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