drivers/gpu/drm/udl/udl_modeset.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2012 Red Hat
   4  *
   5  * based in parts on udlfb.c:
   6  * Copyright (C) 2009 Roberto De Ioris <[email protected]>
   7  * Copyright (C) 2009 Jaya Kumar <[email protected]>
   8  * Copyright (C) 2009 Bernie Thompson <[email protected]>
   9  */
  10
  11 #include <linux/bitfield.h>
  12
  13 #include <drm/drm_atomic.h>
  14 #include <drm/drm_atomic_helper.h>
  15 #include <drm/drm_damage_helper.h>
  16 #include <drm/drm_drv.h>
  17 #include <drm/drm_edid.h>
  18 #include <drm/drm_fourcc.h>
  19 #include <drm/drm_gem_atomic_helper.h>
  20 #include <drm/drm_gem_framebuffer_helper.h>
  21 #include <drm/drm_gem_shmem_helper.h>
  22 #include <drm/drm_modeset_helper_vtables.h>
  23 #include <drm/drm_plane_helper.h>
  24 #include <drm/drm_probe_helper.h>
  25 #include <drm/drm_vblank.h>
  26
  27 #include "udl_drv.h"
  28 #include "udl_proto.h"
  29
  30 /*
  31  * All DisplayLink bulk operations start with 0xaf (UDL_MSG_BULK), followed by
  32  * a specific command code. All operations are written to a command buffer, which
  33  * the driver sends to the device.
  34  */
  35 static char *udl_set_register(char *buf, u8 reg, u8 val)
  36 {
  37         *buf++ = UDL_MSG_BULK;
  38         *buf++ = UDL_CMD_WRITEREG;
  39         *buf++ = reg;
  40         *buf++ = val;
  41
  42         return buf;
  43 }
  44
  45 static char *udl_vidreg_lock(char *buf)
  46 {
  47         return udl_set_register(buf, UDL_REG_VIDREG, UDL_VIDREG_LOCK);
  48 }
  49
  50 static char *udl_vidreg_unlock(char *buf)
  51 {
  52         return udl_set_register(buf, UDL_REG_VIDREG, UDL_VIDREG_UNLOCK);
  53 }
  54
  55 static char *udl_set_blank_mode(char *buf, u8 mode)
  56 {
  57         return udl_set_register(buf, UDL_REG_BLANKMODE, mode);
  58 }
  59
  60 static char *udl_set_color_depth(char *buf, u8 selection)
  61 {
  62         return udl_set_register(buf, UDL_REG_COLORDEPTH, selection);
  63 }
  64
  65 static char *udl_set_base16bpp(char *buf, u32 base)
  66 {
  67         /* the base pointer is 24 bits wide, 0x20 is hi byte. */
  68         u8 reg20 = FIELD_GET(UDL_BASE_ADDR2_MASK, base);
  69         u8 reg21 = FIELD_GET(UDL_BASE_ADDR1_MASK, base);
  70         u8 reg22 = FIELD_GET(UDL_BASE_ADDR0_MASK, base);
  71
  72         buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR2, reg20);
  73         buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR1, reg21);
  74         buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR0, reg22);
  75
  76         return buf;
  77 }
  78
  79 /*
  80  * DisplayLink HW has separate 16bpp and 8bpp framebuffers.
  81  * In 24bpp modes, the low 323 RGB bits go in the 8bpp framebuffer
  82  */
  83 static char *udl_set_base8bpp(char *buf, u32 base)
  84 {
  85         /* the base pointer is 24 bits wide, 0x26 is hi byte. */
  86         u8 reg26 = FIELD_GET(UDL_BASE_ADDR2_MASK, base);
  87         u8 reg27 = FIELD_GET(UDL_BASE_ADDR1_MASK, base);
  88         u8 reg28 = FIELD_GET(UDL_BASE_ADDR0_MASK, base);
  89
  90         buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR2, reg26);
  91         buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR1, reg27);
  92         buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR0, reg28);
  93
  94         return buf;
  95 }
  96
  97 static char *udl_set_register_16(char *wrptr, u8 reg, u16 value)
  98 {
  99         wrptr = udl_set_register(wrptr, reg, value >> 8);
 100         return udl_set_register(wrptr, reg+1, value);
 101 }
 102
 103 /*
 104  * This is kind of weird because the controller takes some
 105  * register values in a different byte order than other registers.
