drivers/gpu/drm/vboxvideo/vbox

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This source file includes following definitions.
vbox_do_modeset
vbox_set_view
vbox_set_up_input_mapping
vbox_crtc_set_base_and_mode
vbox_crtc_atomic_enable
vbox_crtc_atomic_disable
vbox_crtc_atomic_flush
vbox_crtc_destroy
vbox_primary_atomic_check
vbox_primary_atomic_update
vbox_primary_atomic_disable
vbox_primary_prepare_fb
vbox_primary_cleanup_fb
vbox_cursor_atomic_check
copy_cursor_image
vbox_cursor_atomic_update
vbox_cursor_atomic_disable
vbox_cursor_prepare_fb
vbox_cursor_cleanup_fb
vbox_create_plane
vbox_crtc_init
vbox_encoder_destroy
vbox_encoder_init
vbox_set_edid
vbox_get_modes
vbox_connector_destroy
vbox_connector_detect
vbox_fill_modes
vbox_connector_init
vbox_user_framebuffer_create
vbox_mode_init
vbox_mode_fini
   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright (C) 2013-2017 Oracle Corporation
   4  * This file is based on ast_mode.c
   5  * Copyright 2012 Red Hat Inc.
   6  * Parts based on xf86-video-ast
   7  * Copyright (c) 2005 ASPEED Technology Inc.
   8  * Authors: Dave Airlie <airlied@redhat.com>
   9  *          Michael Thayer <michael.thayer@oracle.com,
  10  *          Hans de Goede <hdegoede@redhat.com>
  11  */
  12 #include <linux/export.h>
  13 
  14 #include <drm/drm_atomic.h>
  15 #include <drm/drm_atomic_helper.h>
  16 #include <drm/drm_fourcc.h>
  17 #include <drm/drm_plane_helper.h>
  18 #include <drm/drm_probe_helper.h>
  19 #include <drm/drm_vblank.h>
  20 
  21 #include "hgsmi_channels.h"
  22 #include "vbox_drv.h"
  23 #include "vboxvideo.h"
  24 
  25 /*
  26  * Set a graphics mode.  Poke any required values into registers, do an HGSMI
  27  * mode set and tell the host we support advanced graphics functions.
  28  */
  29 static void vbox_do_modeset(struct drm_crtc *crtc)
  30 {
  31         struct drm_framebuffer *fb = crtc->primary->state->fb;
  32         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  33         struct vbox_private *vbox;
  34         int width, height, bpp, pitch;
  35         u16 flags;
  36         s32 x_offset, y_offset;
  37 
  38         vbox = crtc->dev->dev_private;
  39         width = vbox_crtc->width ? vbox_crtc->width : 640;
  40         height = vbox_crtc->height ? vbox_crtc->height : 480;
  41         bpp = fb ? fb->format->cpp[0] * 8 : 32;
  42         pitch = fb ? fb->pitches[0] : width * bpp / 8;
  43         x_offset = vbox->single_framebuffer ? vbox_crtc->x : vbox_crtc->x_hint;
  44         y_offset = vbox->single_framebuffer ? vbox_crtc->y : vbox_crtc->y_hint;
  45 
  46         /*
  47          * This is the old way of setting graphics modes.  It assumed one screen
  48          * and a frame-buffer at the start of video RAM.  On older versions of
  49          * VirtualBox, certain parts of the code still assume that the first
  50          * screen is programmed this way, so try to fake it.
  51          */
  52         if (vbox_crtc->crtc_id == 0 && fb &&
  53             vbox_crtc->fb_offset / pitch < 0xffff - crtc->y &&
  54             vbox_crtc->fb_offset % (bpp / 8) == 0) {
  55                 vbox_write_ioport(VBE_DISPI_INDEX_XRES, width);
  56                 vbox_write_ioport(VBE_DISPI_INDEX_YRES, height);
  57                 vbox_write_ioport(VBE_DISPI_INDEX_VIRT_WIDTH, pitch * 8 / bpp);
  58                 vbox_write_ioport(VBE_DISPI_INDEX_BPP, bpp);
  59                 vbox_write_ioport(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED);
  60                 vbox_write_ioport(VBE_DISPI_INDEX_X_OFFSET,
  61                         vbox_crtc->fb_offset % pitch / bpp * 8 + vbox_crtc->x);
  62                 vbox_write_ioport(VBE_DISPI_INDEX_Y_OFFSET,
  63                                   vbox_crtc->fb_offset / pitch + vbox_crtc->y);
  64         }
  65 
  66         flags = VBVA_SCREEN_F_ACTIVE;
  67         flags |= (fb && crtc->state->enable) ? 0 : VBVA_SCREEN_F_BLANK;
  68         flags |= vbox_crtc->disconnected ? VBVA_SCREEN_F_DISABLED : 0;
  69         hgsmi_process_display_info(vbox->guest_pool, vbox_crtc->crtc_id,
  70                                    x_offset, y_offset,
  71                                    vbox_crtc->x * bpp / 8 +
  72                                                         vbox_crtc->y * pitch,
  73                                    pitch, width, height, bpp, flags);
  74 }
  75 
  76 static int vbox_set_view(struct drm_crtc *crtc)
  77 {
  78         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  79         struct vbox_private *vbox = crtc->dev->dev_private;
  80         struct vbva_infoview *p;
  81 
  82         /*
  83          * Tell the host about the view.  This design originally targeted the
  84          * Windows XP driver architecture and assumed that each screen would
  85          * have a dedicated frame buffer with the command buffer following it,
  86          * the whole being a "view".  The host works out which screen a command
  87          * buffer belongs to by checking whether it is in the first view, then
  88          * whether it is in the second and so on.  The first match wins.  We
  89          * cheat around this by making the first view be the managed memory
  90          * plus the first command buffer, the second the same plus the second
  91          * buffer and so on.
