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path: root/drivers/media/dvb/frontends
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2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-22[media] STV0288 added full frontend statusMalcolm Priestley
status now returns FE_HAS_CARRIER FE_HAS_SIGNAL FE_HAS_VITERBI Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-22[media] stv0367: typo in function parameterDan Carpenter
The CellsCoeffs arrays are [3][6][5] not [2][6][5]. Signed-off-by: Dan Carpenter <error27@gmail.com> Cc: Igor M. Liplianin <liplianin@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-22[media] stv0367: signedness bug in stv0367_get_tuner_freq()Dan Carpenter
We use err to store negative error codes so it should be signed. And if we return an error from stv0367_get_tuner_freq() that needs to be handled properly as well. (param->frequency is a u32). Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-22[media] Zarlink zl10036 DVB-S: Fix mem leak in zl10036_attachJesper Juhl
On Thu, 17 Feb 2011, Matthias Schwarzott wrote: > On Sunday 06 February 2011, Jesper Juhl wrote: > > If the memory allocation to 'state' succeeds but we jump to the 'error' > > label before 'state' is assigned to fe->tuner_priv, then the call to > > 'zl10036_release(fe)' at the 'error:' label will not free 'state', but > > only what was previously assigned to 'tuner_priv', thus leaking the memory > > allocated to 'state'. > > There are may ways to fix this, including assigning the allocated memory > > directly to 'fe->tuner_priv', but I did not go for that since the > > additional pointer derefs are more expensive than the local variable, so I > > just added a 'kfree(state)' call. I guess the call to 'zl10036_release' > > might not even be needed in this case, but I wasn't sure, so I left it in. > > > Yeah, that call to zl10036_release can be completely eleminated. > Another thing is: jumping to the error label only makes sense when memory was > already allocated. So the jump in line 471 can be replaced by "return NULL", > as the other error handling before allocation: > if (NULL == config) { > printk(KERN_ERR "%s: no config specified", __func__); > goto error; > } > > I suggest to improve the patch to clean the code up when changing that. > > But I am fine with commiting this patch also if you do not want to change it. > Thank you for your feedback. It makes a lot of sense. Changing it is not a problem :) How about the updated patch below? If the memory allocation to 'state' succeeds but we jump to the 'error' label before 'state' is assigned to fe->tuner_priv, then the call to 'zl10036_release(fe)' at the 'error:' label will not free 'state', but only what was previously assigned to 'tuner_priv', thus leaking the memory allocated to 'state'. This patch fixes the leak and also does not jump to 'error:' before mem has been allocated but instead just returns. Also some small style cleanups. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Matthias Schwarzott <zzam@gentoo.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-22[media] af9013: reimplement firmware downloadAntti Palosaari
Split FW download packages smarter way and bug free. Implementation is based of Andrea Merello's example he provided for tda18218 driver. Count remaining FW bytes down in loop instead of division and modulo combination used earlier. Thanks to: Andrea Merello <andrea.merello@gmail.com> Signed-off-by: Antti Palosaari <crope@iki.fi> Cc: Andrea Merello <andrea.merello@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-22[media] af9013: download FW earlier in attach()Antti Palosaari
Quick test shows that FW must be running before other checks so make it happen earlier. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-22[media] stv0367: implement uncorrected blocks counterAbylay Ospan
Signed-off-by: Abylay Ospan <aospan@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-22[media] stv0367: change default value for AGC registerAbylay Ospan
Signed-off-by: Abylay Ospan <aospan@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-22[media] stv0367.c: fix compiler warningHans Verkuil
drivers/media/dvb/frontends/stv0367.c: In function 'stv0367ter_lock_algo': drivers/media/dvb/frontends/stv0367.c:1315:2: warning: cast from pointer to integer of different size Use %p to print addresses instead of 0x%x. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: wrong hardware tune function implementedIgor M. Liplianin
It is taken from another tree, where it is modified. Patch to fix that Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv0900: Update status when LOCK is missedAbylay Ospan
Signed-off-by: Abylay Ospan <aospan@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv0900: speed up DVB-S searchingIgor M. Liplianin
Simptoms: After zapping DVB-S2 channel searching for DVB-S tooks long time. Now it takes less than a second. Signed-off-by: Igor M. Liplianin <liplianin@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] dib9000: fix return type in dib9000_mbx_send_attr()Dan Carpenter
