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 55 DRM_DEBUG_KMS("%s\n", __FILE__); 56 57 drm_framebuffer_cleanup(fb); 58 59 kfree(exynos_fb); 60 exynos_fb = NULL; 61 } 62 63 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb, 64 struct drm_file *file_priv, 65 unsigned int *handle) 66 { 67 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 68 69 DRM_DEBUG_KMS("%s\n", __FILE__); 70 71 return drm_gem_handle_create(file_priv, 72 &exynos_fb->exynos_gem_obj[0]->base, handle); 73 } 74 75 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb, 76 struct drm_file *file_priv, unsigned flags, 77 unsigned color, struct drm_clip_rect *clips, 78 unsigned num_clips) 79 { 80 DRM_DEBUG_KMS("%s\n", __FILE__); 81 82 /* TODO */ 83 84 return 0; 85 } 86 87 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = { 88 .destroy = exynos_drm_fb_destroy, 89 .create_handle = exynos_drm_fb_create_handle, 90 .dirty = exynos_drm_fb_dirty, 91 }; 92 93 struct drm_framebuffer * 94 exynos_drm_framebuffer_init(struct drm_device *dev, 95 struct drm_mode_fb_cmd2 *mode_cmd, 96 struct drm_gem_object *obj) 97 { 98 struct exynos_drm_fb *exynos_fb; 99 int ret; 100 101 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); 102 if (!exynos_fb) { 103 DRM_ERROR("failed to allocate exynos drm framebuffer\n"); 104 return ERR_PTR(-ENOMEM); 105 } 106 107 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); 108 if (ret) { 109 DRM_ERROR("failed to initialize framebuffer\n"); 110 return ERR_PTR(ret); 111 } 112 113 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); 114 exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj); 115 116 return &exynos_fb->fb; 117 } 118 119 static struct drm_framebuffer * 120 exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 121 struct drm_mode_fb_cmd2 *mode_cmd) 122 { 123 struct drm_gem_object *obj; 124 struct drm_framebuffer *fb; 125 struct exynos_drm_fb *exynos_fb; 126 int nr; 127 int i; 128 129 DRM_DEBUG_KMS("%s\n", __FILE__); 130 131 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); 132 if (!obj) { 133 DRM_ERROR("failed to lookup gem object\n"); 134 return ERR_PTR(-ENOENT); 135 } 136 137 drm_gem_object_unreference_unlocked(obj); 138 139 fb = exynos_drm_framebuffer_init(dev, mode_cmd, obj); 140 if (IS_ERR(fb)) 141 return fb; 142 143 exynos_fb = to_exynos_fb(fb); 144 nr = exynos_drm_format_num_buffers(fb->pixel_format); 145 146 for (i = 1; i < nr; i++) { 147 obj = drm_gem_object_lookup(dev, file_priv, 148 mode_cmd->handles[i]); 149 if (!obj) { 150 DRM_ERROR("failed to lookup gem object\n"); 151 exynos_drm_fb_destroy(fb); 152 return ERR_PTR(-ENOENT); 153 } 154 155 drm_gem_object_unreference_unlocked(obj); 156 157 exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj); 158 } 159 160 return fb; 161 } 162 163 struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb, 164 int index) 165 { 166 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); 167 struct exynos_drm_gem_buf *buffer; 168 169 DRM_DEBUG_KMS("%s\n", __FILE__); 170 171 if (index >= MAX_FB_BUFFER) 172 return NULL; 173 174 buffer = exynos_fb->exynos_gem_obj[index]->buffer; 175 if (!buffer) 176 return NULL; 177 178 DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n", 179 (unsigned long)buffer->kvaddr, 180 (unsigned long)buffer->dma_addr); 181 182 return buffer; 183 } 184 185 static void exynos_drm_output_poll_changed(struct drm_device *dev) 186 { 187 struct exynos_drm_private *private = dev->dev_private; 188 struct drm_fb_helper *fb_helper = private->fb_helper; 189 190 if (fb_helper) 191 drm_fb_helper_hotplug_event(fb_helper); 192 } 193 194 static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { 195 .fb_create = exynos_user_fb_create, 196 .output_poll_changed = exynos_drm_output_poll_changed, 197 }; 198 199 void exynos_drm_mode_config_init(struct drm_device *dev) 200 { 201 dev->mode_config.min_width = 0; 202 dev->mode_config.min_height = 0; 203 204 /* 205 * set max width and height as default value(4096x4096). 206 * this value would be used to check framebuffer size limitation 207 * at drm_mode_addfb(). 208 */ 209 dev->mode_config.max_width = 4096; 210 dev->mode_config.max_height = 4096; 211 212 dev->mode_config.funcs = &exynos_drm_mode_config_funcs; 213 } 214 215 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 216 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 217 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 218 MODULE_DESCRIPTION("Samsung SoC DRM FB Driver"); 219 MODULE_LICENSE("GPL"); 220