  92          */
  93         p = hgsmi_buffer_alloc(vbox->guest_pool, sizeof(*p),
  94                                HGSMI_CH_VBVA, VBVA_INFO_VIEW);
  95         if (!p)
  96                 return -ENOMEM;
  97 
  98         p->view_index = vbox_crtc->crtc_id;
  99         p->view_offset = vbox_crtc->fb_offset;
 100         p->view_size = vbox->available_vram_size - vbox_crtc->fb_offset +
 101                        vbox_crtc->crtc_id * VBVA_MIN_BUFFER_SIZE;
 102         p->max_screen_size = vbox->available_vram_size - vbox_crtc->fb_offset;
 103 
 104         hgsmi_buffer_submit(vbox->guest_pool, p);
 105         hgsmi_buffer_free(vbox->guest_pool, p);
 106 
 107         return 0;
 108 }
 109 
 110 /*
 111  * Try to map the layout of virtual screens to the range of the input device.
 112  * Return true if we need to re-set the crtc modes due to screen offset
 113  * changes.
 114  */
 115 static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
 116 {
 117         struct drm_crtc *crtci;
 118         struct drm_connector *connectori;
 119         struct drm_framebuffer *fb, *fb1 = NULL;
 120         bool single_framebuffer = true;
 121         bool old_single_framebuffer = vbox->single_framebuffer;
 122         u16 width = 0, height = 0;
 123 
 124         /*
 125          * Are we using an X.Org-style single large frame-buffer for all crtcs?
 126          * If so then screen layout can be deduced from the crtc offsets.
 127          * Same fall-back if this is the fbdev frame-buffer.
 128          */
 129         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 130                 fb = crtci->primary->state->fb;
 131                 if (!fb)
 132                         continue;
 133 
 134                 if (!fb1) {
 135                         fb1 = fb;
 136                         if (to_vbox_framebuffer(fb1) == &vbox->afb)
 137                                 break;
 138                 } else if (fb != fb1) {
 139                         single_framebuffer = false;
 140                 }
 141         }
 142         if (!fb1)
 143                 return false;
 144 
 145         if (single_framebuffer) {
 146                 vbox->single_framebuffer = true;
 147                 vbox->input_mapping_width = fb1->width;
 148                 vbox->input_mapping_height = fb1->height;
 149                 return old_single_framebuffer != vbox->single_framebuffer;
 150         }
 151         /* Otherwise calculate the total span of all screens. */
 152         list_for_each_entry(connectori, &vbox->ddev.mode_config.connector_list,
 153                             head) {
 154                 struct vbox_connector *vbox_connector =
 155                     to_vbox_connector(connectori);
 156                 struct vbox_crtc *vbox_crtc = vbox_connector->vbox_crtc;
 157 
 158                 width = max_t(u16, width, vbox_crtc->x_hint +
 159                                           vbox_connector->mode_hint.width);
 160                 height = max_t(u16, height, vbox_crtc->y_hint +
 161                                             vbox_connector->mode_hint.height);
 162         }
 163 
 164         vbox->single_framebuffer = false;
 165         vbox->input_mapping_width = width;
 166         vbox->input_mapping_height = height;
 167 
 168         return old_single_framebuffer != vbox->single_framebuffer;
 169 }
 170 
 171 static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
 172                                         struct drm_framebuffer *fb,
 173                                         int x, int y)
 174 {
 175         struct drm_gem_vram_object *gbo =
 176                 drm_gem_vram_of_gem(to_vbox_framebuffer(fb)->obj);
 177         struct vbox_private *vbox = crtc->dev->dev_private;
 178         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
 179         bool needs_modeset = drm_atomic_crtc_needs_modeset(crtc->state);
 180 
 181         mutex_lock(&vbox->hw_mutex);
 182 
 183         if (crtc->state->enable) {
 184                 vbox_crtc->width = crtc->state->mode.hdisplay;
 185                 vbox_crtc->height = crtc->state->mode.vdisplay;
 186         }
 187 
 188         vbox_crtc->x = x;
 189         vbox_crtc->y = y;
 190         vbox_crtc->fb_offset = drm_gem_vram_offset(gbo);
 191 
 192         /* vbox_do_modeset() checks vbox->single_framebuffer so update it now */
 193         if (needs_modeset && vbox_set_up_input_mapping(vbox)) {
 194                 struct drm_crtc *crtci;
 195 
