1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
new file mode 100644
index 000000000000..2f469d370021
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) Rockchip Electronics Co., Ltd.
+ * Author:Mark Yao <mark.yao@rock-chips.com>
+ */
+
+#include <linux/kernel.h>
+
+#include <drm/drm.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_probe_helper.h>
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_fb.h"
+#include "rockchip_drm_gem.h"
+
+static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
+	.destroy       = drm_gem_fb_destroy,
+	.create_handle = drm_gem_fb_create_handle,
+	.dirty	       = drm_atomic_helper_dirtyfb,
+};
+
+static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
+	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
+};
+
+static struct drm_framebuffer *
+rockchip_fb_create(struct drm_device *dev, struct drm_file *file,
+		   const struct drm_format_info *info,
+		   const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct drm_afbc_framebuffer *afbc_fb;
+	int ret;
+
+	afbc_fb = kzalloc(sizeof(*afbc_fb), GFP_KERNEL);
+	if (!afbc_fb)
+		return ERR_PTR(-ENOMEM);
+
+	ret = drm_gem_fb_init_with_funcs(dev, &afbc_fb->base,
+					 file, info, mode_cmd,
+					 &rockchip_drm_fb_funcs);
+	if (ret) {
+		kfree(afbc_fb);
+		return ERR_PTR(ret);
+	}
+
+	if (drm_is_afbc(mode_cmd->modifier[0])) {
+		ret = drm_gem_fb_afbc_init(dev, info, mode_cmd, afbc_fb);
+		if (ret) {
+			drm_framebuffer_put(&afbc_fb->base);
+			return ERR_PTR(ret);
+		}
+	}
+
+	return &afbc_fb->base;
+}
+
+static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
+	.fb_create = rockchip_fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+void rockchip_drm_mode_config_init(struct drm_device *dev)
+{
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+
+	/*
+	 * set max width and height as default value(4096x4096).
+	 * this value would be used to check framebuffer size limitation
+	 * at drm_mode_addfb().
+	 */
+	dev->mode_config.max_width = 4096;
+	dev->mode_config.max_height = 4096;
+
+	dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
+	dev->mode_config.helper_private = &rockchip_mode_config_helpers;
+
+	dev->mode_config.normalize_zpos = true;
+}