gpu: nvgpu: Ensure memory subsystem is enabled

Ensure that memory subsystem is enabled at init.

Bug 1603128

Change-Id: Ie3fcd4d9df4dbd480e44fa8919fc311e61b627ca
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/707027
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fb_gk20a.c b/drivers/gpu/nvgpu/gk20a/fb_gk20a.c
index 568aed7a..b73be02a 100644
--- a/drivers/gpu/nvgpu/gk20a/fb_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fb_gk20a.c
@@ -22,12 +22,20 @@
 
 static void fb_gk20a_reset(struct gk20a *g)
 {
+        u32 val;
+
         gk20a_dbg_info("reset gk20a fb");
 
         gk20a_reset(g, mc_enable_pfb_enabled_f()
                         | mc_enable_l2_enabled_f()
                         | mc_enable_xbar_enabled_f()
                         | mc_enable_hub_enabled_f());
+
+        val = gk20a_readl(g, mc_elpg_enable_r());
+        val |= mc_elpg_enable_xbar_enabled_f()
+                | mc_elpg_enable_pfb_enabled_f()
+                | mc_elpg_enable_hub_enabled_f();
+        gk20a_writel(g, mc_elpg_enable_r(), val);
 }
 
 static void gk20a_fb_set_mmu_page_size(struct gk20a *g)