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 (file)
--- a/drivers/video/console_rotate.c
+++ b/drivers/video/console_rotate.c
@@ -212,7 +212,7 @@ static int console_putc_xy_2(struct udevice *dev, uint x_frac, uint y, char ch)
        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++) {

diff --git a/test/dm/video.c b/test/dm/video.c
index 0664e3f..68f5ba4 100644 (file)
--- a/test/dm/video.c
+++ b/test/dm/video.c
@@ -251,7 +251,7 @@ DM_TEST(dm_test_video_rotation1, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 /* Test rotated text output through the console uclass */
 static int dm_test_video_rotation2(struct unit_test_state *uts)
 {
-       ut_assertok(check_vidconsole_output(uts, 2, 785, 446));
+       ut_assertok(check_vidconsole_output(uts, 2, 783, 445));
 
        return 0;
 }