gpu: nvgpu: cde: Allow passing shader parameters

This patch adds support to pass shader parameters through debugfs.
These parameters are required to change the shader behaviour without
reloading the firmware image.

Change-Id: Ib0ff773d9425aa9fcc58655717cccafcfbaf7bfd
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/453462
Reviewed-by: Jussi Rasanen <jrasanen@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Jussi Rasanen <jrasanen@nvidia.com>

2 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
index 46568879..2c24db85 100644
--- a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
@@ -1036,7 +1036,8 @@ static int gk20a_buffer_convert_gpu_to_cde(
         WRITE_PATCH(PATCH_USER_CONST_YTILES, ytiles);
         WRITE_PATCH(PATCH_USER_CONST_BLOCKHEIGHTLOG2, block_height_log2);
         WRITE_PATCH(PATCH_USER_CONST_DSTPITCH, dst_stride);
-        WRITE_PATCH(PATCH_USER_CONST_DSTOFFSET, transpose ? 4 : 0); /* flag */
+        WRITE_PATCH(PATCH_USER_CONST_DSTOFFSET,
+                    (transpose ? 4 : 0) | g->cde_app.shader_parameter);
         WRITE_PATCH(PATCH_VPC_CURRENT_GRID_SIZE_X, gridw);
         WRITE_PATCH(PATCH_VPC_CURRENT_GRID_SIZE_Y, gridh);
         WRITE_PATCH(PATCH_VPC_CURRENT_GRID_SIZE_Z, 1);
@@ -1208,6 +1209,8 @@ void gk20a_cde_debugfs_init(struct platform_device *dev)
         struct gk20a_platform *platform = platform_get_drvdata(dev);
         struct gk20a *g = get_gk20a(dev);
 
+        debugfs_create_u32("cde_parameter", S_IWUSR | S_IRUGO,
+                           platform->debugfs, &g->cde_app.shader_parameter);
         debugfs_create_file("reload_cde_firmware", S_IWUSR, platform->debugfs,
                             g, &gk20a_cde_reload_fops);
 }
diff --git a/drivers/gpu/nvgpu/gk20a/cde_gk20a.h b/drivers/gpu/nvgpu/gk20a/cde_gk20a.h
index 3782b44b..db583b65 100644
--- a/drivers/gpu/nvgpu/gk20a/cde_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/cde_gk20a.h
@@ -240,6 +240,8 @@ struct gk20a_cde_app {
 
         struct gk20a_cde_ctx cde_ctx[1];
         int cde_ctx_ptr;
+
+        u32 shader_parameter;
 };
 
 int gk20a_cde_destroy(struct gk20a *g);