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Hans Verkuil eb5b16efb2 [media] v4l2-ctrls: improve discovery of controls of the same cluster 
The implementation of VIDIOC_G/S/TRY_EXT_CTRLS in the control framework has
to figure out which controls in the control list belong to the same cluster.
Since controls belonging to the same cluster need to be handled as a unit,
this is important information.

It did that by going over the controls in the list and for each control that
belonged to a multi-control cluster it would walk the remainder of the list
to try and find controls that belong to that same cluster.

This approach has two disadvantages:

1) it was a potentially quadratic algorithm (although highly unlikely that
it would ever be that bad in practice).
2) it took place with the control handler's lock held.

Since we want to make it possible in the future to change control values
from interrupt context, doing a lot of work while holding a lock is not a
good idea.

In the new code the algorithm is no longer quadratic but linear in the
number of controls in the list. Also, it now can be done beforehand.

Another change that was made was to so the try and set at the same time.
Before when S_TRY_EXT_CTRLS was called it would 'try' the controls first,
and then it would 'set' them. The idea was that any 'try' errors would
prevent the 'set' from happening, thus avoiding having partially set
control lists.

However, this caused more problems than it solved because between the 'try'
and the 'set' changes might have happened, so it had to try a second time,
and since actual controls with a try_ctrl op are very rare (and those that
we have just adjust values and do not return an error), I've decided to
drop that two-stage approach and just combine try and set.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-07-27 17:53:31 -03:00
..
davinci [media] davinci vpbe: VENC( Video Encoder) implementation 2011-07-27 17:53:10 -03:00
adv7343.h V4L/DVB (11743): Analog Devices ADV7343 video encoder driver 2009-06-16 18:20:59 -03:00
ak881x.h V4L/DVB: V4L: v4l2-subdev driver for AK8813 and AK8814 TV-encoders from AKM 2010-05-19 12:58:02 -03:00
atmel-isi.h [media] V4L: at91: add Atmel Image Sensor Interface (ISI) support 2011-07-27 17:53:23 -03:00
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 V4L/DVB: cx25840/ivtv: replace ugly priv control with s_config 2010-08-08 23:43:05 -03:00
i2c-addr.h V4L/DVB (9940): bt832: remove this driver 2008-12-30 09:39:25 -02:00
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.h Fix common misspellings 2011-03-31 11:26:23 -03:00
lirc_dev.h [media] lirc_dev: store cdev in irctl, up maxdevs 2011-06-11 09:03:20 -03:00
m5mols.h [media] m5mols: Use proper email address format 2011-06-11 09:46:00 -03:00
m52790.h
media-device.h [media] media: Links setup 2011-03-22 04:53:16 -03:00
media-devnode.h [media] media: Media device node support 2011-03-22 04:52:22 -03:00
media-entity.h [media] media: Pipelines and media streams 2011-03-22 04:53:17 -03:00
mmp-camera.h [media] marvell-cam: Basic working MMP camera driver 2011-07-27 17:53:01 -03:00
msp3400.h V4L/DVB (11380): v4l2-subdev: change s_routing prototype 2009-04-06 21:44:27 -03:00
mt9t112.h V4L/DVB (13670): soc-camera: Add mt9t112 camera driver 2009-12-16 09:27:41 -02:00
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
ov772x.h soc-camera: ov772x: Modify buswidth control 2010-02-26 15:11:00 -03:00
ov7670.h [media] marvell-cam: Move cafe-ccic into its own directory 2011-07-27 17:53:00 -03:00
pwc-ioctl.h v4l-dvb: remove legacy checks to allow support for kernels < 2.6.10 2008-07-20 07:17:52 -03:00
radio-si4713.h V4L/DVB (12551): FM TX: si4713: Add files to add radio interface for si4713 2009-09-12 12:19:19 -03:00
rc-core.h [media] rc-core: lirc use unsigned int 2011-07-27 17:52:59 -03:00
rc-map.h [media] rc: add tivo/nero liquidtv keymap 2011-05-20 09:27:29 -03:00
rj54n1cb0c.h V4L/DVB (13661): rj54n1cb0c: Add cropping, auto white balance, restrict sizes, add platform data 2009-12-16 09:27:30 -02:00
s5p_fimc.h [media] s5p-fimc: Add a platform data entry for MIPI-CSI data alignment 2011-03-22 04:54:18 -03:00
saa6588.h [media] saa6588: rename rds.h to saa6588.h 2010-12-29 08:17:18 -02:00
saa6752hs.h
saa7115.h V4L/DVB (8940): saa7115: fix saa7111(a) support 2008-10-12 09:37:00 -02:00
saa7127.h
saa7146.h [media] saa7146: Convert from .ioctl to .unlocked_ioctl 2011-01-19 11:28:10 -02:00
saa7146_vv.h V4L/DVB: saa7146: fix regression of the av7110/budget-av driver 2010-05-06 19:20:50 -03:00
sh_mobile_ceu.h V4L/DVB: V4L2: sh_mobile_camera_ceu: add support for CSI2 2010-08-02 16:43:40 -03:00
sh_mobile_csi2.h V4L/DVB: V4L2: soc-camera: add a MIPI CSI-2 driver for SH-Mobile platforms 2010-08-02 16:43:39 -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
soc_camera.h [media] V4L: soc-camera: remove several now unused soc-camera client operations 2011-07-27 17:53:23 -03:00
soc_camera_platform.h [media] V4L: soc_camera_platform: add helper functions to manage device instances 2011-05-20 07:26:14 -03:00
soc_mediabus.h [media] V4L: soc-camera: add a new packing for YUV 4:2:0 type formats 2011-05-20 12:05:08 -03:00
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] dib0700: add initial code for PCTV 340e by Davide Ferri 2011-07-27 17:52:25 -03:00
tvaudio.h V4L/DVB (11376): tvaudio.h: add static inline to retrieve the list of possible i2c addrs. 2009-04-06 21:44:25 -03:00
tveeprom.h V4L/DVB (8479): tveeprom/ivtv: fix usage of has_ir field 2008-07-26 12:54:42 -03:00
tvp514x.h V4L/DVB (12246): tvp514x: Migration to sub-device framework 2009-09-19 00:18:09 -03:00
tvp5150.h
tvp7002.h V4L/DVB: Definitions for TVP7002 in DM365 2010-02-26 15:11:01 -03:00
tw9910.h tw9910: use TABs for indentation 2010-02-26 15:10:59 -03:00
upd64031a.h
upd64083.h
v4l2-chip-ident.h [media] marvell-cam: Basic working MMP camera driver 2011-07-27 17:53:01 -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] v4l2-ctrls: improve discovery of controls of the same cluster 2011-07-27 17:53:31 -03:00
v4l2-dev.h [media] v4l: Fix media_entity_to_video_device macro argument name 2011-06-01 09:42:03 -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 optional merge and replace callbacks 2011-07-27 17:53:31 -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 V4L/DVB (10141): v4l2: debugging API changed to match against driver name instead of ID. 2009-01-02 17:11:52 -02:00
v4l2-ioctl.h [media] v4l2-ioctl: add priority handling support 2011-03-22 16:37:59 -03:00
v4l2-mediabus.h [media] v4l: Move the media/v4l2-mediabus.h header to include/linux 2011-03-22 04:53:21 -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] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -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 V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -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
videobuf2-core.h [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
videobuf2-dma-contig.h [media] videobuf2-dma-contig: make cookie() return a pointer to dma_addr_t 2011-03-22 19:41:58 -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
wm8775.h [media] Add proper audio support for Nova-S Plus with wm8775 ADC 2011-03-21 20:32:19 -03:00