video/console: Implement ANSI clear line command
There is a standard ANSI terminal escape sequence to clear a whole line
of text. So far the DM_VIDEO console was missing this code.
Detect the sequence and use vidconsole_set_row with the background
colour to fix this omission.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/video/vidconsole-uclass.c b/drivers/video/vidconsole-uclass.c
index 6cf9124..cf2f0df 100644
--- a/drivers/video/vidconsole-uclass.c
+++ b/drivers/video/vidconsole-uclass.c
@@ -346,6 +346,25 @@
}
break;
}
+ case 'K': {
+ struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+ int mode;
+
+ /*
+ * Clear (parts of) current line
+ * [0K - clear line to end
+ * [2K - clear entire line
+ */
+ parsenum(priv->escape_buf + 1, &mode);
+
+ if (mode == 2) {
+ int row, col;
+
+ get_cursor_position(priv, &row, &col);
+ vidconsole_set_row(dev, row, vid_priv->colour_bg);
+ }
+ break;
+ }
case 'm': {
struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
char *s = priv->escape_buf;