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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 <drm/drm.h>
- #include <drm/drm_fb_helper.h>
- #include <drm/drm_fourcc.h>
- #include <drm/drm_probe_helper.h>
- #include "rockchip_drm_drv.h"
- #include "rockchip_drm_gem.h"
- #include "rockchip_drm_fb.h"
- #include "rockchip_drm_fbdev.h"
- #define PREFERRED_BPP 32
- #define to_drm_private(x) \
- container_of(x, struct rockchip_drm_private, fbdev_helper)
- static int rockchip_fbdev_mmap(struct fb_info *info,
- struct vm_area_struct *vma)
- {
- struct drm_fb_helper *helper = info->par;
- struct rockchip_drm_private *private = to_drm_private(helper);
- return rockchip_gem_mmap_buf(private->fbdev_bo, vma);
- }
- static const struct fb_ops rockchip_drm_fbdev_ops = {
- .owner = THIS_MODULE,
- DRM_FB_HELPER_DEFAULT_OPS,
- .fb_mmap = rockchip_fbdev_mmap,
- .fb_fillrect = drm_fb_helper_cfb_fillrect,
- .fb_copyarea = drm_fb_helper_cfb_copyarea,
- .fb_imageblit = drm_fb_helper_cfb_imageblit,
- };
- static int rockchip_drm_fbdev_create(struct drm_fb_helper *helper,
- struct drm_fb_helper_surface_size *sizes)
- {
- struct rockchip_drm_private *private = to_drm_private(helper);
- struct drm_mode_fb_cmd2 mode_cmd = { 0 };
- struct drm_device *dev = helper->dev;
- struct rockchip_gem_object *rk_obj;
- struct drm_framebuffer *fb;
- unsigned int bytes_per_pixel;
- unsigned long offset;
- struct fb_info *fbi;
- size_t size;
- int ret;
- bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
- mode_cmd.width = sizes->surface_width;
- mode_cmd.height = sizes->surface_height;
- mode_cmd.pitches[0] = sizes->surface_width * bytes_per_pixel;
- mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
- sizes->surface_depth);
- size = mode_cmd.pitches[0] * mode_cmd.height;
- rk_obj = rockchip_gem_create_object(dev, size, true);
- if (IS_ERR(rk_obj))
- return -ENOMEM;
- private->fbdev_bo = &rk_obj->base;
- fbi = drm_fb_helper_alloc_fbi(helper);
- if (IS_ERR(fbi)) {
- DRM_DEV_ERROR(dev->dev, "Failed to create framebuffer info.\n");
- ret = PTR_ERR(fbi);
- goto out;
- }
- helper->fb = rockchip_drm_framebuffer_init(dev, &mode_cmd,
- private->fbdev_bo);
- if (IS_ERR(helper->fb)) {
- DRM_DEV_ERROR(dev->dev,
- "Failed to allocate DRM framebuffer.\n");
- ret = PTR_ERR(helper->fb);
- goto out;
- }
- fbi->fbops = &rockchip_drm_fbdev_ops;
- fb = helper->fb;
- drm_fb_helper_fill_info(fbi, helper, sizes);
- offset = fbi->var.xoffset * bytes_per_pixel;
- offset += fbi->var.yoffset * fb->pitches[0];
- dev->mode_config.fb_base = 0;
- fbi->screen_base = rk_obj->kvaddr + offset;
- fbi->screen_size = rk_obj->base.size;
- fbi->fix.smem_len = rk_obj->base.size;
- DRM_DEBUG_KMS("FB [%dx%d]-%d kvaddr=%p offset=%ld size=%zu\n",
- fb->width, fb->height, fb->format->depth,
- rk_obj->kvaddr,
- offset, size);
- return 0;
- out:
- rockchip_gem_free_object(&rk_obj->base);
- return ret;
- }
- static const struct drm_fb_helper_funcs rockchip_drm_fb_helper_funcs = {
- .fb_probe = rockchip_drm_fbdev_create,
- };
- int rockchip_drm_fbdev_init(struct drm_device *dev)
- {
- struct rockchip_drm_private *private = dev->dev_private;
- struct drm_fb_helper *helper;
- int ret;
- if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
- return -EINVAL;
- helper = &private->fbdev_helper;
- drm_fb_helper_prepare(dev, helper, &rockchip_drm_fb_helper_funcs);
- ret = drm_fb_helper_init(dev, helper);
- if (ret < 0) {
- DRM_DEV_ERROR(dev->dev,
- "Failed to initialize drm fb helper - %d.\n",
- ret);
- return ret;
- }
- ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
- if (ret < 0) {
- DRM_DEV_ERROR(dev->dev,
- "Failed to set initial hw config - %d.\n",
- ret);
- goto err_drm_fb_helper_fini;
- }
- return 0;
- err_drm_fb_helper_fini:
- drm_fb_helper_fini(helper);
- return ret;
- }
- void rockchip_drm_fbdev_fini(struct drm_device *dev)
- {
- struct rockchip_drm_private *private = dev->dev_private;
- struct drm_fb_helper *helper;
- helper = &private->fbdev_helper;
- drm_fb_helper_unregister_fbi(helper);
- if (helper->fb)
- drm_framebuffer_put(helper->fb);
- drm_fb_helper_fini(helper);
- }
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