dib9000_mbx_send_attr() returns an int. It doesn't work to save negative error codes in an unsigned char, so I've made "ret" an int type. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] dib8000: fix small memory leak on errorDan Carpenter
kfree(state) if fe allocation fails. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv090x: handle allocation failuresDan Carpenter
kmalloc() can fail so check whether state->internal is NULL. append_internal() can return NULL on allocation failures so check that. Also if we hit the error condition later in the function then there is a memory leak and we need to call remove_dev() to fix it. Also Oliver Endriss pointed out an additional leak that I missed in the first version of this patch. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Oliver Endriss <o.endriss@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] cx88: add support for TeVii S464 PCI cardIgor M. Liplianin
The card uses ds3000 demod from Montage. Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: hardware tune algorithmIgor M. Liplianin
Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: add carrier offset calculationIgor M. Liplianin
Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: remove unnecessary dnxt, dcur structuresIgor M. Liplianin
All necessary parameters already stored in frontend cache. Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: clean up in tune procedureIgor M. Liplianin
Variable 'retune' does not make sense. Loop is not needed for only one try. Remove unnecessary dprintk's. Remove a lot of debug messages and delays. Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] dw2102: Prof 7500: Lock LED implementedIgor M. Liplianin
Code changed for dw2102, stv0900 in order to achieve that. Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] dw2102: add support for Geniatech SU3000 USB DVB-S2 cardIgor M. Liplianin
The card uses ds3000 demod from Montage. Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] dvb_pll: DVB-S incorrect tune settings for dw2102/dm1105/cx88/opera1Malcolm Priestley
This tuner PLL has missing initialisation settings resulting in haphazard tuning. The PLL LPF was set to just 22000 symbol rate. Basically, the module is a Sharp BS2F7HZ0194 (STV0299+IX2410) I have had problems implementing the PLL in a new driver and did not want to break the IX2410 out of the PLL. This applies to DW2102, DM1105, CX88 and OPERA1 drivers. Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: don't load firmware during demod initIgor M. Liplianin
Speed up tuning, as firmware is not necessary to load every attempt to tune Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: loading firmware in bigger chunksIgor M. Liplianin
Decrease firmware loading time. Before it is ~4000 i2c calls, now it is ~256 i2c calls to load ds3000 firmware. Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: decrease mpeg clock outputIgor M. Liplianin
TeVii s480 works fine with that on DVB-S2 channels Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] ds3000: fill in demod init functionIgor M. Liplianin
Make some initializations in init, not in tune function Signed-off-by: Igor M. Liplianin <liplianin@me.by> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] Initial commit to support NetUP Dual DVB-T/C CI RF cardIgor M. Liplianin
The card based on cx23885 PCI-e brige. Altera FPGA for CI, multistandard demods stv0367 from STM for QAM & OFDM, Xcieve xc5000 tuners and additional cx25840 for second analog input. Signed-off-by: Igor M. Liplianin <liplianin@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] Support for stv0367 multi-standard demodulatorIgor M. Liplianin
The STV0367 is a multi-standard demodulator which is capable of processing DVB-T as well as DVB-C signals. It is fully compliant with DVB-T and DVB-C recommendations for broadcast services. Signed-off-by: Igor M. Liplianin <liplianin@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv090x: 22kHz workaround must also be performed for the 2nd frontendOliver Endriss
22kHz workaround must also be performed for the 2nd frontend. Signed-off-by: Oliver Endriss <o.endriss@gmx.de> Signed-off-by: Manu Abraham <manu@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv090x: Fix losing lock in dual DVB-S2 modeOliver Endriss
Do not clear registers ACLC/BCLC in DVB-S2 mode for Cut <= 20. Otherwise, the demod could lose the lock periodically. Verified with cineS2 and Duoflex. Signed-off-by: Oliver Endriss <o.endriss@gmx.de> Signed-off-by: Manu Abraham <manu@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv090x: Fixed typos in register macrosOliver Endriss
Fixed typos in register macros. Signed-off-by: Oliver Endriss <o.endriss@gmx.de> Signed-off-by: Manu Abraham <manu@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv090x: Optional external lock routineOliver Endriss
