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