gpu: nvgpu: Support ZBC color tracking

The compression state tracking user space API already accepts and
returns the ZBC color used for the surface. Actually store the color
in kernel so that the feature works.

Bug 1536227
Bug 1524301

Change-Id: I264e1eeb90f0c4d40fe35fc2479b0ce83e19a7d7
Signed-off-by: Lauri Peltonen <lpeltonen@nvidia.com>
Reviewed-on: http://git-master/r/497476
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Tested-by: Jussi Rasanen <jrasanen@nvidia.com>
Reviewed-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/mm_gk20a.h b/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
index f06c465a..89a2108b 100644
--- a/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
@@ -192,6 +192,9 @@ struct gk20a_buffer_state {
         /* A bitmask of valid sets of compbits (0 = uncompressed). */
         u32 valid_compbits;
 
+        /* The ZBC color used on this buffer. */
+        u32 zbc_color;
+
         /* This struct reflects the state of the buffer when this
          * fence signals. */
         struct gk20a_fence *fence;