summaryrefslogtreecommitdiff
path: root/drivers/video/fbdev/core
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/fbdev/core')
-rw-r--r--drivers/video/fbdev/core/fb_backlight.c12
-rw-r--r--drivers/video/fbdev/core/fb_info.c1
-rw-r--r--drivers/video/fbdev/core/fbcon.c7
-rw-r--r--drivers/video/fbdev/core/fbcvt.c2
-rw-r--r--drivers/video/fbdev/core/fbmem.c104
-rw-r--r--drivers/video/fbdev/core/fbsysfs.c8
6 files changed, 106 insertions, 28 deletions
diff --git a/drivers/video/fbdev/core/fb_backlight.c b/drivers/video/fbdev/core/fb_backlight.c
index 6fdaa9f81be9..dbed9696f4c5 100644
--- a/drivers/video/fbdev/core/fb_backlight.c
+++ b/drivers/video/fbdev/core/fb_backlight.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-or-later
+#include <linux/backlight.h>
#include <linux/export.h>
#include <linux/fb.h>
#include <linux/mutex.h>
@@ -36,4 +37,15 @@ struct backlight_device *fb_bl_device(struct fb_info *info)
return info->bl_dev;
}
EXPORT_SYMBOL(fb_bl_device);
+
+void fb_bl_notify_blank(struct fb_info *info, int old_blank)
+{
+ bool on = info->blank == FB_BLANK_UNBLANK;
+ bool prev_on = old_blank == FB_BLANK_UNBLANK;
+
+ if (info->bl_dev)
+ backlight_notify_blank(info->bl_dev, info->device, on, prev_on);
+ else
+ backlight_notify_blank_all(info->device, on, prev_on);
+}
#endif
diff --git a/drivers/video/fbdev/core/fb_info.c b/drivers/video/fbdev/core/fb_info.c
index 4847ebe50d7d..52f9bd2c5417 100644
--- a/drivers/video/fbdev/core/fb_info.c
+++ b/drivers/video/fbdev/core/fb_info.c
@@ -42,6 +42,7 @@ struct fb_info *framebuffer_alloc(size_t size, struct device *dev)
info->device = dev;
info->fbcon_rotate_hint = -1;
+ info->blank = FB_BLANK_UNBLANK;
#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
mutex_init(&info->bl_curve_mutex);
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index ac3c99ed92d1..2df48037688d 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -117,9 +117,14 @@ static signed char con2fb_map_boot[MAX_NR_CONSOLES];
static struct fb_info *fbcon_info_from_console(int console)
{
+ signed char fb;
WARN_CONSOLE_UNLOCKED();
- return fbcon_registered_fb[con2fb_map[console]];
+ fb = con2fb_map[console];
+ if (fb < 0 || fb >= ARRAY_SIZE(fbcon_registered_fb))
+ return NULL;
+
+ return fbcon_registered_fb[fb];
}
static int logo_lines;
diff --git a/drivers/video/fbdev/core/fbcvt.c b/drivers/video/fbdev/core/fbcvt.c
index 64843464c661..cd3821bd82e5 100644
--- a/drivers/video/fbdev/core/fbcvt.c
+++ b/drivers/video/fbdev/core/fbcvt.c
@@ -312,7 +312,7 @@ int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb)
cvt.f_refresh = cvt.refresh;
cvt.interlace = 1;
- if (!cvt.xres || !cvt.yres || !cvt.refresh) {
+ if (!cvt.xres || !cvt.yres || !cvt.refresh || cvt.f_refresh > INT_MAX) {
printk(KERN_INFO "fbcvt: Invalid input parameters\n");
return 1;
}
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 3c568cff2913..dfcf5e4d1d4c 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -15,6 +15,8 @@
#include <linux/export.h>
#include <linux/fb.h>
#include <linux/fbcon.h>
+#include <linux/lcd.h>
+#include <linux/leds.h>
#include <video/nomodeset.h>
@@ -220,6 +222,12 @@ static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
return err;
}
+static void fb_lcd_notify_mode_change(struct fb_info *info,
+ struct fb_videomode *mode)
+{
+ lcd_notify_mode_change_all(info->device, mode->xres, mode->yres);
+}
+
int
fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
{
@@ -227,7 +235,6 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
u32 activate;
struct fb_var_screeninfo old_var;
struct fb_videomode mode;
- struct fb_event event;
u32 unused;
if (var->activate & FB_ACTIVATE_INV_MODE) {
@@ -328,35 +335,76 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
!list_empty(&info->modelist))
ret = fb_add_videomode(&mode, &info->modelist);
- if (ret)
+ if (ret) {
+ info->var = old_var;
return ret;
+ }
- event.info = info;
- event.data = &mode;
- fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
