6081905edf
The fblog drivers provides a replacement for fbcon and prints all kernel log messages to all available framebuffer devices. As long as the driver is not upstream, I will keep it here for reference. See linux-serial@vger.kernel.org for discussion. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
52 lines
1.5 KiB
Diff
52 lines
1.5 KiB
Diff
From 942d4ff8f16fcf9d9fdf50d7241a3a8fb4fec39a Mon Sep 17 00:00:00 2001
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From: David Herrmann <dh.herrmann@googlemail.com>
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Date: Sat, 16 Jun 2012 23:20:52 +0200
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Subject: [PATCH 07/10] fblog: forward kernel log messages to all framebuffers
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This provides a console-driver that forwards all log messages to all
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framebuffers and redraws them.
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To avoid redrawing multiple times in short intervals, we could use a
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work-queue here by simply pushing the task onto the system work-queue.
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However, fblog is not performance critical and only used for debugging so
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we avoid the complexity for now. This may change in the future, though.
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Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
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---
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drivers/video/console/fblog.c | 19 +++++++++++++++++++
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1 file changed, 19 insertions(+)
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diff --git a/drivers/video/console/fblog.c b/drivers/video/console/fblog.c
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index 9b05c56..5297eca 100644
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--- a/drivers/video/console/fblog.c
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+++ b/drivers/video/console/fblog.c
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@@ -449,6 +449,25 @@ static void fblog_deactivate(void)
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fblog_unregister_all();
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}
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+static void fblog_con_write(struct console *con, const char *buf,
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+ unsigned int len)
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+{
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+ int i;
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+
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+ for (i = 0; i < FB_MAX; ++i) {
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+ if (fblog_fbs[i]) {
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+ fblog_buf_write(&fblog_fbs[i]->buf, buf, len);
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+ fblog_redraw(fblog_fbs[i]);
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+ }
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+ }
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+}
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+
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+static struct console fblog_con_driver = {
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+ .name = "fblog",
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+ .write = fblog_con_write,
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+ .flags = CON_PRINTBUFFER | CON_ENABLED,
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+};
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+
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static ssize_t fblog_dev_active_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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--
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1.7.10.4
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