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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>
This commit is contained in:
Simon Glass 2020-07-02 21:12:17 -06:00 committed by Bin Meng
parent a254d11dda
commit 9beb364a28
2 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/video/console_rotate.c
View File

@ -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++) {

2
test/dm/video.c
View File

@ -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;
}