[PATCH] drm/amdgpu: Enable SDMA utilization for Arcturus

[Mukul Joshi]

SDMA utilization calculations are enabled/disabled by
writing to SDMAx_PUB_DUMMY_REG2 register. Currently,
enable this only for Arcturus.

Signed-off-by: Mukul Joshi <mukul.joshi at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 856c50386c86..c764c27ba86d 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1063,6 +1063,16 @@ static void sdma_v4_0_ctx_switch_enable(struct amdgpu_device *adev, bool enable)
 			WREG32_SDMA(i, mmSDMA0_PHASE2_QUANTUM, phase_quantum);
 		}
 		WREG32_SDMA(i, mmSDMA0_CNTL, f32_cntl);
+
+		/*
+		 * Enable SDMA utilization. Its only supported on
+		 * Arcturus for the moment and firmware version 14
+		 * and above.
+		 */
+		if ((adev->asic_type == CHIP_ARCTURUS) &&
+			(adev->sdma.instance[i].fw_version > 13)) {
+			WREG32_SDMA(i, mmSDMA0_PUB_DUMMY_REG2, enable);
+		}
 	}
 
 }
-- 
2.17.1