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 "drmP.h" 30 #include "drm_crtc.h" 31 #include "drm_crtc_helper.h" 32 #include "drm_fb_helper.h" 33 34 #include "exynos_drm_drv.h" 35 #include "exynos_drm_fb.h" 36 #include "exynos_drm_buf.h" 37 #include "exynos_drm_gem.h" 38 39 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb) 40 41 /* 42 * exynos specific framebuffer structure. 43 * 44 * @fb: drm framebuffer obejct. 45 * @exynos_gem_obj: exynos specific gem object containing a gem object. 46 * @buffer: pointer to exynos_drm_gem_buffer object. 47 * - contain the memory information to memory region allocated 48 * at default framebuffer creation. 49 */ 50 struct exynos_drm_fb { 51 struct drm_framebuffer fb; 52 struct exynos_drm_gem_obj *exynos_gem_obj; 53 struct exynos_drm_gem_buf *buffer; 54 }; 55 56 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb) 57 { 58 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 59 60 DRM_DEBUG_KMS("%s\n", __FILE__); 61 62 drm_framebuffer_cleanup(fb); 63 64 /* 65 * default framebuffer has no gem object so 66 * a buffer of the default framebuffer should be released at here. 67 */ 68 if (!exynos_fb->exynos_gem_obj && exynos_fb->buffer) 69 exynos_drm_buf_destroy(fb->dev, exynos_fb->buffer); 70 71 kfree(exynos_fb); 72 exynos_fb = NULL; 73 } 74 75 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb, 76 struct drm_file *file_priv, 77 unsigned int *handle) 78 { 79 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 80 81 DRM_DEBUG_KMS("%s\n", __FILE__); 82 83 return drm_gem_handle_create(file_priv, 84 &exynos_fb->exynos_gem_obj->base, handle); 85 } 86 87 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb, 88 struct drm_file *file_priv, unsigned flags, 89 unsigned color, struct drm_clip_rect *clips, 90 unsigned num_clips) 91 { 92 DRM_DEBUG_KMS("%s\n", __FILE__); 93 94 /* TODO */ 95 96 return 0; 97 } 98 99 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = { 100 .destroy = exynos_drm_fb_destroy, 101 .create_handle = exynos_drm_fb_create_handle, 102 .dirty = exynos_drm_fb_dirty, 103 }; 104 105 static struct drm_framebuffer * 106 exynos_drm_fb_init(struct drm_file *file_priv, struct drm_device *dev, 107 struct drm_mode_fb_cmd *mode_cmd) 108 { 109 struct exynos_drm_fb *exynos_fb; 110 struct drm_framebuffer *fb; 111 struct exynos_drm_gem_obj *exynos_gem_obj = NULL; 112 struct drm_gem_object *obj; 113 unsigned int size; 114 int ret; 115 116 DRM_DEBUG_KMS("%s\n", __FILE__); 117 118 mode_cmd->pitch = max(mode_cmd->pitch, 119 mode_cmd->width * (mode_cmd->bpp >> 3)); 120 121 DRM_LOG_KMS("drm fb create(%dx%d)\n", 122 mode_cmd->width, mode_cmd->height); 123 124 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); 125 if (!exynos_fb) { 126 DRM_ERROR("failed to allocate exynos drm framebuffer.\n"); 127 return ERR_PTR(-ENOMEM); 128 } 129 130 fb = &exynos_fb->fb; 131 ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs); 132 if (ret) { 133 DRM_ERROR("failed to initialize framebuffer.\n"); 134 goto err_init; 135 } 136 137 DRM_LOG_KMS("create: fb id: %d\n", fb->base.id); 138 139 size = mode_cmd->pitch * mode_cmd->height; 140 141 /* 142 * mode_cmd->handle could be NULL at booting time or 143 * with user request. if NULL, a new buffer or a gem object 144 * would be allocated. 145 */ 146 if (!mode_cmd->handle) { 147 if (!file_priv) { 148 struct exynos_drm_gem_buf *buffer; 149 150 /* 151 * in case that file_priv is NULL, it allocates 152 * only buffer and this buffer would be used 153 * for default framebuffer. 