From: Mario Limonciello <mario.limonciello@xxxxxxx> The number of active surfaces is initialized to the number of active planes. If the number of planes aren't initialized properly then the last plane can end up not getting initialized which can be a divide by zero error. Reported-and-tested-by: Luke Jones <luke@xxxxxxxxxx> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3794 Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3533 Fixes: 7966f319c66d9 ("drm/amd/display: Introduce DML2") Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> --- drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c index 8dabb1ac0b684..45147b812d7d9 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c +++ b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c @@ -6787,7 +6787,7 @@ dml_bool_t dml_core_mode_support(struct display_mode_lib_st *mode_lib) } } - for (k = 0; k <= mode_lib->ms.num_active_planes - 1; k++) { + for (k = 0; k <= mode_lib->ms.num_active_planes; k++) { CalculateBytePerPixelAndBlockSizes( mode_lib->ms.cache_display_cfg.surface.SourcePixelFormat[k], mode_lib->ms.cache_display_cfg.surface.SurfaceTiling[k], -- 2.43.0
