[3/4] drm/msm/a3xx: set interconnect bandwidth vote
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Message ID 20191117114825.13541-4-masneyb@onstation.org
State New
Headers show
Series
  • drm/msm/gpu: add support for ocmem interconnect
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Commit Message

Brian Masney Nov. 17, 2019, 11:48 a.m. UTC
Set the two interconnect paths for the GPU to maximum speed for now to
work towards getting the GPU working upstream. We can revisit a later
time to optimize this for battery life.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 8 ++++++++
 1 file changed, 8 insertions(+)

Patch
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diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
index 07ddcc529573..f05adf9bc752 100644
--- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
@@ -504,6 +504,14 @@  struct msm_gpu *a3xx_gpu_init(struct drm_device *dev)
 		DRM_DEV_ERROR(dev->dev, "No memory protection without IOMMU\n");
 	}
 
+	/*
+	 * Set the ICC path to maximum speed for now by multiplying the fastest
+	 * frequency by the bus width (8). We'll want to scale this later on to
+	 * improve battery life.
+	 */
+	icc_set_bw(gpu->gfx_mem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8);
+	icc_set_bw(gpu->ocmem_icc_path, 0, Bps_to_icc(gpu->fast_rate) * 8);
+
 	return gpu;
 
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