 106  */
 107 static char *udl_set_register_16be(char *wrptr, u8 reg, u16 value)
 108 {
 109         wrptr = udl_set_register(wrptr, reg, value);
 110         return udl_set_register(wrptr, reg+1, value >> 8);
 111 }
 112
 113 /*
 114  * LFSR is linear feedback shift register. The reason we have this is
 115  * because the display controller needs to minimize the clock depth of
 116  * various counters used in the display path. So this code reverses the
 117  * provided value into the lfsr16 value by counting backwards to get
 118  * the value that needs to be set in the hardware comparator to get the
 119  * same actual count. This makes sense once you read above a couple of
 120  * times and think about it from a hardware perspective.
 121  */
 122 static u16 udl_lfsr16(u16 actual_count)
 123 {
 124         u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */
 125
 126         while (actual_count--) {
 127                 lv =     ((lv << 1) |
 128                         (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1))
 129                         & 0xFFFF;
 130         }
 131
 132         return (u16) lv;
 133 }
 134
 135 /*
 136  * This does LFSR conversion on the value that is to be written.
 137  * See LFSR explanation above for more detail.
 138  */
 139 static char *udl_set_register_lfsr16(char *wrptr, u8 reg, u16 value)
 140 {
 141         return udl_set_register_16(wrptr, reg, udl_lfsr16(value));
 142 }
 143
 144 /*
 145  * Takes a DRM display mode and converts it into the DisplayLink
 146  * equivalent register commands.
 147  */
 148 static char *udl_set_display_mode(char *buf, struct drm_display_mode *mode)
 149 {
 150         u16 reg01 = mode->crtc_htotal - mode->crtc_hsync_start;
 151         u16 reg03 = reg01 + mode->crtc_hdisplay;
 152         u16 reg05 = mode->crtc_vtotal - mode->crtc_vsync_start;
 153         u16 reg07 = reg05 + mode->crtc_vdisplay;
 154         u16 reg09 = mode->crtc_htotal - 1;
 155         u16 reg0b = 1; /* libdlo hardcodes hsync start to 1 */
 156         u16 reg0d = mode->crtc_hsync_end - mode->crtc_hsync_start + 1;
 157         u16 reg0f = mode->hdisplay;
 158         u16 reg11 = mode->crtc_vtotal;
 159         u16 reg13 = 0; /* libdlo hardcodes vsync start to 0 */
 160         u16 reg15 = mode->crtc_vsync_end - mode->crtc_vsync_start;
 161         u16 reg17 = mode->crtc_vdisplay;
 162         u16 reg1b = mode->clock / 5;
 163
 164         buf = udl_set_register_lfsr16(buf, UDL_REG_XDISPLAYSTART, reg01);
 165         buf = udl_set_register_lfsr16(buf, UDL_REG_XDISPLAYEND, reg03);
 166         buf = udl_set_register_lfsr16(buf, UDL_REG_YDISPLAYSTART, reg05);
 167         buf = udl_set_register_lfsr16(buf, UDL_REG_YDISPLAYEND, reg07);
 168         buf = udl_set_register_lfsr16(buf, UDL_REG_XENDCOUNT, reg09);
 169         buf = udl_set_register_lfsr16(buf, UDL_REG_HSYNCSTART, reg0b);
 170         buf = udl_set_register_lfsr16(buf, UDL_REG_HSYNCEND, reg0d);
 171         buf = udl_set_register_16(buf, UDL_REG_HPIXELS, reg0f);
 172         buf = udl_set_register_lfsr16(buf, UDL_REG_YENDCOUNT, reg11);
 173         buf = udl_set_register_lfsr16(buf, UDL_REG_VSYNCSTART, reg13);
 174         buf = udl_set_register_lfsr16(buf, UDL_REG_VSYNCEND, reg15);
 175         buf = udl_set_register_16(buf, UDL_REG_VPIXELS, reg17);
 176         buf = udl_set_register_16be(buf, UDL_REG_PIXELCLOCK5KHZ, reg1b);
 177
 178         return buf;
 179 }
 180
 181 static char *udl_dummy_render(char *wrptr)
 182 {
 183         *wrptr++ = UDL_MSG_BULK;
 184         *wrptr++ = UDL_CMD_WRITECOPY16;
 185         *wrptr++ = 0x00; /* from addr */
 186         *wrptr++ = 0x00;
 187         *wrptr++ = 0x00;
 188         *wrptr++ = 0x01; /* one pixel */
 189         *wrptr++ = 0x00; /* to address */
 190         *wrptr++ = 0x00;
 191         *wrptr++ = 0x00;
