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 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 */ 14 15 #include <drm/drmP.h> 16 #include <drm/drm_crtc.h> 17 #include <drm/drm_crtc_helper.h> 18 #include <drm/drm_fb_helper.h> 19 #include <uapi/drm/exynos_drm.h> 20 21 #include "exynos_drm_drv.h" 22 #include "exynos_drm_fb.h" 23 #include "exynos_drm_gem.h" 24 #include "exynos_drm_iommu.h" 25 #include "exynos_drm_encoder.h" 26 27 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb) 28 29 /* 30 * exynos specific framebuffer structure. 31 * 32 * @fb: drm framebuffer obejct. 33 * @buf_cnt: a buffer count to drm framebuffer. 34 * @exynos_gem_obj: array of exynos specific gem object containing a gem object. 35 */ 36 struct exynos_drm_fb { 37 struct drm_framebuffer fb; 38 unsigned int buf_cnt; 39 struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER]; 40 }; 41 42 static int check_fb_gem_memory_type(struct drm_device *drm_dev, 43 struct exynos_drm_gem_obj *exynos_gem_obj) 44 { 45 unsigned int flags; 46 47 /* 48 * if exynos drm driver supports iommu then framebuffer can use 49 * all the buffer types. 50 */ 51 if (is_drm_iommu_supported(drm_dev)) 52 return 0; 53 54 flags = exynos_gem_obj->flags; 55 56 /* 57 * without iommu support, not support physically non-continuous memory 58 * for framebuffer. 59 */ 60 if (IS_NONCONTIG_BUFFER(flags)) { 61 DRM_ERROR("cannot use this gem memory type for fb.\n"); 62 return -EINVAL; 63 } 64 65 return 0; 66 } 67 68 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb) 69 { 70 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 71 unsigned int i; 72 73 DRM_DEBUG_KMS("%s\n", __FILE__); 74 75 /* make sure that overlay data are updated before relesing fb. */ 76 exynos_drm_encoder_complete_scanout(fb); 77 78 drm_framebuffer_cleanup(fb); 79 80 for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) { 81 struct drm_gem_object *obj; 82 83 if (exynos_fb->exynos_gem_obj[i] == NULL) 84 continue; 85 86 obj = &exynos_fb->exynos_gem_obj[i]->base; 87 drm_gem_object_unreference_unlocked(obj); 88 } 89 90 kfree(exynos_fb); 91 exynos_fb = NULL; 92 } 93 94 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb, 95 struct drm_file *file_priv, 96 unsigned int *handle) 97 { 98 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 99 100 DRM_DEBUG_KMS("%s\n", __FILE__); 101 102 return drm_gem_handle_create(file_priv, 103 &exynos_fb->exynos_gem_obj[0]->base, handle); 104 } 105 106 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb, 107 struct drm_file *file_priv, unsigned flags, 108 unsigned color, struct drm_clip_rect *clips, 109 unsigned num_clips) 110 { 111 DRM_DEBUG_KMS("%s\n", __FILE__); 112 113 /* TODO */ 114 115 return 0; 116 } 117 118 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = { 119 .destroy = exynos_drm_fb_destroy, 120 .create_handle = exynos_drm_fb_create_handle, 121 .dirty = exynos_drm_fb_dirty, 122 }; 123 124 void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb, 125 unsigned int cnt) 126 { 127 struct exynos_drm_fb *exynos_fb; 128 129 exynos_fb = to_exynos_fb(fb); 130 131 exynos_fb->buf_cnt = cnt; 132 } 133 134 unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb) 135 { 136 struct exynos_drm_fb *exynos_fb; 137 138 exynos_fb = to_exynos_fb(fb); 139 140 return exynos_fb->buf_cnt; 141 } 142 143 struct drm_framebuffer * 144 exynos_drm_framebuffer_init(struct drm_device *dev, 145 struct drm_mode_fb_cmd2 *mode_cmd, 146 struct drm_gem_object *obj) 147 { 148 struct exynos_drm_fb *exynos_fb; 149 struct exynos_drm_gem_obj *exynos_gem_obj; 150 int ret; 151 152 exynos_gem_obj = to_exynos_gem_obj(obj); 153 154 ret = check_fb_gem_memory_type(dev, exynos_gem_obj); 155 if (ret < 0) { 156 DRM_ERROR("cannot use this gem memory type for fb.