gpu: nvgpu: Make LTC disabling common code

Refactor the sync_debugfs LTC HAL op so that the logic to enable
or disable LTC goes to common code nvgpu_ltc_sync_enabled() and
the LTC HAL set_enabled only performs the hardware register access.

Create a new common function nvgpu_init_ltc_support() to initialize
the LTC software variable, and move hardware initialization of LTC to
be called from it.

JIRA NVGPU-62

Change-Id: Ib1cf4f5b83ca3dac08407464ed56a732e0a33923
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1528262
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 6 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/debug.c b/drivers/gpu/nvgpu/common/linux/debug.c
index e085aed4..a846493e 100644
--- a/drivers/gpu/nvgpu/common/linux/debug.c
+++ b/drivers/gpu/nvgpu/common/linux/debug.c
@@ -275,15 +275,10 @@ void gk20a_debug_init(struct gk20a *g, const char *debugfs_symlink)
         debugfs_create_u32("log_trace", S_IRUGO|S_IWUSR,
                 platform->debugfs, &g->log_trace);
 
-        nvgpu_spinlock_init(&g->debugfs_lock);
-
-        g->mm.ltc_enabled = true;
-        g->mm.ltc_enabled_debug = true;
-
         g->debugfs_ltc_enabled =
                         debugfs_create_bool("ltc_enabled", S_IRUGO|S_IWUSR,
                                  platform->debugfs,
-                                 &g->mm.ltc_enabled_debug);
+                                 &g->mm.ltc_enabled_target);
 
         g->debugfs_gr_idle_timeout_default =
                         debugfs_create_u32("gr_idle_timeout_default_us",