fblog/0007-fblog-forward-kernel-log-messages-to-all-framebuffer.patch

   1 From 942d4ff8f16fcf9d9fdf50d7241a3a8fb4fec39a Mon Sep 17 00:00:00 2001
   2 From: David Herrmann <dh.herrmann@googlemail.com>
   3 Date: Sat, 16 Jun 2012 23:20:52 +0200
   4 Subject: [PATCH 07/10] fblog: forward kernel log messages to all framebuffers
   5
   6 This provides a console-driver that forwards all log messages to all
   7 framebuffers and redraws them.
   8
   9 To avoid redrawing multiple times in short intervals, we could use a
  10 work-queue here by simply pushing the task onto the system work-queue.
  11 However, fblog is not performance critical and only used for debugging so
  12 we avoid the complexity for now. This may change in the future, though.
  13
  14 Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
  15 ---
  16  drivers/video/console/fblog.c |   19 +++++++++++++++++++
  17  1 file changed, 19 insertions(+)
  18
  19 diff --git a/drivers/video/console/fblog.c b/drivers/video/console/fblog.c
  20 index 9b05c56..5297eca 100644
  21 --- a/drivers/video/console/fblog.c
  22 +++ b/drivers/video/console/fblog.c
  23 @@ -449,6 +449,25 @@ static void fblog_deactivate(void)
  24         fblog_unregister_all();
  25  }
  26
  27 +static void fblog_con_write(struct console *con, const char *buf,
  28 +                           unsigned int len)
  29 +{
  30 +       int i;
  31 +
  32 +       for (i = 0; i < FB_MAX; ++i) {
  33 +               if (fblog_fbs[i]) {
  34 +                       fblog_buf_write(&fblog_fbs[i]->buf, buf, len);
  35 +                       fblog_redraw(fblog_fbs[i]);
  36 +               }
  37 +       }
  38 +}
  39 +
  40 +static struct console fblog_con_driver = {
  41 +       .name = "fblog",
  42 +       .write = fblog_con_write,
  43 +       .flags = CON_PRINTBUFFER | CON_ENABLED,
  44 +};
  45 +
  46  static ssize_t fblog_dev_active_show(struct device *dev,
  47                                      struct device_attribute *attr,
  48                                      char *buf)
  49 --
  50 1.7.10.4
  51