Skip to content
Snippets Groups Projects
0001-bootsplash.patch 18 KiB
Newer Older
Philip Müller's avatar
Philip Müller committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746
diff --git a/MAINTAINERS b/MAINTAINERS
index a74227ad082e..b5633b56391e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2705,6 +2705,14 @@ S:	Supported
 F:	drivers/net/bonding/
 F:	include/uapi/linux/if_bonding.h
 
+BOOTSPLASH
+M:	Max Staudt <mstaudt@suse.de>
+L:	linux-fbdev@vger.kernel.org
+S:	Maintained
+F:	drivers/video/fbdev/core/bootsplash*.*
+F:	drivers/video/fbdev/core/dummycon.c
+F:	include/linux/bootsplash.h
+
 BPF (Safe dynamic programs and tools)
 M:	Alexei Starovoitov <ast@kernel.org>
 M:	Daniel Borkmann <daniel@iogearbox.net>
diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig
index 7f1f1fbcef9e..f3ff976266fe 100644
--- a/drivers/video/console/Kconfig
+++ b/drivers/video/console/Kconfig
@@ -151,6 +151,30 @@ config FRAMEBUFFER_CONSOLE_ROTATION
          such that other users of the framebuffer will remain normally
          oriented.
 
+config BOOTSPLASH
+	bool "Bootup splash screen"
+	depends on FRAMEBUFFER_CONSOLE
+	---help---
+	  This option enables the Linux bootsplash screen.
+
+	  The bootsplash is a full-screen logo or animation indicating a
+	  booting system. It replaces the classic scrolling text with a
+	  graphical alternative, similar to other systems.
+
+	  Since this is technically implemented as a hook on top of fbcon,
+	  it can only work if the FRAMEBUFFER_CONSOLE is enabled and a
+	  framebuffer driver is active. Thus, to get a text-free boot,
+	  the system needs to boot with vesafb, efifb, or similar.
+
+	  Once built into the kernel, the bootsplash needs to be enabled
+	  with bootsplash.enabled=1 and a splash file needs to be supplied.
+
+	  Further documentation can be found in:
+	    Documentation/fb/bootsplash.txt
+
+	  If unsure, say N.
+	  This is typically used by distributors and system integrators.
+
 config STI_CONSOLE
         bool "STI text console"
         depends on PARISC
diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile
index 73493bbd7a15..66895321928e 100644
--- a/drivers/video/fbdev/core/Makefile
+++ b/drivers/video/fbdev/core/Makefile
@@ -29,3 +29,6 @@ obj-$(CONFIG_FB_SYS_IMAGEBLIT) += sysimgblt.o
 obj-$(CONFIG_FB_SYS_FOPS)      += fb_sys_fops.o
 obj-$(CONFIG_FB_SVGALIB)       += svgalib.o
 obj-$(CONFIG_FB_DDC)           += fb_ddc.o
+
+obj-$(CONFIG_BOOTSPLASH)       += bootsplash.o bootsplash_render.o \
+                                  dummyblit.o
diff --git a/drivers/video/fbdev/core/bootsplash.c b/drivers/video/fbdev/core/bootsplash.c
new file mode 100644
index 000000000000..e449755af268
--- /dev/null
+++ b/drivers/video/fbdev/core/bootsplash.c
@@ -0,0 +1,294 @@
+/*
+ * Kernel based bootsplash.
+ *
+ * (Main file: Glue code, workers, timer, PM, kernel and userland API)
+ *
+ * Authors:
+ * Max Staudt <mstaudt@suse.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#define pr_fmt(fmt) "bootsplash: " fmt
+
+
+#include <linux/atomic.h>
+#include <linux/bootsplash.h>
+#include <linux/console.h>
+#include <linux/device.h> /* dev_warn() */
+#include <linux/fb.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/selection.h> /* console_blanked */
+#include <linux/stringify.h>
+#include <linux/types.h>
+#include <linux/vmalloc.h>
+#include <linux/vt_kern.h>
+#include <linux/workqueue.h>
+
+#include "bootsplash_internal.h"
+
+
+/*
+ * We only have one splash screen, so let's keep a single
+ * instance of the internal state.
+ */
+static struct splash_priv splash_state;
+
+
+static void splash_callback_redraw_vc(struct work_struct *ignored)
+{
+	if (console_blanked)
+		return;
+
+	console_lock();
+	if (vc_cons[fg_console].d)
