gpu: nvgpu: Initialize hwpm perfmons (engine_sel)

- For Mode-E ctxsw it is required that engine_sel
is set to 0xFFFFFFFF.
- Default 0 is a valid signal and causes problems.

Bug 2106999

Change-Id: I5cdb4441a8e6d7e8133c31a9e361b54611dd2995
Signed-off-by: Vaibhav Kachore <vkachore@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1770755
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index 3f49fbf7..c70c1cd4 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -1782,6 +1782,11 @@ int gr_gk20a_update_hwpm_ctxsw_mode(struct gk20a *g,
                                 return -ENOMEM;
                         }
                 }
+
+                if (mode == NVGPU_DBG_HWPM_CTXSW_MODE_STREAM_OUT_CTXSW &&
+                                g->ops.gr.init_hwpm_pmm_register) {
+                        g->ops.gr.init_hwpm_pmm_register(g);
+                }
         }
 
         data = nvgpu_mem_rd(g, gr_mem, ctxsw_prog_main_image_pm_o());