[PATCH] drm/amdgpu: set default num_kcq to 2 under sriov

[YuBiao Wang]

The number of kernel queues has impact on the latency under sriov
usecase. So to reduce the latency we set the default num_kcq = 2 under
sriov if not set manually.

Signed-off-by: YuBiao Wang <yubiao.w...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index 1311e42ab8e9..d0ad7cb0fa05 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -68,6 +68,9 @@ void amdgpu_virt_init_setting(struct amdgpu_device *adev)
        /* enable mcbp for sriov */
        amdgpu_mcbp = 1;
 
+       /* Reduce kcq number to 2 to reduce latency */
+       if (amdgpu_num_kcq == -1)
+               amdgpu_num_kcq = 2;
 }
 
 void amdgpu_virt_kiq_reg_write_reg_wait(struct amdgpu_device *adev,
-- 
2.25.1