From: Deepak Rawat Date: Wed, 20 Jun 2018 11:23:55 +0200 Subject: drm/vmwgfx: Perform memory validations only when need full modeset. Git-commit: 7e14eabca82ec75da5200769989d396da46033ee Patch-mainline: v4.19-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 For cases when full modeset is not requested like page-flip, skip memory validation as the topology is not changed. Signed-off-by: Deepak Rawat Reviewed-by: Thomas Hellstrom Signed-off-by: Thomas Hellstrom Acked-by: Petr Tesarik --- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -1670,13 +1670,32 @@ static int vmw_kms_atomic_check_modeset(struct drm_device *dev, struct drm_atomic_state *state) { - int ret; + struct drm_crtc *crtc; + struct drm_crtc_state *crtc_state; + bool need_modeset = false; + int i, ret; ret = drm_atomic_helper_check(dev, state); if (ret) return ret; - return vmw_kms_check_topology(dev, state); + if (!state->allow_modeset) + return ret; + + /* + * Legacy path do not set allow_modeset properly like + * @drm_atomic_helper_update_plane, This will result in unnecessary call + * to vmw_kms_check_topology. So extra set of check. + */ + for_each_new_crtc_in_state(state, crtc, crtc_state, i) { + if (drm_atomic_crtc_needs_modeset(crtc_state)) + need_modeset = true; + } + + if (need_modeset) + return vmw_kms_check_topology(dev, state); + + return ret; } static const struct drm_mode_config_funcs vmw_kms_funcs = {