linux-toradex.git/drivers/media/dvb, branch v3.0.16

dib0700: protect the dib0700 buffer access

2011-11-11T17:36:14+00:00

commit bff469f4167fdabfe15294f375577d7eadbaa1bb upstream.

This patch protects the common buffer access inside the dib0700 in order
to manage concurrent access. This protection is done using mutex.

Cc: Mauro Carvalho Chehab 
Cc: Florian Mickler 
Signed-off-by: Javier Marcet 
Signed-off-by: Olivier Grenie 
Signed-off-by: Patrick Boettcher 
[mchehab@redhat.com: dprint requires 3 arguments. Replaced by dib_info]
Signed-off-by: Mauro Carvalho Chehab 
Signed-off-by: Greg Kroah-Hartman

DiBcom: protect the I2C bufer access

2011-11-11T17:36:14+00:00

commit 79fcce3230b140f7675f8529ee53fe2f9644f902 upstream.

This patch protects the I2C buffer access in order to manage concurrent
access. This protection is done using mutex.
Furthermore, for the dib9000, if a pid filtering command is
received during the tuning, this pid filtering command is delayed to
avoid any concurrent access issue.

Cc: Mauro Carvalho Chehab 
Cc: Florian Mickler 
Signed-off-by: Olivier Grenie 
Signed-off-by: Patrick Boettcher 
Signed-off-by: Mauro Carvalho Chehab 
Signed-off-by: Greg Kroah-Hartman

vp7045: fix buffer setup

2011-10-03T18:40:16+00:00

commit fc61ccd35fd59d5362d37c8bf9c0526c85086c84 upstream.

dvb_usb_device_init calls the frontend_attach method of this driver which
uses vp7045_usb_ob. In order to have a buffer ready in vp7045_usb_op, it has to
be allocated before that happens.

Luckily we can use the whole private data as the buffer as it gets separately
allocated on the heap via kzalloc in dvb_usb_device_init and is thus apt for
use via usb_control_msg.

This fixes a
	BUG: unable to handle kernel paging request at 0000000000001e78

reported by Tino Keitel and diagnosed by Dan Carpenter.

Tested-by: Tino Keitel 
Signed-off-by: Florian Mickler 
Signed-off-by: Mauro Carvalho Chehab 
Signed-off-by: Greg Kroah-Hartman

[media] dvb_frontend: fix race condition in stopping/starting frontend

2011-07-13T22:50:12+00:00

Attached is a patch which addresses a race condition in the DVB core
related to closing/reopening the DVB frontend device in quick
succession.  This is the reason that devices such as the HVR-1300,
HVR-3000, and HVR-4000 have been failing to scan properly under MythTV
and w_scan.

The gory details of the race are described in the patch.

Devin

There is a race condition exhibited when channel scanners such as w_scan and
MythTV quickly close and then reopen the frontend device node.

Under normal conditions, the behavior is as follows:

1.  Application closes the device node
2.  DVB frontend ioctl calls dvb_frontend_release which sets
    fepriv->release_jiffies
3.  DVB frontend thread *eventually* calls dvb_frontend_is_exiting() which
    compares fepriv->release_jiffies, and shuts down the thread if timeout has
    expired
4.  Thread goes away
5.  Application opens frontend device
6.  DVB frontend ioctl() calls ts_bus_ctrl(1)
7.  DVB frontend ioctl() creates new frontend thread, which calls
    dvb_frontend_init(), which has demod driver init() routine setup initial
    register state for demod chip.
8.  Tuning request is issued.

The race occurs when the application in step 5 performs the new open() call
before the frontend thread is shutdown.  In this case the ts_bus_ctrl() call
is made, which strobes the RESET pin on the demodulator, but the
dvb_frontend_init() function never gets called because the frontend thread
hasn't gone away yet.  As a result, the initial register config for the demod
is *never* setup, causing subsequent tuning requests to fail.

