This allows us to export a userland API via sysfs, showing/hiding the
splash on request by dracut, systemd, or other init systems.
Signed-off-by: Max Staudt <msta...@suse.de>
Reviewed-by: Oliver Neukum <oneu...@suse.com>
---
drivers/video/fbdev/core/bootsplash.c | 83 ++++++++++++++++++++++++++
drivers/video/fbdev/core/bootsplash_internal.h | 3 +
2 files changed, 86 insertions(+)
diff --git a/drivers/video/fbdev/core/bootsplash.c
b/drivers/video/fbdev/core/bootsplash.c
index 7a6fd6f8076a..7eb2126c3a31 100644
--- a/drivers/video/fbdev/core/bootsplash.c
+++ b/drivers/video/fbdev/core/bootsplash.c
@@ -198,6 +198,58 @@ void bootsplash_enable(void)
/*
+ * 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", splash_global.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);
+
+
+static struct platform_driver splash_driver = {
+ .driver = {
+ .name = "bootsplash",
+ },
+};
+
+
+
+
+/*
* Main init/exit functions
*/
@@ -208,6 +260,32 @@ void bootsplash_init(void)
return;
+ /* Register platform device to export user API */
+ if (!splash_global.splash_device) {
+ int ret;
+
+ ret = platform_driver_register(&splash_driver);
+ if (ret) {
+ pr_err("platform_driver_register() failed: %d\n", ret);
+ goto err;
+ }
+
+ splash_global.splash_device
+ = platform_device_alloc("bootsplash", 0);
+
+ if (!splash_global.splash_device) {
+ goto err_driver;
+ }
+
+ splash_global.splash_device->dev.groups = splash_dev_groups;
+
+ platform_device_add(splash_global.splash_device);
+ if (ret) {
+ pr_err("platform_device_add() failed: %d\n", ret);
+ goto err_device;
+ }
+ }
+
spin_lock_init(&splash_global.state_lock);
if (!splash_global.wq)
splash_global.wq = alloc_workqueue("bootsplash",
@@ -220,6 +298,11 @@ void bootsplash_init(void)
return;
+err_device:
+ platform_device_put(splash_global.splash_device);
+ splash_global.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
index 4cec02774652..41d519d88baa 100644
--- a/drivers/video/fbdev/core/bootsplash_internal.h
+++ b/drivers/video/fbdev/core/bootsplash_internal.h
@@ -41,6 +41,9 @@ struct splash_priv {
spinlock_t state_lock;
bool enabled;
+ /* Our gateway to userland via sysfs */
+ struct platform_device *splash_device;
+
/* We use our own workqueue so we don't have to worry about blocking
* on console_lock() while animating and thus freezing the system
* during suspend.
--
2.12.3
