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_crtc_helper.h> 21 22 #include "rockchip_drm_drv.h" 23 #include "rockchip_drm_fb.h" 24 #include "rockchip_drm_gem.h" 25 #include "rockchip_drm_psr.h" 26 27 #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) 28 29 struct rockchip_drm_fb { 30 struct drm_framebuffer fb; 31 struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER]; 32 }; 33 34 struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb, 35 unsigned int plane) 36 { 37 struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb); 38 39 if (plane >= ROCKCHIP_MAX_FB_BUFFER) 40 return NULL; 41 42 return rk_fb->obj[plane]; 43 } 44 45 static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb) 46 { 47 struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); 48 int i; 49 50 for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) 51 drm_gem_object_unreference_unlocked(rockchip_fb->obj[i]); 52 53 drm_framebuffer_cleanup(fb); 54 kfree(rockchip_fb); 55 } 56 57 static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, 58 struct drm_file *file_priv, 59 unsigned int *handle) 60 { 61 struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); 62 63 return drm_gem_handle_create(file_priv, 64 rockchip_fb->obj[0], handle); 65 } 66 67 static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb, 68 struct drm_file *file, 69 unsigned int flags, unsigned int color, 70 struct drm_clip_rect *clips, 71 unsigned int num_clips) 72 { 73 rockchip_drm_psr_flush_all(fb->dev); 74 return 0; 75 } 76 77 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { 78 .destroy = rockchip_drm_fb_destroy, 79 .create_handle = rockchip_drm_fb_create_handle, 80 .dirty = rockchip_drm_fb_dirty, 81 }; 82 83 static struct rockchip_drm_fb * 84 rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, 85 struct drm_gem_object **obj, unsigned int num_planes) 86 { 87 struct rockchip_drm_fb *rockchip_fb; 88 int ret; 89 int i; 90 91 rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL); 92 if (!rockchip_fb) 93 return ERR_PTR(-ENOMEM); 94 95 drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd); 96 97 for (i = 0; i < num_planes; i++) 98 rockchip_fb->obj[i] = obj[i]; 99 100 ret = drm_framebuffer_init(dev, &rockchip_fb->fb, 101 &rockchip_drm_fb_funcs); 102 if (ret) { 103 dev_err(dev->dev, "Failed to initialize framebuffer: %d\n", 104 ret); 105 kfree(rockchip_fb); 106 return ERR_PTR(ret); 107 } 108 109 return rockchip_fb; 110 } 111 112 static struct drm_framebuffer * 113 rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 114 const struct drm_mode_fb_cmd2 *mode_cmd) 115 { 116 struct rockchip_drm_fb *rockchip_fb; 117 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; 118 struct drm_gem_object *obj; 119 unsigned int hsub; 120 unsigned int vsub; 121 int num_planes; 122 int ret; 123 int i; 124 125 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); 126 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); 127 num_planes = min(drm_format_num_planes(mode_cmd->pixel_format), 128 ROCKCHIP_MAX_FB_BUFFER); 129 130 for (i = 0; i < num_planes; i++) { 131 unsigned int width = mode_cmd->width / (i ? hsub : 1); 132 unsigned int height = mode_cmd->height / (i ? vsub : 1); 133 unsigned int min_size; 134 135 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]); 136 if (!obj) { 137 dev_err(dev->dev, "Failed to lookup GEM object\n"); 138 ret = -ENXIO; 139 goto err_gem_object_unreference; 140 } 141 142 min_size = (height - 1) * mode_cmd->pitches[i] + 143 mode_cmd->offsets[i] + 144 width * drm_format_plane_cpp(mode_cmd->pixel_format, i); 145 146 if (obj->size < min_size) { 147 drm_gem_object_unreference_unlocked(obj); 148 ret = -EINVAL; 149 goto err_gem_object_unreference; 150 } 151 objs[i] = obj; 152 } 153 154 rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); 155 if (IS_ERR(rockchip_fb)) { 156 ret = PTR_ERR(rockchip_fb); 157 goto err_gem_object_unreference; 158 } 159 160 return &rockchip_fb->fb; 161 162 err_gem_object_unreference: 163 for (i--; i >= 0; i--) 164 drm_gem_object_unreference_unlocked(objs[i]); 165 return ERR_PTR(ret); 166 } 167 168 static void rockchip_drm_output_poll_changed(struct drm_device *dev) 169 { 170 struct rockchip_drm_private *private = dev->dev_private; 171 struct drm_fb_helper *fb_helper = &private->fbdev_helper; 172 173 if (fb_helper) 174 drm_fb_helper_hotplug_event(fb_helper); 175 } 176 177 static void 178 rockchip_atomic_commit_tail(struct drm_atomic_state *state) 179 { 180 struct drm_device *dev = state->dev; 181 182 drm_atomic_helper_commit_modeset_disables(dev, state); 183 184 drm_atomic_helper_commit_modeset_enables(dev, state); 185 186 drm_atomic_helper_commit_planes(dev, state, 187 DRM_PLANE_COMMIT_ACTIVE_ONLY); 188 189 drm_atomic_helper_commit_hw_done(state); 190 191 drm_atomic_helper_wait_for_vblanks(dev, state); 192 193 drm_atomic_helper_cleanup_planes(dev, state); 194 } 195 196 static struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { 197 .atomic_commit_tail = rockchip_atomic_commit_tail, 198 }; 199 200 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { 201 .fb_create = rockchip_user_fb_create, 202 .output_poll_changed = rockchip_drm_output_poll_changed, 203 .atomic_check = drm_atomic_helper_check, 204 .atomic_commit = drm_atomic_helper_commit, 205 }; 206 207 struct drm_framebuffer * 208 rockchip_drm_framebuffer_init(struct drm_device *dev, 209 const struct drm_mode_fb_cmd2 *mode_cmd, 210 struct drm_gem_object *obj) 211 { 212 struct rockchip_drm_fb *rockchip_fb; 213 214 rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); 215 if (IS_ERR(rockchip_fb)) 216 return NULL; 217 218 return &rockchip_fb->fb; 219 } 220 221 void rockchip_drm_mode_config_init(struct drm_device *dev) 222 { 223 dev->mode_config.min_width = 0; 224 dev->mode_config.min_height = 0; 225 226 /* 227 * set max width and height as default value(4096x4096). 228 * this value would be used to check framebuffer size limitation 229 * at drm_mode_addfb(). 230 */ 231 dev->mode_config.max_width = 4096; 232 dev->mode_config.max_height = 4096; 233 234 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; 235 dev->mode_config.helper_private = &rockchip_mode_config_helpers; 236 } 237