6 files changed, 175 insertions, 137 deletions

diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile
index 08fabce76b74..8f0060160ffb 100644
--- a/drivers/video/fbdev/core/Makefile
+++ b/drivers/video/fbdev/core/Makefile
@@ -2,7 +2,7 @@
 obj-$(CONFIG_FB_NOTIFY)           += fb_notify.o
 obj-$(CONFIG_FB)                  += fb.o
 fb-y                              := fbmem.o fbmon.o fbcmap.o fbsysfs.o \
-                                     modedb.o fbcvt.o fb_cmdline.o
+                                     modedb.o fbcvt.o fb_cmdline.o fb_io_fops.o
 fb-$(CONFIG_FB_DEFERRED_IO)       += fb_defio.o
 
 ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE),y)
diff --git a/drivers/video/fbdev/core/fb_io_fops.c b/drivers/video/fbdev/core/fb_io_fops.c
new file mode 100644
index 000000000000..5985e5e1b040
--- /dev/null
+++ b/drivers/video/fbdev/core/fb_io_fops.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/fb.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+
+ssize_t fb_io_read(struct fb_info *info, char __user *buf, size_t count, loff_t *ppos)
+{
+	unsigned long p = *ppos;
+	u8 *buffer, *dst;
+	u8 __iomem *src;
+	int c, cnt = 0, err = 0;
+	unsigned long total_size, trailing;
+
+	if (!info->screen_base)
+		return -ENODEV;
+
+	total_size = info->screen_size;
+
+	if (total_size == 0)
+		total_size = info->fix.smem_len;
+
+	if (p >= total_size)
+		return 0;
+
+	if (count >= total_size)
+		count = total_size;
+
+	if (count + p > total_size)
+		count = total_size - p;
+
+	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
+			 GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	src = (u8 __iomem *) (info->screen_base + p);
+
+	if (info->fbops->fb_sync)
+		info->fbops->fb_sync(info);
+
+	while (count) {
+		c  = (count > PAGE_SIZE) ? PAGE_SIZE : count;
+		dst = buffer;
+		fb_memcpy_fromio(dst, src, c);
+		dst += c;
+		src += c;
+
+		trailing = copy_to_user(buf, buffer, c);
+		if (trailing == c) {
+			err = -EFAULT;
+			break;
+		}
+		c -= trailing;
+
+		*ppos += c;
+		buf += c;
+		cnt += c;
+		count -= c;
+	}
+
+	kfree(buffer);
+
+	return cnt ? cnt : err;
+}
+EXPORT_SYMBOL(fb_io_read);
+
+ssize_t fb_io_write(struct fb_info *info, const char __user *buf, size_t count, loff_t *ppos)
+{
+	unsigned long p = *ppos;
+	u8 *buffer, *src;
+	u8 __iomem *dst;
+	int c, cnt = 0, err = 0;
+	unsigned long total_size, trailing;
+
+	if (!info->screen_base)
+		return -ENODEV;
+
+	total_size = info->screen_size;
+
+	if (total_size == 0)
+		total_size = info->fix.smem_len;
+
+	if (p > total_size)
+		return -EFBIG;
+
+	if (count > total_size) {
+		err = -EFBIG;
+		count = total_size;
+	}
+
+	if (count + p > total_size) {
+		if (!err)
+			err = -ENOSPC;
+
+		count = total_size - p;
+	}
+
+	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
+			 GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	dst = (u8 __iomem *) (info->screen_base + p);
+
+	if (info->fbops->fb_sync)
+		info->fbops->fb_sync(info);
+
+	while (count) {
+		c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
+		src = buffer;
+
+		trailing = copy_from_user(src, buf, c);
+		if (trailing == c) {
+			err = -EFAULT;
+			break;
+		}
+		c -= trailing;
+
+		fb_memcpy_toio(dst, src, c);
+		dst += c;
+		src += c;
+		*ppos += c;
+		buf += c;
+		cnt += c;
+		count -= c;
+	}
+
+	kfree(buffer);
+
+	return (cnt) ? cnt : err;
+}
+EXPORT_SYMBOL(fb_io_write);
diff --git a/drivers/video/fbdev/core/fb_sys_fops.c b/drivers/video/fbdev/core/fb_sys_fops.c
index ff275d7f3eaf..0cb0989abda6 100644
--- a/drivers/video/fbdev/core/fb_sys_fops.c
+++ b/drivers/video/fbdev/core/fb_sys_fops.c
@@ -19,10 +19,11 @@ ssize_t fb_sys_read(struct fb_info *info, char __user *buf, size_t count,
 	unsigned long p = *ppos;
 	void *src;
 	int err = 0;
-	unsigned long total_size;
+	unsigned long total_size, c;
+	ssize_t ret;
 
