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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (C) Fuzhou 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_fb_helper.h>
- #include <drm/drm_fourcc.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 struct drm_framebuffer *
- rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
- struct drm_gem_object **obj, unsigned int num_planes)
- {
- struct drm_framebuffer *fb;
- int ret;
- int i;
- fb = kzalloc(sizeof(*fb), GFP_KERNEL);
- if (!fb)
- return ERR_PTR(-ENOMEM);
- drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
- for (i = 0; i < num_planes; i++)
- fb->obj[i] = obj[i];
- ret = drm_framebuffer_init(dev, fb, &rockchip_drm_fb_funcs);
- if (ret) {
- DRM_DEV_ERROR(dev->dev,
- "Failed to initialize framebuffer: %d\n",
- ret);
- kfree(fb);
- return ERR_PTR(ret);
- }
- return fb;
- }
- 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_mode_fb_cmd2 *mode_cmd)
- {
- struct drm_afbc_framebuffer *afbc_fb;
- const struct drm_format_info *info;
- int ret;
- info = drm_get_format_info(dev, mode_cmd);
- if (!info)
- return ERR_PTR(-ENOMEM);
- 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, mode_cmd,
- &rockchip_drm_fb_funcs);
- if (ret) {
- kfree(afbc_fb);
- return ERR_PTR(ret);
- }
- if (drm_is_afbc(mode_cmd->modifier[0])) {
- int ret, i;
- ret = drm_gem_fb_afbc_init(dev, mode_cmd, afbc_fb);
- if (ret) {
- struct drm_gem_object **obj = afbc_fb->base.obj;
- for (i = 0; i < info->num_planes; ++i)
- drm_gem_object_put(obj[i]);
- kfree(afbc_fb);
- 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,
- .output_poll_changed = drm_fb_helper_output_poll_changed,
- .atomic_check = drm_atomic_helper_check,
- .atomic_commit = drm_atomic_helper_commit,
- };
- struct drm_framebuffer *
- rockchip_drm_framebuffer_init(struct drm_device *dev,
- const struct drm_mode_fb_cmd2 *mode_cmd,
- struct drm_gem_object *obj)
- {
- struct drm_framebuffer *fb;
- fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
- if (IS_ERR(fb))
- return ERR_CAST(fb);
- return fb;
- }
- 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;
- }
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