gpu: nvgpu: Use FB reg for getting HUB MMU dbg mode

When we program MMU debug mode, we program it to both HUB and GPC
MMU. The query retrieved the value from GPC MMU, which introduces
a dependency from FB to GR. Change the code to retrieve the mode
from HUB MMU instead.

Change-Id: I6fa98e050480f7405395b7e44965defa386734d4
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1801419
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/common/fb/fb_gm20b.c b/drivers/gpu/nvgpu/common/fb/fb_gm20b.c
index 36ec21b1..5e78f636 100644
--- a/drivers/gpu/nvgpu/common/fb/fb_gm20b.c
+++ b/drivers/gpu/nvgpu/common/fb/fb_gm20b.c
@@ -202,9 +202,9 @@ void gm20b_fb_read_wpr_info(struct gk20a *g, struct wpr_carveout_info *inf)
 
 bool gm20b_fb_debug_mode_enabled(struct gk20a *g)
 {
-        u32 debug_ctrl = gk20a_readl(g, gr_gpcs_pri_mmu_debug_ctrl_r());
-        return gr_gpcs_pri_mmu_debug_ctrl_debug_v(debug_ctrl) ==
-                gr_gpcs_pri_mmu_debug_ctrl_debug_enabled_v();
+        u32 debug_ctrl = gk20a_readl(g, fb_mmu_debug_ctrl_r());
+        return fb_mmu_debug_ctrl_debug_v(debug_ctrl) ==
+                        fb_mmu_debug_ctrl_debug_enabled_v();
 }
 
 void gm20b_fb_set_debug_mode(struct gk20a *g, bool enable)