1 /* 2 * Copyright (C) 2015 Red Hat, Inc. 3 * All Rights Reserved. 4 * 5 * Authors: 6 * Dave Airlie 7 * Alon Levy 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 shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 * OTHER DEALINGS IN THE SOFTWARE. 26 */ 27 28 #include <drm/drm_atomic_helper.h> 29 #include <drm/drm_damage_helper.h> 30 #include <drm/drm_fourcc.h> 31 #include <drm/drm_gem_framebuffer_helper.h> 32 #include <drm/drm_probe_helper.h> 33 #include <drm/drm_vblank.h> 34 35 #include "virtgpu_drv.h" 36 37 #define XRES_MIN 32 38 #define YRES_MIN 32 39 40 #define XRES_DEF 1024 41 #define YRES_DEF 768 42 43 #define XRES_MAX 8192 44 #define YRES_MAX 8192 45 46 static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = { 47 .set_config = drm_atomic_helper_set_config, 48 .destroy = drm_crtc_cleanup, 49 50 .page_flip = drm_atomic_helper_page_flip, 51 .reset = drm_atomic_helper_crtc_reset, 52 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 53 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 54 }; 55 56 static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = { 57 .create_handle = drm_gem_fb_create_handle, 58 .destroy = drm_gem_fb_destroy, 59 .dirty = drm_atomic_helper_dirtyfb, 60 }; 61 62 int 63 virtio_gpu_framebuffer_init(struct drm_device *dev, 64 struct virtio_gpu_framebuffer *vgfb, 65 const struct drm_mode_fb_cmd2 *mode_cmd, 66 struct drm_gem_object *obj) 67 { 68 int ret; 69 70 vgfb->base.obj[0] = obj; 71 72 drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd); 73 74 ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs); 75 if (ret) { 76 vgfb->base.obj[0] = NULL; 77 return ret; 78 } 79 return 0; 80 } 81 82 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc) 83 { 84 struct drm_device *dev = crtc->dev; 85 struct virtio_gpu_device *vgdev = dev->dev_private; 86 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 87 88 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 89 crtc->mode.hdisplay, 90 crtc->mode.vdisplay, 0, 0); 91 } 92 93 static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc, 94 struct drm_crtc_state *old_state) 95 { 96 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 97 98 output->enabled = true; 99 } 100 101 static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc, 102 struct drm_crtc_state *old_state) 103 { 104 struct drm_device *dev = crtc->dev; 105 struct virtio_gpu_device *vgdev = dev->dev_private; 106 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 107 108 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0); 109 output->enabled = false; 110 } 111 112 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc, 113 struct drm_crtc_state *state) 114 { 115 return 0; 116 } 117 118 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc, 119 struct drm_crtc_state *old_state) 120 { 121 unsigned long flags; 122 123 spin_lock_irqsave(&crtc->dev->event_lock, flags); 124 if (crtc->state->event) 125 drm_crtc_send_vblank_event(crtc, crtc->state->event); 126 crtc->state->event = NULL; 127 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 128 } 129 130 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = { 131 .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb, 132 .atomic_check = virtio_gpu_crtc_atomic_check, 133 .atomic_flush = virtio_gpu_crtc_atomic_flush, 134 .atomic_enable = virtio_gpu_crtc_atomic_enable, 135 .atomic_disable = virtio_gpu_crtc_atomic_disable, 136 }; 137 138 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder, 139 struct drm_display_mode *mode, 140 struct drm_display_mode *adjusted_mode) 141 { 142 } 143 144 static void virtio_gpu_enc_enable(struct drm_encoder *encoder) 145 { 146 } 147 148 static void virtio_gpu_enc_disable(struct drm_encoder *encoder) 149 { 150 } 151 152 static int virtio_gpu_conn_get_modes(struct drm_connector *connector) 153 { 154 struct virtio_gpu_output *output = 155 drm_connector_to_virtio_gpu_output(connector); 156 struct drm_display_mode *mode = NULL; 157 int count, width, height; 158 159 if (output->edid) { 160 count = drm_add_edid_modes(connector, output->edid); 161 if (count) 162 return count; 163 } 164 165 width = le32_to_cpu(output->info.r.width); 166 height = le32_to_cpu(output->info.r.height); 167 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); 168 169 if (width == 0 || height == 0) { 170 width = XRES_DEF; 171 height = YRES_DEF; 172 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); 173 } else { 174 DRM_DEBUG("add mode: %dx%d\n", width, height); 175 mode = drm_cvt_mode(connector->dev, width, height, 60, 176 false, false, false); 177 mode->type |= DRM_MODE_TYPE_PREFERRED; 178 drm_mode_probed_add(connector, mode); 179 count++; 180 } 181 182 return count; 183 } 184 185 static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector, 186 struct drm_display_mode *mode) 187 { 188 struct virtio_gpu_output *output = 189 drm_connector_to_virtio_gpu_output(connector); 190 int width, height; 191 192 width = le32_to_cpu(output->info.r.width); 193 height = le32_to_cpu(output->info.r.height); 194 195 if (!