If there is no framebuffer mode that can be restored, all outputs should
be disabled in order to avoid information leaks.
Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
drivers/gpu/drm/imx/imx-drm-core.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/imx/imx-drm-core.c
b/drivers/gpu/drm/imx/imx-drm-core.c
index 82656654fb21..c63378661e11 100644
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -63,7 +63,19 @@ static void imx_drm_driver_lastclose(struct drm_device *drm)
{
struct imx_drm_device *imxdrm = drm->dev_private;
- drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
+ if (imxdrm->fbhelper) {
+ drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
+ } else {
+ struct drm_connector *connector;
+
+ /* no kernel mode to go back to, disable all outputs */
+ drm_modeset_lock_all(drm);
+ drm_for_each_connector(connector, drm)
+ connector->encoder = NULL;
+ drm_modeset_unlock_all(drm);
+
+ drm_helper_disable_unused_functions(drm);
+ }
}
static int imx_drm_driver_unload(struct drm_device *drm)
--
2.8.1
