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path: root/drivers/media/common/tuners/tuner-xc2028.c (follow)
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* [media] common: move media/common/tuners to media/tunersMauro Carvalho Chehab2012-08-141-1509/+0
| | | | | | | Move the tuners one level up, as the "common" directory will be used by drivers that are shared between more than one driver. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] common: tunners: use %*ph to dump small buffersAndy Shevchenko2012-08-131-2/+1
| | | | | Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: add missing else caseHans Petter Selasky2012-08-121-2/+2
| | | | | | | >From 59306435992d9349f10ad82a8adf14d98becbbe8 Mon Sep 17 00:00:00 2001 Signed-off-by: Hans Petter Selasky <hselasky@c2i.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: unlock on error in xc2028_get_afc()Dan Carpenter2012-07-311-1/+1
| | | | | | | We need to do a mutex_unlock(&priv->lock) before returning. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: fix "=" vs "==" typoDan Carpenter2012-07-311-1/+1
| | | | | | | We intended to do a compare here, not an assignment. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: tag the usual firmwares to help dracutMauro Carvalho Chehab2012-07-061-0/+2
| | | | | | | | | When tuner-xc2028 is not compiled as a module, dracut will need to copy the firmware inside the initfs image. So, use MODULE_FIRMWARE() to indicate such need. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner, xc2028: add support for get_afc()Mauro Carvalho Chehab2012-07-041-1/+45
| | | | | | | | | Implement API support to return AFC frequency shift, as this device supports it. The only other driver that implements it is tda9887, and the frequency there is reported in Hz. So, use Hz also for this tuner. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: Fix signal strength reportMauro Carvalho Chehab2012-07-041-9/+16
| | | | | | | | | | | | There are several bugs at the signal strength algorithm: - It is using logical OR, instead of bit OR; - It doesn't wait up to 18 ms as it should; - the strength range is not ok. Rework on it, in order to make it work. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: use request_firmware_nowait()Mauro Carvalho Chehab2012-06-301-49/+129
| | | | | | | | | | | | Change the firmware logic to use request_firmware_nowait(), and to preserve the loaded firmwares in memory, to reduce the risk of troubles with buggy userspace apps. With this change, while the firmware is being loaded, the driver will return -EAGAIN to any calls. If, for some reason, firmware failed to be loaded from userspace, it will return -ENODEV. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] Add registers names to XC2028 tuner from datahseet and use themMiroslav Slugen2012-01-161-6/+21
| | | | | Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] xc3028: fix center frequency calculation for DTV78 firmwareGianluca Gennari2012-01-061-10/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch replaces the previous one proposed in the thread "xc3028: force reload of DTV7 firmware in VHF band with Zarlink demodulator", at the linux-media@vger.kernel.org ML. The problem is that the firmware DTV78 works fine in UHF band (8 MHz bandwidth) but is not working at all in VHF band (7 MHz bandwidth). Reading the comments inside the code, I figured out that the real problem could be connected to the formula used to calculate the center frequency offset in VHF band. In fact, removing this adjustment fixes the problem: if ((priv->cur_fw.type & DTV78) && freq < 470000000) offset -= 500000; This is coherent to what was implemented for the DTV7 firmware by an Australian user: if (priv->cur_fw.type & DTV7) offset += 500000; In the end, now the center frequency is the same for all firmwares (DTV7, DTV8, DTV78) and doesn't depend on channel bandwidth. The final code looks clean and simple, and there is no need for any "magic" adjustment: if (priv->cur_fw.type & DTV6) offset = 1750000; else /* DTV7 or DTV8 or DTV78 */ offset = 2750000; Signed-off-by: Gianluca Gennari <gennarone@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuners: remove dvb_frontend_parameters from set_params()Mauro Carvalho Chehab2011-12-311-2/+1