(mode->type & DRM_MODE_TYPE_PREFERRED)) 196 return MODE_OK; 197 if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF) 198 return MODE_OK; 199 if (mode->hdisplay <= width && mode->hdisplay >= width - 16 && 200 mode->vdisplay <= height && mode->vdisplay >= height - 16) 201 return MODE_OK; 202 203 DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay); 204 return MODE_BAD; 205 } 206 207 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = { 208 .mode_set = virtio_gpu_enc_mode_set, 209 .enable = virtio_gpu_enc_enable, 210 .disable = virtio_gpu_enc_disable, 211 }; 212 213 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = { 214 .get_modes = virtio_gpu_conn_get_modes, 215 .mode_valid = virtio_gpu_conn_mode_valid, 216 }; 217 218 static enum drm_connector_status virtio_gpu_conn_detect( 219 struct drm_connector *connector, 220 bool force) 221 { 222 struct virtio_gpu_output *output = 223 drm_connector_to_virtio_gpu_output(connector); 224 225 if (output->info.enabled) 226 return connector_status_connected; 227 else 228 return connector_status_disconnected; 229 } 230 231 static void virtio_gpu_conn_destroy(struct drm_connector *connector) 232 { 233 drm_connector_unregister(connector); 234 drm_connector_cleanup(connector); 235 } 236 237 static const struct drm_connector_funcs virtio_gpu_connector_funcs = { 238 .detect = virtio_gpu_conn_detect, 239 .fill_modes = drm_helper_probe_single_connector_modes, 240 .destroy = virtio_gpu_conn_destroy, 241 .reset = drm_atomic_helper_connector_reset, 242 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 243 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 244 }; 245 246 static const struct drm_encoder_funcs virtio_gpu_enc_funcs = { 247 .destroy = drm_encoder_cleanup, 248 }; 249 250 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index) 251 { 252 struct drm_device *dev = vgdev->ddev; 253 struct virtio_gpu_output *output = vgdev->outputs + index; 254 struct drm_connector *connector = &output->conn; 255 struct drm_encoder *encoder = &output->enc; 256 struct drm_crtc *crtc = &output->crtc; 257 struct drm_plane *primary, *cursor; 258 259 output->index = index; 260 if (index == 0) { 261 output->info.enabled = cpu_to_le32(true); 262 output->info.r.width = cpu_to_le32(XRES_DEF); 263 output->info.r.height = cpu_to_le32(YRES_DEF); 264 } 265 266 primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index); 267 if (IS_ERR(primary)) 268 return PTR_ERR(primary); 269 cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index); 270 if (IS_ERR(cursor)) 271 return PTR_ERR(cursor); 272 drm_crtc_init_with_planes(dev, crtc, primary, cursor, 273 &virtio_gpu_crtc_funcs, NULL); 274 drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs); 275 276 drm_connector_init(dev, connector, &virtio_gpu_connector_funcs, 277 DRM_MODE_CONNECTOR_VIRTUAL); 278 drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs); 279 if (vgdev->has_edid) 280 drm_connector_attach_edid_property(connector); 281 282 drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs, 283 DRM_MODE_ENCODER_VIRTUAL, NULL); 284 drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs); 285 encoder->possible_crtcs = 1 << index; 286 287 drm_connector_attach_encoder(connector, encoder); 288 drm_connector_register(connector); 289 return 0; 290 } 291 292 static struct drm_framebuffer * 293 virtio_gpu_user_framebuffer_create(struct drm_device *dev, 294 struct drm_file *file_priv, 295 const struct drm_mode_fb_cmd2 *mode_cmd) 296 { 297 struct drm_gem_object *obj = NULL; 298 struct virtio_gpu_framebuffer *virtio_gpu_fb; 299 int ret; 300 301 if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 && 302 mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888) 303 return ERR_PTR(-ENOENT); 304 305 /* lookup object associated with res handle */ 306 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]); 307 if (!obj) 308 return ERR_PTR(-EINVAL); 309 310 virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL); 311 if (virtio_gpu_fb == NULL) 312 return ERR_PTR(-ENOMEM); 313 314 ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj); 315 if (ret) { 316 kfree(virtio_gpu_fb); 317 drm_gem_object_put_unlocked(obj); 318 return NULL; 319 } 320 321 return &virtio_gpu_fb->base; 322 } 323 324 static void vgdev_atomic_commit_tail(struct drm_atomic_state *state) 325 { 326 struct drm_device *dev = state->dev; 327 328 drm_atomic_helper_commit_modeset_disables(dev, state); 329 drm_atomic_helper_commit_modeset_enables(dev, state); 330 drm_atomic_helper_commit_planes(dev, state, 0); 331 332 drm_atomic_helper_commit_hw_done(state); 333 334 drm_atomic_helper_wait_for_vblanks(dev, state); 335 drm_atomic_helper_cleanup_planes(dev, state); 336 } 337 338 static const struct drm_mode_config_helper_funcs virtio_mode_config_helpers = { 339 .atomic_commit_tail = vgdev_atomic_commit_tail, 340 }; 341 342 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = { 343 .fb_create = virtio_gpu_user_framebuffer_create, 344 .atomic_check = drm_atomic_helper_check, 345 .atomic_commit = drm_atomic_helper_commit, 346 }; 347 348 void virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) 349 { 350 int i; 351 352 drm_mode_config_init(vgdev->ddev); 353 vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true; 354 vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs; 355 vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers; 356 357 /* modes will be validated against the framebuffer size */ 358 vgdev->ddev->mode_config.min_width = XRES_MIN; 359 vgdev->ddev->mode_config.min_height = YRES_MIN; 360 vgdev->ddev->mode_config.max_width = XRES_MAX; 361 vgdev->ddev->mode_config.max_height = YRES_MAX; 362 363 for (i = 0 ; i < vgdev->num_scanouts; ++i) 364 vgdev_output_init(vgdev, i); 365 366 drm_mode_config_reset(vgdev->ddev); 367 } 368 369 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev) 370 { 371 int i; 372 373 for (i = 0 ; i < vgdev->num_scanouts; ++i) 374 kfree(vgdev->outputs[i].edid); 375 drm_atomic_helper_shutdown(vgdev->ddev); 376 drm_mode_config_cleanup(vgdev->ddev); 377 } 378