1 /* exynos_drm_fb.c 2 * 3 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 4 * Authors: 5 * Inki Dae <inki.dae@samsung.com> 6 * Joonyoung Shim <jy0922.shim@samsung.com> 7 * Seung-Woo Kim <sw0312.kim@samsung.com> 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the next 17 * paragraph) shall be included in all copies or substantial portions of the 18 * Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 26 * OTHER DEALINGS IN THE SOFTWARE. 27 */ 28 29 #include <drm/drmP.h> 30 #include <drm/drm_crtc.h> 31 #include <drm/drm_crtc_helper.h> 32 #include <drm/drm_fb_helper.h> 33 #include <uapi/drm/exynos_drm.h> 34 35 #include "exynos_drm_drv.h" 36 #include "exynos_drm_fb.h" 37 #include "exynos_drm_gem.h" 38 #include "exynos_drm_iommu.h" 39 #include "exynos_drm_encoder.h" 40 41 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb) 42 43 /* 44 * exynos specific framebuffer structure. 45 * 46 * @fb: drm framebuffer obejct. 47 * @buf_cnt: a buffer count to drm framebuffer. 48 * @exynos_gem_obj: array of exynos specific gem object containing a gem object. 49 */ 50 struct exynos_drm_fb { 51 struct drm_framebuffer fb; 52 unsigned int buf_cnt; 53 struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER]; 54 }; 55 56 static int check_fb_gem_memory_type(struct drm_device *drm_dev, 57 struct exynos_drm_gem_obj *exynos_gem_obj) 58 { 59 unsigned int flags; 60 61 /* 62 * if exynos drm driver supports iommu then framebuffer can use 63 * all the buffer types. 64 */ 65 if (is_drm_iommu_supported(drm_dev)) 66 return 0; 67 68 flags = exynos_gem_obj->flags; 69 70 /* 71 * without iommu support, not support physically non-continuous memory 72 * for framebuffer. 73 */ 74 if (IS_NONCONTIG_BUFFER(flags)) { 75 DRM_ERROR("cannot use this gem memory type for fb.\n"); 76 return -EINVAL; 77 } 78 79 return 0; 80 } 81 82 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb) 83 { 84 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 85 unsigned int i; 86 87 DRM_DEBUG_KMS("%s\n", __FILE__); 88 89 /* make sure that overlay data are updated before relesing fb. */ 90 exynos_drm_encoder_complete_scanout(fb); 91 92 drm_framebuffer_cleanup(fb); 93 94 for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) { 95 struct drm_gem_object *obj; 96 97 if (exynos_fb->exynos_gem_obj[i] == NULL) 98 continue; 99 100 obj = &exynos_fb->exynos_gem_obj[i]->base; 101 drm_gem_object_unreference_unlocked(obj); 102 } 103 104 kfree(exynos_fb); 105 exynos_fb = NULL; 106 } 107 108 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb, 109 struct drm_file *file_priv, 110 unsigned int *handle) 111 { 112 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 113 114 DRM_DEBUG_KMS("%s\n", __FILE__); 115 116 return drm_gem_handle_create(file_priv, 117 &exynos_fb->exynos_gem_obj[0]->base, handle); 118 } 119 120 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb, 121 struct drm_file *file_priv, unsigned flags, 122 unsigned color, struct drm_clip_rect *clips, 123 unsigned num_clips) 124 { 125 DRM_DEBUG_KMS("%s\n", __FILE__); 126 127 /* TODO */ 128 129 return 0; 130 } 131 132 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = { 133 .destroy = exynos_drm_fb_destroy, 134 .create_handle = exynos_drm_fb_create_handle, 135 .dirty = exynos_drm_fb_dirty, 136 }; 137 138 void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb, 139 unsigned int cnt) 140 { 141 struct exynos_drm_fb *exynos_fb; 142 143 exynos_fb = to_exynos_fb(fb); 144 145 exynos_fb->buf_cnt = cnt; 146 } 147 148 unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb) 149 { 150 struct exynos_drm_fb *exynos_fb; 151 152 exynos_fb = to_exynos_fb(fb); 153 154 return exynos_fb->buf_cnt; 155 } 156 157 struct drm_framebuffer * 158 exynos_drm_framebuffer_init(struct drm_device *dev, 159 struct drm_mode_fb_cmd2 *mode_cmd, 160 struct drm_gem_object *obj) 161 { 162 struct exynos_drm_fb *exynos_fb; 163 struct exynos_drm_gem_obj *exynos_gem_obj; 164 int ret; 165 166 exynos_gem_obj = to_exynos_gem_obj(obj); 167 168 ret = check_fb_gem_memory_type(dev, exynos_gem_obj); 169 if (ret < 0) { 170 DRM_ERROR("cannot use this gem memory type for fb.