCH 1/3] drm/amdgpu/ring: add no_scheduler flag

[Alex Deucher]

This allows IPs to flag whether a specific ring requires
a GPU scheduler or not.  E.g., sometimes instances of an
IP are asymmetric and have different capabilities.

Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 3 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index 5f36bd58202a..4863e91c5533 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -261,7 +261,8 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 	mutex_init(&ring->priority_mutex);
 
 	if (ring->funcs->type >= AMDGPU_RING_TYPE_GFX &&
-	    ring->funcs->type <= AMDGPU_RING_TYPE_VCN_JPEG) {
+	    ring->funcs->type <= AMDGPU_RING_TYPE_VCN_JPEG &&
+	    !ring->no_scheduler) {
 		hw_ip = ring->funcs->type;
 		num_sched = &adev->gpu_sched[hw_ip][hw_prio].num_scheds;
 		adev->gpu_sched[hw_ip][hw_prio].sched[(*num_sched)++] =
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index efd7627b3f69..f61664ee4940 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
@@ -238,6 +238,7 @@ struct amdgpu_ring {
 	unsigned		vm_inv_eng;
 	struct dma_fence	*vmid_wait;
 	bool			has_compute_vm_bug;
+	bool			no_scheduler;
 
 	atomic_t		num_jobs[DRM_SCHED_PRIORITY_MAX];
 	struct mutex		priority_mutex;
-- 
2.25.2