5 files changed, 23 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index b8357c76..470729b7 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -1518,6 +1518,7 @@ static int gk20a_probe(struct platform_device *dev)
                                         S_IRUGO|S_IWUSR,
                                         platform->debugfs,
                                         &gk20a->mm.disable_bigpage);
+        gr_gk20a_debugfs_init(gk20a);
         gk20a_pmu_debugfs_init(dev);
         gk20a_cde_debugfs_init(dev);
 #endif
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index c310d73c..ce8d1d62 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -472,6 +472,7 @@ struct gk20a {
         struct dentry *debugfs_gr_idle_timeout_default;
         struct dentry *debugfs_bypass_smmu;
         struct dentry *debugfs_disable_bigpage;
+        struct dentry *debugfs_gr_default_attrib_cb_size;
 #endif
         struct gk20a_ctxsw_ucode_info ctxsw_ucode_info;
 
diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index d0c5da0e..78f81513 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -21,6 +21,7 @@
 #include <linux/mm.h>           /* for totalram_pages */
 #include <linux/scatterlist.h>
 #include <linux/tegra-soc.h>
+#include <linux/debugfs.h>
 #include <uapi/linux/nvgpu.h>
 #include <linux/vmalloc.h>
 #include <linux/dma-mapping.h>
@@ -54,6 +55,7 @@
 #include "dbg_gpu_gk20a.h"
 #include "debug_gk20a.h"
 #include "semaphore_gk20a.h"
+#include "platform_gk20a.h"
 
 #define BLK_SIZE (256)
 
@@ -6909,8 +6911,9 @@ static void gr_gk20a_cb_size_default(struct gk20a *g)
 {
         struct gr_gk20a *gr = &g->gr;
 
-        gr->attrib_cb_default_size =
-                gr_gpc0_ppc0_cbm_cfg_size_default_v();
+        if (!gr->attrib_cb_default_size)
+                gr->attrib_cb_default_size =
+                        gr_gpc0_ppc0_cbm_cfg_size_default_v();
         gr->alpha_cb_default_size =
                 gr_gpc0_ppc0_cbm_cfg2_size_default_v();
 }
@@ -7267,6 +7270,18 @@ static int gr_gk20a_dump_gr_status_regs(struct gk20a *g,
         return 0;
 }
 
+int gr_gk20a_debugfs_init(struct gk20a *g)
+{
+        struct gk20a_platform *platform = platform_get_drvdata(g->dev);
+
+        g->debugfs_gr_default_attrib_cb_size =
+                debugfs_create_u32("gr_default_attrib_cb_size",
+                                   S_IRUGO|S_IWUSR, platform->debugfs,
+                                   &g->gr.attrib_cb_default_size);
+
+        return 0;
+}
+
 void gk20a_init_gr_ops(struct gpu_ops *gops)
 {
         gops->gr.access_smpc_reg = gr_gk20a_access_smpc_reg;
diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.h b/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
index 1a55e064..b2213739 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
@@ -495,5 +495,6 @@ int gr_gk20a_alloc_gr_ctx(struct gk20a *g,
 void gr_gk20a_free_gr_ctx(struct gk20a *g,
                           struct vm_gk20a *vm, struct gr_ctx_desc *gr_ctx);
 int gr_gk20a_halt_pipe(struct gk20a *g);
+int gr_gk20a_debugfs_init(struct gk20a *g);
 
 #endif /*__GR_GK20A_H__*/
diff --git a/drivers/gpu/nvgpu/gm20b/gr_gm20b.c b/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
index 74761258..55a21c98 100644
--- a/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
@@ -85,8 +85,9 @@ static void gr_gm20b_cb_size_default(struct gk20a *g)
 {
         struct gr_gk20a *gr = &g->gr;
 
-        gr->attrib_cb_default_size =
-                gr_gpc0_ppc0_cbm_beta_cb_size_v_default_v();
+        if (!gr->attrib_cb_default_size)
+                gr->attrib_cb_default_size =
+                        gr_gpc0_ppc0_cbm_beta_cb_size_v_default_v();
         gr->alpha_cb_default_size =
                 gr_gpc0_ppc0_cbm_alpha_cb_size_v_default_v();
 }