Commit d6a57588 authored Dec 01, 2023 by Jiadong Zhu Committed by Alex Deucher Dec 06, 2023

drm/amdgpu: disable MCBP by default



Disable MCBP(mid command buffer preemption) by default as old Mesa
hangs with it. We shall not enable the feature that breaks old usermode
driver.

Fixes: 50a7c876 ("drm/amdgpu: enable mcbp by default on gfx9")
Signed-off-by: Jiadong Zhu <Jiadong.Zhu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

parent 33924328

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -3791,10 +3791,6 @@ static void amdgpu_device_set_mcbp(struct amdgpu_device *adev)
		adev->gfx.mcbp = true;
		else if (amdgpu_mcbp == 0)
		adev->gfx.mcbp = false;
		else if ((amdgpu_ip_version(adev, GC_HWIP, 0) >= IP_VERSION(9, 0, 0)) &&
		(amdgpu_ip_version(adev, GC_HWIP, 0) < IP_VERSION(10, 0, 0)) &&
		adev->gfx.num_gfx_rings)
		adev->gfx.mcbp = true;

		if (amdgpu_sriov_vf(adev))
		adev->gfx.mcbp = true;