4 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
index 2c24db85..63a1a590 100644
--- a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
@@ -321,6 +321,9 @@ static int gk20a_cde_patch_params(struct gk20a_cde_ctx *cde_ctx)
                         if (new_data == 0)
                                 err = -EINVAL;
                         break;
+                case TYPE_PARAM_BACKINGSTORE_BASE_HW:
+                        new_data = g->gr.compbit_store.base_hw;
+                        break;
                 default:
                         user_id = param->id - NUM_RESERVED_PARAMS;
                         if (user_id < 0 || user_id >= MAX_CDE_USER_PARAMS)
diff --git a/drivers/gpu/nvgpu/gk20a/cde_gk20a.h b/drivers/gpu/nvgpu/gk20a/cde_gk20a.h
index db583b65..9569f436 100644
--- a/drivers/gpu/nvgpu/gk20a/cde_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/cde_gk20a.h
@@ -119,6 +119,7 @@ enum {
         TYPE_PARAM_DESTINATION_SIZE,
         TYPE_PARAM_BACKINGSTORE_SIZE,
         TYPE_PARAM_SOURCE_SMMU_ADDR,
+        TYPE_PARAM_BACKINGSTORE_BASE_HW,
         NUM_RESERVED_PARAMS = 1024,
 };
 
diff --git a/drivers/gpu/nvgpu/gk20a/ltc_common.c b/drivers/gpu/nvgpu/gk20a/ltc_common.c
index 2d611d48..b4e3fc75 100644
--- a/drivers/gpu/nvgpu/gk20a/ltc_common.c
+++ b/drivers/gpu/nvgpu/gk20a/ltc_common.c
@@ -261,6 +261,8 @@ static void gk20a_ltc_init_cbc(struct gk20a *g, struct gr_gk20a *gr)
                    (u32)(compbit_store_base_iova & 0xffffffff),
                    compbit_base_post_divide);
 
+        gr->compbit_store.base_hw = compbit_base_post_divide;
+
         g->ops.ltc.cbc_ctrl(g, gk20a_cbc_op_invalidate,
                             0, max_comptag_lines - 1);
 
diff --git a/drivers/gpu/nvgpu/gk20a/mm_gk20a.h b/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
index df64d2ca..da19f83e 100644
--- a/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
@@ -172,6 +172,10 @@ struct compbit_store_desc {
         struct sg_table *sgt;
         size_t size;
         u64 base_iova;
+
+        /* The value that is written to the hardware. This depends on
+         * on the number of ltcs and is not an address. */
+        u64 base_hw;
 };
 
 struct gk20a_buffer_state {