linux-toradex.git/include/media, branch v2.6.36.4

Don't export format_by_forcc on two different drivers

2011-01-07T21:58:54+00:00

commit a757ee2216211278680dd8ac869aabe7b4a9970d upstream.

Drivers should append their name on exported symbols, to avoid
conflicts with allyesconfig:

drivers/staging/built-in.o: In function `format_by_fourcc':
/home/v4l/work_trees/linus/drivers/staging/cx25821/cx25821-video.c:96: multiple definition of `format_by_fourcc'
drivers/media/built-in.o:/home/v4l/work_trees/linus/drivers/media/common/saa7146_video.c:88: first defined here

Let's rename both occurences with a small shellscript:

for i in drivers/staging/cx25821/*.[ch]; do sed s,format_by_fourcc,cx25821_format_by_fourcc,g <$i >a && mv a $i; done
for i in drivers/media/common/saa7146*.[ch]; do sed s,format_by_fourcc,saa7146_format_by_fourcc,g <$i >a && mv a $i; done
for i in include/media/saa7146*.[ch]; do sed s,format_by_fourcc,saa7146_format_by_fourcc,g <$i >a && mv a $i; done

Signed-off-by: Mauro Carvalho Chehab 
Signed-off-by: Greg Kroah-Hartman

V4L/DVB: videobuf-dma-sg: set correct size in last sg element

2010-09-28T01:22:01+00:00

This fixes a nasty memory corruption bug when using userptr I/O.
The function videobuf_pages_to_sg() sets up the scatter-gather list for the
DMA transfer to the userspace pages. The first transfer is setup correctly
(the size is set to PAGE_SIZE - offset), but all other transfers have size
PAGE_SIZE. This is wrong for the last transfer which may be less than PAGE_SIZE.

Most, if not all, drivers will program the boards DMA engine correctly, i.e.
even though the size in the last sg element is wrong, they will do their
own size calculations and make sure the right amount is DMA-ed, and so seemingly
prevent memory corruption.

However, behind the scenes the dynamic DMA mapping support (in lib/swiotlb.c)
may create bounce buffers if the memory pages are not in DMA-able memory.
This happens for example on a 64-bit linux with a board that only supports
32-bit DMA.

These bounce buffers DO use the information in the sg list to determine the
size. So while the DMA engine transfers the correct amount of data, when the
data is 'bounced' back too much is copied, causing buffer overwrites.

The fix is simple: calculate and set the correct size for the last sg list
element.

Signed-off-by: Hans Verkuil 
Cc: stable@kernel.org
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB: cx2341x: convert to the control framework

2010-08-09T02:43:05+00:00

Since this module is also used by drivers that are not yet converted, the old
and new code have to co-exist.

The source is split into three parts: a common part at the top, which is used
by both old and new code, then the old code followed by the new control
framework implementation. This new code is much more readable (and shorter!)
than the original code.

Once all bridge drivers that use this are converted the old code can be
deleted.

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

V4L/DVB: cx25840/ivtv: replace ugly priv control with s_config

2010-08-09T02:43:05+00:00

The cx25840 used a private control CX25840_CID_ENABLE_PVR150_WORKAROUND
to be told whether to enable a workaround for certain pvr150 cards.

This is really config data that it needs to get at load time.

Implemented this in cx25840 and ivtv.

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

V4L/DVB: v4l2: Add new control handling framework

2010-08-09T02:43:03+00:00

Add a new framework to handle controls which makes life for driver
developers much easier.

Note that this patch moves some of the control support that used to be in
v4l2-common.c to v4l2-ctrls.c. The tables were copied unchanged. The body
of v4l2_ctrl_query_fill() was copied to a new v4l2_ctrl_fill() function
in v4l2-ctrls.c. This new function doesn't use the v4l2_queryctrl
struct anymore, which makes it more general.

The remainder of v4l2-ctrls.c is all new. Highlights include:

- No need to implement VIDIOC_QUERYCTRL, QUERYMENU, S_CTRL, G_CTRL,
  S_EXT_CTRLS, G_EXT_CTRLS or TRY_EXT_CTRLS in either bridge drivers
  or subdevs. New wrapper functions are provided that can just be plugged in.
  Once everything has been converted these wrapper functions can be removed as well.

- When subdevices are added their controls can be automatically merged
  with the bridge driver's controls.

- Most drivers just need to implement s_ctrl to set the controls.
  The framework handles the locking and tries to be as 'atomic' as possible.

- Ready for the subdev device nodes: the same mechanism applies to subdevs
  and their device nodes as well. Sub-device drivers can make controls
  local, preventing them from being merged with bridge drivers.

- Takes care of backwards compatibility handling of VIDIOC_S_CTRL and
  VIDIOC_G_CTRL. Handling of V4L2_CID_PRIVATE_BASE is fully transparent.
  CTRL_CLASS controls are automatically added.

Signed-off-by: Hans Verkuil 
Reviewed-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB: IR: extend interfaces to support more device settings

2010-08-09T02:43:00+00:00

LIRC: add new IOCTL that enables learning mode (wide band receiver)
Still missing features: carrier report & timeout reports.
Will need to pack these into ir_raw_event

Signed-off-by: Maxim Levitsky 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB: IR: add helper function for hardware with small o/b buffer

2010-08-09T02:43:00+00:00

Some ir input devices have small buffer, and interrupt the host
each time it is full (or half full)

Add a helper that automaticly handles timeouts, and also
automaticly merges samples of same time (space-space)
Such samples might be placed by hardware because size of
sample in the buffer is small (a byte for example).

Also remove constness from ir_dev_props, because it now contains timeout
settings that driver might want to change

Signed-off-by: Maxim Levitsky 
Acked-by: Jarod Wilson 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB: IR: Allow not to compile keymaps in

2010-08-09T02:43:00+00:00

Currently, ir device registration fails if keymap requested by driver is not found.
Fix that by always compiling in the empty keymap, and using it as a failback.

Signed-off-by: Maxim Levitsky 
Acked-by: Jarod Wilson 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB: staging/lirc: port lirc_streamzap to ir-core

2010-08-09T02:42:58+00:00

This ports lirc_streamzap.c over to ir-core in-place, to be followed by
a patch moving the driver over to drivers/media/IR/streamzap.c and
enabling the proper Kconfig bits.

Presently, the in-kernel keymap doesn't work, as the stock Streamzap
remote uses an RC-5-like, but not-quite-RC-5 protocol, which the
in-kernel RC-5 decoder doesn't cope with. The remote can be used right
now with the lirc bridge driver though, and other remotes (at least an
RC-6(A) MCE remote) work perfectly with the driver.

I'll take a look at making the existing RC-5 decoder cope with this odd
duck, possibly implement another standalone decoder engine, or just
throw up my hands and say "meh, use lirc"... But the driver itself
should be perfectly sound.

Remaining items on the streamzap TODO list:
- add LIRC_SET_REC_TIMEOUT-alike support
- add LIRC_GET_M{AX,IN}_TIMEOUT-alike support
- add LIRC_GET_REC_RESOLUTION-alike support

All of the above should be trivial to add. There are patches pending to
add this support to ir-core from Maxim Levitsky, and I'll take care of
these once his patches get integrated. None of them are currently
essential though.

Signed-off-by: Jarod Wilson 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB: v4l2_subdev: Get rid of now unused IR pulse width defines

2010-08-09T02:42:57+00:00

Signed-off-by: Andy Walls 
Signed-off-by: Mauro Carvalho Chehab