If there is time between the close and open (enough for the dvb frontend
thread to be torn down), then in that case the new frontend thread is created
and thus the dvb_frontend_init() function does get called.

The fix is to set the flag which forces reinitialization if we did in fact
call ts_bus_ctrl().

This problem has been seen on the HVR-1300, HVR-3000, and HVR-4000, and is
likely occuring on other designs as well where ts_bus_ctrl() actually strobes
the reset pin on the demodulator.

Note that this patch should supercede any patches submitted for the
1300/3000/4000 which remove the code that removes GPIO code in
cx8802_dvb_advise_acquire(), which have been circulating by users for some
time now...

Canonical tracking this issue in Launchpad 439163:

Thanks to Jon Sayers from Hauppauge and Florent Audebert from Anevia S.A. for
providing hardware to test/debug with.

Signed-off-by: Devin Heitmueller 
Cc: Jon Sayers 
Cc: Florent Audebert 
Signed-off-by: Mauro Carvalho Chehab

[media] anysee: return EOPNOTSUPP for unsupported I2C messages

2011-06-01T11:34:45+00:00

Check I2C messages and return error properly.

Signed-off-by: Antti Palosaari 
Signed-off-by: Mauro Carvalho Chehab

Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6

2011-05-27T17:14:22+00:00

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
  [media] v1.88 DM04/QQBOX Move remote to use rc_core dvb-usb-remote
  [media] Add missing include guard to header file
  [media] Inlined functions should be static
  [media] Remove invalid parameter description
  [media] cpia2: fix warning about invalid trigraph sequence
  [media] s5p-csis: Add missing dependency on PLAT_S5P
  [media] gspca/kinect: wrap gspca_debug with GSPCA_DEBUG
  [media] fintek-cir: new driver for Fintek LPC SuperIO CIR function
  [media] uvcvideo: Connect video devices to media entities
  [media] uvcvideo: Register subdevices for each entity
  [media] uvcvideo: Register a v4l2_device
  [media] add V4L2-PIX-FMT-SRGGB12 & friends to docbook
  [media] Documentation/DocBook: Rename media fops xml files
  [media] Media DocBook: fix validation errors
  [media] wl12xx: g_volatile_ctrl fix: wrong field set
  [media] fix kconfig dependency warning for VIDEO_TIMBERDALE
  [media] dm1105: GPIO handling added, I2C on GPIO added, LNB control through GPIO reworked
  [media] Add support for M-5MOLS 8 Mega Pixel camera ISP

[media] v1.88 DM04/QQBOX Move remote to use rc_core dvb-usb-remote

2011-05-26T00:50:17+00:00

driver to use dvb-usb-remote.
The remote(s) generates 24 bit NEC codes, lme2510 keymaps redefined.

Other minor fixes
fix le warning.
make sure frontend is detached on firmware change.

Signed-off-by: Malcolm Priestley 
Signed-off-by: Mauro Carvalho Chehab

[media] Inlined functions should be static

2011-05-26T00:42:26+00:00

Signed-off-by: Hans Petter Selasky 
Signed-off-by: Mauro Carvalho Chehab

[media] Remove invalid parameter description

2011-05-26T00:42:23+00:00

Signed-off-by: Hans Petter Selasky 
Signed-off-by: Mauro Carvalho Chehab

[media] dm1105: GPIO handling added, I2C on GPIO added, LNB control through GPIO reworked

2011-05-25T10:51:26+00:00

Here is patch for GPIO's handling.
It allows to support I2C on GPIO's and per board LNB control through GPIO's.
Also incuded some support for Hendrik Skarpeid card.
For those, who needs to tweak the driver,
I think it is clear how to change and test GPIO's for LNB and other GPIO related stuff now.

[mchehab@redhat.com: I2C_CLASS_TV_DIGITAL is deprecated. removed to avoid breaking compilation]
Signed-off-by: Igor M. Liplianin 
Signed-off-by: Mauro Carvalho Chehab