+ fb_lcd_notify_mode_change(info, &mode);
return 0;
}
EXPORT_SYMBOL(fb_set_var);
-int
-fb_blank(struct fb_info *info, int blank)
+static void fb_lcd_notify_blank(struct fb_info *info)
{
- struct fb_event event;
- int ret = -EINVAL;
+ int power;
+
+ switch (info->blank) {
+ case FB_BLANK_UNBLANK:
+ power = LCD_POWER_ON;
+ break;
+ /* deprecated; TODO: should become 'off' */
+ case FB_BLANK_NORMAL:
+ power = LCD_POWER_REDUCED;
+ break;
+ case FB_BLANK_VSYNC_SUSPEND:
+ power = LCD_POWER_REDUCED_VSYNC_SUSPEND;
+ break;
+ /* 'off' */
+ case FB_BLANK_HSYNC_SUSPEND:
+ case FB_BLANK_POWERDOWN:
+ default:
+ power = LCD_POWER_OFF;
+ break;
+ }
+
+ lcd_notify_blank_all(info->device, power);
+}
+
+static void fb_ledtrig_backlight_notify_blank(struct fb_info *info)
+{
+ if (info->blank == FB_BLANK_UNBLANK)
+ ledtrig_backlight_blank(false);
+ else
+ ledtrig_backlight_blank(true);
+}
+
+int fb_blank(struct fb_info *info, int blank)
+{
+ int old_blank = info->blank;
+ int ret;
+
+ if (!info->fbops->fb_blank)
+ return -EINVAL;
if (blank > FB_BLANK_POWERDOWN)
blank = FB_BLANK_POWERDOWN;
- event.info = info;
- event.data = &blank;
+ info->blank = blank;
- if (info->fbops->fb_blank)
- ret = info->fbops->fb_blank(blank, info);
+ ret = info->fbops->fb_blank(blank, info);
+ if (ret)
+ goto err;
- if (!ret)
- fb_notifier_call_chain(FB_EVENT_BLANK, &event);
+ fb_bl_notify_blank(info, old_blank);
+ fb_lcd_notify_blank(info);
+ fb_ledtrig_backlight_notify_blank(info);
+ return 0;
+
+err:
+ info->blank = old_blank;
return ret;
}
EXPORT_SYMBOL(fb_blank);
@@ -388,7 +436,7 @@ static int fb_check_foreignness(struct fb_info *fi)
static int do_register_framebuffer(struct fb_info *fb_info)
{
- int i;
+ int i, err = 0;
struct fb_videomode mode;
if (fb_check_foreignness(fb_info))
@@ -397,15 +445,31 @@ static int do_register_framebuffer(struct fb_info *fb_info)
if (num_registered_fb == FB_MAX)
return -ENXIO;
- num_registered_fb++;
for (i = 0 ; i < FB_MAX; i++)
if (!registered_fb[i])
break;
+
+ if (!fb_info->modelist.prev || !fb_info->modelist.next)
+ INIT_LIST_HEAD(&fb_info->modelist);
+
+ fb_var_to_videomode(&mode, &fb_info->var);
+ err = fb_add_videomode(&mode, &fb_info->modelist);
+ if (err < 0)
+ return err;
+
fb_info->node = i;
refcount_set(&fb_info->count, 1);
mutex_init(&fb_info->lock);
mutex_init(&fb_info->mm_lock);
+ /*
+ * With an fb_blank callback present, we assume that the
+ * display is blank, so that fb_blank() enables it on the
+ * first modeset.
+ */
+ if (fb_info->fbops->fb_blank)
+ fb_info->blank = FB_BLANK_POWERDOWN;
+
fb_device_create(fb_info);
if (fb_info->pixmap.addr == NULL) {
@@ -426,16 +490,12 @@ static int do_register_framebuffer(struct fb_info *fb_info)
if (bitmap_empty(fb_info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT))
bitmap_fill(fb_info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
- if (!fb_info->modelist.prev || !fb_info->modelist.next)
- INIT_LIST_HEAD(&fb_info->modelist);
-
if (fb_info->skip_vt_switch)
pm_vt_switch_required(fb_info->device, false);
else
pm_vt_switch_required(fb_info->device, true);
- fb_var_to_videomode(&mode, &fb_info->var);
- fb_add_videomode(&mode, &fb_info->modelist);
+ num_registered_fb++;
registered_fb[i] = fb_info;
#ifdef CONFIG_GUMSTIX_AM200EPD
diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 06d75c767579..b8344c40073b 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -242,11 +242,11 @@ static ssize_t store_blank(struct device *device,
return count;
}
-static ssize_t show_blank(struct device *device,
- struct device_attribute *attr, char *buf)
+static ssize_t show_blank(struct device *device, struct device_attribute *attr, char *buf)
{
-// struct fb_info *fb_info = dev_get_drvdata(device);
- return 0;
+ struct fb_info *fb_info = dev_get_drvdata(device);
+
+ return sysfs_emit(buf, "%d\n", fb_info->blank);
}
static ssize_t store_console(struct device *device,
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-23 09:32:28 +0000