video: Adjust rotated console to start at right edge
At present when the console is rotated 180 degrees it starts almost a
whole character to the left of the right edge (typically 7 pixels with
an 8-pixel-wide font). On a display which aligns with the font width,
this just wastes space. On a display that does not this can result in
x_frac going negative for the final character (the one on the left
side) and the overflow -EAGAIN check at the start of the function
failing.
Change the function to start at the rightmost pixel to fix these
problems.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/video/console_rotate.c b/drivers/video/console_rotate.c
index 8bb05ae..da0ce7b 100644
--- a/drivers/video/console_rotate.c
+++ b/drivers/video/console_rotate.c
@@ -212,7 +212,7 @@
if (x_frac + VID_TO_POS(vc_priv->x_charsize) > vc_priv->xsize_frac)
return -EAGAIN;
linenum = vid_priv->ysize - y - 1;
- x = vid_priv->xsize - VID_TO_PIXEL(x_frac) - VIDEO_FONT_WIDTH - 1;
+ x = vid_priv->xsize - VID_TO_PIXEL(x_frac) - 1;
line = vid_priv->fb + linenum * vid_priv->line_length + x * pbytes;
for (row = 0; row < VIDEO_FONT_HEIGHT; row++) {