| | | | | | | | | | | This is a big patch, yet trivial: now that all tuners use the DVBv5 way to pass parameters (e. g. via fe->dtv_property_cache), the extra parameter can be removed from set_params() call. After this change, very few DVBv3 specific stuff are left at the tuners. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: use DVBv5 parameters on set_params()Mauro Carvalho Chehab2011-12-311-47/+36
| | | | | | | Instead of using DVBv3 parameters, rely on DVBv5 parameters to set the tuner. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] xc4000: Use kcalloc instead of kzalloc to allocate arrayThomas Meyer2011-12-301-1/+1
| | | | | | | | | | | | The advantage of kcalloc is, that will prevent integer overflows which could result from the multiplication of number of elements and size and it is also a bit nicer to read. The semantic patch that makes this change is available in https://lkml.org/lkml/2011/11/25/107 Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: Better report signal strengthMauro Carvalho Chehab2011-11-301-1/+1
| | | | | | | Fix lock bit to better indicate signal strength, from 4096 to 65535. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner/xc2028: Fix frequency offset for radio modeMauro Carvalho Chehab2011-08-311-3/+8
| | | | | | | | | | | In radio mode, no frequency offset should be used. Instead of taking Thierry's patch that creates a separate function to calculate the digital offset, it seemed better to just keep everything at the same place. Reported-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner/xc2028: Add I2C flush callbackThierry Reding2011-08-311-0/+7
| | | | | | | | | | | | | When loading the firmware, complete each chunk by sending an I2C flush command to the frontend. Some devices like the tm6000 seem to require this to properly flush the I2C buffers. The current code in tm6000 executes the flush command once after each I2C transfer, which slows down the firmware loading especially when loading large BASE type images. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028.c: fix compile warningHans Verkuil2011-03-221-2/+2
| | | | | | | | | | drivers/media/common/tuners/tuner-xc2028.c: In function 'generic_set_freq': drivers/media/common/tuners/tuner-xc2028.c:936:15: warning: comparison between 'enum tuner_mode' and 'enum v4l2_tuner_type' Argument type was enum tuner_mode, but should have been enum v4l2_tuner_type. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner: Remove remaining usages of T_DIGITAL_TVMauro Carvalho Chehab2011-03-221-4/+4
| | | | | | | A few places used T_DIGITAL_TV internally. Remove the usage of this obsolete mode mask. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] tuner-xc2028: More firmware loading retriesAlina Friedrichsen2011-03-221-3/+3
| | | | | | | My Hauppauge WinTV HVR-1400 needs sometimes more then only one retry to load the firmware successfully. Signed-off-by: Alina Friedrichsen <x-alina@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: xc3028: fix regression in firmware loading timeDevin Heitmueller2010-05-181-4/+7
| | | | | | | | | | | | | Fix a regression in the firmware loading time where it went from 1080 ms to 4700 ms. This was noticed when the em28xx based HVR-950 took noticably longer to load the driver. Regression introduced in hg 12824. The developer added an msleep() call with an argument based on a newly introduced xc3028_ctrl field, which is left initialized to zero for pretty much every board that is currently supported. Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12846): tuner-xc2028: Fix skip code for devices with broken read ↵Mauro Carvalho Chehab2010-05-181-0/+5
