From 942d4ff8f16fcf9d9fdf50d7241a3a8fb4fec39a Mon Sep 17 00:00:00 2001 From: David Herrmann 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 --- 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