\n"); 157 return ERR_PTR(-EINVAL); 158 } 159 160 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); 161 if (!exynos_fb) { 162 DRM_ERROR("failed to allocate exynos drm framebuffer\n"); 163 return ERR_PTR(-ENOMEM); 164 } 165 166 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); 167 exynos_fb->exynos_gem_obj[0] = exynos_gem_obj; 168 169 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); 170 if (ret) { 171 DRM_ERROR("failed to initialize framebuffer\n"); 172 return ERR_PTR(ret); 173 } 174 175 return &exynos_fb->fb; 176 } 177 178 static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2 *mode_cmd) 179 { 180 unsigned int cnt = 0; 181 182 if (mode_cmd->pixel_format != DRM_FORMAT_NV12) 183 return drm_format_num_planes(mode_cmd->pixel_format); 184 185 while (cnt != MAX_FB_BUFFER) { 186 if (!mode_cmd->handles[cnt]) 187 break; 188 cnt++; 189 } 190 191 /* 192 * check if NV12 or NV12M. 193 * 194 * NV12 195 * handles[0] = base1, offsets[0] = 0 196 * handles[1] = base1, offsets[1] = Y_size 197 * 198 * NV12M 199 * handles[0] = base1, offsets[0] = 0 200 * handles[1] = base2, offsets[1] = 0 201 */ 202 if (cnt == 2) { 203 /* 204 * in case of NV12 format, offsets[1] is not 0 and 205 * handles[0] is same as handles[1]. 206 */ 207 if (mode_cmd->offsets[1] && 208 mode_cmd->handles[0] == mode_cmd->handles[1]) 209 cnt = 1; 210 } 211 212 return cnt; 213 } 214 215 static struct drm_framebuffer * 216 exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 217 struct drm_mode_fb_cmd2 *mode_cmd) 218 { 219 struct drm_gem_object *obj; 220 struct exynos_drm_fb *exynos_fb; 221 int i, ret; 222 223 DRM_DEBUG_KMS("%s\n", __FILE__); 224 225 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); 226 if (!obj) { 227 DRM_ERROR("failed to lookup gem object\n"); 228 return ERR_PTR(-ENOENT); 229 } 230 231 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); 232 if (!exynos_fb) { 233 DRM_ERROR("failed to allocate exynos drm framebuffer\n"); 234 return ERR_PTR(-ENOMEM); 235 } 236 237 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); 238 exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj); 239 exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd); 240 241 DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt); 242 243 for (i = 1; i < exynos_fb->buf_cnt; i++) { 244 struct exynos_drm_gem_obj *exynos_gem_obj; 245 int ret; 246 247 obj = drm_gem_object_lookup(dev, file_priv, 248 mode_cmd->handles[i]); 249 if (!obj) { 250 DRM_ERROR("failed to lookup gem object\n"); 251 kfree(exynos_fb); 252 return ERR_PTR(-ENOENT); 253 } 254 255 exynos_gem_obj = to_exynos_gem_obj(obj); 256 257 ret = check_fb_gem_memory_type(dev, exynos_gem_obj); 258 if (ret < 0) { 259 DRM_ERROR("cannot use this gem memory type for fb.\n"); 260 kfree(exynos_fb); 261 return ERR_PTR(ret); 262 } 263 264 exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj); 265 } 266 267 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); 268 if (ret) { 269 for (i = 0; i < exynos_fb->buf_cnt; i++) { 270 struct exynos_drm_gem_obj *gem_obj; 271 272 gem_obj = exynos_fb->exynos_gem_obj[i]; 273 drm_gem_object_unreference_unlocked(&gem_obj->base); 274 } 275 276 kfree(exynos_fb); 277 return ERR_PTR(ret); 278 } 279 280 return &exynos_fb->fb; 281 } 282 283 struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb, 284 int index) 285 { 286 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 287 struct exynos_drm_gem_buf *buffer; 288 289 DRM_DEBUG_KMS("%s\n", __FILE__); 290 291 if (index >= MAX_FB_BUFFER) 292 return NULL; 293 294 buffer = exynos_fb->exynos_gem_obj[index]->buffer; 295 if (!buffer) 296 return NULL; 297 298 DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr); 299 300 return buffer; 301 } 302 303 static void exynos_drm_output_poll_changed(struct drm_device *dev) 304 { 305 struct exynos_drm_private *private = dev->dev_private; 306 struct drm_fb_helper *fb_helper = private->fb_helper; 307 308 if (fb_helper) 309 drm_fb_helper_hotplug_event(fb_helper); 310 } 311 312 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { 313 .fb_create = exynos_user_fb_create, 314 .output_poll_changed = exynos_drm_output_poll_changed, 315 }; 316 317 void exynos_drm_mode_config_init(struct drm_device *dev) 318 { 319 dev->mode_config.min_width = 0; 320 dev->mode_config.min_height = 0; 321 322 /* 323 * set max width and height as default value(4096x4096). 324 * this value would be used to check framebuffer size limitation 325 * at drm_mode_addfb(). 326 */ 327 dev->mode_config.max_width = 4096; 328 dev->mode_config.max_height = 4096; 329 330 dev->mode_config.funcs = &exynos_drm_mode_config_funcs; 331 } 332