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