From: YuBiao Wang Date: Fri, 5 May 2023 06:35:32 +0000 (+0800) Subject: drm/amdgpu: set default num_kcq to 2 under sriov X-Git-Tag: v6.6.17~4420^2~12^2~659 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=db5dcd476eb0288cdfa781725582dcf9bd747a6b;p=platform%2Fkernel%2Flinux-rpi.git drm/amdgpu: set default num_kcq to 2 under sriov 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 Reviewed-by: Christian König Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index 1311e42..d0ad7cb 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,