16 Dec, 2014
1 commit
-
Pull drm updates from Dave Airlie:
"Highlights:- AMD KFD driver merge
This is the AMD HSA interface for exposing a lowlevel interface for
GPGPU use. They have an open source userspace built on top of this
interface, and the code looks as good as it was going to get out of
tree.- Initial atomic modesetting work
The need for an atomic modesetting interface to allow userspace to
try and send a complete set of modesetting state to the driver has
arisen, and been suffering from neglect this past year. No more,
the start of the common code and changes for msm driver to use it
are in this tree. Ongoing work to get the userspace ioctl finished
and the code clean will probably wait until next kernel.- DisplayID 1.3 and tiled monitor exposed to userspace.
Tiled monitor property is now exposed for userspace to make use of.
- Rockchip drm driver merged.
- imx gpu driver moved out of staging
Other stuff:
- core:
panel - MIPI DSI + new panels.
expose suggested x/y properties for virtual GPUs- i915:
Initial Skylake (SKL) support
gen3/4 reset work
start of dri1/ums removal
infoframe tracking
fixes for lots of things.- nouveau:
tegra k1 voltage support
GM204 modesetting support
GT21x memory reclocking work- radeon:
CI dpm fixes
GPUVM improvements
Initial DPM fan control- rcar-du:
HDMI support added
removed some support for old boards
slave encoder driver for Analog Devices adv7511- exynos:
Exynos4415 SoC support- msm:
a4xx gpu support
atomic helper conversion- tegra:
iommu support
universal plane support
ganged-mode DSI support- sti:
HDMI i2c improvements- vmwgfx:
some late fixes.- qxl:
use suggested x/y properties"* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (969 commits)
drm: sti: fix module compilation issue
drm/i915: save/restore GMBUS freq across suspend/resume on gen4
drm: sti: correctly cleanup CRTC and planes
drm: sti: add HQVDP plane
drm: sti: add cursor plane
drm: sti: enable auxiliary CRTC
drm: sti: fix delay in VTG programming
drm: sti: prepare sti_tvout to support auxiliary crtc
drm: sti: use drm_crtc_vblank_{on/off} instead of drm_vblank_{on/off}
drm: sti: fix hdmi avi infoframe
drm: sti: remove event lock while disabling vblank
drm: sti: simplify gdp code
drm: sti: clear all mixer control
drm: sti: remove gpio for HDMI hot plug detection
drm: sti: allow to change hdmi ddc i2c adapter
drm/doc: Document drm_add_modes_noedid() usage
drm/i915: Remove '& 0xffff' from the mask given to WA_REG()
drm/i915: Invert the mask and val arguments in wa_add() and WA_REG()
drm: Zero out DRM object memory upon cleanup
drm/i915/bdw: Fix the write setting up the WIZ hashing mode
...
05 Dec, 2014
1 commit
-
We've lost the +1 required for correct timeouts in
commit 5ed0bdf21a85d78e04f89f15ccf227562177cbd9
Author: Thomas Gleixner
Date: Wed Jul 16 21:05:06 2014 +0000drm: i915: Use nsec based interfaces
Use ktime_get_raw_ns() and get rid of the back and forth timespec
conversions.Signed-off-by: Thomas Gleixner
Acked-by: Daniel Vetter
Signed-off-by: John StultzSo fix this up by reinstating our handrolled _timeout function. While
at it bother with handling MAX_JIFFIES.v2: Convert to usecs (we don't care about the accuracy anyway) first
to avoid overflow issues Dave Gordon spotted.v3: Drop the explicit MAX_JIFFY_OFFSET check, usecs_to_jiffies should
take care of that already. It might be a bit too enthusiastic about it
though.v4: Chris has a much nicer color, so use his implementation.
This requires to export nsec_to_jiffies from time.c.