+		update_screen(vc_cons[fg_console].d);
+	console_unlock();
+}
+
+
+static bool is_fb_compatible(const struct fb_info *info)
+{
+	if (!(info->flags & FBINFO_BE_MATH)
+	    != !fb_be_math((struct fb_info *)info)) {
+		dev_warn(info->device,
+			 "Can't draw on foreign endianness framebuffer.\n");
+
+		return false;
+	}
+
+	if (info->flags & FBINFO_MISC_TILEBLITTING) {
+		dev_warn(info->device,
+			 "Can't draw splash on tiling framebuffer.\n");
+
+		return false;
+	}
+
+	if (info->fix.type != FB_TYPE_PACKED_PIXELS
+	    || (info->fix.visual != FB_VISUAL_TRUECOLOR
+		&& info->fix.visual != FB_VISUAL_DIRECTCOLOR)) {
+		dev_warn(info->device,
+			 "Can't draw splash on non-packed or non-truecolor framebuffer.\n");
+
+		dev_warn(info->device,
+			 "  type: %u   visual: %u\n",
+			 info->fix.type, info->fix.visual);
+
+		return false;
+	}
+
+	if (info->var.bits_per_pixel != 16
+	    && info->var.bits_per_pixel != 24
+	    && info->var.bits_per_pixel != 32) {
+		dev_warn(info->device,
+			 "We only support drawing on framebuffers with 16, 24, or 32 bpp, not %d.\n",
+			 info->var.bits_per_pixel);
+
+		return false;
+	}
+
+	return true;
+}
+
+
+/*
+ * Called by fbcon_switch() when an instance is activated or refreshed.
+ */
+void bootsplash_render_full(struct fb_info *info)
+{
+	if (!is_fb_compatible(info))
+		return;
+
+	bootsplash_do_render_background(info);
+}
+
+
+/*
+ * External status enquiry and on/off switch
+ */
+bool bootsplash_would_render_now(void)
+{
+	return !oops_in_progress
+		&& !console_blanked
+		&& bootsplash_is_enabled();
+}
+
+bool bootsplash_is_enabled(void)
+{
+	bool was_enabled;
+
+	/* Make sure we have the newest state */
+	smp_rmb();
+
+	was_enabled = test_bit(0, &splash_state.enabled);
+
+	return was_enabled;
+}
+
+void bootsplash_disable(void)
+{
+	int was_enabled;
+
+	was_enabled = test_and_clear_bit(0, &splash_state.enabled);
+
+	if (was_enabled) {
+		if (oops_in_progress) {
+			/* Redraw screen now so we can see a panic */
+			if (vc_cons[fg_console].d)
+				update_screen(vc_cons[fg_console].d);
+		} else {
+			/* No urgency, redraw at next opportunity */
+			schedule_work(&splash_state.work_redraw_vc);
+		}
+	}
+}
+
+void bootsplash_enable(void)
+{
+	bool was_enabled;
+
+	if (oops_in_progress)
+		return;
+
+	was_enabled = test_and_set_bit(0, &splash_state.enabled);
+
+	if (!was_enabled)
+		schedule_work(&splash_state.work_redraw_vc);
+}
+
+
+/*
+ * Userland API via platform device in sysfs
+ */
+static ssize_t splash_show_enabled(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", bootsplash_is_enabled());
+}
+
+static ssize_t splash_store_enabled(struct device *device,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	bool enable;
+	int err;
+
+	if (!buf || !count)
+		return -EFAULT;
+
+	err = kstrtobool(buf, &enable);
+	if (err)
+		return err;
+
+	if (enable)
+		bootsplash_enable();
+	else
+		bootsplash_disable();
+
+	return count;
+}
+
+static DEVICE_ATTR(enabled, 0644, splash_show_enabled, splash_store_enabled);
+
+
+static struct attribute *splash_dev_attrs[] = {
+	&dev_attr_enabled.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(splash_dev);
+
+
+
+
+/*
+ * Power management fixup via platform device
+ *
+ * When the system is woken from sleep or restored after hibernating, we
+ * cannot expect the screen contents to still be present in video RAM.
+ * Thus, we have to redraw the splash if we're currently active.
+ */
+static int splash_resume(struct device *device)
+{
+	if (bootsplash_would_render_now())
+		schedule_work(&splash_state.work_redraw_vc);
+
+	return 0;
+}
+
+static int splash_suspend(struct device *device)
+{
+	cancel_work_sync(&splash_state.work_redraw_vc);
+
+	return 0;
+}
+
+
+static const struct dev_pm_ops splash_pm_ops = {
