debug_print
isp->css_env.isp_css_env.print_env.debug_print = NULL;
isp->css_env.isp_css_env.print_env.debug_print = atomisp_vprintk;
int __printf(1, 0) (*debug_print)(const char *fmt, va_list args);
sh_css_printf = env->print_env.debug_print;
#define DEBUG_PRINT_L1(...) debug_print(DEBUG_LEVEL_1_BIT, __VA_ARGS__)
#define DEBUG_PRINT_L2(...) debug_print(DEBUG_LEVEL_2_BIT, __VA_ARGS__)
#define DEBUG_PRINT_L3(...) debug_print(DEBUG_LEVEL_3_BIT, __VA_ARGS__)
#define DEBUG_PRINT_L4(...) debug_print(DEBUG_LEVEL_4_BIT, __VA_ARGS__)
#define DEBUG_PRINT_T(...) debug_print(DEBUG_TIMING_BIT, __VA_ARGS__)