gpu: nvgpu: gv11b: ltc reset seqeunce change

Access ltc registers only after bringing ltc
out reset. Earlier ltc bought out of reset in
fb_reset which is later than accessing ltc registers.

GPUT19X-70

Change-Id: Id3b0ac4ed8787a994b7a5848598e4989154a0940
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/1495167
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/ltc_gv11b.c b/drivers/gpu/nvgpu/gv11b/ltc_gv11b.c
index 5b98b0aa..38986382 100644
--- a/drivers/gpu/nvgpu/gv11b/ltc_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/ltc_gv11b.c
@@ -22,6 +22,7 @@
 #include <nvgpu/hw/gv11b/hw_ltc_gv11b.h>
 #include <nvgpu/hw/gv11b/hw_mc_gv11b.h>
 #include <nvgpu/hw/gv11b/hw_top_gv11b.h>
+#include <nvgpu/hw/gv11b/hw_mc_gv11b.h>
 #include <nvgpu/hw/gv11b/hw_pri_ringmaster_gv11b.h>
 
 /*
@@ -49,6 +50,13 @@ static void gv11b_ltc_init_fs_state(struct gk20a *g)
 
         gk20a_dbg_info("initialize gv11b l2");
 
+        g->ops.mc.reset(g, mc_enable_pfb_enabled_f() |
+                                mc_enable_l2_enabled_f());
+
+        reg = gk20a_readl(g, mc_elpg_enable_r());
+        reg |= mc_elpg_enable_l2_enabled_f();
+        gk20a_writel(g, mc_elpg_enable_r(), reg);
+
         g->max_ltc_count = gk20a_readl(g, top_num_ltcs_r());
         g->ltc_count = gk20a_readl(g, pri_ringmaster_enum_ltc_r());
         gk20a_dbg_info("%u ltcs out of %u", g->ltc_count, g->max_ltc_count);