 196                 list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list,
 197                                     head) {
 198                         if (crtci == crtc)
 199                                 continue;
 200                         vbox_do_modeset(crtci);
 201                 }
 202         }
 203 
 204         vbox_set_view(crtc);
 205         vbox_do_modeset(crtc);
 206 
 207         if (needs_modeset)
 208                 hgsmi_update_input_mapping(vbox->guest_pool, 0, 0,
 209                                            vbox->input_mapping_width,
 210                                            vbox->input_mapping_height);
 211 
 212         mutex_unlock(&vbox->hw_mutex);
 213 }
 214 
 215 static void vbox_crtc_atomic_enable(struct drm_crtc *crtc,
 216                                     struct drm_crtc_state *old_crtc_state)
 217 {
 218 }
 219 
 220 static void vbox_crtc_atomic_disable(struct drm_crtc *crtc,
 221                                      struct drm_crtc_state *old_crtc_state)
 222 {
 223 }
 224 
 225 static void vbox_crtc_atomic_flush(struct drm_crtc *crtc,
 226                                    struct drm_crtc_state *old_crtc_state)
 227 {
 228         struct drm_pending_vblank_event *event;
 229         unsigned long flags;
 230 
 231         if (crtc->state && crtc->state->event) {
 232                 event = crtc->state->event;
 233                 crtc->state->event = NULL;
 234 
 235                 spin_lock_irqsave(&crtc->dev->event_lock, flags);
 236                 drm_crtc_send_vblank_event(crtc, event);
 237                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 238         }
 239 }
 240 
 241 static const struct drm_crtc_helper_funcs vbox_crtc_helper_funcs = {
 242         .atomic_enable = vbox_crtc_atomic_enable,
 243         .atomic_disable = vbox_crtc_atomic_disable,
 244         .atomic_flush = vbox_crtc_atomic_flush,
 245 };
 246 
 247 static void vbox_crtc_destroy(struct drm_crtc *crtc)
 248 {
 249         drm_crtc_cleanup(crtc);
 250         kfree(crtc);
 251 }
 252 
 253 static const struct drm_crtc_funcs vbox_crtc_funcs = {
 254         .set_config = drm_atomic_helper_set_config,
 255         .page_flip = drm_atomic_helper_page_flip,
 256         /* .gamma_set = vbox_crtc_gamma_set, */
 257         .destroy = vbox_crtc_destroy,
 258         .reset = drm_atomic_helper_crtc_reset,
 259         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 260         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 261 };
 262 
 263 static int vbox_primary_atomic_check(struct drm_plane *plane,
 264                                      struct drm_plane_state *new_state)
 265 {
 266         struct drm_crtc_state *crtc_state = NULL;
 267 
 268         if (new_state->crtc) {
 269                 crtc_state = drm_atomic_get_existing_crtc_state(
 270                                             new_state->state, new_state->crtc);
 271                 if (WARN_ON(!crtc_state))
 272                         return -EINVAL;
 273         }
 274 
 275         return drm_atomic_helper_check_plane_state(new_state, crtc_state,
 276                                                    DRM_PLANE_HELPER_NO_SCALING,
 277                                                    DRM_PLANE_HELPER_NO_SCALING,
 278                                                    false, true);
 279 }
 280 
 281 static void vbox_primary_atomic_update(struct drm_plane *plane,
 282                                        struct drm_plane_state *old_state)
 283 {
 284         struct drm_crtc *crtc = plane->state->crtc;
 285         struct drm_framebuffer *fb = plane->state->fb;
 286 
 287         vbox_crtc_set_base_and_mode(crtc, fb,
 288                                     plane->state->src_x >> 16,
 289                                     plane->state->src_y >> 16);
 290 }
 291 
 292 static void vbox_primary_atomic_disable(struct drm_plane *plane,
 293                                         struct drm_plane_state *old_state)
 294 {
 295         struct drm_crtc *crtc = old_state->crtc;
 296 
 297         /* vbox_do_modeset checks plane->state->fb and will disable if NULL */
 298         vbox_crtc_set_base_and_mode(crtc, old_state->fb,
 299                                     old_state->src_x >> 16,
 300                                     old_state->src_y >> 16);
 301 }
 302 
 303 static int vbox_primary_prepare_fb(struct drm_plane *plane,
 304                                    struct drm_plane_state *new_state)
 305 {
