gpu: nvgpu: Support 512 channels in gm20b

Retrieve channel count from gm20b specific header instead of the
gk20a header. This increases channel count from 128 to 512.

Change-Id: I96d4887432852795f7f526e33f0d3d2458f3af0e
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/500623

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 83c4e147..ae640277 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -189,6 +189,7 @@ struct gpu_ops {
                                 unsigned long engine_ids);
                 void (*apply_pb_timeout)(struct gk20a *g);
                 int (*wait_engine_idle)(struct gk20a *g);
+                u32 (*get_num_fifos)(struct gk20a *g);
         } fifo;
         struct pmu_v {
                 /*used for change of enum zbc update cmd id from ver 0 to ver1*/