gpu: nvgpu: 3d.emc bandwidth ratio policy

Modify the 3d.emc policy to use a formula based on bandwidth and
utilization instead of the current sku-dependent policy.

Bug 1364894

Change-Id: Id97f765a48f0aa9f5ebeb0c82bccb22db474a1ae
Signed-off-by: Samuel Russell <samuelr@nvidia.com>
Reviewed-on: http://git-master/r/453586
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 9e9a94a0..0816878a 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -71,6 +71,8 @@
 
 #define GK20A_NUM_CDEVS 6
 
+#define EMC3D_DEFAULT_RATIO 750
+
 #if defined(GK20A_DEBUG)
 u32 gk20a_dbg_mask = GK20A_DEFAULT_DBG_MASK;
 u32 gk20a_dbg_ftrace;
@@ -1462,6 +1464,8 @@ static int gk20a_probe(struct platform_device *dev)
                 return err;
         }
 
+        gk20a->emc3d_ratio = EMC3D_DEFAULT_RATIO;
+
         /* Initialise scaling */
         if (IS_ENABLED(CONFIG_GK20A_DEVFREQ))
                 gk20a_scale_init(dev);