diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 21:20:39 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 21:20:39 -0700 |
commit | 8d15b0ec32f20a57881dc073b2e8d11dea0ccceb (patch) | |
tree | 8aa3d4dfd0660807c3ce2893b35292b3b0e3bf08 /drivers/gpu/drm/radeon/radeon_fixed.h | |
parent | 005411c3e9147bc3b78215390e847d688dbbc163 (diff) | |
parent | cc8da5263fa743c33d6503f85113bcb70048e633 (diff) |
Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon: switch to using late_initcall
radeon legacy chips: tv dac bg/dac adj updates
drm/radeon: introduce kernel modesetting for radeon hardware
drm: Add the TTM GPU memory manager subsystem.
drm: Memory fragmentation from lost alignment blocks
drm/radeon: fix mobility flags on new PCI IDs.
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_fixed.h')
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_fixed.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_fixed.h b/drivers/gpu/drm/radeon/radeon_fixed.h new file mode 100644 index 00000000000..90187d17384 --- /dev/null +++ b/drivers/gpu/drm/radeon/radeon_fixed.h @@ -0,0 +1,50 @@ +/* + * Copyright 2009 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Dave Airlie + */ +#ifndef RADEON_FIXED_H +#define RADEON_FIXED_H + +typedef union rfixed { + u32 full; +} fixed20_12; + + +#define rfixed_const(A) (u32)(((A) << 12))/* + ((B + 0.000122)*4096)) */ +#define rfixed_const_half(A) (u32)(((A) << 12) + 2048) +#define rfixed_const_666(A) (u32)(((A) << 12) + 2731) +#define rfixed_const_8(A) (u32)(((A) << 12) + 3277) +#define rfixed_mul(A, B) ((u64)((u64)(A).full * (B).full + 2048) >> 12) +#define fixed_init(A) { .full = rfixed_const((A)) } +#define fixed_init_half(A) { .full = rfixed_const_half((A)) } +#define rfixed_trunc(A) ((A).full >> 12) + +static inline u32 rfixed_div(fixed20_12 A, fixed20_12 B) +{ + u64 tmp = ((u64)A.full << 13); + + do_div(tmp, B.full); + tmp += 1; + tmp /= 2; + return lower_32_bits(tmp); +} +#endif |