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_edid.h> 31 #include <drm/drm_encoder.h> 32 #include <drm/drm_fourcc.h> 33 #include <drm/drm_gem_framebuffer_helper.h> 34 #include <drm/drm_print.h> 35 #include <drm/drm_probe_helper.h> 36 #include <drm/drm_vblank.h> 37 #include <drm/drm_vblank_helper.h> 38 39 #include "virtgpu_drv.h" 40 41 #define XRES_MIN 32 42 #define YRES_MIN 32 43 44 #define XRES_DEF 1024 45 #define YRES_DEF 768 46 47 #define XRES_MAX 8192 48 #define YRES_MAX 8192 49 50 #define drm_connector_to_virtio_gpu_output(x) \ 51 container_of(x, struct virtio_gpu_output, conn) 52 53 static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = { 54 .set_config = drm_atomic_helper_set_config, 55 .destroy = drm_crtc_cleanup, 56 57 .page_flip = drm_atomic_helper_page_flip, 58 .atomic_create_state = drm_atomic_helper_crtc_create_state, 59 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 60 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 61 DRM_CRTC_VBLANK_TIMER_FUNCS, 62 }; 63 64 static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = { 65 .create_handle = drm_gem_fb_create_handle, 66 .destroy = drm_gem_fb_destroy, 67 .dirty = drm_atomic_helper_dirtyfb, 68 }; 69 70 static int 71 virtio_gpu_framebuffer_init(struct drm_device *dev, 72 struct virtio_gpu_framebuffer *vgfb, 73 const struct drm_format_info *info, 74 const struct drm_mode_fb_cmd2 *mode_cmd, 75 struct drm_gem_object *obj) 76 { 77 int ret; 78 79 vgfb->base.obj[0] = obj; 80 81 drm_helper_mode_fill_fb_struct(dev, &vgfb->base, info, mode_cmd); 82 83 ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs); 84 if (ret) { 85 vgfb->base.obj[0] = NULL; 86 return ret; 87 } 88 return 0; 89 } 90 91 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc) 92 { 93 struct drm_device *dev = crtc->dev; 94 struct virtio_gpu_device *vgdev = dev->dev_private; 95 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 96 97 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 98 crtc->mode.hdisplay, 99 crtc->mode.vdisplay, 0, 0); 100 virtio_gpu_notify(vgdev); 101 } 102 103 static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc, 104 struct drm_atomic_commit *state) 105 { 106 drm_crtc_vblank_on(crtc); 107 } 108 109 static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc, 110 struct drm_atomic_commit *state) 111 { 112 struct drm_device *dev = crtc->dev; 113 struct virtio_gpu_device *vgdev = dev->dev_private; 114 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 115 116 drm_crtc_vblank_off(crtc); 117 118 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0); 119 virtio_gpu_notify(vgdev); 120 } 121 122 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc, 123 struct drm_atomic_commit *state) 124 { 125 return 0; 126 } 127 128 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc, 129 struct drm_atomic_commit *state) 130 { 131 struct drm_device *dev = crtc->dev; 132 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc); 133 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 134 struct drm_pending_vblank_event *event; 135 136 /* 137 * virtio-gpu can't do modeset and plane update operations 138 * independent from each other. So the actual modeset happens 139 * in the plane update callback, and here we just check 140 * whenever we must force the modeset. 141 */ 142 if (drm_atomic_crtc_needs_modeset(crtc_state)) 143 output->needs_modeset = true; 144 145 spin_lock_irq(&dev->event_lock); 146 147 event = crtc_state->event; 148 crtc_state->event = NULL; 149 150 if (event) { 151 if (drm_crtc_vblank_get(crtc) == 0) 152 drm_crtc_arm_vblank_event(crtc, event); 153 else 154 drm_crtc_send_vblank_event(crtc, event); 155 } 156 157 spin_unlock_irq(&dev->event_lock); 158 } 159 160 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = { 161 .