154 */ 155 buffer = exynos_drm_buf_create(dev, size); 156 if (IS_ERR(buffer)) { 157 ret = PTR_ERR(buffer); 158 goto err_buffer; 159 } 160 161 exynos_fb->buffer = buffer; 162 163 DRM_LOG_KMS("default: dma_addr = 0x%lx, size = 0x%x\n", 164 (unsigned long)buffer->dma_addr, size); 165 166 goto out; 167 } else { 168 exynos_gem_obj = exynos_drm_gem_create(dev, file_priv, 169 &mode_cmd->handle, 170 size); 171 if (IS_ERR(exynos_gem_obj)) { 172 ret = PTR_ERR(exynos_gem_obj); 173 goto err_buffer; 174 } 175 } 176 } else { 177 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle); 178 if (!obj) { 179 DRM_ERROR("failed to lookup gem object.\n"); 180 goto err_buffer; 181 } 182 183 exynos_gem_obj = to_exynos_gem_obj(obj); 184 185 drm_gem_object_unreference_unlocked(obj); 186 } 187 188 /* 189 * if got a exynos_gem_obj from either a handle or 190 * a new creation then exynos_fb->exynos_gem_obj is NULL 191 * so that default framebuffer has no its own gem object, 192 * only its own buffer object. 193 */ 194 exynos_fb->buffer = exynos_gem_obj->buffer; 195 196 DRM_LOG_KMS("dma_addr = 0x%lx, size = 0x%x, gem object = 0x%x\n", 197 (unsigned long)exynos_fb->buffer->dma_addr, size, 198 (unsigned int)&exynos_gem_obj->base); 199 200 out: 201 exynos_fb->exynos_gem_obj = exynos_gem_obj; 202 203 drm_helper_mode_fill_fb_struct(fb, mode_cmd); 204 205 return fb; 206 207 err_buffer: 208 drm_framebuffer_cleanup(fb); 209 210 err_init: 211 kfree(exynos_fb); 212 213 return ERR_PTR(ret); 214 } 215 216 struct drm_framebuffer *exynos_drm_fb_create(struct drm_device *dev, 217 struct drm_file *file_priv, 218 struct drm_mode_fb_cmd *mode_cmd) 219 { 220 DRM_DEBUG_KMS("%s\n", __FILE__); 221 222 return exynos_drm_fb_init(file_priv, dev, mode_cmd); 223 } 224 225 struct exynos_drm_gem_buf *exynos_drm_fb_get_buf(struct drm_framebuffer *fb) 226 { 227 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 228 struct exynos_drm_gem_buf *buffer; 229 230 DRM_DEBUG_KMS("%s\n", __FILE__); 231 232 buffer = exynos_fb->buffer; 233 if (!buffer) 234 return NULL; 235 236 DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n", 237 (unsigned long)buffer->kvaddr, 238 (unsigned long)buffer->dma_addr); 239 240 return buffer; 241 } 242 243 static void exynos_drm_output_poll_changed(struct drm_device *dev) 244 { 245 struct exynos_drm_private *private = dev->dev_private; 246 struct drm_fb_helper *fb_helper = private->fb_helper; 247 248 if (fb_helper) 249 drm_fb_helper_hotplug_event(fb_helper); 250 } 251 252 static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { 253 .fb_create = exynos_drm_fb_create, 254 .output_poll_changed = exynos_drm_output_poll_changed, 255 }; 256 257 void exynos_drm_mode_config_init(struct drm_device *dev) 258 { 259 dev->mode_config.min_width = 0; 260 dev->mode_config.min_height = 0; 261 262 /* 263 * set max width and height as default value(4096x4096). 264 * this value would be used to check framebuffer size limitation 265 * at drm_mode_addfb(). 266 */ 267 dev->mode_config.max_width = 4096; 268 dev->mode_config.max_height = 4096; 269 270 dev->mode_config.funcs = &exynos_drm_mode_config_funcs; 271 } 272 273 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 274 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 275 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 276 MODULE_DESCRIPTION("Samsung SoC DRM FB Driver"); 277 MODULE_LICENSE("GPL"); 278