gpu: nvgpu: Disable only channel at zcull bind

At zcull bind we disable whole GR engine. This is unnecessary, so
instead disable only the channel and make sure it's unloaded.

Introduces also an API in fifo_gk20a.c to do the channel disable.

gr_gk20a_ctx_zcull_setup() was always passed true as last parameter,
so remove parameter.

Change-Id: I7ae6e101ec7d1ab3f6ee4e9bcc442d23dbd21247
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/787570

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index b5e8ce9c..1cf90fbf 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -222,6 +222,7 @@ struct gpu_ops {
                 void (*bind_channel)(struct channel_gk20a *ch_gk20a);
                 void (*unbind_channel)(struct channel_gk20a *ch_gk20a);
                 void (*disable_channel)(struct channel_gk20a *ch);
+                void (*enable_channel)(struct channel_gk20a *ch);
                 int (*alloc_inst)(struct gk20a *g, struct channel_gk20a *ch);
                 void (*free_inst)(struct gk20a *g, struct channel_gk20a *ch);
                 int (*setup_ramfc)(struct channel_gk20a *c, u64 gpfifo_base,