diff options
| author | Krzysztof Helt <krzysztof.h1@wp.pl> | 2008-07-23 21:31:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-24 10:47:35 -0700 |
| commit | 65e93e038c8a6eb65b6907d6aed22a8ff1029d3a (patch) | |
| tree | 2ec53ab22bdb8c42b7b463d2676f08de06fcadc1 /drivers/video/tridentfb.c | |
| parent | 74a933feaf13f705e6c798d87efe6a9d758b3ca0 (diff) | |
tridentfb: preserve memory type settings
Do not overwrite bits which contain memory type settings. It removes
noise pixels ("snow") on Blade3D and 3DImage chips.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/tridentfb.c')
| -rw-r--r-- | drivers/video/tridentfb.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/video/tridentfb.c b/drivers/video/tridentfb.c index 62701c5570f..26bc4d75d4f 100644 --- a/drivers/video/tridentfb.c +++ b/drivers/video/tridentfb.c @@ -1095,7 +1095,10 @@ static int tridentfb_set_par(struct fb_info *info) vga_mm_wseq(par->io_virt, 4, 0x0E); /* memory mode enable bitmaps ?? */ /* divide clock by 2 if 32bpp chain4 mode display and CPU path */ - write3CE(par, MiscExtFunc, (bpp == 32) ? 0x1A : 0x12); + tmp = read3CE(par, MiscExtFunc) & 0xF0; + if (bpp == 32) + tmp |= 8; + write3CE(par, MiscExtFunc, tmp | 0x12); write3CE(par, 0x5, 0x40); /* no CGA compat, allow 256 col */ write3CE(par, 0x6, 0x05); /* graphics mode */ write3CE(par, 0x7, 0x0F); /* planes? */ |