drm/sun4i: Implement drm_driver lastclose to restore fbdev console

The drm_driver lastclose callback is called when the last userspace
DRM client has closed. Call drm_fbdev_cma_restore_mode to restore
the fbdev console otherwise the fbdev console will stop working.

Fixes: 9026e0d122ac ("drm: Add Allwinner A10 Display Engine support")
Cc: stable@vger.kernel.org
Tested-by: Olliver Schinagl <oliver@schinagl.nl>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index abc7d8fe06b450084bcd20ec560b62405415ff40..a45a627283a149c79693ec90dbd9da5fd8f42056 100644 (file)
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -25,12 +25,20 @@
 #include "sun4i_framebuffer.h"
 #include "sun4i_tcon.h"
 
+static void sun4i_drv_lastclose(struct drm_device *dev)
+{
+       struct sun4i_drv *drv = dev->dev_private;
+
+       drm_fbdev_cma_restore_mode(drv->fbdev);
+}
+
 DEFINE_DRM_GEM_CMA_FOPS(sun4i_drv_fops);
 
 static struct drm_driver sun4i_drv_driver = {
        .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
 
        /* Generic Operations */
+       .lastclose              = sun4i_drv_lastclose,
        .fops                   = &sun4i_drv_fops,
        .name                   = "sun4i-drm",
        .desc                   = "Allwinner sun4i Display Engine",