1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Rockchip Electronics Co., Ltd. 4 * Author:Mark Yao <mark.yao@rock-chips.com> 5 */ 6 7 #include <linux/kernel.h> 8 9 #include <drm/drm.h> 10 #include <drm/drm_atomic.h> 11 #include <drm/drm_damage_helper.h> 12 #include <drm/drm_fourcc.h> 13 #include <drm/drm_framebuffer.h> 14 #include <drm/drm_gem_framebuffer_helper.h> 15 #include <drm/drm_probe_helper.h> 16 17 #include "rockchip_drm_drv.h" 18 #include "rockchip_drm_fb.h" 19 #include "rockchip_drm_gem.h" 20 21 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { 22 .destroy = drm_gem_fb_destroy, 23 .create_handle = drm_gem_fb_create_handle, 24 .dirty = drm_atomic_helper_dirtyfb, 25 }; 26 27 static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { 28 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm, 29 }; 30 31 static struct drm_framebuffer * 32 rockchip_fb_create(struct drm_device *dev, struct drm_file *file, 33 const struct drm_mode_fb_cmd2 *mode_cmd) 34 { 35 struct drm_afbc_framebuffer *afbc_fb; 36 const struct drm_format_info *info; 37 int ret; 38 39 info = drm_get_format_info(dev, mode_cmd); 40 if (!info) 41 return ERR_PTR(-ENOMEM); 42 43 afbc_fb = kzalloc(sizeof(*afbc_fb), GFP_KERNEL); 44 if (!afbc_fb) 45 return ERR_PTR(-ENOMEM); 46 47 ret = drm_gem_fb_init_with_funcs(dev, &afbc_fb->base, file, mode_cmd, 48 &rockchip_drm_fb_funcs); 49 if (ret) { 50 kfree(afbc_fb); 51 return ERR_PTR(ret); 52 } 53 54 if (drm_is_afbc(mode_cmd->modifier[0])) { 55 ret = drm_gem_fb_afbc_init(dev, mode_cmd, afbc_fb); 56 if (ret) { 57 drm_framebuffer_put(&afbc_fb->base); 58 return ERR_PTR(ret); 59 } 60 } 61 62 return &afbc_fb->base; 63 } 64 65 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { 66 .fb_create = rockchip_fb_create, 67 .atomic_check = drm_atomic_helper_check, 68 .atomic_commit = drm_atomic_helper_commit, 69 }; 70 71 void rockchip_drm_mode_config_init(struct drm_device *dev) 72 { 73 dev->mode_config.min_width = 0; 74 dev->mode_config.min_height = 0; 75 76 /* 77 * set max width and height as default value(4096x4096). 78 * this value would be used to check framebuffer size limitation 79 * at drm_mode_addfb(). 80 */ 81 dev->mode_config.max_width = 4096; 82 dev->mode_config.max_height = 4096; 83 84 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; 85 dev->mode_config.helper_private = &rockchip_mode_config_helpers; 86 87 dev->mode_config.normalize_zpos = true; 88 } 89