 192         return wrptr;
 193 }
 194
 195 static long udl_log_cpp(unsigned int cpp)
 196 {
 197         if (WARN_ON(!is_power_of_2(cpp)))
 198                 return -EINVAL;
 199         return __ffs(cpp);
 200 }
 201
 202 static int udl_handle_damage(struct drm_framebuffer *fb,
 203                              const struct iosys_map *map,
 204                              const struct drm_rect *clip)
 205 {
 206         struct drm_device *dev = fb->dev;
 207         void *vaddr = map->vaddr; /* TODO: Use mapping abstraction properly */
 208         int i, ret;
 209         char *cmd;
 210         struct urb *urb;
 211         int log_bpp;
 212
 213         ret = udl_log_cpp(fb->format->cpp[0]);
 214         if (ret < 0)
 215                 return ret;
 216         log_bpp = ret;
 217
 218         urb = udl_get_urb(dev);
 219         if (!urb)
 220                 return -ENOMEM;
 221         cmd = urb->transfer_buffer;
 222
 223         for (i = clip->y1; i < clip->y2; i++) {
 224                 const int line_offset = fb->pitches[0] * i;
 225                 const int byte_offset = line_offset + (clip->x1 << log_bpp);
 226                 const int dev_byte_offset = (fb->width * i + clip->x1) << log_bpp;
 227                 const int byte_width = drm_rect_width(clip) << log_bpp;
 228                 ret = udl_render_hline(dev, log_bpp, &urb, (char *)vaddr,
 229                                        &cmd, byte_offset, dev_byte_offset,
 230                                        byte_width);
 231                 if (ret)
 232                         return ret;
 233         }
 234
 235         if (cmd > (char *)urb->transfer_buffer) {
 236                 /* Send partial buffer remaining before exiting */
 237                 int len;
 238                 if (cmd < (char *)urb->transfer_buffer + urb->transfer_buffer_length)
 239                         *cmd++ = UDL_MSG_BULK;
 240                 len = cmd - (char *)urb->transfer_buffer;
 241                 ret = udl_submit_urb(dev, urb, len);
 242         } else {
 243                 udl_urb_completion(urb);
 244         }
 245
 246         return 0;
 247 }
 248
 249 /*
 250  * Primary plane
 251  */
 252
 253 static const uint32_t udl_primary_plane_formats[] = {
 254         DRM_FORMAT_RGB565,
 255         DRM_FORMAT_XRGB8888,
 256 };
 257
 258 static const uint64_t udl_primary_plane_fmtmods[] = {
 259         DRM_FORMAT_MOD_LINEAR,
 260         DRM_FORMAT_MOD_INVALID
 261 };
 262
 263 static void udl_primary_plane_helper_atomic_update(struct drm_plane *plane,
 264                                                    struct drm_atomic_state *state)
 265 {
 266         struct drm_device *dev = plane->dev;
 267         struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
 268         struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
 269         struct drm_framebuffer *fb = plane_state->fb;
 270         struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
 271         struct drm_atomic_helper_damage_iter iter;
 272         struct drm_rect damage;
 273         int ret, idx;
 274
 275         if (!fb)
 276                 return; /* no framebuffer; plane is disabled */
 277
 278         ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
 279         if (ret)
 280                 return;
 281
 282         if (!drm_dev_enter(dev, &idx))
 283                 goto out_drm_gem_fb_end_cpu_access;
 284
 285         drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
 286         drm_atomic_for_each_plane_damage(&iter, &damage) {
 287                 udl_handle_damage(fb, &shadow_plane_state->data[0], &damage);
 288         }
 289
 290         drm_dev_exit(idx);
 291
 292 out_drm_gem_fb_end_cpu_access:
 293         drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
 294 }
 295