 306         struct drm_gem_vram_object *gbo;
 307         int ret;
 308 
 309         if (!new_state->fb)
 310                 return 0;
 311 
 312         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(new_state->fb)->obj);
 313         ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
 314         if (ret)
 315                 DRM_WARN("Error %d pinning new fb, out of video mem?\n", ret);
 316 
 317         return ret;
 318 }
 319 
 320 static void vbox_primary_cleanup_fb(struct drm_plane *plane,
 321                                     struct drm_plane_state *old_state)
 322 {
 323         struct drm_gem_vram_object *gbo;
 324 
 325         if (!old_state->fb)
 326                 return;
 327 
 328         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(old_state->fb)->obj);
 329         drm_gem_vram_unpin(gbo);
 330 }
 331 
 332 static int vbox_cursor_atomic_check(struct drm_plane *plane,
 333                                     struct drm_plane_state *new_state)
 334 {
 335         struct drm_crtc_state *crtc_state = NULL;
 336         u32 width = new_state->crtc_w;
 337         u32 height = new_state->crtc_h;
 338         int ret;
 339 
 340         if (new_state->crtc) {
 341                 crtc_state = drm_atomic_get_existing_crtc_state(
 342                                             new_state->state, new_state->crtc);
 343                 if (WARN_ON(!crtc_state))
 344                         return -EINVAL;
 345         }
 346 
 347         ret = drm_atomic_helper_check_plane_state(new_state, crtc_state,
 348                                                   DRM_PLANE_HELPER_NO_SCALING,
 349                                                   DRM_PLANE_HELPER_NO_SCALING,
 350                                                   true, true);
 351         if (ret)
 352                 return ret;
 353 
 354         if (!new_state->fb)
 355                 return 0;
 356 
 357         if (width > VBOX_MAX_CURSOR_WIDTH || height > VBOX_MAX_CURSOR_HEIGHT ||
 358             width == 0 || height == 0)
 359                 return -EINVAL;
 360 
 361         return 0;
 362 }
 363 
 364 /*
 365  * Copy the ARGB image and generate the mask, which is needed in case the host
 366  * does not support ARGB cursors.  The mask is a 1BPP bitmap with the bit set
 367  * if the corresponding alpha value in the ARGB image is greater than 0xF0.
 368  */
 369 static void copy_cursor_image(u8 *src, u8 *dst, u32 width, u32 height,
 370                               size_t mask_size)
 371 {
 372         size_t line_size = (width + 7) / 8;
 373         u32 i, j;
 374 
 375         memcpy(dst + mask_size, src, width * height * 4);
 376         for (i = 0; i < height; ++i)
 377                 for (j = 0; j < width; ++j)
 378                         if (((u32 *)src)[i * width + j] > 0xf0000000)
 379                                 dst[i * line_size + j / 8] |= (0x80 >> (j % 8));
 380 }
 381 
 382 static void vbox_cursor_atomic_update(struct drm_plane *plane,
 383                                       struct drm_plane_state *old_state)
 384 {
 385         struct vbox_private *vbox =
 386                 container_of(plane->dev, struct vbox_private, ddev);
 387         struct vbox_crtc *vbox_crtc = to_vbox_crtc(plane->state->crtc);
 388         struct drm_framebuffer *fb = plane->state->fb;
 389         struct drm_gem_vram_object *gbo =
 390                 drm_gem_vram_of_gem(to_vbox_framebuffer(fb)->obj);
 391         u32 width = plane->state->crtc_w;
 392         u32 height = plane->state->crtc_h;
 393         size_t data_size, mask_size;
 394         u32 flags;
 395         u8 *src;
 396 
 397         /*
 398          * VirtualBox uses the host windowing system to draw the cursor so
 399          * moves are a no-op, we only need to upload new cursor sprites.
 400          */
 401         if (fb == old_state->fb)
 402                 return;
 403 
 404         mutex_lock(&vbox->hw_mutex);
 405 
 406         vbox_crtc->cursor_enabled = true;
 407 
 408         /* pinning is done in prepare/cleanup framebuffer */
 409         src = drm_gem_vram_kmap(gbo, true, NULL);
 410         if (IS_ERR(src)) {
 411                 mutex_unlock(&vbox->hw_mutex);
 412                 DRM_WARN("Could not kmap cursor bo, skipping update\n");
 413                 return;
 414         }
 415 
 416         /*
 417          * The mask must be calculated based on the alpha
 418          * channel, one bit per ARGB word, and must be 32-bit
 419          * padded.