-	if (info->state != FBINFO_STATE_RUNNING)
-		return -EPERM;
+	if (!info->screen_buffer)
+		return -ENODEV;
 
 	total_size = info->screen_size;
 
@@ -38,18 +39,19 @@ ssize_t fb_sys_read(struct fb_info *info, char __user *buf, size_t count,
 	if (count + p > total_size)
 		count = total_size - p;
 
-	src = (void __force *)(info->screen_base + p);
+	src = info->screen_buffer + p;
 
 	if (info->fbops->fb_sync)
 		info->fbops->fb_sync(info);
 
-	if (copy_to_user(buf, src, count))
+	c = copy_to_user(buf, src, count);
+	if (c)
 		err = -EFAULT;
+	ret = count - c;
 
-	if  (!err)
-		*ppos += count;
+	*ppos += ret;
 
-	return (err) ? err : count;
+	return ret ? ret : err;
 }
 EXPORT_SYMBOL_GPL(fb_sys_read);
 
@@ -59,10 +61,11 @@ ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 	unsigned long p = *ppos;
 	void *dst;
 	int err = 0;
-	unsigned long total_size;
+	unsigned long total_size, c;
+	size_t ret;
 
-	if (info->state != FBINFO_STATE_RUNNING)
-		return -EPERM;
+	if (!info->screen_buffer)
+		return -ENODEV;
 
 	total_size = info->screen_size;
 
@@ -84,18 +87,19 @@ ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 		count = total_size - p;
 	}
 
-	dst = (void __force *) (info->screen_base + p);
+	dst = info->screen_buffer + p;
 
 	if (info->fbops->fb_sync)
 		info->fbops->fb_sync(info);
 
-	if (copy_from_user(dst, buf, count))
+	c = copy_from_user(dst, buf, count);
+	if (c)
 		err = -EFAULT;
+	ret = count - c;
 
-	if  (!err)
-		*ppos += count;
+	*ppos += ret;
 
-	return (err) ? err : count;
+	return ret ? ret : err;
 }
 EXPORT_SYMBOL_GPL(fb_sys_write);
 
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 0a2c47df01f4..c6c9d040bdec 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -75,7 +75,6 @@
 #include <linux/interrupt.h>
 #include <linux/crc32.h> /* For counting font checksums */
 #include <linux/uaccess.h>
-#include <asm/fb.h>
 #include <asm/irq.h>
 
 #include "fbcon.h"
@@ -823,7 +822,7 @@ static int set_con2fb_map(int unit, int newidx, int user)
 	int oldidx = con2fb_map[unit];
 	struct fb_info *info = fbcon_registered_fb[newidx];
 	struct fb_info *oldinfo = NULL;
-	int found, err = 0, show_logo;
+	int err = 0, show_logo;
 
 	WARN_CONSOLE_UNLOCKED();
 
@@ -841,26 +840,26 @@ static int set_con2fb_map(int unit, int newidx, int user)
 	if (oldidx != -1)
 		oldinfo = fbcon_registered_fb[oldidx];
 
-	found = search_fb_in_map(newidx);
-
-	if (!err && !found) {
+	if (!search_fb_in_map(newidx)) {
 		err = con2fb_acquire_newinfo(vc, info, unit);
-		if (!err)
-			con2fb_map[unit] = newidx;
+		if (err)
+			return err;
+
+		fbcon_add_cursor_work(info);
 	}
 
+	con2fb_map[unit] = newidx;
+
 	/*
 	 * If old fb is not mapped to any of the consoles,
 	 * fbcon should release it.
 	 */
-	if (!err && oldinfo && !search_fb_in_map(oldidx))
+	if (oldinfo && !search_fb_in_map(oldidx))
 		con2fb_release_oldinfo(vc, oldinfo, info);
 
 	show_logo = (fg_console == 0 && !user &&
 			 logo_shown != FBCON_LOGO_DONTSHOW);
 
-	if (!found)
-		fbcon_add_cursor_work(info);
 	con2fb_map_boot[unit] = newidx;
 	con2fb_init_display(vc, info, unit, show_logo);
 
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 875541ff185b..d5f897b5ba54 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -37,8 +37,6 @@
 #include <linux/mem_encrypt.h>
 #include <linux/pci.h>
 
-#include <asm/fb.h>
-
 #include <video/nomodeset.h>
 #include <video/vga.h>
 
@@ -761,14 +759,9 @@ static struct fb_info *file_fb_info(struct file *file)
 static ssize_t
 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 {
-	unsigned long p = *ppos;
 	struct fb_info *info = file_fb_info(file);
-	u8 *buffer, *dst;
-	u8 __iomem *src;
-	int c, cnt = 0, err = 0;
-	unsigned long total_size;
 
