drm/sun4i: Grab reserved memory region
Allow to provide an optional memory region to allocate from for our DRM
driver.
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 1de15cd..767bbad 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -12,6 +12,7 @@
#include <linux/component.h>
#include <linux/of_graph.h>
+#include <linux/of_reserved_mem.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
@@ -101,10 +102,16 @@ static int sun4i_drv_bind(struct device *dev)
}
drm->dev_private = drv;
+ ret = of_reserved_mem_device_init(dev);
+ if (ret && ret != -ENODEV) {
+ dev_err(drm->dev, "Couldn't claim our memory region\n");
+ goto free_drm;
+ }
+
/* drm_vblank_init calls kcalloc, which can fail */
ret = drm_vblank_init(drm, 1);
if (ret)
- goto free_drm;
+ goto free_mem_region;
drm_mode_config_init(drm);
@@ -142,6 +149,8 @@ static int sun4i_drv_bind(struct device *dev)
cleanup_mode_config:
drm_mode_config_cleanup(drm);
drm_vblank_cleanup(drm);
+free_mem_region:
+ of_reserved_mem_device_release(dev);
free_drm:
drm_dev_unref(drm);
return ret;
@@ -156,6 +165,7 @@ static void sun4i_drv_unbind(struct device *dev)
sun4i_framebuffer_free(drm);
drm_mode_config_cleanup(drm);
drm_vblank_cleanup(drm);
+ of_reserved_mem_device_release(dev);
drm_dev_unref(drm);
}