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 ---
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; } }