drm/fsl-dcu: implement lastclose callback

Use CMA helper drm_fbdev_cma_restore_mode to restore fbdev mode
in process which uses drm/kms dies.

Signed-off-by: Stefan Agner <stefan@agner.ch>

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
index f9227b7..ef41bde 100644 (file)
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -168,6 +168,13 @@ static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
        regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
 }
 
+static void fsl_dcu_drm_lastclose(struct drm_device *dev)
+{
+       struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+
+       drm_fbdev_cma_restore_mode(fsl_dev->fbdev);
+}
+
 static const struct file_operations fsl_dcu_drm_fops = {
        .owner          = THIS_MODULE,
        .open           = drm_open,
@@ -185,6 +192,7 @@ static const struct file_operations fsl_dcu_drm_fops = {
 static struct drm_driver fsl_dcu_drm_driver = {
        .driver_features        = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
                                | DRIVER_PRIME | DRIVER_ATOMIC,
+       .lastclose              = fsl_dcu_drm_lastclose,
        .load                   = fsl_dcu_load,
        .unload                 = fsl_dcu_unload,
        .irq_handler            = fsl_dcu_drm_irq,