gpu: nvgpu: cde: move GK20A_CDE to platform data

CONFIG_GK20A_CDE has not even been used for enabling CDE, just for
initializing it at boot time, and it was disabled; initialization has
been done late when the engine is first used. Remove the config
setting and add information about CDE support in gk20a platform data,
forcing the initialization at boot time. Boot time init removes rare
race conditions when CDE would be initialized by first user.

Bug 200046882

Change-Id: I85d5fb73dc27acbbe203138d25f6e342de030d93
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/562855
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 19 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
index 22a422a3..d9fe9ef1 100644
--- a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
@@ -879,16 +879,8 @@ int gk20a_cde_reload(struct gk20a *g)
         struct gk20a_cde_ctx *cde_ctx = cde_app->cde_ctx;
         int err, i;
 
-        if (!cde_app->initialised) {
-                err = gk20a_busy(g->dev);
-                if (err)
-                        return err;
-                gk20a_init_cde_support(g);
-                gk20a_idle(g->dev);
-                if (!cde_app->initialised)
-                        return -ENOSYS;
-                return 0;
-        }
+        if (!cde_app->initialised)
+                return -ENOSYS;
 
         err = gk20a_busy(g->dev);
         if (err)
@@ -1044,11 +1036,8 @@ static int gk20a_buffer_convert_gpu_to_cde(
         const int gridw = roundup(xtiles, xalign) / xalign;
         const int gridh = roundup(ytiles, yalign) / yalign;
 
-        if (!g->cde_app.initialised) {
-                err = gk20a_cde_reload(g);
-                if (err)
-                        return err;
-        }
+        if (!g->cde_app.initialised)
+                return -ENOSYS;
 
         if (xtiles > 4096 / 8 || ytiles > 4096 / 8)
                 gk20a_warn(&g->dev->dev, "cde: surface is exceptionally large (xtiles=%d, ytiles=%d)",
@@ -1087,16 +1076,12 @@ static int gk20a_buffer_convert_gpu_to_cde(
         err = gk20a_busy(g->dev);
         if (err)
                 return err;
-        err = gk20a_init_cde_support(g);
-        if (err)
-                goto out;
         err = gk20a_cde_convert(g, dmabuf,
                                 0, /* dst kind */
                                 compbits_offset,
                                 0, /* dst_size, 0 = auto */
                                 fence_in, submit_flags,
                                 params, param, fence_out);
-out:
         gk20a_idle(g->dev);
         return err;
 }