linux/drivers
Laurent Pinchart 310fe52461 V4L/DVB (13827): uvcvideo: Switch to a monotonic clock for V4L2 buffers timestamps
The realtime clock provided by do_gettimeofday() is affected by time
jumps caused by NTP or DST. Furthermore, preliminary investigation
showed that SMP systems the realtime clock is based on the CPU TSC,
and those could get slightly out of sync, resulting in jitter in the
timestamps depending on which processor handles the USB interrupts.

Instead of the realtime clock, use a monotonic high resolution clock to
timestamp the buffer. As this could in theory introduce a regression
with some userspace applications expecting a realtime clock timestamp,
add a module parameter to switch back to the realtime clock.

Thanks to Paulo Assis for pointing out and investigating the issue.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-02-26 15:10:24 -03:00
..
accessibility
acpi Merge branch 'pcc' into release 2010-02-23 00:39:00 -05:00
amba
ata [libata] Call flush_dcache_page after PIO data transfers in libata-sff.c 2010-02-04 01:04:50 -05:00
atm
auxdisplay
base class: Free the class private data in class_release 2010-02-16 15:43:00 -08:00
block cciss: Make cciss_seq_show handle holes in the h->drv[] array 2010-02-05 13:15:36 +01:00
bluetooth Bluetooth: Fix memory leak in Marvell BT-over-SDIO driver 2010-02-03 19:08:30 -08:00
cdrom
char Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-02-11 14:01:10 -08:00
clocksource geode-mfgpt: restore previous behavior for selecting IRQ 2010-02-22 19:50:34 -08:00
connector connector: Delete buggy notification code. 2010-02-02 15:58:48 -08:00
cpufreq [CPUFREQ] Fix ondemand to not request targets outside policy limits 2010-01-13 10:55:16 -05:00
cpuidle
crypto crypto: padlock-sha - Add import/export support 2010-02-02 06:50:25 +11:00
dca
dio
dma drivers/dma: Correct NULL test 2010-02-10 12:07:28 -07:00
edac Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp 2010-02-11 14:07:13 -08:00
eisa
firewire firewire: ohci: retransmit isochronous transmit packets on cycle loss 2010-02-14 15:10:41 +01:00
firmware
gpio
gpu Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-02-23 18:13:34 -08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2010-01-13 16:10:13 -08:00
hwmon hwmon: (w83781d) Request I/O ports individually for probing 2010-02-05 19:58:36 +01:00
i2c i2c-tiny-usb: Fix on big-endian systems 2010-02-05 17:48:13 +01:00
ide
idle
ieee1394
ieee802154
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2010-02-11 14:01:25 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-02-22 08:48:06 -08:00
isdn
leds
lguest
macintosh powerpc/macintosh: Make Open Firmware device id constant 2010-01-15 13:26:04 +11:00
mca
md dm: sysfs revert add empty release function to avoid debug warning 2010-02-16 18:43:04 +00:00
media V4L/DVB (13827): uvcvideo: Switch to a monotonic clock for V4L2 buffers timestamps 2010-02-26 15:10:24 -03:00
memstick
message [SCSI] mptfusion : mptscsih_abort return value should be SUCCESS instead of value 0. 2010-02-08 13:40:17 -06:00
mfd mfd: Fix asic3 build 2010-01-29 21:03:09 +01:00
misc
mmc mmc_test: block addressed cards 2010-02-11 13:59:42 -08:00
mtd Merge branch 'for-linus' of git://git.infradead.org/ubi-2.6 2010-01-28 12:57:50 -08:00
net Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2010-02-23 01:27:05 -08:00
nubus
of
oprofile
parisc
parport
pci Merge branches 'bugzilla-14886', 'bugzilla-15000', 'bugzilla-15040', 'bugzilla-15108', 'pdc', 'hotplug-null-ref' and 'thinkpad' into release 2010-02-18 03:51:04 -05:00
pcmcia
platform acer-wmi: Respect current backlight level when loading 2010-02-19 00:19:26 -05:00
pnp
power wm97xx_battery: Handle missing platform data gracefully 2010-01-29 17:00:18 +03:00
pps
ps3
rapidio
regulator regulator/lp3971: vol_map out of bounds in lp3971_{ldo,dcdc}_set_voltage() 2010-02-12 11:39:49 +00:00
rtc rtc-fm3130: add missing braces 2010-02-02 18:11:21 -08:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2010-02-11 14:05:55 -08:00
sbus
scsi Merge master.kernel.org:/home/rmk/linux-2.6-arm 2010-02-20 16:55:05 -08:00
serial serial: 8250: add serial transmitter fully empty test 2010-02-16 15:55:51 -08:00
sfi
sh
sn
spi spi: spi_sh_msiof: Fixed data sampling on the correct edge 2010-02-02 11:29:15 +09:00
ssb ssb: Fix CONFIG_SSB_SDIOHOST typo 2010-02-03 16:55:20 -05:00
staging Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-02-01 10:46:49 -08:00
tc
telephony
thermal
uio
usb USB: gadget: fix EEM gadget CRC usage 2010-02-16 15:11:10 -08:00
uwb
video efifb: fix framebuffer handoff 2010-02-22 19:50:34 -08:00
virtio virtio: fix section mismatch warnings 2010-01-16 12:15:39 -08:00
vlynq
w1
watchdog [WATCHDOG] bfin: fix max timeout calculation 2010-02-21 19:16:30 +00:00
xen xen: fix hang on suspend. 2010-01-13 10:01:35 +00:00
zorro
Kconfig
Makefile