 296 static const struct drm_plane_helper_funcs udl_primary_plane_helper_funcs = {
 297         DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
 298         .atomic_check = drm_plane_helper_atomic_check,
 299         .atomic_update = udl_primary_plane_helper_atomic_update,
 300 };
 301
 302 static const struct drm_plane_funcs udl_primary_plane_funcs = {
 303         .update_plane = drm_atomic_helper_update_plane,
 304         .disable_plane = drm_atomic_helper_disable_plane,
 305         .destroy = drm_plane_cleanup,
 306         DRM_GEM_SHADOW_PLANE_FUNCS,
 307 };
 308
 309 /*
 310  * CRTC
 311  */
 312
 313 static int udl_crtc_helper_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state)
 314 {
 315         struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 316
 317         if (!new_crtc_state->enable)
 318                 return 0;
 319
 320         return drm_atomic_helper_check_crtc_primary_plane(new_crtc_state);
 321 }
 322
 323 static void udl_crtc_helper_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state)
 324 {
 325         struct drm_device *dev = crtc->dev;
 326         struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 327         struct drm_display_mode *mode = &crtc_state->mode;
 328         struct urb *urb;
 329         char *buf;
 330         int idx;
 331
 332         if (!drm_dev_enter(dev, &idx))
 333                 return;
 334
 335         urb = udl_get_urb(dev);
 336         if (!urb)
 337                 goto out;
 338
 339         buf = (char *)urb->transfer_buffer;
 340         buf = udl_vidreg_lock(buf);
 341         buf = udl_set_color_depth(buf, UDL_COLORDEPTH_16BPP);
 342         /* set base for 16bpp segment to 0 */
 343         buf = udl_set_base16bpp(buf, 0);
 344         /* set base for 8bpp segment to end of fb */
 345         buf = udl_set_base8bpp(buf, 2 * mode->vdisplay * mode->hdisplay);
 346         buf = udl_set_display_mode(buf, mode);
 347         buf = udl_set_blank_mode(buf, UDL_BLANKMODE_ON);
 348         buf = udl_vidreg_unlock(buf);
 349         buf = udl_dummy_render(buf);
 350
 351         udl_submit_urb(dev, urb, buf - (char *)urb->transfer_buffer);
 352
 353 out:
 354         drm_dev_exit(idx);
 355 }
 356
 357 static void udl_crtc_helper_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *state)
 358 {
 359         struct drm_device *dev = crtc->dev;
 360         struct urb *urb;
 361         char *buf;
 362         int idx;
 363
 364         if (!drm_dev_enter(dev, &idx))
 365                 return;
 366
 367         urb = udl_get_urb(dev);
 368         if (!urb)
 369                 goto out;
 370
 371         buf = (char *)urb->transfer_buffer;
 372         buf = udl_vidreg_lock(buf);
 373         buf = udl_set_blank_mode(buf, UDL_BLANKMODE_POWERDOWN);
 374         buf = udl_vidreg_unlock(buf);
 375         buf = udl_dummy_render(buf);
 376
 377         udl_submit_urb(dev, urb, buf - (char *)urb->transfer_buffer);
 378
 379 out:
 380         drm_dev_exit(idx);
 381 }
 382
 383 static const struct drm_crtc_helper_funcs udl_crtc_helper_funcs = {
 384         .atomic_check = udl_crtc_helper_atomic_check,
 385         .atomic_enable = udl_crtc_helper_atomic_enable,
 386         .atomic_disable = udl_crtc_helper_atomic_disable,
 387 };
 388
 389 static const struct drm_crtc_funcs udl_crtc_funcs = {
 390         .reset = drm_atomic_helper_crtc_reset,
 391         .destroy = drm_crtc_cleanup,
 392         .set_config = drm_atomic_helper_set_config,
 393         .page_flip = drm_atomic_helper_page_flip,
 394         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 395         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 396 };
 397
 398 /*
 399  * Encoder
 400  */
 401
 402 static const struct drm_encoder_funcs udl_encoder_funcs = {
 403         .destroy = drm_encoder_cleanup,
 404 };
 405
 406 /*
 407  * Connector
