linux-toradex.git/Documentation/video4linux, branch v3.5.1

Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

2012-05-24T17:21:51+00:00

Pull media updates from Mauro Carvalho Chehab:
 - some V4L2 API updates needed by embedded devices
 - DVB API extensions for ATSC-MH delivery system, used in US for mobile
   TV
 - new tuners for fc0011/0012/0013 and tua9001
 - a new dvb driver for af9033/9035
 - a new ATSC-MH frontend (lg2160)
 - new remote controller keymaps
 - Removal of a few legacy webcam driver that got replaced by gspca on
   several kernel versions ago
 - a new driver for Exynos 4/5 webcams(s5pp fimc-lite)
 - a new webcam sensor driver (smiapp)
 - a new video input driver for embedded (sta2x1xx)
 - several improvements, fixes, cleanups, etc inside the drivers.

Manually fix up conflicts due to err() -> dev_err() conversion in
drivers/staging/media/easycap/easycap_main.c

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (484 commits)
  [media] saa7134-cards: Remove a PCI entry added by mistake
  [media] radio-sf16fmi: add support for SF16-FMD
  [media] rc-loopback: remove duplicate line
  [media] patch for Asus My Cinema PS3-100 (1043:48cd)
  [media] au0828: Move the Kconfig knob under V4L_USB_DRIVERS
  [media] em28xx: simple comment fix
  [media] [resend] radio-sf16fmr2: add PnP support for SF16-FMD2
  [media] smiapp: Use v4l2_ctrl_new_int_menu() instead of v4l2_ctrl_new_custom()
  [media] smiapp: Add support for 8-bit uncompressed formats
  [media] smiapp: Allow generic quirk registers
  [media] smiapp: Use non-binning limits if the binning limit is zero
  [media] smiapp: Initialise rval in smiapp_read_nvm()
  [media] smiapp: Round minimum pre_pll up rather than down in ip_clk_freq check
  [media] smiapp: Use 8-bit reads only before identifying the sensor
  [media] smiapp: Quirk for sensors that only do 8-bit reads
  [media] smiapp: Pass struct sensor to register writing commands instead of i2c_client
  [media] smiapp: Allow using external clock from the clock framework
  [media] zl10353: change .read_snr() to report SNR as a 0.1 dB
  [media] media: add support to gspca/pac7302.c for 093a:2627 (Genius FaceCam 300)
  [media] m88rs2000 - only flip bit 2 on reg 0x70 on 16th try
  ...

[media] media: add support to gspca/pac7302.c for 093a:2627 (Genius FaceCam 300)

2012-05-20T15:15:12+00:00

gspca_pac7302 module supports the webcam with usb id: 093a:2627.
It is a Genius FaceCam 300.
The module does not need any changes but listing the usb id along with a vertical flip flag.
The included patch adds this to the module source.

Signed-off-by: Jozsef Marton 
Acked-by: Márton Németh 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l2-dev: rename two functions

2012-05-14T18:06:50+00:00

Rename the function v4l2_dont_use_lock to v4l2_disable_ioctl_locking,
and rename v4l2_dont_use_cmd to v4l2_disable_ioctl.

Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l2-framework.txt: update the core lock documentation

2012-05-14T18:05:55+00:00

Thanks to Laurent Pinchart for pointing out that this information was missing.

Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

[media] V4L: Add helper function for standard integer menu controls

2012-05-14T17:03:21+00:00

This patch adds v4l2_ctrl_new_int_menu() helper function which can be used
in drivers for creating standard integer menu control with driver-specific
menu item list. It is similar to v4l2_ctrl_new_std_menu(), except it doesn't
have a mask parameter and an additional qmenu parameter allows passing
an array of signed 64-bit integers as the menu item list.

Signed-off-by: Sylwester Nawrocki 
Signed-off-by: Kyungmin Park 
Acked-by: Sakari Ailus 
Tested-by: Sakari Ailus 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l2-framework.txt: document v4l2_dont_use_cmd

2012-05-14T12:20:30+00:00

Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l2-dev: make it possible to skip locking for selected ioctls

2012-05-14T12:13:43+00:00

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 
Acked-by: Hans de Goede 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l: Implement v4l2_subdev_link_validate()

2012-05-14T11:45:31+00:00

v4l2_subdev_link_validate() is the default op for validating a link. In V4L2
subdev context, it is used to call a pad op which performs the proper link
check without much extra work.

Signed-off-by: Sakari Ailus 
Acked-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l: Improve sub-device documentation for pad ops

2012-05-14T11:44:52+00:00

Document that format related configuration is done through pad ops in case
the driver does use the media framework.

Signed-off-by: Sakari Ailus 
Acked-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l: Document raw bayer 4CC codes

2012-05-14T11:38:17+00:00

Document guidelines how 4CC codes should be named. Only raw bayer is
included currently. Other formats should be documented later on.

Signed-off-by: Sakari Ailus 
Signed-off-by: Mauro Carvalho Chehab