Some machines are very slow to scroll their displays. To cope with this,
support the CONFIG_CONSOLE_SCROLL_LINES option. Setting this to 5 allows
the display to operate at an acceptable speed by scrolling 5 lines at
a time.
This same option is available for LCDs so when these systems are unified
this code can be unified also.
Signed-off-by: Simon Glass <s...@chromium.org>
---
drivers/video/cfb_console.c | 26 +++++++++++++++++---------
1 file changed, 17 insertions(+), 9 deletions(-)
diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
index a653bb4..75cdf61 100644
--- a/drivers/video/cfb_console.c
+++ b/drivers/video/cfb_console.c
@@ -312,7 +312,11 @@ void console_cursor(int state);
#define CONSOLE_ROW_SECOND (video_console_address + CONSOLE_ROW_SIZE)
#define CONSOLE_ROW_LAST (video_console_address + CONSOLE_SIZE -
CONSOLE_ROW_SIZE)
#define CONSOLE_SIZE (CONSOLE_ROW_SIZE * CONSOLE_ROWS)
-#define CONSOLE_SCROLL_SIZE (CONSOLE_SIZE - CONSOLE_ROW_SIZE)
+
+/* By default we scroll by a single line */
+#ifndef CONFIG_CONSOLE_SCROLL_LINES
+#define CONFIG_CONSOLE_SCROLL_LINES 1
+#endif
/* Macros */
#ifdef VIDEO_FB_LITTLE_ENDIAN
@@ -753,26 +757,33 @@ static void console_clear_line(int line, int begin, int
end)
static void console_scrollup(void)
{
+ const int rows = CONFIG_CONSOLE_SCROLL_LINES;
+ int i;
+
/* copy up rows ignoring the first one */
#ifdef VIDEO_HW_BITBLT
video_hw_bitblt(VIDEO_PIXEL_SIZE, /* bytes per pixel */
0, /* source pos x */
video_logo_height +
- VIDEO_FONT_HEIGHT, /* source pos y */
+ VIDEO_FONT_HEIGHT * rows, /* source pos y */
0, /* dest pos x */
video_logo_height, /* dest pos y */
VIDEO_VISIBLE_COLS, /* frame width */
VIDEO_VISIBLE_ROWS
- video_logo_height
- - VIDEO_FONT_HEIGHT /* frame height */
+ - VIDEO_FONT_HEIGHT * rows /* frame height */
);
#else
- memcpyl(CONSOLE_ROW_FIRST, CONSOLE_ROW_SECOND,
- CONSOLE_SCROLL_SIZE >> 2);
+ memcpyl(CONSOLE_ROW_FIRST, CONSOLE_ROW_FIRST + rows * CONSOLE_ROW_SIZE,
+ (CONSOLE_SIZE - CONSOLE_ROW_SIZE * rows) >> 2);
#endif
/* clear the last one */
- console_clear_line(CONSOLE_ROWS - 1, 0, CONSOLE_COLS - 1);
+ for (i = 1; i <= rows; i++)
+ console_clear_line(CONSOLE_ROWS - i, 0, CONSOLE_COLS - 1);
+
+ /* Decrement row number */
+ console_row -= rows;
}
static void console_back(void)
@@ -884,9 +895,6 @@ static void console_newline(int n)
if (console_row >= CONSOLE_ROWS) {
/* Scroll everything up */
console_scrollup();
-
- /* Decrement row number */
- console_row = CONSOLE_ROWS - 1;
}
}
--
2.2.0.rc0.207.ga3a616c
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