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_mode_fb_cmd2 *mode_cmd, 70 struct drm_gem_object *obj) 71 { 72 int ret; 73 74 vgfb->base.obj[0] = obj; 75 76 drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd); 77 78 ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs); 79 if (ret) { 80 vgfb->base.obj[0] = NULL; 81 return ret; 82 } 83 return 0; 84 } 85 86 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc) 87 { 88 struct drm_device *dev = crtc->dev; 89 struct virtio_gpu_device *vgdev = dev->dev_private; 90 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 91 92 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 93 crtc->mode.hdisplay, 94 crtc->mode.vdisplay, 0, 0); 95 virtio_gpu_notify(vgdev); 96 } 97 98 static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc, 99 struct drm_atomic_state *state) 100 { 101 } 102 103 static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc, 104 struct drm_atomic_state *state) 105 { 106 struct drm_device *dev = crtc->dev; 107 struct virtio_gpu_device *vgdev = dev->dev_private; 108 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 109 110 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0); 111 virtio_gpu_notify(vgdev); 112 } 113 114 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc, 115 struct drm_atomic_state *state) 116 { 117 return 0; 118 } 119 120 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc, 121 struct drm_atomic_state *state) 122 { 123 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 124 crtc); 125 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 126 127 /* 128 * virtio-gpu can't do modeset and plane update operations 129 * independent from each other. So the actual modeset happens 130 * in the plane update callback, and here we just check 131 * whenever we must force the modeset. 132 */ 133 if (drm_atomic_crtc_needs_modeset(crtc_state)) { 134 output->needs_modeset = true; 135 } 136 } 137 138 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = { 139 .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb, 140 .atomic_check = virtio_gpu_crtc_atomic_check, 141 .atomic_flush = virtio_gpu_crtc_atomic_flush, 142 .atomic_enable = virtio_gpu_crtc_atomic_enable, 143 .atomic_disable = virtio_gpu_crtc_atomic_disable, 144 }; 145 146 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder, 147 struct drm_display_mode *mode, 148 struct drm_display_mode *adjusted_mode) 149 { 150 } 151 152 static void virtio_gpu_enc_enable(struct drm_encoder *encoder) 153 { 154 } 155 156 static void virtio_gpu_enc_disable(struct drm_encoder *encoder) 157 { 158 } 159 160 static int virtio_gpu_conn_get_modes(struct drm_connector *connector) 161 { 162 struct virtio_gpu_output *output = 163 drm_connector_to_virtio_gpu_output(connector); 164 struct drm_display_mode *mode = NULL; 165 int count, width, height; 166 167 count = drm_edid_connector_add_modes(connector); 168 if (count) 169 return count; 170 171 width = le32_to_cpu(output->info.r.width); 172 height = le32_to_cpu(output->info.r.height); 173 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); 174 175 if (width == 0 || height == 0) { 176 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); 177 } else { 178 DRM_DEBUG("add mode: %dx%d\n", width, height); 179 mode = drm_cvt_mode(connector->dev, width, height, 60, 180 false, false, false); 181 if (!mode) 182 return count; 183 mode->type |= DRM_MODE_TYPE_PREFERRED; 184 drm_mode_probed_add(connector, mode); 185 count++; 186 } 187 188 return count; 189 } 190 191 static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector, 192 struct drm_display_mode *mode) 193 { 194 struct virtio_gpu_output *output = 195 drm_connector_to_virtio_gpu_output(connector); 196 int width, height; 197 198 width = le32_to_cpu(output->info.r.width); 199 height = le32_to_cpu(output->info.r.height); 200 201 if (!(mode->type & DRM_MODE_TYPE_PREFERRED)) 202 return MODE_OK; 203 if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF) 204 return MODE_OK; 205 if (mode->hdisplay <= width && mode->hdisplay >= width - 16 && 206 mode->vdisplay <= height && mode->vdisplay >= height - 16) 207 return MODE_OK; 208 209 DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay); 210 return MODE_BAD; 211 } 212 213 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = { 214 .mode_set = virtio_gpu_enc_mode_set, 215 .enable = virtio_gpu_enc_enable, 216 .disable = virtio_gpu_enc_disable, 217 }; 218 219 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = { 220 .get_modes = virtio_gpu_conn_get_modes, 221 .mode_valid = virtio_gpu_conn_mode_valid, 222 }; 223 224 static enum drm_connector_status