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x86: video: Add support for CONFIG_CONSOLE_SCROLL_LINES

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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 <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Simon Glass 2015-01-01 16:17:57 -07:00
parent 4a2708a097
commit 3c0b668f66
1 changed files with 17 additions and 9 deletions
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26
drivers/video/cfb_console.c
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@ -299,7 +299,11 @@ 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
@ -740,26 +744,33 @@ 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)
@ -871,9 +882,6 @@ static void console_newline(int n)
if (console_row >= CONSOLE_ROWS) {
/* Scroll everything up */
console_scrollup();
/* Decrement row number */
console_row = CONSOLE_ROWS - 1;
}
}