vga16fb: restrict to blit rectangles with widths of multiples of 8 pixels
Advertise that vga16fb can only handle widths that are 8-pixel-multiple only
(software limitation). To ensure that a legal font is available, SELECT an
8x16 font in Kconfig.
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 75ec7d1..51c4b25 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -519,6 +519,7 @@
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select VGASTATE
+ select FONT_8x16 if FRAMEBUFFER_CONSOLE
help
This is the frame buffer device driver for VGA 16 color graphic
cards. Say Y if you have such a card.
diff --git a/drivers/video/vga16fb.c b/drivers/video/vga16fb.c
index ec4c7dc..6c580a0 100644
--- a/drivers/video/vga16fb.c
+++ b/drivers/video/vga16fb.c
@@ -1378,6 +1378,8 @@
info->fbops = &vga16fb_ops;
info->var = vga16fb_defined;
info->fix = vga16fb_fix;
+ /* supports 8-pixel wide blit rectangles only */
+ info->pixmap.blit_x = 1 << (8 - 1);
info->flags = FBINFO_FLAG_DEFAULT |
FBINFO_HWACCEL_YPAN;