linux-toradex.git/include/drm/drm_fixed.h, branch v4.4.93 Linux kernel for Apalis and Colibri modules drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil 2016-03-03T23:07:20+00:00 Harry Wentland harry.wentland@amd.com 2016-01-22T22:07:25+00:00 b870070037823bea90709ea6b4b8a2c8ffcdc5f5 commit 64566b5e767f9bc3161055ca1b443a51afb52aad upstream. drm_fixp_from_fraction allows us to create a fixed point directly from a fraction, rather than creating fixed point values and dividing later. This avoids overflow of our 64 bit value for large numbers. drm_fixp2int_ceil allows us to return the ceiling of our fixed point value. [airlied: squash Jordan's fix] 32-bit-build-fix: Jordan Lazare <Jordan.Lazare@amd.com> Signed-off-by: Harry Wentland <harry.wentland@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 64566b5e767f9bc3161055ca1b443a51afb52aad upstream.

drm_fixp_from_fraction allows us to create a fixed point directly
from a fraction, rather than creating fixed point values and dividing
later. This avoids overflow of our 64 bit value for large numbers.

drm_fixp2int_ceil allows us to return the ceiling of our fixed point
value.

[airlied: squash Jordan's fix]
32-bit-build-fix: Jordan Lazare <Jordan.Lazare@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm: fix 64 bit drm fixed point helpers 2013-07-30T21:24:13+00:00 Alex Deucher alexander.deucher@amd.com 2013-07-30T20:43:55+00:00 a838834b2f7cbc09b6319a1fc332c03e4d665b20 Sign bit wasn't handled properly and a small typo. Thanks to Christian for helping me sort this out. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
Sign bit wasn't handled properly and a small typo.

Thanks to Christian for helping me sort this out.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm: add some additional fixed point helpers (v3) 2013-06-27T23:16:37+00:00 Alex Deucher alexander.deucher@amd.com 2013-03-22T14:35:50+00:00 210a0b9e212370ed8c2784c2115e7ff4bb1259bd Required for certain driver calculations. Code was written by Christian König and ported to the drm by me. v2: fix 64 bit divides v3: fix 64 bit for real (math64.h) Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
Required for certain driver calculations.  Code
was written by Christian König and ported to the
drm by me.

v2: fix 64 bit divides
v3: fix 64 bit for real (math64.h)

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm: fixed: Add dfixed_frac 2012-04-27T08:29:35+00:00 Robert Morell rmorell@nvidia.com 2012-04-25T09:45:01+00:00 f7f6c340f9d8f11bee50aef647b8578348957936 This helper macro retrieves the fractional part of a fixed20_12 20.12 fixed-point number. Signed-off-by: Robert Morell <rmorell@nvidia.com> Signed-off-by: Olof Johansson <olofj@chromium.org> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Dave Airlie <airlied@redhat.com> 
This helper macro retrieves the fractional part of a fixed20_12 20.12
fixed-point number.

Signed-off-by: Robert Morell <rmorell@nvidia.com>
Signed-off-by: Olof Johansson <olofj@chromium.org>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drm: move radeon_fixed.h to shared drm_fixed.h header 2010-05-18T08:21:33+00:00 Ben Skeggs bskeggs@redhat.com 2010-04-28T01:46:42+00:00 68adac5e49436992e9c999fbae879d9ac5b72d4e Will be used by nouveau driver also in the near future. Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com> 
Will be used by nouveau driver also in the near future.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>