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8ab75e3ecd
linux/include/media
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Hans Verkuil 8ab75e3ecd [media] v4l2-dev: make it possible to skip locking for selected ioctls 
Using the V4L2 core lock is a very robust method that is usually very good
at doing the right thing. But some drivers, particularly USB drivers, may
want to prevent the core from taking the lock for specific ioctls, particularly
buffer queuing ioctls.

The reason is that certain commands like S_CTRL can take a long time to process
over USB and all the time the core has the lock, preventing VIDIOC_DQBUF from
proceeding, even though a frame may be ready in the queue.

This introduces unwanted latency.

Since the buffer queuing commands often have their own internal lock it is
often not necessary to take the core lock. Drivers can now say that they don't
want the core to take the lock for specific ioctls.

As it is a specific opt-out it makes it clear to the reviewer that those
ioctls will need more care when reviewing.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-14 09:13:43 -03:00
..
blackfin [media] add blackfin capture bridge driver 2012-03-19 15:08:20 -03:00
davinci [media] davinci: vpif: remove machine specific header file includes 2012-02-08 10:46:54 -02:00
adp1653.h [media] adp1653: Add driver for LED flash controller 2011-07-27 17:55:39 -03:00
adv7183.h [media] adv7183: add adv7183 decoder driver 2012-03-19 15:04:10 -03:00
adv7343.h
ak881x.h
as3645a.h [media] as3645a: Add driver for LED flash controller 2011-12-20 09:36:18 -02:00
atmel-isi.h [media] atmel-isi: add code to enable/disable ISI_MCK clock 2012-01-06 11:01:11 -02:00
bt819.h [media] bt819: the ioctls in the header are internal to the kernel 2010-12-29 08:17:19 -02:00
cs53l32a.h
cs5345.h
cx2341x.h [media] v4l2-ctrls: use const char * const * for the menu arrays 2010-12-30 08:02:14 -02:00
cx25840.h [media] cx25840: Add a flag to enable the CX23888 DIF to be enabled or not 2012-01-05 06:49:38 -02:00
gpio-ir-recv.h [media] gpio-ir-recv: a couple signedness bugs 2012-03-19 15:45:01 -03:00
i2c-addr.h
ir-kbd-i2c.h [media] rc: Rename remote controller type to rc_type instead of ir_type 2010-12-29 08:16:50 -02:00
lirc_dev.h [media] lirc_dev: store cdev in irctl, up maxdevs 2011-06-11 09:03:20 -03:00
lirc.h Fix common misspellings 2011-03-31 11:26:23 -03:00
m5mols.h [media] m5mols: Remove superfluous irq field from the platform data struct 2011-09-24 00:23:03 -03:00
m52790.h
media-device.h device.h: audit and cleanup users in main include dir 2012-03-16 10:38:24 -04:00
media-devnode.h [media] media: Media device node support 2011-03-22 04:52:22 -03:00
media-entity.h [media] media: Add link_validate() op to check links to the sink pad 2012-05-14 08:44:11 -03:00
mmp-camera.h [media] marvell-cam: Basic working MMP camera driver 2011-07-27 17:53:01 -03:00
msp3400.h
mt9m032.h [media] v4l: Add driver for Micron MT9M032 camera sensor 2012-03-19 18:56:33 -03:00
mt9p031.h [media] mt9p031: Aptina (Micron) MT9P031 5MP sensor driver 2011-09-11 09:49:28 -03:00
mt9t001.h [media] mt9t001: Aptina (Micron) MT9T001 3MP sensor driver 2011-09-21 15:31:08 -03:00
mt9t112.h
mt9v011.h [media] v4l2-subdev: remove core.s_config and v4l2_i2c_new_subdev_cfg() 2011-01-19 11:45:30 -02:00
mt9v032.h [media] v4l: Add mt9v032 sensor driver 2011-05-20 09:29:49 -03:00
noon010pc30.h [media] Add v4l2 subdev driver for NOON010PC30L image sensor 2011-03-21 20:31:40 -03:00
omap1_camera.h [media] SoC Camera: add driver for OMAP1 camera interface 2010-10-21 07:55:37 -02:00
omap3isp.h [media] omap3isp: Add lane configuration to platform data 2012-05-14 08:50:23 -03:00
ov772x.h [media] V4L: ov772x: remove superfluous soc-camera client operations 2011-11-03 18:28:05 -02:00
ov7670.h [media] marvell-cam: Move cafe-ccic into its own directory 2011-07-27 17:53:00 -03:00
radio-si4713.h
rc-core.h [media] rc-core.h: Surround macro with do {} while (0) 2011-09-03 20:56:22 -03:00