\n"); 171 return ERR_PTR(-EINVAL); 172 } 173 174 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); 175 if (!exynos_fb) { 176 DRM_ERROR("failed to allocate exynos drm framebuffer\n"); 177 return ERR_PTR(-ENOMEM); 178 } 179 180 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); 181 exynos_fb->exynos_gem_obj[0] = exynos_gem_obj; 182 183 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); 184 if (ret) { 185 DRM_ERROR("failed to initialize framebuffer\n"); 186 return ERR_PTR(ret); 187 } 188 189 return &exynos_fb->fb; 190 } 191 192 static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2 *mode_cmd) 193 { 194 unsigned int cnt = 0; 195 196 if (mode_cmd->pixel_format != DRM_FORMAT_NV12) 197 return drm_format_num_planes(mode_cmd->pixel_format); 198 199 while (cnt != MAX_FB_BUFFER) { 200 if (!mode_cmd->handles[cnt]) 201 break; 202 cnt++; 203 } 204 205 /* 206 * check if NV12 or NV12M. 207 * 208 * NV12 209 * handles[0] = base1, offsets[0] = 0 210 * handles[1] = base1, offsets[1] = Y_size 211 * 212 * NV12M 213 * handles[0] = base1, offsets[0] = 0 214 * handles[1] = base2, offsets[1] = 0 215 */ 216 if (cnt == 2) { 217 /* 218 * in case of NV12 format, offsets[1] is not 0 and 219 * handles[0] is same as handles[1]. 220 */ 221 if (mode_cmd->offsets[1] && 222 mode_cmd->handles[0] == mode_cmd->handles[1]) 223 cnt = 1; 224 } 225 226 return cnt; 227 } 228 229 static struct drm_framebuffer * 230 exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 231 struct drm_mode_fb_cmd2 *mode_cmd) 232 { 233 struct drm_gem_object *obj; 234 struct exynos_drm_fb *exynos_fb; 235 int i, ret; 236 237 DRM_DEBUG_KMS("%s\n", __FILE__); 238 239 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); 240 if (!obj) { 241 DRM_ERROR("failed to lookup gem object\n"); 242 return ERR_PTR(-ENOENT); 243 } 244 245 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); 246 if (!exynos_fb) { 247 DRM_ERROR("failed to allocate exynos drm framebuffer\n"); 248 return ERR_PTR(-ENOMEM); 249 } 250 251 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); 252 exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj); 253 exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd); 254 255 DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt); 256 257 for (i = 1; i < exynos_fb->buf_cnt; i++) { 258 struct exynos_drm_gem_obj *exynos_gem_obj; 259 int ret; 260 261 obj = drm_gem_object_lookup(dev, file_priv, 262 mode_cmd->handles[i]); 263 if (!obj) { 264 DRM_ERROR("failed to lookup gem object\n"); 265 kfree(exynos_fb); 266 return ERR_PTR(-ENOENT); 267 } 268 269 exynos_gem_obj = to_exynos_gem_obj(obj); 270 271 ret = check_fb_gem_memory_type(dev, exynos_gem_obj); 272 if (ret < 0) { 273 DRM_ERROR("cannot use this gem memory type for fb.\n"); 274 kfree(exynos_fb); 275 return ERR_PTR(ret); 276 } 277 278 exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj); 279 } 280 281 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); 282 if (ret) { 283 for (i = 0; i < exynos_fb->buf_cnt; i++) { 284 struct exynos_drm_gem_obj *gem_obj; 285 286 gem_obj = exynos_fb->exynos_gem_obj[i]; 287 drm_gem_object_unreference_unlocked(&gem_obj->base); 288 } 289 290 kfree(exynos_fb); 291 return ERR_PTR(ret); 292 } 293 294 return &exynos_fb->fb; 295 } 296 297 struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb, 298 int index) 299 { 300 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 301 struct exynos_drm_gem_buf *buffer; 302 303 DRM_DEBUG_KMS("%s\n", __FILE__); 304 305 if (index >= MAX_FB_BUFFER) 306 return NULL; 307 308 buffer = exynos_fb->exynos_gem_obj[index]->buffer; 309 if (!buffer) 310 return NULL; 311 312 DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr); 313 314 return buffer; 315 } 316 317 static void exynos_drm_output_poll_changed(struct drm_device *dev) 318 { 319 struct exynos_drm_private *private = dev->dev_private; 320 struct drm_fb_helper *fb_helper = private->fb_helper; 321 322 if (fb_helper) 323 drm_fb_helper_hotplug_event(fb_helper); 324 } 325 326 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { 327 .fb_create = exynos_user_fb_create, 328 .output_poll_changed = exynos_drm_output_poll_changed, 329 }; 330 331 void exynos_drm_mode_config_init(struct drm_device *dev) 332 { 333 dev->mode_config.min_width = 0; 334 dev->mode_config.min_height = 0; 335 336 /* 337 * set max width and height as default value(4096x4096). 338 * this value would be used to check framebuffer size limitation 339 * at drm_mode_addfb(). 340 */ 341 dev->mode_config.max_width = 4096; 342 dev->mode_config.max_height = 4096; 343 344 dev->mode_config.funcs = &exynos_drm_mode_config_funcs; 345 } 346