gpu: nvgpu: gv11b: skip clk gating prog for pre-si

For pre-silicon platforms, clock gating
should be skipped as it is not supported.
Added new flags "can_"x"lcg" to check platform
capability before programming SLCG,BLCG and ELCG.

Bug 200314250

Change-Id: Iec7564b00b988cdd50a02f3130662727839c5047
Signed-off-by: Deepak Goyal <dgoyal@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1566251
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/gr_gv11b.c b/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
index f209012c..da632aac 100644
--- a/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
@@ -2352,6 +2352,9 @@ void gr_gv11b_init_elcg_mode(struct gk20a *g, u32 mode, u32 engine)
 {
         u32 gate_ctrl;
 
+        if (!nvgpu_is_enabled(g, NVGPU_GPU_CAN_ELCG))
+                return;
+
         gate_ctrl = gk20a_readl(g, therm_gate_ctrl_r(engine));
 
         switch (mode) {