1 /* 2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 3 * Author:Mark Yao <mark.yao@rock-chips.com> 4 * 5 * This software is licensed under the terms of the GNU General Public 6 * License version 2, as published by the Free Software Foundation, and 7 * may be copied, distributed, and modified under those terms. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #include <linux/kernel.h> 16 #include <drm/drm.h> 17 #include <drm/drmP.h> 18 #include <drm/drm_atomic.h> 19 #include <drm/drm_fb_helper.h> 20 #include <drm/drm_gem_framebuffer_helper.h> 21 #include <drm/drm_probe_helper.h> 22 23 #include "rockchip_drm_drv.h" 24 #include "rockchip_drm_fb.h" 25 #include "rockchip_drm_gem.h" 26 #include "rockchip_drm_psr.h" 27 28 static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb, 29 struct drm_file *file, 30 unsigned int flags, unsigned int color, 31 struct drm_clip_rect *clips, 32 unsigned int num_clips) 33 { 34 rockchip_drm_psr_flush_all(fb->dev); 35 return 0; 36 } 37 38 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { 39 .destroy = drm_gem_fb_destroy, 40 .create_handle = drm_gem_fb_create_handle, 41 .dirty = rockchip_drm_fb_dirty, 42 }; 43 44 static struct drm_framebuffer * 45 rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, 46 struct drm_gem_object **obj, unsigned int num_planes) 47 { 48 struct drm_framebuffer *fb; 49 int ret; 50 int i; 51 52 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 53 if (!fb) 54 return ERR_PTR(-ENOMEM); 55 56 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 57 58 for (i = 0; i < num_planes; i++) 59 fb->obj[i] = obj[i]; 60 61 ret = drm_framebuffer_init(dev, fb, &rockchip_drm_fb_funcs); 62 if (ret) { 63 DRM_DEV_ERROR(dev->dev, 64 "Failed to initialize framebuffer: %d\n", 65 ret); 66 kfree(fb); 67 return ERR_PTR(ret); 68 } 69 70 return fb; 71 } 72 73 static struct drm_framebuffer * 74 rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 75 const struct drm_mode_fb_cmd2 *mode_cmd) 76 { 77 const struct drm_format_info *info = drm_get_format_info(dev, 78 mode_cmd); 79 struct drm_framebuffer *fb; 80 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; 81 struct drm_gem_object *obj; 82 int num_planes = min_t(int, info->num_planes, ROCKCHIP_MAX_FB_BUFFER); 83 int ret; 84 int i; 85 86 for (i = 0; i < num_planes; i++) { 87 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 88 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 89 unsigned int min_size; 90 91 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]); 92 if (!obj) { 93 DRM_DEV_ERROR(dev->dev, 94 "Failed to lookup GEM object\n"); 95 ret = -ENXIO; 96 goto err_gem_object_unreference; 97 } 98 99 min_size = (height - 1) * mode_cmd->pitches[i] + 100 mode_cmd->offsets[i] + 101 width * info->cpp[i]; 102 103 if (obj->size < min_size) { 104 drm_gem_object_put_unlocked(obj); 105 ret = -EINVAL; 106 goto err_gem_object_unreference; 107 } 108 objs[i] = obj; 109 } 110 111 fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); 112 if (IS_ERR(fb)) { 113 ret = PTR_ERR(fb); 114 goto err_gem_object_unreference; 115 } 116 117 return fb; 118 119 err_gem_object_unreference: 120 for (i--; i >= 0; i--) 121 drm_gem_object_put_unlocked(objs[i]); 122 return ERR_PTR(ret); 123 } 124 125 static void 126 rockchip_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) 127 { 128 struct drm_device *dev = old_state->dev; 129 130 rockchip_drm_psr_inhibit_get_state(old_state); 131 132 drm_atomic_helper_commit_modeset_disables(dev, old_state); 133 134 drm_atomic_helper_commit_modeset_enables(dev, old_state); 135 136 drm_atomic_helper_commit_planes(dev, old_state, 137 DRM_PLANE_COMMIT_ACTIVE_ONLY); 138 139 rockchip_drm_psr_inhibit_put_state(old_state); 140 141 drm_atomic_helper_commit_hw_done(old_state); 142 143 drm_atomic_helper_wait_for_vblanks(dev, old_state); 144 145 drm_atomic_helper_cleanup_planes(dev, old_state); 146 } 147 148 static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { 149 .atomic_commit_tail = rockchip_atomic_helper_commit_tail_rpm, 150 }; 151 152 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { 153 .fb_create = rockchip_user_fb_create, 154 .output_poll_changed = drm_fb_helper_output_poll_changed, 155 .atomic_check = drm_atomic_helper_check, 156 .atomic_commit = drm_atomic_helper_commit, 157 }; 158 159 struct drm_framebuffer * 160 rockchip_drm_framebuffer_init(struct drm_device *dev, 161 const struct drm_mode_fb_cmd2 *mode_cmd, 162 struct drm_gem_object *obj) 163 { 164 struct drm_framebuffer *fb; 165 166 fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); 167 if (IS_ERR(fb)) 168 return ERR_CAST(fb); 169 170 return fb; 171 } 172 173 void rockchip_drm_mode_config_init(struct drm_device *dev) 174 { 175 dev->mode_config.min_width = 0; 176 dev->mode_config.min_height = 0; 177 178 /* 179 * set max width and height as default value(4096x4096). 180 * this value would be used to check framebuffer size limitation 181 * at drm_mode_addfb(). 182 */ 183 dev->mode_config.max_width = 4096; 184 dev->mode_config.max_height = 4096; 185 186 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; 187 dev->mode_config.helper_private = &rockchip_mode_config_helpers; 188 } 189