 420          */
 421         mask_size = ((width + 7) / 8 * height + 3) & ~3;
 422         data_size = width * height * 4 + mask_size;
 423 
 424         copy_cursor_image(src, vbox->cursor_data, width, height, mask_size);
 425         drm_gem_vram_kunmap(gbo);
 426 
 427         flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE |
 428                 VBOX_MOUSE_POINTER_ALPHA;
 429         hgsmi_update_pointer_shape(vbox->guest_pool, flags,
 430                                    min_t(u32, max(fb->hot_x, 0), width),
 431                                    min_t(u32, max(fb->hot_y, 0), height),
 432                                    width, height, vbox->cursor_data, data_size);
 433 
 434         mutex_unlock(&vbox->hw_mutex);
 435 }
 436 
 437 static void vbox_cursor_atomic_disable(struct drm_plane *plane,
 438                                        struct drm_plane_state *old_state)
 439 {
 440         struct vbox_private *vbox =
 441                 container_of(plane->dev, struct vbox_private, ddev);
 442         struct vbox_crtc *vbox_crtc = to_vbox_crtc(old_state->crtc);
 443         bool cursor_enabled = false;
 444         struct drm_crtc *crtci;
 445 
 446         mutex_lock(&vbox->hw_mutex);
 447 
 448         vbox_crtc->cursor_enabled = false;
 449 
 450         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 451                 if (to_vbox_crtc(crtci)->cursor_enabled)
 452                         cursor_enabled = true;
 453         }
 454 
 455         if (!cursor_enabled)
 456                 hgsmi_update_pointer_shape(vbox->guest_pool, 0, 0, 0,
 457                                            0, 0, NULL, 0);
 458 
 459         mutex_unlock(&vbox->hw_mutex);
 460 }
 461 
 462 static int vbox_cursor_prepare_fb(struct drm_plane *plane,
 463                                   struct drm_plane_state *new_state)
 464 {
 465         struct drm_gem_vram_object *gbo;
 466 
 467         if (!new_state->fb)
 468                 return 0;
 469 
 470         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(new_state->fb)->obj);
 471         return drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_SYSTEM);
 472 }
 473 
 474 static void vbox_cursor_cleanup_fb(struct drm_plane *plane,
 475                                    struct drm_plane_state *old_state)
 476 {
 477         struct drm_gem_vram_object *gbo;
 478 
 479         if (!plane->state->fb)
 480                 return;
 481 
 482         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(plane->state->fb)->obj);
 483         drm_gem_vram_unpin(gbo);
 484 }
 485 
 486 static const u32 vbox_cursor_plane_formats[] = {
 487         DRM_FORMAT_ARGB8888,
 488 };
 489 
 490 static const struct drm_plane_helper_funcs vbox_cursor_helper_funcs = {
 491         .atomic_check   = vbox_cursor_atomic_check,
 492         .atomic_update  = vbox_cursor_atomic_update,
 493         .atomic_disable = vbox_cursor_atomic_disable,
 494         .prepare_fb     = vbox_cursor_prepare_fb,
 495         .cleanup_fb     = vbox_cursor_cleanup_fb,
 496 };
 497 
 498 static const struct drm_plane_funcs vbox_cursor_plane_funcs = {
 499         .update_plane   = drm_atomic_helper_update_plane,
 500         .disable_plane  = drm_atomic_helper_disable_plane,
 501         .destroy        = drm_primary_helper_destroy,
 502         .reset          = drm_atomic_helper_plane_reset,
 503         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 504         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 505 };
 506 
 507 static const u32 vbox_primary_plane_formats[] = {
 508         DRM_FORMAT_XRGB8888,
 509         DRM_FORMAT_ARGB8888,
 510 };
 511 
 512 static const struct drm_plane_helper_funcs vbox_primary_helper_funcs = {
 513         .atomic_check = vbox_primary_atomic_check,
 514         .atomic_update = vbox_primary_atomic_update,
 515         .atomic_disable = vbox_primary_atomic_disable,
 516         .prepare_fb = vbox_primary_prepare_fb,
 517         .cleanup_fb = vbox_primary_cleanup_fb,
 518 };
 519 
 520 static const struct drm_plane_funcs vbox_primary_plane_funcs = {
 521         .update_plane   = drm_atomic_helper_update_plane,
 522         .disable_plane  = drm_atomic_helper_disable_plane,
 523         .destroy        = drm_primary_helper_destroy,
 524         .reset          = drm_atomic_helper_plane_reset,
 525         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 526         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 527 };
 528 
 529 static struct drm_plane *vbox_create_plane(struct vbox_private *vbox,
 530                                            unsigned int possible_crtcs,
 531                                            enum drm_plane_type type)
 532 {
 533         const struct drm_plane_helper_funcs *helper_funcs = NULL;
