How can i enable CONFIG_ROCKCHIP_TSP=y when building kernel？

#1

I open CONFIG_ROCKCHIP_TSP=y,when building kernel，but get the error:
drivers/media/platform/rockchip-tsp/rockchip_tsp.c:43:10: fatal error: linux/rk_tsp_api.h: No such file or directory
#include <linux/rk_tsp_api.h>
^~~~~~~~~~~~~~~~~~~~
compilation terminated.
scripts/Makefile.build:277: recipe for target ‘drivers/media/platform/rockchip-tsp/rockchip_tsp.o’ failed

how can i get linux/rk_tsp_api.h?

#2

TSP is not supported by ROCK Pi E.

#3

ok, I know, thanks!