| | | | | | (tm6000) Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12825): tm6000: I2C reading operations is not reliable on tm6000Mauro Carvalho Chehab2010-05-181-2/+8
| | | | | | | | | | tm6000 sometimes can't read from i2c, but this is currently required for tuner-xc2028 to work. This patch adds an option to tuner-xc2028 to not rely on i2c reading. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12824): tuner-xc2028: adds an option to send i2c data on slower speedMauro Carvalho Chehab2010-05-181-1/+4
| | | | Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* V4L/DVB: tuner-xc2028: Fix demod breakage for XC3028LMauro Carvalho Chehab2010-02-261-1/+3
| | | | | | | | | A small mistake on the last patch broke demod s-code setup for XC3028L (firmware 3.2 and upper). Fix it. Thanks-to: Stefan Ringel <stefan.ringel@arcor.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: tuner-xc2028: fix tuning logic to solve a regression in AustraliaMauro Carvalho Chehab2010-02-261-17/+60
| | | | | | | | | | | | There's one reported regression in Australia (DTV7) and some reported troubles with newer firmwares found on xc3028l chips. Rework the logic to improve tuner on those cases. Thanks-to: Robert Lowery <rglowery@exemail.com.au> Thanks-to: Stefan Ringel <stefan.ringel@arcor.de> Tested-by: Robert Lowery <rglowery@exemail.com.au> CC: stable.kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12394): cx88: Disable xc3028 power management for Geniatech x8000Devin Heitmueller2009-08-141-2/+2
| | | | | | | | | | | | | | | A user discovered that the Geniatech x8000 encountered a regression when the xc3028 power management was introduced. The xc3028 never recovers after setting the powerdown register, which is probably because the xc3028 reset GPIO is not properly configured. Since I do not have access to the hardware and thus cannot determine the correct GPIO configuration, just disable xc3028 power management on this board, which fixes the regression. Thanks to user "ritec" for reporting the issue and testing the fix. Cc: rictec <rictec@netcabo.pt> Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12167): tuner-xc2028: Fix 7 MHz DVB-TAndy Walls2009-07-051-1/+12
| | | | | | | | | | The following patch should fix 7 MHz DVB-T with the XC3028 using the DTV7 firmware from the xc3028-v27.fw firmware image. Tested-by: Terry Wu <terrywu2009@gmail.com> [mchehab@redhat.com: thanks to John Ferlito, we have a real test in Australia] Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* Merge branch 'for_linus' of ↵Linus Torvalds2009-06-171-25/+31
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (425 commits) V4L/DVB (11870): gspca - main: VIDIOC_ENUM_FRAMESIZES ioctl added. V4L/DVB (12004): poll method lose race condition V4L/DVB (11894): flexcop-pci: dmesg visible names broken V4L/DVB (11892): Siano: smsendian - declare function as extern V4L/DVB (11891): Siano: smscore - bind the GPIO SMS protocol V4L/DVB (11890): Siano: smscore - remove redundant code V4L/DVB (11889): Siano: smsdvb - add DVB v3 events V4L/DVB (11888): Siano: smsusb - remove redundant ifdef V4L/DVB (11887): Siano: smscards - add board (target) events V4L/DVB (11886): Siano: smscore - fix some new GPIO definitions names V4L/DVB (11885): Siano: Add new GPIO management interface V4L/DVB (11884): Siano: smssdio - revert to stand alone module V4L/DVB (11883): Siano: cards - add two additional (USB) devices V4L/DVB (11824): Siano: smsusb - change exit func debug msg V4L/DVB (11823): Siano: smsusb - fix typo in module description V4L/DVB (11822): Siano: smscore - bug fix at get_device_mode V4L/DVB (11821): Siano: smscore - fix isdb-t firmware name V4L/DVB (11820): Siano: smscore - fix byte ordering bug V4L/DVB (11819): Siano: smscore - fix get_common_buffer bug V4L/DVB (11818): Siano: smscards - assign gpio to HPG targets ...