 534         const struct drm_plane_funcs *funcs;
 535         struct drm_plane *plane;
 536         const u32 *formats;
 537         int num_formats;
 538         int err;
 539 
 540         if (type == DRM_PLANE_TYPE_PRIMARY) {
 541                 funcs = &vbox_primary_plane_funcs;
 542                 formats = vbox_primary_plane_formats;
 543                 helper_funcs = &vbox_primary_helper_funcs;
 544                 num_formats = ARRAY_SIZE(vbox_primary_plane_formats);
 545         } else if (type == DRM_PLANE_TYPE_CURSOR) {
 546                 funcs = &vbox_cursor_plane_funcs;
 547                 formats = vbox_cursor_plane_formats;
 548                 helper_funcs = &vbox_cursor_helper_funcs;
 549                 num_formats = ARRAY_SIZE(vbox_cursor_plane_formats);
 550         } else {
 551                 return ERR_PTR(-EINVAL);
 552         }
 553 
 554         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 555         if (!plane)
 556                 return ERR_PTR(-ENOMEM);
 557 
 558         err = drm_universal_plane_init(&vbox->ddev, plane, possible_crtcs,
 559                                        funcs, formats, num_formats,
 560                                        NULL, type, NULL);
 561         if (err)
 562                 goto free_plane;
 563 
 564         drm_plane_helper_add(plane, helper_funcs);
 565 
 566         return plane;
 567 
 568 free_plane:
 569         kfree(plane);
 570         return ERR_PTR(-EINVAL);
 571 }
 572 
 573 static struct vbox_crtc *vbox_crtc_init(struct drm_device *dev, unsigned int i)
 574 {
 575         struct vbox_private *vbox =
 576                 container_of(dev, struct vbox_private, ddev);
 577         struct drm_plane *cursor = NULL;
 578         struct vbox_crtc *vbox_crtc;
 579         struct drm_plane *primary;
 580         u32 caps = 0;
 581         int ret;
 582 
 583         ret = hgsmi_query_conf(vbox->guest_pool,
 584                                VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
 585         if (ret)
 586                 return ERR_PTR(ret);
 587 
 588         vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
 589         if (!vbox_crtc)
 590                 return ERR_PTR(-ENOMEM);
 591 
 592         primary = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_PRIMARY);
 593         if (IS_ERR(primary)) {
 594                 ret = PTR_ERR(primary);
 595                 goto free_mem;
 596         }
 597 
 598         if ((caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
 599                 cursor = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_CURSOR);
 600                 if (IS_ERR(cursor)) {
 601                         ret = PTR_ERR(cursor);
 602                         goto clean_primary;
 603                 }
 604         } else {
 605                 DRM_WARN("VirtualBox host is too old, no cursor support\n");
 606         }
 607 
 608         vbox_crtc->crtc_id = i;
 609 
 610         ret = drm_crtc_init_with_planes(dev, &vbox_crtc->base, primary, cursor,
 611                                         &vbox_crtc_funcs, NULL);
 612         if (ret)
 613                 goto clean_cursor;
 614 
 615         drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
 616         drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
 617 
 618         return vbox_crtc;
 619 
 620 clean_cursor:
 621         if (cursor) {
 622                 drm_plane_cleanup(cursor);
 623                 kfree(cursor);
 624         }
 625 clean_primary:
 626         drm_plane_cleanup(primary);
 627         kfree(primary);
 628 free_mem:
 629         kfree(vbox_crtc);
 630         return ERR_PTR(ret);
 631 }
 632 
 633 static void vbox_encoder_destroy(struct drm_encoder *encoder)
 634 {
 635         drm_encoder_cleanup(encoder);
 636         kfree(encoder);
 637 }
 638 
 639 static const struct drm_encoder_funcs vbox_enc_funcs = {
 640         .destroy = vbox_encoder_destroy,
 641 };
 642 
 643 static struct drm_encoder *vbox_encoder_init(struct drm_device *dev,
 644                                              unsigned int i)
 645 {
 646         struct vbox_encoder *vbox_encoder;
 647 
 648         vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
 649         if (!vbox_encoder)
 650                 return NULL;
 651 
 652         drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
 653                          DRM_MODE_ENCODER_DAC, NULL);
 654 
 655         vbox_encoder->base.possible_crtcs = 1 << i;
 656         return &vbox_encoder->base;
 657 }
 658 
 659 /*
 660  * Generate EDID data with a mode-unique serial number for the virtual
 661  * monitor to try to persuade Unity that different modes correspond to
 662  * different monitors and it should not try to force the same resolution on
 663  * them.
