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/*
* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
* Author:Mark Yao <mark.yao@rock-chips.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <drm/drm.h>
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include "rockchip_drm_drv.h"
#include "rockchip_drm_gem.h"
#include "rockchip_drm_fb.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 struct fb_ops rockchip_drm_fbdev_ops = {
.owner = THIS_MODULE,
.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,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_blank = drm_fb_helper_blank,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_setcmap = drm_fb_helper_setcmap,
};
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)) {
dev_err(dev->dev, "Failed to create framebuffer info.\n");
ret = PTR_ERR(fbi);
goto err_rockchip_gem_free_object;
}
helper->fb = rockchip_drm_framebuffer_init(dev, &mode_cmd,
private->fbdev_bo);
if (IS_ERR(helper->fb)) {
dev_err(dev->dev, "Failed to allocate DRM framebuffer.\n");
ret = PTR_ERR(helper->fb);
goto err_release_fbi;
}
fbi->par = helper;
fbi->flags = FBINFO_FLAG_DEFAULT;
fbi->fbops = &rockchip_drm_fbdev_ops;
fb = helper->fb;
drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);
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->depth, rk_obj->kvaddr,
offset, size);
fbi->skip_vt_switch = true;
return 0;
err_release_fbi:
drm_fb_helper_release_fbi(helper);
err_rockchip_gem_free_object:
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;
unsigned int num_crtc;
int ret;
if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
return -EINVAL;
num_crtc = dev->mode_config.num_crtc;
helper = &private->fbdev_helper;
drm_fb_helper_prepare(dev, helper, &rockchip_drm_fb_helper_funcs);
ret = drm_fb_helper_init(dev, helper, num_crtc, ROCKCHIP_MAX_CONNECTOR);
if (ret < 0) {
dev_err(dev->dev, "Failed to initialize drm fb helper - %d.\n",
ret);
return ret;
}
ret = drm_fb_helper_single_add_all_connectors(helper);
if (ret < 0) {
dev_err(dev->dev, "Failed to add connectors - %d.\n", ret);
goto err_drm_fb_helper_fini;
}
ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
if (ret < 0) {
dev_err(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);
drm_fb_helper_release_fbi(helper);
if (helper->fb)
drm_framebuffer_unreference(helper->fb);
drm_fb_helper_fini(helper);
}
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