diff options
| author | Geert Uytterhoeven | 2021-07-27 15:47:29 +0200 |
|---|---|---|
| committer | Sam Ravnborg | 2021-07-27 17:18:23 +0200 |
| commit | 251e48a1db758ad7151e2dce146e63d9f4baf94b (patch) | |
| tree | 59b033aae9b2d0fc83a6dfb9749e1a60d5744f1a /mm/swapfile.c | |
| parent | 8a15af3b86f497109dc3a6646eb029d1f934684d (diff) | |
video: fbdev: ssd1307fb: Optimize screen updates
Currently, each screen update triggers an I2C transfer of all screen
data, up to 1 KiB of data for a 128x64 display, which takes at least 20
ms in Fast mode.
Reduce the amount of transferred data by only updating the rectangle
that changed. Remove the calls to ssd1307fb_set_col_range() and
ssd1307fb_set_page_range() during initialization, as
ssd1307fb_update_rect() now takes care of that.
Note that for now the optimized operation is only used for fillrect,
copyarea, and imageblit, which are used by fbcon.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727134730.3765898-5-geert@linux-m68k.org
Diffstat (limited to 'mm/swapfile.c')
0 files changed, 0 insertions, 0 deletions