+	.thaw = splash_resume,
+	.restore = splash_resume,
+	.resume = splash_resume,
+	.suspend = splash_suspend,
+	.freeze = splash_suspend,
+};
+
+static struct platform_driver splash_driver = {
+	.driver = {
+		.name = "bootsplash",
+		.pm = &splash_pm_ops,
+	},
+};
+
+
+/*
+ * Main init
+ */
+void bootsplash_init(void)
+{
+	int ret;
+
+	/* Initialized already? */
+	if (splash_state.splash_device)
+		return;
+
+
+	/* Register platform device to export user API */
+	ret = platform_driver_register(&splash_driver);
+	if (ret) {
+		pr_err("platform_driver_register() failed: %d\n", ret);
+		goto err;
+	}
+
+	splash_state.splash_device
+		= platform_device_alloc("bootsplash", 0);
+
+	if (!splash_state.splash_device)
+		goto err_driver;
+
+	splash_state.splash_device->dev.groups = splash_dev_groups;
+
+	ret = platform_device_add(splash_state.splash_device);
+	if (ret) {
+		pr_err("platform_device_add() failed: %d\n", ret);
+		goto err_device;
+	}
+
+
+	INIT_WORK(&splash_state.work_redraw_vc, splash_callback_redraw_vc);
+
+	return;
+
+err_device:
+	platform_device_put(splash_state.splash_device);
+	splash_state.splash_device = NULL;
+err_driver:
+	platform_driver_unregister(&splash_driver);
+err:
+	pr_err("Failed to initialize.\n");
+}
diff --git a/drivers/video/fbdev/core/bootsplash_internal.h b/drivers/video/fbdev/core/bootsplash_internal.h
new file mode 100644
index 000000000000..b11da5cb90bf
--- /dev/null
+++ b/drivers/video/fbdev/core/bootsplash_internal.h
@@ -0,0 +1,55 @@
+/*
+ * Kernel based bootsplash.
+ *
+ * (Internal data structures used at runtime)
+ *
+ * Authors:
+ * Max Staudt <mstaudt@suse.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef __BOOTSPLASH_INTERNAL_H
+#define __BOOTSPLASH_INTERNAL_H
+
+
+#include <linux/types.h>
+#include <linux/fb.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+
+
+/*
+ * Runtime types
+ */
+struct splash_priv {
+	/*
+	 * Enabled/disabled state, to be used with atomic bit operations.
+	 *   Bit 0: 0 = Splash hidden
+	 *          1 = Splash shown
+	 *
+	 * Note: fbcon.c uses this twice, by calling
+	 *       bootsplash_would_render_now() in set_blitting_type() and
+	 *       in fbcon_switch().
+	 *       This is racy, but eventually consistent: Turning the
+	 *       splash on/off will cause a redraw, which calls
+	 *       fbcon_switch(), which calls set_blitting_type().
+	 *       So the last on/off toggle will make things consistent.
+	 */
+	unsigned long enabled;
+
+	/* Our gateway to userland via sysfs */
+	struct platform_device *splash_device;
+
+	struct work_struct work_redraw_vc;
+};
+
+
+
+/*
+ * Rendering functions
+ */
+void bootsplash_do_render_background(struct fb_info *info);
+
+#endif
diff --git a/drivers/video/fbdev/core/bootsplash_render.c b/drivers/video/fbdev/core/bootsplash_render.c
new file mode 100644
index 000000000000..4d7e0117f653
--- /dev/null
+++ b/drivers/video/fbdev/core/bootsplash_render.c
@@ -0,0 +1,93 @@
+/*
+ * Kernel based bootsplash.
+ *
+ * (Rendering functions)
+ *
+ * Authors:
+ * Max Staudt <mstaudt@suse.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#define pr_fmt(fmt) "bootsplash: " fmt
+
+
+#include <linux/bootsplash.h>
+#include <linux/fb.h>
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/types.h>
+
+#include "bootsplash_internal.h"
+
+
+
+
+/*
+ * Rendering: Internal drawing routines
+ */
+
+
+/*
+ * Pack pixel into target format and do Big/Little Endian handling.
+ * This would be a good place to handle endianness conversion if necessary.
+ */
+static inline u32 pack_pixel(const struct fb_var_screeninfo *dst_var,
+			     u8 red, u8 green, u8 blue)
+{
+	u32 dstpix;
+
+	/* Quantize pixel */
+	red = red >> (8 - dst_var->red.length);
+	green = green >> (8 - dst_var->green.length);
