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authorAntonino A. Daplas <adaplas@gmail.com>2005-11-08 21:39:05 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-09 07:56:34 -0800
commit6d83b0bb8e5efda28ce4a1abc78277f1d03e50e5 (patch)
tree9fbf5337bb2428f94dcf428b3387f3198b56ad28 /drivers/video/savage
parent64c7c8f88559624abdbe12b5da6502e8879f8d28 (diff)
[PATCH] savagefb: X-panning fixes
The driver unconditionally sets xpanstep to 2. However, a value of 4 empirically works better at bpp = 8, and 2 for 16 and 32. This buglet was exposed by the rotation code. Second fix is the unconditional call to update_start() without verifying if the offsets are correct. Remove this call, it's not necessary and secondly, it causes a crash with invalid values. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/savage')
-rw-r--r--drivers/video/savage/savagefb_driver.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/video/savage/savagefb_driver.c b/drivers/video/savage/savagefb_driver.c
index f0dfb35e319..09e2f284190 100644
--- a/drivers/video/savage/savagefb_driver.c
+++ b/drivers/video/savage/savagefb_driver.c
@@ -1315,10 +1315,14 @@ static void savagefb_set_fix(struct fb_info *info)
info->fix.line_length = info->var.xres_virtual *
info->var.bits_per_pixel / 8;
- if (info->var.bits_per_pixel == 8)
+ if (info->var.bits_per_pixel == 8) {
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
- else
+ info->fix.xpanstep = 4;
+ } else {
info->fix.visual = FB_VISUAL_TRUECOLOR;
+ info->fix.xpanstep = 2;
+ }
+
}
#if defined(CONFIG_FB_SAVAGE_ACCEL)
@@ -1363,7 +1367,6 @@ static int savagefb_set_par (struct fb_info *info)
par->minClock = 10000;
savagefb_set_par_int (par);
- savagefb_update_start (par, var);
fb_set_cmap (&info->cmap, info);
savagefb_set_fix(info);
savagefb_set_clip(info);
@@ -1873,7 +1876,6 @@ static int __devinit savage_init_fb_info (struct fb_info *info,
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.type_aux = 0;
- info->fix.xpanstep = 2;
info->fix.ypanstep = 1;
info->fix.ywrapstep = 0;
info->fix.accel = id->driver_data;