From 906786c20038bc453e28269db74878962046039f Mon Sep 17 00:00:00 2001
From: Nirmoy Das <nirmoy.das@amd.com>
Date: Fri, 13 Mar 2020 15:26:54 +0100
Subject: drm/amdgpu: disable gpu_sched load balancer for vcn jobs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: 4ff7d8ba4c80b8198bd4a0cc339373eb28540552
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
VCN HW doesn't support dynamic load balance on multiple instances
for a context. This patch initializes VNC entities with only one
drm_gpu_scheduler picked by drm_sched_pick_best(). Picking a
drm_gpu_scheduler using drm_sched_pick_best() ensures that we
do load balance among multiple contexts but not among multiple
jobs in a context.
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 74c795a5e187..6ed36a2c5f73 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -121,12 +121,16 @@ static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, const u32 hw_ip, const
num_scheds = 1;
break;
case AMDGPU_HW_IP_VCN_DEC:
- scheds = adev->vcn.vcn_dec_sched;
- num_scheds = adev->vcn.num_vcn_dec_sched;
+ sched = drm_sched_pick_best(adev->vcn.vcn_dec_sched,
+ adev->vcn.num_vcn_dec_sched);
+ scheds = &sched;
+ num_scheds = 1;
break;
case AMDGPU_HW_IP_VCN_ENC:
- scheds = adev->vcn.vcn_enc_sched;
- num_scheds = adev->vcn.num_vcn_enc_sched;
+ sched = drm_sched_pick_best(adev->vcn.vcn_enc_sched,
+ adev->vcn.num_vcn_enc_sched);
+ scheds = &sched;
+ num_scheds = 1;
break;
case AMDGPU_HW_IP_VCN_JPEG:
scheds = adev->jpeg.jpeg_sched;
--
2.28.0