Card driver may supply its own lock routine now. Signed-off-by: Oliver Endriss <o.endriss@gmx.de> Signed-off-by: Manu Abraham <manu@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv090x: make sleep/wakeup specific to the demod pathAndreas Regel
The STV0900 features two demodulator paths in one chip. Thus it is not possible to use the generic power off function of the chip when sending one of them to standby. The other path will stop working in that case. The sleep function now switches off functionality specific to the demod path. The global stuff is only switched off, when both paths are in sleep mode. The wakeup function always turns on the global functionality and then works specific to the path. Signed-off-by: Andreas Regel <andreas.regel@gmx.de> Signed-off-by: Oliver Endriss <o.endriss@gmx.de> Signed-off-by: Manu Abraham <manu@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] dib8000: Fix some wrong alignmentsMauro Carvalho Chehab
Something went wrong with the alignments for the if clause at line 2113. Instead of using one tab for alignments, it used 3 tabs, plus one space character. WARNING: suspect code indent for conditional statements (8, 33) + if ((state->fe[0]->dtv_property_cache.delivery_system != SYS_ISDBT) || [...] + int i = 80000; WARNING: suspect code indent for conditional statements (33, 41) + for (index_frontend = 0; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) { + dib8000_set_bandwidth(state->fe[index_frontend], fe->dtv_property_cache.bandwidth_hz / 1000); WARNING: suspect code indent for conditional statements (33, 41) + do { + msleep(20); WARNING: suspect code indent for conditional statements (41, 49) + for (index_frontend = 0; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) { + if (((tune_failed >> index_frontend) & 0x1) == 0) { WARNING: suspect code indent for conditional statements (49, 57) + if (((tune_failed >> index_frontend) & 0x1) == 0) { + found = dib8000_autosearch_irq(state->fe[index_frontend]); WARNING: suspect code indent for conditional statements (41, 49) + if ((nbr_pending == 0) && (exit_condition == 0)) + exit_condition = 1; Cc: Patrick Boettcher <pboettcher@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] dib7000p: Fix 4-byte wrong alignments for some case statementsMauro Carvalho Chehab
ERROR: switch and case should be at the same indent switch (ch->u.ofdm.transmission_mode) { [...] + case TRANSMISSION_MODE_4K: WARNING: please, no spaces at the start of a line + case TRANSMISSION_MODE_4K:$ ERROR: switch and case should be at the same indent switch (ch->u.ofdm.transmission_mode) { [...] + case TRANSMISSION_MODE_4K: WARNING: please, no spaces at the start of a line + case TRANSMISSION_MODE_4K:$ ERROR: switch and case should be at the same indent switch (ch->u.ofdm.transmission_mode) { [...] + case TRANSMISSION_MODE_4K: WARNING: please, no spaces at the start of a line + case TRANSMISSION_MODE_4K:$ Cc: Patrick Boettcher <pboettcher@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] DiBxxxx: Codingstype updatesOlivier Grenie
This patchs fix several conding-style violations. Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] DiB7090: add support for the dib7090 basedOlivier Grenie
This patch adds support for the SoC DiB7090 DVB-T demodulator and its melt-in UHF/VHF RF tuner. Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] DIB9000: initial support addedOlivier Grenie
This patchs add initial support for the DiB9000-device. This demodulator is firmware-driven. Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] DiB0090: misc improvementsOlivier Grenie
This patch adds several performance improvements and prepares the usage of firmware-based devices. Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] DiBx000: add addition i2c-interface namesOlivier Grenie
This patch adds the possibitity to use different I2C-ports to talk to slave-devices than the standard ones. Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] DiB8000: add diversity supportOlivier Grenie
This patch adds a set a functions which allow the handling of multiple demodulator in a diversity reception chain. Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv090x: add tei-field to config-structurePatrick Boettcher
Some backends want to receive the full transport stream including uncorrected packets. To have that feature this patchs add a field to the config-structure called TEI (transport stream error indicator). Cc: Manu Abraham <abraham.manu@gmail.com> Signed-off-by: Martin Wilks <m.wilks@technisat.com> Signed-off-by: Patrick Boettcher <pboettcher@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-21[media] stv090x: added function to control GPIOs from the outsidePatrick Boettcher
This patch STV090X adds and exports a function to control the GPIOs of the stv090x-devices. Cc: Manu Abraham <abraham.manu@gmail.com> Signed-off-by: Martin Wilks <m.wilks@technisat.com> Signed-off-by: Patrick Boettcher <pboettcher@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-02[media] DiB7000M: add pid filteringOlivier Grenie