Cc: Chris Wilson
Cc: Dave Gordon
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82749
Cc: Thomas Gleixner
Cc: John Stultz
Signed-off-by: Daniel Vetter
Acked-by: John Stultz
Signed-off-by: Jani Nikula
22 Nov, 2014
1 commit
-
As part of addressing "y2038 problem" for in-kernel uses, this
patch adds safe mktime64() using time64_t.After this patch, mktime() is deprecated and all its call sites
will be fixed using mktime64(), after that it can be removed.Signed-off-by: pang.xunlei
Signed-off-by: John Stultz
13 Sep, 2014
1 commit
-
timeval_to_jiffies tried to round a timeval up to an integral number
of jiffies, but the logic for doing so was incorrect: intervals
corresponding to exactly N jiffies would become N+1. This manifested
itself particularly repeatedly stopping/starting an itimer:setitimer(ITIMER_PROF, &val, NULL);
setitimer(ITIMER_PROF, NULL, &val);would add a full tick to val, _even if it was exactly representable in
terms of jiffies_ (say, the result of a previous rounding.) Doing
this repeatedly would cause unbounded growth in val. So fix the math.Here's what was wrong with the conversion: we essentially computed
(eliding seconds)jiffies = usec * (NSEC_PER_USEC/TICK_NSEC)
by using scaling arithmetic, which took the best approximation of
NSEC_PER_USEC/TICK_NSEC with denominator of 2^USEC_JIFFIE_SC =
x/(2^USEC_JIFFIE_SC), and computed:jiffies = (usec * x) >> USEC_JIFFIE_SC
and rounded this calculation up in the intermediate form (since we
can't necessarily exactly represent TICK_NSEC in usec.) But the
scaling arithmetic is a (very slight) *over*approximation of the true
value; that is, instead of dividing by (1 usec/ 1 jiffie), we
effectively divided by (1 usec/1 jiffie)-epsilon (rounding
down). This would normally be fine, but we want to round timeouts up,
and we did so by adding 2^USEC_JIFFIE_SC - 1 before the shift; this
would be fine if our division was exact, but dividing this by the
slightly smaller factor was equivalent to adding just _over_ 1 to the
final result (instead of just _under_ 1, as desired.)In particular, with HZ=1000, we consistently computed that 10000 usec
was 11 jiffies; the same was true for any exact multiple of
TICK_NSEC.We could possibly still round in the intermediate form, adding
something less than 2^USEC_JIFFIE_SC - 1, but easier still is to
convert usec->nsec, round in nanoseconds, and then convert using
time*spec*_to_jiffies. This adds one constant multiplication, and is
not observably slower in microbenchmarks on recent x86 hardware.Tested: the following program:
int main() {
struct itimerval zero = {{0, 0}, {0, 0}};
/* Initially set to 10 ms. */
struct itimerval initial = zero;
initial.it_interval.tv_usec = 10000;
setitimer(ITIMER_PROF, &initial, NULL);
/* Save and restore several times. */
for (size_t i = 0; i < 10; ++i) {
struct itimerval prev;
setitimer(ITIMER_PROF, &zero, &prev);
/* on old kernels, this goes up by TICK_USEC every iteration */
printf("previous value: %ld %ld %ld %ld\n",
prev.it_interval.tv_sec, prev.it_interval.tv_usec,
prev.it_value.tv_sec, prev.it_value.tv_usec);
setitimer(ITIMER_PROF, &prev, NULL);
}
return 0;
}Cc: stable@vger.kernel.org
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Paul Turner
Cc: Richard Cochran
Cc: Prarit Bhargava
Reviewed-by: Paul Turner
Reported-by: Aaron Jacobs
Signed-off-by: Andrew Hunter
[jstultz: Tweaked to apply to 3.17-rc]
Signed-off-by: John Stultz
24 Jul, 2014
3 commits
-
Required for moving drivers to the nanosecond based interfaces.
Signed-off-by: Thomas Gleixner
Signed-off-by: John Stultz -
Right now we have time related prototypes in 3 different header
files. Move it to a single timekeeping header file and move the core
internal stuff into a core private header.Signed-off-by: Thomas Gleixner
Signed-off-by: John Stultz -
Helper and conversion functions for timespec64.
Signed-off-by: John Stultz
Signed-off-by: Thomas Gleixner
Signed-off-by: John Stultz
23 Jun, 2014
1 commit
-
Except for Kconfig.HZ. That needs a separate treatment.
Signed-off-by: Thomas Gleixner