diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c index 33807d746e76..c9f47d167472 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c @@ -47,6 +47,25 @@ static DEFINE_PER_CPU(int, fpu_recursion_depth); /** + * dc_assert_fp_enabled - Check if FPU protection is enabled + * + * This function tells if the code is already under FPU protection or not. A + * function that works as an API for a set of FPU operations can use this + * function for checking if the caller invoked it after DC_FP_START(). For + * example, take a look at dcn2x.c file. + */ +inline void dc_assert_fp_enabled(void) +{ + int *pcpu, depth = 0; + + pcpu = get_cpu_ptr(&fpu_recursion_depth); + depth = *pcpu; + put_cpu_ptr(&fpu_recursion_depth); + + ASSERT(depth > 1); +} + +/** * dc_fpu_begin - Enables FPU protection * @function_name: A string containing the function name for debug purposes * (usually __func__) |