 664  */
 665 static void vbox_set_edid(struct drm_connector *connector, int width,
 666                           int height)
 667 {
 668         enum { EDID_SIZE = 128 };
 669         unsigned char edid[EDID_SIZE] = {
 670                 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
 671                 0x58, 0x58,     /* manufacturer (VBX) */
 672                 0x00, 0x00,     /* product code */
 673                 0x00, 0x00, 0x00, 0x00, /* serial number goes here */
 674                 0x01,           /* week of manufacture */
 675                 0x00,           /* year of manufacture */
 676                 0x01, 0x03,     /* EDID version */
 677                 0x80,           /* capabilities - digital */
 678                 0x00,           /* horiz. res in cm, zero for projectors */
 679                 0x00,           /* vert. res in cm */
 680                 0x78,           /* display gamma (120 == 2.2). */
 681                 0xEE,           /* features (standby, suspend, off, RGB, std */
 682                                 /* colour space, preferred timing mode) */
 683                 0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
 684                 /* chromaticity for standard colour space. */
 685                 0x00, 0x00, 0x00,       /* no default timings */
 686                 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 687                     0x01, 0x01,
 688                 0x01, 0x01, 0x01, 0x01, /* no standard timings */
 689                 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
 690                     0x02, 0x02,
 691                 /* descriptor block 1 goes below */
 692                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 693                 /* descriptor block 2, monitor ranges */
 694                 0x00, 0x00, 0x00, 0xFD, 0x00,
 695                 0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
 696                     0x20, 0x20,
 697                 /* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
 698                 0x20,
 699                 /* descriptor block 3, monitor name */
 700                 0x00, 0x00, 0x00, 0xFC, 0x00,
 701                 'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
 702                 '\n',
 703                 /* descriptor block 4: dummy data */
 704                 0x00, 0x00, 0x00, 0x10, 0x00,
 705                 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
 706                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 707                 0x20,
 708                 0x00,           /* number of extensions */
 709                 0x00            /* checksum goes here */
 710         };
 711         int clock = (width + 6) * (height + 6) * 60 / 10000;
 712         unsigned int i, sum = 0;
 713 
 714         edid[12] = width & 0xff;
 715         edid[13] = width >> 8;
 716         edid[14] = height & 0xff;
 717         edid[15] = height >> 8;
 718         edid[54] = clock & 0xff;
 719         edid[55] = clock >> 8;
 720         edid[56] = width & 0xff;
 721         edid[58] = (width >> 4) & 0xf0;
 722         edid[59] = height & 0xff;
 723         edid[61] = (height >> 4) & 0xf0;
 724         for (i = 0; i < EDID_SIZE - 1; ++i)
 725                 sum += edid[i];
 726         edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
 727         drm_connector_update_edid_property(connector, (struct edid *)edid);
 728 }
 729 
 730 static int vbox_get_modes(struct drm_connector *connector)
 731 {
 732         struct vbox_connector *vbox_connector = NULL;
 733         struct drm_display_mode *mode = NULL;
 734         struct vbox_private *vbox = NULL;
 735         unsigned int num_modes = 0;
 736         int preferred_width, preferred_height;
 737 
 738         vbox_connector = to_vbox_connector(connector);
 739         vbox = connector->dev->dev_private;
 740 
 741         hgsmi_report_flags_location(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
 742                                     HOST_FLAGS_OFFSET);
 743         if (vbox_connector->vbox_crtc->crtc_id == 0)
 744                 vbox_report_caps(vbox);
 745 
 746         num_modes = drm_add_modes_noedid(connector, 2560, 1600);
 747         preferred_width = vbox_connector->mode_hint.width ?
 748                           vbox_connector->mode_hint.width : 1024;
 749         preferred_height = vbox_connector->mode_hint.height ?
 750                            vbox_connector->mode_hint.height : 768;
 751         mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
 752                             60, false, false, false);
 753         if (mode) {
 754                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 755                 drm_mode_probed_add(connector, mode);
 756                 ++num_modes;
 757         }
 758         vbox_set_edid(connector, preferred_width, preferred_height);
 759 
 760         if (vbox_connector->vbox_crtc->x_hint != -1)
 761                 drm_object_property_set_value(&connector->base,
 762                         vbox->ddev.mode_config.suggested_x_property,
 763                         vbox_connector->vbox_crtc->x_hint);
 764         else
 765                 drm_object_property_set_value(&connector->base,
 766                         vbox->ddev.mode_config.suggested_x_property, 0);
 767 
 768         if (vbox_connector->vbox_crtc->y_hint != -1)
 769                 drm_object_property_set_value(&connector->base,
 770                         vbox->ddev.mode_config.suggested_y_property,
 771                         vbox_connector->vbox_crtc->y_hint);
 772         else
 773                 drm_object_property_set_value(&connector->base,
 774                         vbox->ddev.mode_config.suggested_y_property, 0);
 775 
 776         return num_modes;
 777 }
 778 
 779 static void vbox_connector_destroy(struct drm_connector *connector)
 780 {
 781         drm_connector_unregister(connector);
 782         drm_connector_cleanup(connector);
 783         kfree(connector);
 784 }
 785 
 786 static enum drm_connector_status
 787 vbox_connector_detect(struct drm_connector *connector, bool force)
 788 {
 789         struct vbox_connector *vbox_connector;
 790 
 791         vbox_connector = to_vbox_connector(connector);
 792 
 793         return vbox_connector->mode_hint.disconnected ?