 408  */
 409
 410 static int udl_connector_helper_get_modes(struct drm_connector *connector)
 411 {
 412         struct udl_connector *udl_connector = to_udl_connector(connector);
 413
 414         drm_connector_update_edid_property(connector, udl_connector->edid);
 415         if (udl_connector->edid)
 416                 return drm_add_edid_modes(connector, udl_connector->edid);
 417
 418         return 0;
 419 }
 420
 421 static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
 422         .get_modes = udl_connector_helper_get_modes,
 423 };
 424
 425 static int udl_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
 426 {
 427         struct udl_device *udl = data;
 428         struct drm_device *dev = &udl->drm;
 429         struct usb_device *udev = udl_to_usb_device(udl);
 430         u8 *read_buff;
 431         int ret;
 432         size_t i;
 433
 434         read_buff = kmalloc(2, GFP_KERNEL);
 435         if (!read_buff)
 436                 return -ENOMEM;
 437
 438         for (i = 0; i < len; i++) {
 439                 int bval = (i + block * EDID_LENGTH) << 8;
 440
 441                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 442                                       0x02, (0x80 | (0x02 << 5)), bval,
 443                                       0xA1, read_buff, 2, USB_CTRL_GET_TIMEOUT);
 444                 if (ret < 0) {
 445                         drm_err(dev, "Read EDID byte %zu failed err %x\n", i, ret);
 446                         goto err_kfree;
 447                 } else if (ret < 1) {
 448                         ret = -EIO;
 449                         drm_err(dev, "Read EDID byte %zu failed\n", i);
 450                         goto err_kfree;
 451                 }
 452
 453                 buf[i] = read_buff[1];
 454         }
 455
 456         kfree(read_buff);
 457
 458         return 0;
 459
 460 err_kfree:
 461         kfree(read_buff);
 462         return ret;
 463 }
 464
 465 static enum drm_connector_status udl_connector_detect(struct drm_connector *connector, bool force)
 466 {
 467         struct drm_device *dev = connector->dev;
 468         struct udl_device *udl = to_udl(dev);
 469         struct udl_connector *udl_connector = to_udl_connector(connector);
 470         enum drm_connector_status status = connector_status_disconnected;
 471         int idx;
 472
 473         /* cleanup previous EDID */
 474         kfree(udl_connector->edid);
 475         udl_connector->edid = NULL;
 476
 477         if (!drm_dev_enter(dev, &idx))
 478                 return connector_status_disconnected;
 479
 480         udl_connector->edid = drm_do_get_edid(connector, udl_get_edid_block, udl);
 481         if (udl_connector->edid)
 482                 status = connector_status_connected;
 483
 484         drm_dev_exit(idx);
 485
 486         return status;
 487 }
 488
 489 static void udl_connector_destroy(struct drm_connector *connector)
 490 {
 491         struct udl_connector *udl_connector = to_udl_connector(connector);
 492
 493         drm_connector_cleanup(connector);
 494         kfree(udl_connector->edid);
 495         kfree(udl_connector);
 496 }
 497
 498 static const struct drm_connector_funcs udl_connector_funcs = {
 499         .reset = drm_atomic_helper_connector_reset,
 500         .detect = udl_connector_detect,
 501         .fill_modes = drm_helper_probe_single_connector_modes,
 502         .destroy = udl_connector_destroy,
 503         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 504         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 505 };
 506
 507 struct drm_connector *udl_connector_init(struct drm_device *dev)
 508 {
 509         struct udl_connector *udl_connector;
 510         struct drm_connector *connector;
 511         int ret;
 512
 513         udl_connector = kzalloc(sizeof(*udl_connector), GFP_KERNEL);
