1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_framebuffer.c b/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
new file mode 100644
index 000000000..260136d60
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_blend.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+
+#include "sun4i_drv.h"
+#include "sun4i_framebuffer.h"
+
+static int sun4i_de_atomic_check(struct drm_device *dev,
+				 struct drm_atomic_state *state)
+{
+	int ret;
+
+	ret = drm_atomic_helper_check_modeset(dev, state);
+	if (ret)
+		return ret;
+
+	ret = drm_atomic_normalize_zpos(dev, state);
+	if (ret)
+		return ret;
+
+	return drm_atomic_helper_check_planes(dev, state);
+}
+
+static const struct drm_mode_config_funcs sun4i_de_mode_config_funcs = {
+	.atomic_check		= sun4i_de_atomic_check,
+	.atomic_commit		= drm_atomic_helper_commit,
+	.fb_create		= drm_gem_fb_create,
+};
+
+static const struct drm_mode_config_helper_funcs sun4i_de_mode_config_helpers = {
+	.atomic_commit_tail	= drm_atomic_helper_commit_tail_rpm,
+};
+
+void sun4i_framebuffer_init(struct drm_device *drm)
+{
+	drm_mode_config_reset(drm);
+
+	drm->mode_config.max_width = 8192;
+	drm->mode_config.max_height = 8192;
+
+	drm->mode_config.funcs = &sun4i_de_mode_config_funcs;
+	drm->mode_config.helper_private = &sun4i_de_mode_config_helpers;
+}