[PATCH 07/10] fblog: forward kernel log messages to all framebuffers
From: David Herrmann <hidden>
Date: 2012-06-16 22:06:09
Also in:
linux-serial, lkml
Subsystem:
console subsystem, framebuffer layer, the rest · Maintainers:
Greg Kroah-Hartman, Helge Deller, Linus Torvalds
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 <redacted> --- 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)
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1.7.10.4