This patch adds the pid filtering for the dib7000M demod. It also corrects the pid filtering for the dib7700 based board. It should prevent an oops, when using dib7700p based board. References: https://bugzilla.novell.com/show_bug.cgi?id=644807 Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr> Tested-by: Pavel SKARKA <paul.sp@seznam.cz> Cc: stable@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-01-21Merge branch 'media_fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (101 commits) [media] staging/lirc: fix mem leaks and ptr err usage [media] hdpvr: reduce latency of i2c read/write w/recycled buffer [media] hdpvr: enable IR part [media] rc/mceusb: timeout should be in ns, not us [media] v4l2-device: fix 'use-after-freed' oops [media] v4l2-dev: don't memset video_device.dev [media] zoran: use video_device_alloc instead of kmalloc [media] w9966: zero device state after a detach [media] v4l: Fix a use-before-set in the control framework [media] v4l: Include linux/videodev2.h in media/v4l2-ctrls.h [media] DocBook/v4l: update V4L2 revision and update copyright years [media] DocBook/v4l: fix validation error in dev-rds.xml [media] v4l2-ctrls: queryctrl shouldn't attempt to replace V4L2_CID_PRIVATE_BASE IDs [media] v4l2-ctrls: fix missing 'read-only' check [media] pvrusb2: Provide more information about IR units to lirc_zilog and ir-kbd-i2c [media] ir-kbd-i2c: Add back defaults setting for Zilog Z8's at addr 0x71 [media] lirc_zilog: Update TODO.lirc_zilog [media] lirc_zilog: Add Andy Walls to copyright notice and authors list [media] lirc_zilog: Remove useless struct i2c_driver.command function [media] lirc_zilog: Remove unneeded tests for existence of the IR Tx function ...
2011-01-20kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERTDavid Rientjes
The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option is used to configure any non-standard kernel with a much larger scope than only small devices. This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes references to the option throughout the kernel. A new CONFIG_EMBEDDED option is added that automatically selects CONFIG_EXPERT when enabled and can be used in the future to isolate options that should only be considered for embedded systems (RISC architectures, SLOB, etc). Calling the option "EXPERT" more accurately represents its intention: only expert users who understand the impact of the configuration changes they are making should enable it. Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: David Woodhouse <david.woodhouse@intel.com> Signed-off-by: David Rientjes <rientjes@google.com> Cc: Greg KH <gregkh@suse.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jens Axboe <axboe@kernel.dk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Robin Holt <holt@sgi.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-19[media] frontends/ix2505v: Remember to free allocated memory in failure pathJesper Juhl
We may leak the storage allocated to 'state' in drivers/media/dvb/frontends/ix2505v.c::ix2505v_attach() on error, as it is too early to be able to call ix2505v_release(). This patch makes sure we free the allocated memory in the failure case. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-01-19[media] mb86a20s: Be sure that device is initialized before starting DVBMauro Carvalho Chehab
Due to a hard to track bug between tda829x/tda18271/saa7134, tda829x wants to go to analog mode during DVB initialization, causing some I2C errors. The analog failure doesn't cause any harm, as the device were already properly initialized in analog mode. However, the failure at the digital mode causes the frontend mb86a20s to not initialize. Fortunately, at least on my tests, it was possible to detect that the device is a mb86a20s before the failure. What happens is that tda8290 is a very bad boy: during DVB setup, it keeps insisting to call tda18271 analog_set_params, that calls tune_agc code. The tune_agc code calls saa7134 driver, changing the value of GPIO 27, switching from digital to analog mode and disabling the access to mb86a20s, as, on Kworld SBTVD, the same GPIO used to switch the hardware AGC mode seems to be used to enable the I2C switch that allows access to the frontend (mb86a20s). So, a call to analog_set_params ultimately disables the access to the frontend, and causes a failure at the init frontend logic. This patch is a workaround for this issue: it simply checks if the frontend init had any failure. If so, it will init the frontend when some DTV application will try to set DVB mode. Even being a hack for Kworld SBTVD to work, and assumning that we could teach tda8290 to be a good boy, this is actually an improvement at the frontend driver, as it will be more reliable to initialization failures. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>