-	if (!info || ! info->screen_base)
+	if (!info)
 		return -ENODEV;
 
 	if (info->state != FBINFO_STATE_RUNNING)
@@ -777,63 +770,15 @@ fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 	if (info->fbops->fb_read)
 		return info->fbops->fb_read(info, buf, count, ppos);
 
-	total_size = info->screen_size;
-
-	if (total_size == 0)
-		total_size = info->fix.smem_len;
-
-	if (p >= total_size)
-		return 0;
-
-	if (count >= total_size)
-		count = total_size;
-
-	if (count + p > total_size)
-		count = total_size - p;
-
-	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
-			 GFP_KERNEL);
-	if (!buffer)
-		return -ENOMEM;
-
-	src = (u8 __iomem *) (info->screen_base + p);
-
-	if (info->fbops->fb_sync)
-		info->fbops->fb_sync(info);
-
-	while (count) {
-		c  = (count > PAGE_SIZE) ? PAGE_SIZE : count;
-		dst = buffer;
-		fb_memcpy_fromfb(dst, src, c);
-		dst += c;
-		src += c;
-
-		if (copy_to_user(buf, buffer, c)) {
-			err = -EFAULT;
-			break;
-		}
-		*ppos += c;
-		buf += c;
-		cnt += c;
-		count -= c;
-	}
-
-	kfree(buffer);
-
-	return (err) ? err : cnt;
+	return fb_io_read(info, buf, count, ppos);
 }
 
 static ssize_t
 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 {
-	unsigned long p = *ppos;
 	struct fb_info *info = file_fb_info(file);
-	u8 *buffer, *src;
-	u8 __iomem *dst;
-	int c, cnt = 0, err = 0;
-	unsigned long total_size;
 
-	if (!info || !info->screen_base)
+	if (!info)
 		return -ENODEV;
 
 	if (info->state != FBINFO_STATE_RUNNING)
@@ -842,57 +787,7 @@ fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 	if (info->fbops->fb_write)
 		return info->fbops->fb_write(info, buf, count, ppos);
 
-	total_size = info->screen_size;
-
-	if (total_size == 0)
-		total_size = info->fix.smem_len;
-
-	if (p > total_size)
-		return -EFBIG;
-
-	if (count > total_size) {
-		err = -EFBIG;
-		count = total_size;
-	}
-
-	if (count + p > total_size) {
-		if (!err)
-			err = -ENOSPC;
-
-		count = total_size - p;
-	}
-
-	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
-			 GFP_KERNEL);
-	if (!buffer)
-		return -ENOMEM;
-
-	dst = (u8 __iomem *) (info->screen_base + p);
-
-	if (info->fbops->fb_sync)
-		info->fbops->fb_sync(info);
-
-	while (count) {
-		c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
-		src = buffer;
-
-		if (copy_from_user(src, buf, c)) {
-			err = -EFAULT;
-			break;
-		}
-
-		fb_memcpy_tofb(dst, src, c);
-		dst += c;
-		src += c;
-		*ppos += c;
-		buf += c;
-		cnt += c;
-		count -= c;
-	}
-
-	kfree(buffer);
-
-	return (cnt) ? cnt : err;
+	return fb_io_write(info, buf, count, ppos);
 }
 
 int
@@ -1116,6 +1011,8 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	case FBIOPUT_VSCREENINFO:
 		if (copy_from_user(&var, argp, sizeof(var)))
 			return -EFAULT;
+		/* only for kernel-internal use */
+		var.activate &= ~FB_ACTIVATE_KD_TEXT;
 		console_lock();
 		lock_fb_info(info);
 		ret = fbcon_modechange_possible(info, &var);
@@ -1749,7 +1646,7 @@ fbmem_init(void)
 		goto err_chrdev;
 	}
 
-	fb_class = class_create(THIS_MODULE, "graphics");
+	fb_class = class_create("graphics");
 	if (IS_ERR(fb_class)) {
 		ret = PTR_ERR(fb_class);
 		pr_warn("Unable to create fb class; errno = %d\n", ret);
diff --git a/drivers/video/fbdev/core/modedb.c b/drivers/video/fbdev/core/modedb.c
index 23cf8eba785d..f7e019dded0f 100644
--- a/drivers/video/fbdev/core/modedb.c
+++ b/drivers/video/fbdev/core/modedb.c
@@ -257,6 +257,11 @@ static const struct fb_videomode modedb[] = {
 	{ NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3, 0,
 		FB_VMODE_DOUBLE },
 
+	/* 1920x1080 @ 60 Hz, 67.3 kHz hsync */
+	{ NULL, 60, 1920, 1080, 6734, 148, 88, 36, 4, 44, 5, 0,
+		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+		FB_VMODE_NONINTERLACED },
+
 	/* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
 	{ NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,