[PATCH 06/26] video: Adjust rotated console to start at right edge

Simon Glass
2020-05-19T23:10:38Z

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>
---

drivers/video/console_rotate.c | 2 +-
test/dm/video.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/console_rotate.c b/drivers/video/console_rotate.c
index 8bb05ae02c..da0ce7b9ce 100644
--- 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 0664e3f22b..68f5ba44e7 100644
--- 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;
}
--
2.26.2.761.g0e0b3e54be-goog