virtio_gpu_conn_detect( 225 struct drm_connector *connector, 226 bool force) 227 { 228 struct virtio_gpu_output *output = 229 drm_connector_to_virtio_gpu_output(connector); 230 231 if (output->info.enabled) 232 return connector_status_connected; 233 else 234 return connector_status_disconnected; 235 } 236 237 static void virtio_gpu_conn_destroy(struct drm_connector *connector) 238 { 239 drm_connector_unregister(connector); 240 drm_connector_cleanup(connector); 241 } 242 243 static const struct drm_connector_funcs virtio_gpu_connector_funcs = { 244 .detect = virtio_gpu_conn_detect, 245 .fill_modes = drm_helper_probe_single_connector_modes, 246 .destroy = virtio_gpu_conn_destroy, 247 .reset = drm_atomic_helper_connector_reset, 248 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 249 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 250 }; 251 252 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index) 253 { 254 struct drm_device *dev = vgdev->ddev; 255 struct virtio_gpu_output *output = vgdev->outputs + index; 256 struct drm_connector *connector = &output->conn; 257 struct drm_encoder *encoder = &output->enc; 258 struct drm_crtc *crtc = &output->crtc; 259 struct drm_plane *primary, *cursor; 260 261 output->index = index; 262 if (index == 0) { 263 output->info.enabled = cpu_to_le32(true); 264 output->info.r.width = cpu_to_le32(XRES_DEF); 265 output->info.r.height = cpu_to_le32(YRES_DEF); 266 } 267 268 primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index); 269 if (IS_ERR(primary)) 270 return PTR_ERR(primary); 271 cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index); 272 if (IS_ERR(cursor)) 273 return PTR_ERR(cursor); 274 drm_crtc_init_with_planes(dev, crtc, primary, cursor, 275 &virtio_gpu_crtc_funcs, NULL); 276 drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs); 277 278 drm_connector_init(dev, connector, &virtio_gpu_connector_funcs, 279 DRM_MODE_CONNECTOR_VIRTUAL); 280 drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs); 281 if (vgdev->has_edid) 282 drm_connector_attach_edid_property(connector); 283 284 drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL); 285 drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs); 286 encoder->possible_crtcs = 1 << index; 287 288 drm_connector_attach_encoder(connector, encoder); 289 drm_connector_register(connector); 290 return 0; 291 } 292 293 static struct drm_framebuffer * 294 virtio_gpu_user_framebuffer_create(struct drm_device *dev, 295 struct drm_file *file_priv, 296 const struct drm_mode_fb_cmd2 *mode_cmd) 297 { 298 struct drm_gem_object *obj = NULL; 299 struct virtio_gpu_framebuffer *virtio_gpu_fb; 300 int ret; 301 302 if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 && 303 mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888) 304 return ERR_PTR(-ENOENT); 305 306 /* lookup object associated with res handle */ 307 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]); 308 if (!obj) 309 return ERR_PTR(-EINVAL); 310 311 virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL); 312 if (virtio_gpu_fb == NULL) { 313 drm_gem_object_put(obj); 314 return ERR_PTR(-ENOMEM); 315 } 316 317 ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj); 318 if (ret) { 319 kfree(virtio_gpu_fb); 320 drm_gem_object_put(obj); 321 return NULL; 322 } 323 324 return &virtio_gpu_fb->base; 325 } 326 327 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = { 328 .fb_create = virtio_gpu_user_framebuffer_create, 329 .atomic_check = drm_atomic_helper_check, 330 .atomic_commit = drm_atomic_helper_commit, 331 }; 332 333 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) 334 { 335 int i, ret; 336 337 if (!vgdev->num_scanouts) 338 return 0; 339 340 ret = drmm_mode_config_init(vgdev->ddev); 341 if (ret) 342 return ret; 343 344 vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true; 345 vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs; 346 347 /* modes will be validated against the framebuffer size */ 348 vgdev->ddev->mode_config.min_width = XRES_MIN; 349 vgdev->ddev->mode_config.min_height = YRES_MIN; 350 vgdev->ddev->mode_config.max_width = XRES_MAX; 351 vgdev->ddev->mode_config.max_height = YRES_MAX; 352 353 vgdev->ddev->mode_config.fb_modifiers_not_supported = true; 354 355 for (i = 0 ; i < vgdev->num_scanouts; ++i) 356 vgdev_output_init(vgdev, i); 357 358 drm_mode_config_reset(vgdev->ddev); 359 return 0; 360 } 361 362 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev) 363 { 364 int i; 365 366 if (!vgdev->num_scanouts) 367 return; 368 369 for (i = 0 ; i < vgdev->num_scanouts; ++i) 370 drm_edid_free(vgdev->outputs[i].drm_edid); 371 } 372