164 строки
4.1 KiB
C
164 строки
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
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* Author:Mark Yao <mark.yao@rock-chips.com>
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*/
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#include <drm/drm.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_probe_helper.h>
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#include "rockchip_drm_drv.h"
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#include "rockchip_drm_gem.h"
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#include "rockchip_drm_fb.h"
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#include "rockchip_drm_fbdev.h"
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#define PREFERRED_BPP 32
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#define to_drm_private(x) \
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container_of(x, struct rockchip_drm_private, fbdev_helper)
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static int rockchip_fbdev_mmap(struct fb_info *info,
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struct vm_area_struct *vma)
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{
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struct drm_fb_helper *helper = info->par;
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struct rockchip_drm_private *private = to_drm_private(helper);
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return rockchip_gem_mmap_buf(private->fbdev_bo, vma);
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}
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static const struct fb_ops rockchip_drm_fbdev_ops = {
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.owner = THIS_MODULE,
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DRM_FB_HELPER_DEFAULT_OPS,
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.fb_mmap = rockchip_fbdev_mmap,
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.fb_fillrect = drm_fb_helper_cfb_fillrect,
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.fb_copyarea = drm_fb_helper_cfb_copyarea,
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.fb_imageblit = drm_fb_helper_cfb_imageblit,
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};
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static int rockchip_drm_fbdev_create(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct rockchip_drm_private *private = to_drm_private(helper);
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struct drm_mode_fb_cmd2 mode_cmd = { 0 };
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struct drm_device *dev = helper->dev;
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struct rockchip_gem_object *rk_obj;
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struct drm_framebuffer *fb;
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unsigned int bytes_per_pixel;
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unsigned long offset;
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struct fb_info *fbi;
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size_t size;
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int ret;
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bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
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mode_cmd.width = sizes->surface_width;
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mode_cmd.height = sizes->surface_height;
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mode_cmd.pitches[0] = sizes->surface_width * bytes_per_pixel;
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mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = mode_cmd.pitches[0] * mode_cmd.height;
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rk_obj = rockchip_gem_create_object(dev, size, true);
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if (IS_ERR(rk_obj))
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return -ENOMEM;
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private->fbdev_bo = &rk_obj->base;
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fbi = drm_fb_helper_alloc_fbi(helper);
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if (IS_ERR(fbi)) {
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DRM_DEV_ERROR(dev->dev, "Failed to create framebuffer info.\n");
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ret = PTR_ERR(fbi);
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goto out;
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}
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helper->fb = rockchip_drm_framebuffer_init(dev, &mode_cmd,
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private->fbdev_bo);
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if (IS_ERR(helper->fb)) {
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DRM_DEV_ERROR(dev->dev,
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"Failed to allocate DRM framebuffer.\n");
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ret = PTR_ERR(helper->fb);
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goto out;
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}
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fbi->fbops = &rockchip_drm_fbdev_ops;
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fb = helper->fb;
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drm_fb_helper_fill_info(fbi, helper, sizes);
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offset = fbi->var.xoffset * bytes_per_pixel;
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offset += fbi->var.yoffset * fb->pitches[0];
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dev->mode_config.fb_base = 0;
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fbi->screen_base = rk_obj->kvaddr + offset;
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fbi->screen_size = rk_obj->base.size;
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fbi->fix.smem_len = rk_obj->base.size;
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DRM_DEBUG_KMS("FB [%dx%d]-%d kvaddr=%p offset=%ld size=%zu\n",
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fb->width, fb->height, fb->format->depth,
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rk_obj->kvaddr,
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offset, size);
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return 0;
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out:
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rockchip_gem_free_object(&rk_obj->base);
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return ret;
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}
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static const struct drm_fb_helper_funcs rockchip_drm_fb_helper_funcs = {
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.fb_probe = rockchip_drm_fbdev_create,
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};
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int rockchip_drm_fbdev_init(struct drm_device *dev)
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{
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struct rockchip_drm_private *private = dev->dev_private;
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struct drm_fb_helper *helper;
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int ret;
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if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
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return -EINVAL;
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helper = &private->fbdev_helper;
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drm_fb_helper_prepare(dev, helper, &rockchip_drm_fb_helper_funcs);
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ret = drm_fb_helper_init(dev, helper);
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if (ret < 0) {
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DRM_DEV_ERROR(dev->dev,
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"Failed to initialize drm fb helper - %d.\n",
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ret);
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return ret;
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}
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ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
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if (ret < 0) {
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DRM_DEV_ERROR(dev->dev,
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"Failed to set initial hw config - %d.\n",
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ret);
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goto err_drm_fb_helper_fini;
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}
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return 0;
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err_drm_fb_helper_fini:
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drm_fb_helper_fini(helper);
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return ret;
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}
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void rockchip_drm_fbdev_fini(struct drm_device *dev)
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{
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struct rockchip_drm_private *private = dev->dev_private;
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struct drm_fb_helper *helper;
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helper = &private->fbdev_helper;
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drm_fb_helper_unregister_fbi(helper);
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if (helper->fb)
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drm_framebuffer_put(helper->fb);
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drm_fb_helper_fini(helper);
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}
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