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cf845297d5
linux/drivers
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Mauro Carvalho Chehab cf845297d5 [media] tda18271c2dd: Fix saw filter configuration for DVB-C @6MHz 
Currently, the driver assumes that all QAM carriers are spaced with
8MHz. This is wrong, and may decrease QoS on Countries like Brazil,
that have DVB-C carriers with 6MHz-spaced.

Fortunately, both ITU-T J-83 and EN 300 429 specifies a way to
associate the symbol rate with the bandwidth needed for it.

For ITU-T J-83 2007 annex A, the maximum symbol rate for 6 MHz is:
	6 MHz / 1.15 = 5217391 Bauds
For  ITU-T J-83 2007 annex C, the maximum symbol rate for 6 MHz is:
	6 MHz / 1.13 = 5309735 Bauds.

As this tuner is currently used only for DRX-K, and it is currently
hard-coded to annex A, I've opted to use the roll-off factor of 0.15,
instead of 0.13.

If we ever support annex C, the better would be to add a DVB S2API
call to allow changing between Annex A and C, and add the 0.13 roll-off
factor to it.

This code is currently being used on other frontends, so I think we
should later add a core function with this code, to warrant that
it will be properly implemented everywhere.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-07-28 17:09:46 -03:00
..
accessibility
acpi Merge branches 'd3cold', 'bugzilla-37412' and 'bugzilla-38152' into release 2011-07-14 00:16:38 -04:00
amba
ata ahci: change 'masking port_map' printk to KERN_WARNING level 2011-06-29 10:10:07 -07:00
atm
auxdisplay
base mm: Move definition of MIN_MEMORY_BLOCK_SIZE to a header 2011-07-12 11:08:01 +10:00
bcma
block Merge branch 'for-3.0-important' of git://git.drbd.org/linux-2.6-drbd into for-linus 2011-06-30 10:10:50 +02:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into for-davem 2011-06-17 12:40:36 -04:00
cdrom block: fix mismerge of the DISK_EVENT_MEDIA_CHANGE removal 2011-06-02 05:29:19 +09:00
char agp/intel: Fix typo in G4x_GMCH_SIZE_VT_2M 2011-07-13 07:44:27 +01:00
clk
clocksource Revert "clocksource: sh_cmt: Runtime PM support" 2011-05-31 15:26:42 +09:00
connector Connector: Correctly set the error code in case of success when dispatching receive callbacks 2011-06-07 12:02:00 -07:00
cpufreq [CPUFREQ] fix cpumask memory leak in acpi-cpufreq on cpu hotplug. 2011-07-10 17:03:04 -04:00
cpuidle Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2011-05-29 11:18:09 -07:00
crypto crypto: caam - fix operator precedence in shared descriptor allocation 2011-06-30 07:43:27 +08:00
dca
dio
dma dmaengine: shdma: SH_DMAC_MAX_CHANNELS message fix 2011-06-14 15:03:07 +09:00
edac edac,rcu: use synchronize_rcu() instead of call_rcu()+rcu_barrier() 2011-05-26 17:12:37 -07:00
eisa
firewire firewire: ohci: do not bind to Pinnacle cards, avert panic 2011-07-10 12:53:27 +02:00
firmware Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-06-28 11:15:36 -07:00
gpio gpio: wm831x: add a missing break in wm831x_gpio_dbg_show 2011-07-15 14:03:30 -06:00
gpu Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6 2011-07-21 11:07:18 -07:00
hid HID: hid-multitouch: add support for a new Lumio dual-touch panel 2011-06-24 13:41:11 +02:00
hwmon hwmon: (max1111) Fix race condition causing NULL pointer exception 2011-07-17 18:39:19 +02:00
hwspinlock
i2c Merge branch 'for-30-rc5/all-i2c' of git://git.fluff.org/bjdooks/linux 2011-07-07 16:29:29 -07:00
ide ide-cd: signedness warning fix again 2011-06-11 15:06:48 -07:00
idle
ieee802154
infiniband RDMA: Check for NULL mode in .devnode methods 2011-07-04 15:53:28 -07:00
input input: pmic8xxx-pwrkey: Do not use mfd_get_data() 2011-07-05 10:38:43 +02:00
isdn gigaset: call module_put before restart of if_open() 2011-06-17 15:27:32 -04:00
leds drivers/leds/leds-pca9532.c: change driver name to be unique 2011-07-08 21:14:44 -07:00
lguest
macintosh
mca
md md: avoid endless recovery loop when waiting for fail device to complete. 2011-06-28 16:59:42 +10:00
media [media] tda18271c2dd: Fix saw filter configuration for DVB-C @6MHz 2011-07-28 17:09:46 -03:00
memstick
message
mfd [media] radio-timb: Simplified platform data 2011-07-27 17:53:07 -03:00
misc Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-06-28 11:15:36 -07:00
mmc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc 2011-07-13 16:47:31 -07:00
mtd powerpc/85xx: fix NAND_CMD_READID read bytes number 2011-06-22 06:08:48 -05:00
net pppoe: Must flush connections when MAC address changes too. 2011-07-18 11:48:28 -07:00
nfc
nubus
of
oprofile oprofile: Fix locking dependency in sync_start() 2011-05-31 16:33:34 +02:00
parisc
parport
pci PCI: conditional resource-reallocation through kernel parameter pci=realloc 2011-07-08 15:49:20 -07:00
pcmcia pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting 2011-07-11 14:26:34 +08:00
platform hp-wmi: fix use after free 2011-07-11 09:52:35 -04:00
pnp
power Merge git://git.infradead.org/battery-2.6 2011-05-27 10:12:35 -07:00
pps
ps3
ptp ptp: Fix some locking bugs in ptp_read() 2011-06-01 19:29:10 -07:00
rapidio
regulator regulator: max8997: Fix setting inappropriate value for ramp_delay variable 2011-07-08 19:14:58 +01:00
rtc drivers/rtc/rtc-ds1307.c: add support for RTC device pt7c4338 2011-06-27 18:00:12 -07:00
s390 [S390] qdio: Split SBAL entry flags 2011-06-06 14:14:56 +02:00
sbus
scsi [SCSI] isci: fix checkpatch errors 2011-07-03 14:26:24 -05:00
sfi
sh drivers: sh: resume enabled clocks fix 2011-06-14 15:15:25 +09:00
sn
spi spi/s3c64xx: Bug fix for SPI with different FIFO level 2011-07-06 15:03:08 +09:00
ssb ssb: fix init regression of hostmode PCI core 2011-07-07 13:06:08 -04:00
staging [media] TM6000: alsa: Clean up kernel coding style errors 2011-07-27 17:55:55 -03:00
target tcm_fc: Fix conversion spec warning 2011-06-24 00:09:16 +00:00
tc
telephony
thermal
tty Merge branch 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc 2011-07-04 15:54:18 -07:00
uio
usb [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -03:00
uwb
vhost vhost: support event index 2011-05-30 11:14:15 +09:30
video vesafb: fix memory leak 2011-07-04 16:02:48 +09:00
virtio virtio: add api for delayed callbacks 2011-05-30 11:14:16 +09:30
vlynq
w1 w1: ds1wm: add a reset recovery parameter 2011-07-08 21:14:44 -07:00
watchdog watchdog: hpwdt depends on PCI 2011-07-17 12:40:08 +00:00
xen Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-06-20 09:01:33 -07:00
zorro
Kconfig
Makefile Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00