 794             connector_status_disconnected : connector_status_connected;
 795 }
 796 
 797 static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
 798                            u32 max_y)
 799 {
 800         struct vbox_connector *vbox_connector;
 801         struct drm_device *dev;
 802         struct drm_display_mode *mode, *iterator;
 803 
 804         vbox_connector = to_vbox_connector(connector);
 805         dev = vbox_connector->base.dev;
 806         list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
 807                 list_del(&mode->head);
 808                 drm_mode_destroy(dev, mode);
 809         }
 810 
 811         return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
 812 }
 813 
 814 static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
 815         .get_modes = vbox_get_modes,
 816 };
 817 
 818 static const struct drm_connector_funcs vbox_connector_funcs = {
 819         .detect = vbox_connector_detect,
 820         .fill_modes = vbox_fill_modes,
 821         .destroy = vbox_connector_destroy,
 822         .reset = drm_atomic_helper_connector_reset,
 823         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 824         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 825 };
 826 
 827 static int vbox_connector_init(struct drm_device *dev,
 828                                struct vbox_crtc *vbox_crtc,
 829                                struct drm_encoder *encoder)
 830 {
 831         struct vbox_connector *vbox_connector;
 832         struct drm_connector *connector;
 833 
 834         vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
 835         if (!vbox_connector)
 836                 return -ENOMEM;
 837 
 838         connector = &vbox_connector->base;
 839         vbox_connector->vbox_crtc = vbox_crtc;
 840 
 841         drm_connector_init(dev, connector, &vbox_connector_funcs,
 842                            DRM_MODE_CONNECTOR_VGA);
 843         drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
 844 
 845         connector->interlace_allowed = 0;
 846         connector->doublescan_allowed = 0;
 847 
 848         drm_mode_create_suggested_offset_properties(dev);
 849         drm_object_attach_property(&connector->base,
 850                                    dev->mode_config.suggested_x_property, 0);
 851         drm_object_attach_property(&connector->base,
 852                                    dev->mode_config.suggested_y_property, 0);
 853 
 854         drm_connector_attach_encoder(connector, encoder);
 855 
 856         return 0;
 857 }
 858 
 859 static struct drm_framebuffer *vbox_user_framebuffer_create(
 860                 struct drm_device *dev,
 861                 struct drm_file *filp,
 862                 const struct drm_mode_fb_cmd2 *mode_cmd)
 863 {
 864         struct vbox_private *vbox =
 865                 container_of(dev, struct vbox_private, ddev);
 866         struct drm_gem_object *obj;
 867         struct vbox_framebuffer *vbox_fb;
 868         int ret = -ENOMEM;
 869 
 870         obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
 871         if (!obj)
 872                 return ERR_PTR(-ENOENT);
 873 
 874         vbox_fb = kzalloc(sizeof(*vbox_fb), GFP_KERNEL);
 875         if (!vbox_fb)
 876                 goto err_unref_obj;
 877 
 878         ret = vbox_framebuffer_init(vbox, vbox_fb, mode_cmd, obj);
 879         if (ret)
 880                 goto err_free_vbox_fb;
 881 
 882         return &vbox_fb->base;
 883 
 884 err_free_vbox_fb:
 885         kfree(vbox_fb);
 886 err_unref_obj:
 887         drm_gem_object_put_unlocked(obj);
 888         return ERR_PTR(ret);
 889 }
 890 
 891 static const struct drm_mode_config_funcs vbox_mode_funcs = {
 892         .fb_create = vbox_user_framebuffer_create,
 893         .atomic_check = drm_atomic_helper_check,
 894         .atomic_commit = drm_atomic_helper_commit,
 895 };
 896 
 897 int vbox_mode_init(struct vbox_private *vbox)
 898 {
 899         struct drm_device *dev = &vbox->ddev;
 900         struct drm_encoder *encoder;
 901         struct vbox_crtc *vbox_crtc;
 902         unsigned int i;
 903         int ret;
 904 
 905         drm_mode_config_init(dev);
 906 
 907         dev->mode_config.funcs = (void *)&vbox_mode_funcs;
 908         dev->mode_config.min_width = 0;
 909         dev->mode_config.min_height = 0;
 910         dev->mode_config.preferred_depth = 24;
 911         dev->mode_config.max_width = VBE_DISPI_MAX_XRES;
 912         dev->mode_config.max_height = VBE_DISPI_MAX_YRES;
 913 
 914         for (i = 0; i < vbox->num_crtcs; ++i) {
 915                 vbox_crtc = vbox_crtc_init(dev, i);
 916                 if (IS_ERR(vbox_crtc)) {
 917                         ret = PTR_ERR(vbox_crtc);
 918                         goto err_drm_mode_cleanup;
 919                 }
 920                 encoder = vbox_encoder_init(dev, i);
 921                 if (!encoder) {
 922                         ret = -ENOMEM;
 923                         goto err_drm_mode_cleanup;
 924                 }
 925                 ret = vbox_connector_init(dev, vbox_crtc, encoder);
 926                 if (ret)
 927                         goto err_drm_mode_cleanup;
 928         }
 929 
 930         drm_mode_config_reset(dev);
 931         return 0;
 932 
 933 err_drm_mode_cleanup:
 934         drm_mode_config_cleanup(dev);
 935         return ret;
 936 }
 937 
 938 void vbox_mode_fini(struct vbox_private *vbox)
 939 {
 940         drm_mode_config_cleanup(&vbox->ddev);
 941 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/vboxvideo/vbox_mode.c

DEFINITIONS
