Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bf26ad72a60c0009a99179b449a43daa6bf4b4f6
Commit: bf26ad72a60c0009a99179b449a43daa6bf4b4f6
Parent: dc0e6e0544f1cb2af44e5d7a7e68acda05dec6fa
Author: Antonino A. Daplas <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 00:39:09 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:15:30 2007 -0700
fbdev: advertise limitation of drawing engine
A few drivers are not capable of blitting rectangles of any dimension.
vga16fb can only blit 8-pixel wide rectangles, while s3fb (in tileblitting
mode) can only blit 8x16 rectangles. For example, loading a 12x22 font in
vga16fb will result in a corrupt display.
Advertise this limitation/capability in info->pixmap.blit_x and blit_y.
These
fields are 32-bit arrays (font max is 32x32 only), ie, if bit 7 is set, then
width/height of 7+1 is supported.
Signed-off-by: Antonino Daplas <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/video/fbmem.c | 6 ++++++
include/linux/fb.h | 4 ++++
2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 7b72841..c4ce3e4 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1321,6 +1321,12 @@ register_framebuffer(struct fb_info *fb_info)
}
fb_info->pixmap.offset = 0;
+ if (!fb_info->pixmap.blit_x)
+ fb_info->pixmap.blit_x = ~(u32)0;
+
+ if (!fb_info->pixmap.blit_y)
+ fb_info->pixmap.blit_y = ~(u32)0;
+
if (!fb_info->modelist.prev || !fb_info->modelist.next)
INIT_LIST_HEAD(&fb_info->modelist);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 70d154a..619ba1e 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -558,6 +558,10 @@ struct fb_pixmap {
u32 scan_align; /* alignment per scanline */
u32 access_align; /* alignment per read/write (bits) */
u32 flags; /* see FB_PIXMAP_* */
+ u32 blit_x; /* supported bit block dimensions (1-32)*/
+ u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
+ /* blit_y = 1 << (height - 1) */
+ /* if 0, will be set to 0xffffffff (all)*/
/* access methods */
void (*writeio)(struct fb_info *info, void __iomem *dst, void *src,
unsigned int size);
void (*readio) (struct fb_info *info, void *dst, void __iomem *src,
unsigned int size);
-
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