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From 942d4ff8f16fcf9d9fdf50d7241a3a8fb4fec39a Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@googlemail.com>
Date: Sat, 16 Jun 2012 23:20:52 +0200
Subject: [PATCH 07/10] fblog: forward kernel log messages to all framebuffers
This provides a console-driver that forwards all log messages to all
framebuffers and redraws them.
To avoid redrawing multiple times in short intervals, we could use a
work-queue here by simply pushing the task onto the system work-queue.
However, fblog is not performance critical and only used for debugging so
we avoid the complexity for now. This may change in the future, though.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
---
drivers/video/console/fblog.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/video/console/fblog.c b/drivers/video/console/fblog.c
index 9b05c56..5297eca 100644
--- a/drivers/video/console/fblog.c
+++ b/drivers/video/console/fblog.c
@@ -449,6 +449,25 @@ static void fblog_deactivate(void)
fblog_unregister_all();
}
+static void fblog_con_write(struct console *con, const char *buf,
+ unsigned int len)
+{
+ int i;
+
+ for (i = 0; i < FB_MAX; ++i) {
+ if (fblog_fbs[i]) {
+ fblog_buf_write(&fblog_fbs[i]->buf, buf, len);
+ fblog_redraw(fblog_fbs[i]);
+ }
+ }
+}
+
+static struct console fblog_con_driver = {
+ .name = "fblog",
+ .write = fblog_con_write,
+ .flags = CON_PRINTBUFFER | CON_ENABLED,
+};
+
static ssize_t fblog_dev_active_show(struct device *dev,
struct device_attribute *attr,
char *buf)
--
1.7.10.4
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