+	blue = blue >> (8 - dst_var->blue.length);
+
+	/* Pack pixel */
+	dstpix = red << (dst_var->red.offset)
+		| green << (dst_var->green.offset)
+		| blue << (dst_var->blue.offset);
+
+	/*
+	 * Move packed pixel to the beginning of the memory cell,
+	 * so we can memcpy() it out easily
+	 */
+#ifdef __BIG_ENDIAN
+	switch (dst_var->bits_per_pixel) {
+	case 16:
+		dstpix <<= 16;
+		break;
+	case 24:
+		dstpix <<= 8;
+		break;
+	case 32:
+		break;
+	}
+#else
+	/* This is intrinsically unnecessary on Little Endian */
+#endif
+
+	return dstpix;
+}
+
+
+void bootsplash_do_render_background(struct fb_info *info)
+{
+	unsigned int x, y;
+	u32 dstpix;
+	u32 dst_octpp = info->var.bits_per_pixel / 8;
+
+	dstpix = pack_pixel(&info->var,
+			    0,
+			    0,
+			    0);
+
+	for (y = 0; y < info->var.yres_virtual; y++) {
+		u8 *dstline = info->screen_buffer + (y * info->fix.line_length);
+
+		for (x = 0; x < info->var.xres_virtual; x++) {
+			memcpy(dstline, &dstpix, dst_octpp);
+
+			dstline += dst_octpp;
+		}
+	}
+}
diff --git a/drivers/video/fbdev/core/dummyblit.c b/drivers/video/fbdev/core/dummyblit.c
new file mode 100644
index 000000000000..8c22ff92ce24
--- /dev/null
+++ b/drivers/video/fbdev/core/dummyblit.c
@@ -0,0 +1,89 @@
+/*
+ *  linux/drivers/video/fbdev/core/dummyblit.c -- Dummy Blitting Operation
+ *
+ *  Authors:
+ *  Max Staudt <mstaudt@suse.de>
+ *
+ *  These functions are used in place of blitblit/tileblit to suppress
+ *  fbcon's text output while a splash is shown.
+ *
+ *  Only suppressing actual rendering keeps the text buffer in the VC layer
+ *  intact and makes it easy to switch back from the bootsplash to a full
+ *  text console with a simple redraw (with the original functions in place).
+ *
+ *  Based on linux/drivers/video/fbdev/core/bitblit.c
+ *       and linux/drivers/video/fbdev/core/tileblit.c
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <linux/module.h>
+#include <linux/fb.h>
+#include <linux/vt_kern.h>
+#include <linux/console.h>
+#include <asm/types.h>
+#include "fbcon.h"
+
+static void dummy_bmove(struct vc_data *vc, struct fb_info *info, int sy,
+			int sx, int dy, int dx, int height, int width)
+{
+	;
+}
+
+static void dummy_clear(struct vc_data *vc, struct fb_info *info, int sy,
+			int sx, int height, int width)
+{
+	;
+}
+
+static void dummy_putcs(struct vc_data *vc, struct fb_info *info,
+			const unsigned short *s, int count, int yy, int xx,
+			int fg, int bg)
+{
+	;
+}
+
+static void dummy_clear_margins(struct vc_data *vc, struct fb_info *info,
+				int color, int bottom_only)
+{
+	;
+}
+
+static void dummy_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+			int softback_lines, int fg, int bg)
+{
+	;
+}
+
+static int dummy_update_start(struct fb_info *info)
+{
+	/*
+	 * Copied from bitblit.c and tileblit.c
+	 *
+	 * As of Linux 4.12, nobody seems to care about our return value.
+	 */
+	struct fbcon_ops *ops = info->fbcon_par;
+	int err;
+
+	err = fb_pan_display(info, &ops->var);
+	ops->var.xoffset = info->var.xoffset;
+	ops->var.yoffset = info->var.yoffset;
+	ops->var.vmode = info->var.vmode;
+	return err;
+}
+
+void fbcon_set_dummyops(struct fbcon_ops *ops)
+{
+	ops->bmove = dummy_bmove;
+	ops->clear = dummy_clear;
+	ops->putcs = dummy_putcs;
+	ops->clear_margins = dummy_clear_margins;
+	ops->cursor = dummy_cursor;
+	ops->update_start = dummy_update_start;
+	ops->rotate_font = NULL;
+}
+EXPORT_SYMBOL_GPL(fbcon_set_dummyops);
+
+MODULE_AUTHOR("Max Staudt <mstaudt@suse.de>");
+MODULE_DESCRIPTION("Dummy Blitting Operation");
+MODULE_LICENSE("GPL");
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 04612f938bab..9a39a6fcfe98 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -80,6 +80,7 @@
 #include <asm/irq.h>
 
