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_gem.h" 37 38 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb) 39 40 /* 41 * exynos specific framebuffer structure. 42 * 43 * @fb: drm framebuffer obejct. 44 * @exynos_gem_obj: array of exynos specific gem object containing a gem object. 45 */ 46 struct exynos_drm_fb { 47 struct drm_framebuffer fb; 48 struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER]; 49 }; 50 51 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb) 52 { 53 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 54 unsigned int i; 55 56 DRM_DEBUG_KMS("%s\n", __FILE__); 57 58 drm_framebuffer_cleanup(fb); 59 60 for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) { 61 struct drm_gem_object *obj; 62 63 if (exynos_fb->exynos_gem_obj[i] == NULL) 64 continue; 65 66 obj = &exynos_fb->exynos_gem_obj[i]->base; 67 drm_gem_object_unreference_unlocked(obj); 68 } 69 70 kfree(exynos_fb); 71 exynos_fb = NULL; 72 } 73 74 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb, 75 struct drm_file *file_priv, 76 unsigned int *handle) 77 { 78 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 79 80 DRM_DEBUG_KMS("%s\n", __FILE__); 81 82 return drm_gem_handle_create(file_priv, 83 &exynos_fb->exynos_gem_obj[0]->base, handle); 84 } 85 86 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb, 87 struct drm_file *file_priv, unsigned flags, 88 unsigned color, struct drm_clip_rect *clips, 89 unsigned num_clips) 90 { 91 DRM_DEBUG_KMS("%s\n", __FILE__); 92 93 /* TODO */ 94 95 return 0; 96 } 97 98 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = { 99 .destroy = exynos_drm_fb_destroy, 100 .create_handle = exynos_drm_fb_create_handle, 101 .dirty = exynos_drm_fb_dirty, 102 }; 103 104 struct drm_framebuffer * 105 exynos_drm_framebuffer_init(struct drm_device *dev, 106 struct drm_mode_fb_cmd2 *mode_cmd, 107 struct drm_gem_object *obj) 108 { 109 struct exynos_drm_fb *exynos_fb; 110 int ret; 111 112 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); 113 if (!exynos_fb) { 114 DRM_ERROR("failed to allocate exynos drm framebuffer\n"); 115 return ERR_PTR(-ENOMEM); 116 } 117 118 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); 119 if (ret) { 120 DRM_ERROR("failed to initialize framebuffer\n"); 121 return ERR_PTR(ret); 122 } 123 124 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); 125 exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj); 126 127 return &exynos_fb->fb; 128 } 129 130 static struct drm_framebuffer * 131 exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 132 struct drm_mode_fb_cmd2 *mode_cmd) 133 { 134 struct drm_gem_object *obj; 135 struct drm_framebuffer *fb; 136 struct exynos_drm_fb *exynos_fb; 137 int nr; 138 int i; 139 140 DRM_DEBUG_KMS("%s\n", __FILE__); 141 142 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); 143 if (!obj) { 144 DRM_ERROR("failed to lookup gem object\n"); 145 return ERR_PTR(-ENOENT); 146 } 147 148 fb = exynos_drm_framebuffer_init(dev, mode_cmd, obj); 149 if (IS_ERR(fb)) { 150 drm_gem_object_unreference_unlocked(obj); 151 return fb; 152 } 153 154 exynos_fb = to_exynos_fb(fb); 155 nr = exynos_drm_format_num_buffers(fb->pixel_format); 156 157 for (i = 1; i < nr; i++) { 158 obj = drm_gem_object_lookup(dev, file_priv, 159 mode_cmd->handles[i]); 160 if (!obj) { 161 DRM_ERROR("failed to lookup gem object\n"); 162 exynos_drm_fb_destroy(fb); 163 return ERR_PTR(-ENOENT); 164 } 165 166 exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj); 167 } 168 169 return fb; 170 } 171 172 struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb, 173 int index) 174 { 175 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 176 struct exynos_drm_gem_buf *buffer; 177 178 DRM_DEBUG_KMS("%s\n", __FILE__); 179 180 if (index >= MAX_FB_BUFFER) 181 return NULL; 182 183 buffer = exynos_fb->exynos_gem_obj[index]->buffer; 184 if (!buffer) 185 return NULL; 186 187 DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n", 188 (unsigned long)buffer->kvaddr, 189 (unsigned long)buffer->dma_addr); 190 191 return buffer; 192 } 193 194 static void exynos_drm_output_poll_changed(struct drm_device *dev) 195 { 196 struct exynos_drm_private *private = dev->dev_private; 197 struct drm_fb_helper *fb_helper = private->fb_helper; 198 199 if (fb_helper) 200 drm_fb_helper_hotplug_event(fb_helper); 201 } 202 203 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { 204 .fb_create = exynos_user_fb_create, 205 .output_poll_changed = exynos_drm_output_poll_changed, 206 }; 207 208 void exynos_drm_mode_config_init(struct drm_device *dev) 209 { 210 dev->mode_config.min_width = 0; 211 dev->mode_config.min_height = 0; 212 213 /* 214 * set max width and height as default value(4096x4096). 215 * this value would be used to check framebuffer size limitation 216 * at drm_mode_addfb(). 217 */ 218 dev->mode_config.max_width = 4096; 219 dev->mode_config.max_height = 4096; 220 221 dev->mode_config.funcs = &exynos_drm_mode_config_funcs; 222 } 223