[PATCH v2 16/56] vidconsole: Avoid kerning against an unrelated character

[Simon Glass]

When the cursor position changes, kerning should not be used for the
next character, since it can make the first displayed character shuffle
left or right a bit.

Clear the kern character when setting the position.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

(no changes since v1)

 drivers/video/console_truetype.c  | 2 ++
 drivers/video/vidconsole-uclass.c | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/drivers/video/console_truetype.c b/drivers/video/console_truetype.c
index 2e3e6f07112..6d2c2c2e177 100644
--- a/drivers/video/console_truetype.c
+++ b/drivers/video/console_truetype.c
@@ -490,10 +490,12 @@ static int console_truetype_backspace(struct udevice *dev)
 
 static int console_truetype_entry_start(struct udevice *dev)
 {
+	struct vidconsole_priv *vc_priv = dev_get_uclass_priv(dev);
 	struct console_tt_priv *priv = dev_get_priv(dev);
 
 	/* A new input line has start, so clear our history */
 	priv->pos_ptr = 0;
+	vc_priv->last_ch = 0;
 
 	return 0;
 }
diff --git a/drivers/video/vidconsole-uclass.c b/drivers/video/vidconsole-uclass.c
index 6ba62ec348e..f1b2d61bd8f 100644
--- a/drivers/video/vidconsole-uclass.c
+++ b/drivers/video/vidconsole-uclass.c
@@ -127,6 +127,9 @@ void vidconsole_set_cursor_pos(struct udevice *dev, int x, int y)
 	priv->xcur_frac = VID_TO_POS(x);
 	priv->xstart_frac = priv->xcur_frac;
 	priv->ycur = y;
+
+	/* make sure not to kern against the previous character */
+	priv->last_ch = 0;
 	vidconsole_entry_start(dev);
 }
 
-- 
2.43.0