 #include "fbcon.h"
+#include <linux/bootsplash.h>
 
 #ifdef FBCONDEBUG
 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
@@ -542,6 +543,8 @@ static int do_fbcon_takeover(int show_logo)
 	for (i = first_fb_vc; i <= last_fb_vc; i++)
 		con2fb_map[i] = info_idx;
 
+	bootsplash_init();
+
 	err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 				fbcon_is_default);
 
@@ -661,6 +664,9 @@ static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 	else {
 		fbcon_set_rotation(info);
 		fbcon_set_bitops(ops);
+
+		if (bootsplash_would_render_now())
+			fbcon_set_dummyops(ops);
 	}
 }
 
@@ -683,6 +689,19 @@ static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 	ops->p = &fb_display[vc->vc_num];
 	fbcon_set_rotation(info);
 	fbcon_set_bitops(ops);
+
+	/*
+	 * Note:
+	 * This is *eventually correct*.
+	 * Setting the fbcon operations and drawing the splash happen at
+	 * different points in time. If the splash is enabled/disabled
+	 * in between, then bootsplash_{en,dis}able will schedule a
+	 * redraw, which will again render the splash (or not) and set
+	 * the correct fbcon ops.
+	 * The last run will then be the right one.
+	 */
+	if (bootsplash_would_render_now())
+		fbcon_set_dummyops(ops);
 }
 
 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
@@ -2184,6 +2203,9 @@ static int fbcon_switch(struct vc_data *vc)
 	info = registered_fb[con2fb_map[vc->vc_num]];
 	ops = info->fbcon_par;
 
+	if (bootsplash_would_render_now())
+		bootsplash_render_full(info);
+
 	if (softback_top) {
 		if (softback_lines)
 			fbcon_set_origin(vc);
diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h
index 18f3ac144237..45f94347fe5e 100644
--- a/drivers/video/fbdev/core/fbcon.h
+++ b/drivers/video/fbdev/core/fbcon.h
@@ -214,6 +214,11 @@ static inline int attr_col_ec(int shift, struct vc_data *vc,
 #define SCROLL_REDRAW	   0x004
 #define SCROLL_PAN_REDRAW  0x005
 
+#ifdef CONFIG_BOOTSPLASH
+extern void fbcon_set_dummyops(struct fbcon_ops *ops);
+#else /* CONFIG_BOOTSPLASH */
+#define fbcon_set_dummyops(x)
+#endif /* CONFIG_BOOTSPLASH */
 #ifdef CONFIG_FB_TILEBLITTING
 extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
 #endif
diff --git a/include/linux/bootsplash.h b/include/linux/bootsplash.h
new file mode 100644
index 000000000000..c6dd0b43180d
--- /dev/null
+++ b/include/linux/bootsplash.h
@@ -0,0 +1,43 @@
+/*
+ * Kernel based bootsplash.
+ *
+ * Authors:
+ * Max Staudt <mstaudt@suse.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef __LINUX_BOOTSPLASH_H
+#define __LINUX_BOOTSPLASH_H
+
+#include <linux/fb.h>
+
+
+#ifdef CONFIG_BOOTSPLASH
+
+extern void bootsplash_render_full(struct fb_info *info);
+
+extern bool bootsplash_would_render_now(void);
+
+extern bool bootsplash_is_enabled(void);
+extern void bootsplash_disable(void);
+extern void bootsplash_enable(void);
+
+extern void bootsplash_init(void);
+
+#else /* CONFIG_BOOTSPLASH */
+
+#define bootsplash_render_full(x)
+
+#define bootsplash_would_render_now() (false)
+
+#define bootsplash_is_enabled() (false)
+#define bootsplash_disable()
+#define bootsplash_enable()
+
+#define bootsplash_init()
+
+#endif /* CONFIG_BOOTSPLASH */
+
+
+#endif