 514         if (!udl_connector)
 515                 return ERR_PTR(-ENOMEM);
 516
 517         connector = &udl_connector->connector;
 518         ret = drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_VGA);
 519         if (ret)
 520                 goto err_kfree;
 521
 522         drm_connector_helper_add(connector, &udl_connector_helper_funcs);
 523
 524         connector->polled = DRM_CONNECTOR_POLL_HPD |
 525                             DRM_CONNECTOR_POLL_CONNECT |
 526                             DRM_CONNECTOR_POLL_DISCONNECT;
 527
 528         return connector;
 529
 530 err_kfree:
 531         kfree(udl_connector);
 532         return ERR_PTR(ret);
 533 }
 534
 535 /*
 536  * Modesetting
 537  */
 538
 539 static enum drm_mode_status udl_mode_config_mode_valid(struct drm_device *dev,
 540                                                        const struct drm_display_mode *mode)
 541 {
 542         struct udl_device *udl = to_udl(dev);
 543
 544         if (udl->sku_pixel_limit) {
 545                 if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
 546                         return MODE_MEM;
 547         }
 548
 549         return MODE_OK;
 550 }
 551
 552 static const struct drm_mode_config_funcs udl_mode_config_funcs = {
 553         .fb_create = drm_gem_fb_create_with_dirty,
 554         .mode_valid = udl_mode_config_mode_valid,
 555         .atomic_check  = drm_atomic_helper_check,
 556         .atomic_commit = drm_atomic_helper_commit,
 557 };
 558
 559 int udl_modeset_init(struct drm_device *dev)
 560 {
 561         struct udl_device *udl = to_udl(dev);
 562         struct drm_plane *primary_plane;
 563         struct drm_crtc *crtc;
 564         struct drm_encoder *encoder;
 565         struct drm_connector *connector;
 566         int ret;
 567
 568         ret = drmm_mode_config_init(dev);
 569         if (ret)
 570                 return ret;
 571
 572         dev->mode_config.min_width = 640;
 573         dev->mode_config.min_height = 480;
 574         dev->mode_config.max_width = 2048;
 575         dev->mode_config.max_height = 2048;
 576         dev->mode_config.preferred_depth = 16;
 577         dev->mode_config.funcs = &udl_mode_config_funcs;
 578
 579         primary_plane = &udl->primary_plane;
 580         ret = drm_universal_plane_init(dev, primary_plane, 0,
 581                                        &udl_primary_plane_funcs,
 582                                        udl_primary_plane_formats,
 583                                        ARRAY_SIZE(udl_primary_plane_formats),
 584                                        udl_primary_plane_fmtmods,
 585                                        DRM_PLANE_TYPE_PRIMARY, NULL);
 586         if (ret)
 587                 return ret;
 588         drm_plane_helper_add(primary_plane, &udl_primary_plane_helper_funcs);
 589         drm_plane_enable_fb_damage_clips(primary_plane);
 590
 591         crtc = &udl->crtc;
 592         ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
 593                                         &udl_crtc_funcs, NULL);
 594         if (ret)
 595                 return ret;
 596         drm_crtc_helper_add(crtc, &udl_crtc_helper_funcs);
 597
 598         encoder = &udl->encoder;
 599         ret = drm_encoder_init(dev, encoder, &udl_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL);
 600         if (ret)
 601                 return ret;
 602         encoder->possible_crtcs = drm_crtc_mask(crtc);
 603
 604         connector = udl_connector_init(dev);
 605         if (IS_ERR(connector))
 606                 return PTR_ERR(connector);
 607         ret = drm_connector_attach_encoder(connector, encoder);
 608         if (ret)
 609                 return ret;
 610
 611         drm_mode_config_reset(dev);
 612
 613         return 0;
 614 }