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb, 162 .atomic_check = virtio_gpu_crtc_atomic_check, 163 .atomic_flush = virtio_gpu_crtc_atomic_flush, 164 .atomic_enable = virtio_gpu_crtc_atomic_enable, 165 .atomic_disable = virtio_gpu_crtc_atomic_disable, 166 }; 167 168 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder, 169 struct drm_display_mode *mode, 170 struct drm_display_mode *adjusted_mode) 171 { 172 } 173 174 static void virtio_gpu_enc_enable(struct drm_encoder *encoder) 175 { 176 } 177 178 static void virtio_gpu_enc_disable(struct drm_encoder *encoder) 179 { 180 } 181 182 static int virtio_gpu_conn_get_modes(struct drm_connector *connector) 183 { 184 struct virtio_gpu_output *output = 185 drm_connector_to_virtio_gpu_output(connector); 186 struct drm_display_mode *mode = NULL; 187 int count, width, height; 188 189 count = drm_edid_connector_add_modes(connector); 190 if (count) 191 return count; 192 193 width = le32_to_cpu(output->info.r.width); 194 height = le32_to_cpu(output->info.r.height); 195 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); 196 197 if (width == 0 || height == 0) { 198 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); 199 } else { 200 DRM_DEBUG("add mode: %dx%d\n", width, height); 201 mode = drm_cvt_mode(connector->dev, width, height, 60, 202 false, false, false); 203 if (!mode) 204 return count; 205 mode->type |= DRM_MODE_TYPE_PREFERRED; 206 drm_mode_probed_add(connector, mode); 207 count++; 208 } 209 210 return count; 211 } 212 213 static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector, 214 const struct drm_display_mode *mode) 215 { 216 struct virtio_gpu_output *output = 217 drm_connector_to_virtio_gpu_output(connector); 218 int width, height; 219 220 width = le32_to_cpu(output->info.r.width); 221 height = le32_to_cpu(output->info.r.height); 222 223 if (!(mode->type & DRM_MODE_TYPE_PREFERRED)) 224 return MODE_OK; 225 if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF) 226 return MODE_OK; 227 if (mode->hdisplay <= width && mode->hdisplay >= width - 16 && 228 mode->vdisplay <= height && mode->vdisplay >= height - 16) 229 return MODE_OK; 230 231 DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay); 232 return MODE_BAD; 233 } 234 235 static const struct drm_encoder_funcs virtio_gpu_enc_funcs = { 236 .destroy = drm_encoder_cleanup, 237 }; 238 239 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = { 240 .mode_set = virtio_gpu_enc_mode_set, 241 .enable = virtio_gpu_enc_enable, 242 .disable = virtio_gpu_enc_disable, 243 }; 244 245 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = { 246 .get_modes = virtio_gpu_conn_get_modes, 247 .mode_valid = virtio_gpu_conn_mode_valid, 248 }; 249 250 static enum drm_connector_status virtio_gpu_conn_detect( 251 struct drm_connector *connector, 252 bool force) 253 { 254 struct virtio_gpu_output *output = 255 drm_connector_to_virtio_gpu_output(connector); 256 257 if (output->info.enabled) 258 return connector_status_connected; 259 else 260 return connector_status_disconnected; 261 } 262 263 static void virtio_gpu_conn_destroy(struct drm_connector *connector) 264 { 265 drm_connector_unregister(connector); 266 drm_connector_cleanup(connector); 267 } 268 269 static const struct drm_connector_funcs virtio_gpu_connector_funcs = { 270 .detect = virtio_gpu_conn_detect, 271 .fill_modes = drm_helper_probe_single_connector_modes, 272 .destroy = virtio_gpu_conn_destroy, 273 .reset = drm_atomic_helper_connector_reset, 274 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 275 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 276 }; 277 278 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index) 279 { 280 struct drm_device *dev = vgdev->ddev; 281 struct virtio_gpu_output *output = vgdev->outputs + index; 282 struct drm_connector *connector = &output->conn; 283 struct drm_encoder *encoder = &output->enc; 284 struct drm_crtc *crtc = &output->crtc; 285 struct drm_plane *primary, *cursor; 286 int ret; 287 288 output->index = index; 289 if (index == 0) { 290 output->info.enabled = cpu_to_le32(true); 291 output->info.r.width = cpu_to_le32(XRES_DEF); 292 output->info.r.height = cpu_to_le32(YRES_DEF); 293 } 294 295 primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index); 296 if (IS_ERR(primary)) 297 return PTR_ERR(primary); 298 cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index); 299 if (IS_ERR(cursor)) 300 return PTR_ERR(cursor); 301 ret = drm_crtc_init_with_planes(dev, crtc, primary, cursor, 302 &virtio_gpu_crtc_funcs, NULL); 303 if (ret) 304 return ret; 305 drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs); 306 307 drm_connector_init(dev, connector, &virtio_gpu_connector_funcs, 308 DRM_MODE_CONNECTOR_VIRTUAL); 309 drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs); 310 if (vgdev->has_edid) 311 drm_connector_attach_edid_property(connector); 312 313 ret = drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs, 314 DRM_MODE_ENCODER_VIRTUAL, NULL); 315 if (ret) 316 return ret; 317 318 drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs); 319 encoder->possible_crtcs = 1 << index; 320 321 drm_connector_attach_encoder(connector, encoder); 322 drm_connector_register(connector); 323 return 0; 324 } 325 326 static struct drm_framebuffer * 327 virtio_gpu_user_framebuffer_create(struct drm_device *dev, 328 struct drm_file *file_priv, 329 const struct drm_format_info *info, 330 const struct drm_mode_fb_cmd2 *mode_cmd) 331 { 332 struct drm_gem_object *obj = NULL; 333 struct virtio_gpu_framebuffer *virtio_gpu_fb; 334 int ret; 335 336 if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 && 337 mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888) 338 return ERR_PTR(-ENOENT); 339 340 /* lookup object associated with res handle */ 341 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]); 342 if (!obj) 343 return ERR_PTR(-EINVAL); 344 345 virtio_gpu_fb = kzalloc_obj(*virtio_gpu_fb); 346 if (virtio_gpu_fb == NULL) { 347 drm_gem_object_put(obj); 348 return ERR_PTR(-ENOMEM); 349 } 350 351 ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, info, mode_cmd, obj); 352 if (ret) { 353 kfree(virtio_gpu_fb); 354 drm_gem_object_put(obj); 355 return ERR_PTR(ret); 356 } 357 358 return &virtio_gpu_fb->base; 359 } 360 361 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = { 362 .fb_create = virtio_gpu_user_framebuffer_create, 363 .atomic_check = drm_atomic_helper_check, 364 .atomic_commit = drm_atomic_helper_commit, 365 }; 366 367 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) 368 { 369 int i, ret; 370 371 if (!vgdev->num_scanouts) 372 return 0; 373 374 ret = drmm_mode_config_init(vgdev->ddev); 375 if (ret) 376 return ret; 377 378 vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true; 379 vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs; 380 381 /* modes will be validated against the framebuffer size */ 382 vgdev->ddev->mode_config.min_width = XRES_MIN; 383 vgdev->ddev->mode_config.min_height = YRES_MIN; 384 vgdev->ddev->mode_config.max_width = XRES_MAX; 385 vgdev->ddev->mode_config.max_height = YRES_MAX; 386 387 vgdev->ddev->mode_config.fb_modifiers_not_supported = true; 388 389 for (i = 0; i < vgdev->num_scanouts; ++i) { 390 ret = vgdev_output_init(vgdev, i); 391 if (ret) 392 return ret; 393 } 394 395 ret = drm_vblank_init(vgdev->ddev, vgdev->num_scanouts); 396 if (ret) 397 return ret; 398 399 drm_mode_config_reset(vgdev->ddev); 400 return 0; 401 } 402 403 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev) 404 { 405 int i; 406 407 if (!vgdev->num_scanouts) 408 return; 409 410 for (i = 0 ; i < vgdev->num_scanouts; ++i) 411 drm_edid_free(vgdev->outputs[i].drm_edid); 412 } 413