1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Fuzhou 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_fb_helper.h> 13 #include <drm/drm_fourcc.h> 14 #include <drm/drm_framebuffer.h> 15 #include <drm/drm_gem_framebuffer_helper.h> 16 #include <drm/drm_probe_helper.h> 17 18 #include "rockchip_drm_drv.h" 19 #include "rockchip_drm_fb.h" 20 #include "rockchip_drm_gem.h" 21 22 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { 23 .destroy = drm_gem_fb_destroy, 24 .create_handle = drm_gem_fb_create_handle, 25 .dirty = drm_atomic_helper_dirtyfb, 26 }; 27 28 static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { 29 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm, 30 }; 31 32 static struct drm_framebuffer * 33 rockchip_fb_create(struct drm_device *dev, struct drm_file *file, 34 const struct drm_mode_fb_cmd2 *mode_cmd) 35 { 36 struct drm_afbc_framebuffer *afbc_fb; 37 const struct drm_format_info *info; 38 int ret; 39 40 info = drm_get_format_info(dev, mode_cmd); 41 if (!info) 42 return ERR_PTR(-ENOMEM); 43 44 afbc_fb = kzalloc(sizeof(*afbc_fb), GFP_KERNEL); 45 if (!afbc_fb) 46 return ERR_PTR(-ENOMEM); 47 48 ret = drm_gem_fb_init_with_funcs(dev, &afbc_fb->base, file, mode_cmd, 49 &rockchip_drm_fb_funcs); 50 if (ret) { 51 kfree(afbc_fb); 52 return ERR_PTR(ret); 53 } 54 55 if (drm_is_afbc(mode_cmd->modifier[0])) { 56 int ret, i; 57 58 ret = drm_gem_fb_afbc_init(dev, mode_cmd, afbc_fb); 59 if (ret) { 60 struct drm_gem_object **obj = afbc_fb->base.obj; 61 62 for (i = 0; i < info->num_planes; ++i) 63 drm_gem_object_put(obj[i]); 64 65 kfree(afbc_fb); 66 return ERR_PTR(ret); 67 } 68 } 69 70 return &afbc_fb->base; 71 } 72 73 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { 74 .fb_create = rockchip_fb_create, 75 .output_poll_changed = drm_fb_helper_output_poll_changed, 76 .atomic_check = drm_atomic_helper_check, 77 .atomic_commit = drm_atomic_helper_commit, 78 }; 79 80 void rockchip_drm_mode_config_init(struct drm_device *dev) 81 { 82 dev->mode_config.min_width = 0; 83 dev->mode_config.min_height = 0; 84 85 /* 86 * set max width and height as default value(4096x4096). 87 * this value would be used to check framebuffer size limitation 88 * at drm_mode_addfb(). 89 */ 90 dev->mode_config.max_width = 4096; 91 dev->mode_config.max_height = 4096; 92 93 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; 94 dev->mode_config.helper_private = &rockchip_mode_config_helpers; 95 96 dev->mode_config.normalize_zpos = true; 97 } 98