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| author | Ville Syrjala <syrjala@sci.fi> | 2008-03-04 14:28:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-04 16:35:13 -0800 |
| commit | 7e533705bd973267c488f8c3a7c7246ecad3a414 (patch) | |
| tree | 09afdadc6955aa10c226962f0d6607fb35c83124 /drivers/video/sm501fb.c | |
| parent | 19d06eff4e0d77fc1a15c92f845f1916e2d10dd0 (diff) | |
| download | linux-7e533705bd973267c488f8c3a7c7246ecad3a414.tar.gz linux-7e533705bd973267c488f8c3a7c7246ecad3a414.tar.bz2 linux-7e533705bd973267c488f8c3a7c7246ecad3a414.zip | |
sm501fb: fix timing limits
Vertical sync height register can only hold 6 bits. Fix the hsync start test
to use > instead of >=. Also add a few clarifying comments.
Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/sm501fb.c')
| -rw-r--r-- | drivers/video/sm501fb.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/video/sm501fb.c b/drivers/video/sm501fb.c index f49287c88abe..742b5c656d66 100644 --- a/drivers/video/sm501fb.c +++ b/drivers/video/sm501fb.c @@ -237,12 +237,14 @@ static int sm501fb_check_var(struct fb_var_screeninfo *var, /* check we can fit these values into the registers */ - if (var->hsync_len > 255 || var->vsync_len > 255) + if (var->hsync_len > 255 || var->vsync_len > 63) return -EINVAL; - if ((var->xres + var->right_margin) >= 4096) + /* hdisplay end and hsync start */ + if ((var->xres + var->right_margin) > 4096) return -EINVAL; + /* vdisplay end and vsync start */ if ((var->yres + var->lower_margin) > 2048) return -EINVAL; |