| * V4L/DVB (11922): tuner-xc2028: cleanup: better use tuner type definesMauro Carvalho Chehab2009-06-171-2/+2
| | | | | | | | Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (11918): tuner-xc2028: Fix offset frequencies for DVB @ 6MHzMauro Carvalho Chehab2009-06-171-13/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Both ATSC and DVB @ 6MHz bandwidth require the same offset. While we're fixing it, let's cleanup the bandwidth setup to better reflect the fact that it is a function of the bandwidth. Thanks to Terry Wu <terrywu2009@gmail.com> for pointing this issue and to Andy Walls <awalls@radix.net> for an initial patch for this fix. Cc: Terry Wu <terrywu2009@gmail.com> Acked-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (11917): Fix firmware load for DVB-T @ 6MHz bandwidth for xc3028/xc3028LMauro Carvalho Chehab2009-06-171-9/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The only two countries that are known to use 6MHz bandwidth are Taiwan and Uruguay. Both use QAM subcarriers at OFTM. This patch fixes the firmware load for such countries, where the required firmware is the QAM one. This also confirms the previous tests where it was noticed that the 6MHz QAM firmware doesn't work for cable. So, this patch also removes support for DVB-C, instead of just printing a warning. Thanks to Terry Wu <terrywu2009@gmail.com> for pointing this issue and to Andy Walls <awalls@radix.net> for an initial patch for this fix. Cc: Terry Wu <terrywu2009@gmail.com> Acked-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (11800): tuner-xc2028: show the proper module description for ↵Devin Heitmueller2009-06-161-1/+1
| | | | | | | | | | | | | | | | | | | | no_poweroff option There was a typo in the module description for the "no_poweroff" option, where the help was being associated with the "debug" option instead. Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (11723): Link firmware to physical deviceJean Delvare2009-06-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | Use the physical device rather than the i2c adapter as the reference device when loading firmwares. This will prevent the sysfs name collision with i2c-dev that has been reported many times. I may have missed other drivers which need the same fix. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* | firmware: tuners/xc2028: prepare for FIRMWARE_NAME_MAX removalSamuel Ortiz2009-06-161-1/+1
|/ | | | | | | | | | | | We're going to remove the FIRMWARE_NAME_MAX definition in order to avoid any firmware name length restriction. This patch gets rid of the xc2028 FIRMWARE_NAME_MAX reference. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Michel Ludwig <michel.ludwig@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* V4L/DVB (9913): tuner-xc2028: allow printing stack trace as debug on sleep codeMauro Carvalho Chehab2008-12-301-0/+4
| | | | | | | | | tuner-xc3028 can be put to sleep to save power. However, if not properly recovered from sleep, the device won't work. It is noticed that some devices doesn't recover properly, so let's add a dump_stack() as a debug option, to allow us to track when this happens. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9771): tuner-xc2028: fix a small warningMauro Carvalho Chehab2008-12-301-1/+1
| | | | | | | /home/mauro/v4l-dvb/v4l/tuner-xc2028.c: In function 'xc2028_sleep': /home/mauro/v4l-dvb/v4l/tuner-xc2028.c:1111: warning: 'return' with no value, in function returning non-void Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9769): tuner-xc2028: powers device of when not usedMauro Carvalho Chehab2008-12-301-0/+31
| | | | | | | | Since the firmware load is now fast on most boards, better to keep the tuner off by default. A modprobe parameter were added to keep the old behavior, to be used by old devices. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9055): tuner-xc2028: Do a better job selecting firmware typeMauro Carvalho Chehab2008-10-121-9/+24
| | | | | | | | | | Firmware selection is very tricky on this device. This patch do a better selection of the proper firmware type, by using a code to hint if the firmware to be loaded should be D2620 or D2633. It also allows overriding the hint at the control structure. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9049): convert tuner drivers to use dvb_frontend->callbackMichael Krufky2008-10-121-20/+21
| | | | | Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8136): xc2028 unaligned access fixesAl Viro2008-07-201-11/+14
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* tuners: treat firmware data as constDavid Woodhouse2008-07-101-1/+1
| | | | Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* V4L/DVB (7944): tuner-xc2028: use hybrid_tuner_request_stateMichael Krufky2008-06-051-46/+41
| | | | | | | Use a standard method to manage multiple instances of a hybrid tuner. Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB(7767): Move tuners to common/tunersMauro Carvalho Chehab2008-04-291-0/+1227
There were several issues in the past, caused by the hybrid tuner design, since now, the same tuner can be used by drivers/media/dvb and drivers/media/video. Kconfig items were rearranged, to split V4L/DVB core from their drivers. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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