rc-map.h [media] ati_remote: add support for Medion X10 Digitainer remote 2012-04-11 02:05:46 -03:00
rj54n1cb0c.h
s5k6aa.h [media] v4l: Add v4l2 subdev driver for S5K6AAFX sensor 2011-11-03 18:29:11 -02:00
s5p_fimc.h [media] s5p-fimc: Convert to use generic media bus polarity flags 2011-09-24 00:22:31 -03:00
s5p_hdmi.h [media] v4l: s5p-tv: hdmi: add support for platform data 2012-02-28 18:26:40 -03:00
saa6588.h [media] saa6588: rename rds.h to saa6588.h 2010-12-29 08:17:18 -02:00
saa6752hs.h
saa7115.h
saa7127.h
saa7146_vv.h
saa7146.h Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
sh_mobile_ceu.h [media] V4L: sh_mobile_ceu_camera: maximum image size depends on the hardware version 2012-03-19 22:11:06 -03:00
sh_mobile_csi2.h [media] V4L: sh_mobile_csi2: switch away from using the soc-camera bus notifier 2011-07-27 17:56:08 -03:00
sh_vou.h [media] sh_vou: Don't use module names to load I2C modules 2010-10-22 21:53:33 -02:00
si4713.h [media] radio-si4713: Add regulator framework support 2010-12-29 08:16:35 -02:00
sii9234.h [media] v4l: s5p-tv: add sii9234 driver 2012-02-28 18:25:46 -03:00
smiapp.h [media] smiapp: Add driver 2012-05-14 09:06:00 -03:00
soc_camera_platform.h [media] V4L: soc_camera_platform: remove superfluous soc-camera client operations 2011-11-03 18:28:12 -02:00
soc_camera.h [media] soc-camera: remove redundant parameter from .set_bus_param() 2012-01-06 11:00:23 -02:00
soc_mediabus.h [media] V4L: soc-camera: add helper functions for new bus configuration type 2011-11-03 18:27:13 -02:00
sr030pc30.h [media] Add driver for Siliconfile SR030PC30 VGA camera 2010-10-21 07:55:49 -02:00
timb_radio.h [media] radio-timb: Simplified platform data 2011-07-27 17:53:07 -03:00
timb_video.h [media] media: Add timberdale video-in driver 2010-12-29 08:16:46 -02:00
tuner-types.h
tuner.h [media] tuner: add support for Xceive XC5000C 2012-02-14 17:20:46 -02:00
tvaudio.h
tveeprom.h
tvp514x.h
tvp5150.h
tvp7002.h
tw9910.h
upd64031a.h
upd64083.h
v4l2-chip-ident.h [media] vs6624: add vs6624 sensor driver 2012-03-19 15:04:26 -03:00
v4l2-common.h [media] v4l2_prio: move from v4l2-common to v4l2-dev 2011-03-22 16:37:54 -03:00
v4l2-ctrls.h [media] v4l: Allow changing control handler lock 2012-05-14 08:46:27 -03:00
v4l2-dev.h [media] v4l2-dev: make it possible to skip locking for selected ioctls 2012-05-14 09:13:43 -03:00
v4l2-device.h [media] v4l2-device: fix a macro definition 2011-04-13 09:53:29 -03:00
v4l2-event.h [media] v4l2-event: Add v4l2_subscribed_event_ops 2012-05-07 16:28:35 -03:00
v4l2-fh.h [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -03:00
v4l2-int-device.h include: replace linux/module.h with "struct module" wherever possible 2011-10-31 19:32:32 -04:00
v4l2-ioctl.h The following text was taken from the original review request: 2012-03-24 10:41:37 -07:00
v4l2-mediabus.h [media] v4l2: Add polarity flag definitions for the parallel bus FIELD signal 2011-09-24 00:21:31 -03:00
v4l2-mem2mem.h [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
v4l2-subdev.h [media] v4l: Implement v4l2_subdev_link_validate() 2012-05-14 08:45:31 -03:00
videobuf2-core.h [media] vb2: add vb2_get_unmapped_area in vb2 core 2011-11-03 18:29:13 -02:00
videobuf2-dma-contig.h [media] media: vb2: dma contig allocator: use dma_addr instread of paddr 2011-09-06 15:05:10 -03:00
videobuf2-dma-sg.h [media] v4l: videobuf2: add DMA scatter/gather allocator 2011-03-21 20:31:34 -03:00
videobuf2-memops.h [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
videobuf2-vmalloc.h [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
videobuf-core.h [media] V4L: remove V4L1 compatibility mode 2010-12-29 08:17:07 -02:00
videobuf-dma-contig.h V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -02:00
videobuf-dma-sg.h doc: fix broken references 2011-09-27 18:08:04 +02:00
videobuf-dvb.h [media] Add missing include guard to header file 2011-05-25 21:42:30 -03:00
videobuf-vmalloc.h V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -02:00
wm8775.h [media] Add proper audio support for Nova-S Plus with wm8775 ADC 2011-03-21 20:32:19 -03:00