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-rw-r--r--0501-bootsplash.patch746
1 files changed, 746 insertions, 0 deletions
diff --git a/0501-bootsplash.patch b/0501-bootsplash.patch
new file mode 100644
index 00000000000..924f23f33ce
--- /dev/null
+++ b/0501-bootsplash.patch
@@ -0,0 +1,746 @@
+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