linux_dsm_epyc7002/drivers/media
Mauro Carvalho Chehab b4600d70c0 [media] dib8000: estimate strength in dBm
Better to have Signal strength in dB.
This takes a very rough estimation for the signal strength,
that was calibrated using a Dektec DTA-2111 Gold RF generator
and a Pixelview dib8076 stick.

It estimates the signal strength using a linear equation where:
	- the max is -22.5 dBm, with returns 55953
	- the min is -35.0 dBm, with returns 50110

With -22dBm, the signal strengh is returned as 65535.
Unfortunately, the min strength generated with DTA-2111 is
-35dBm.

It should be noticed that approximating it by a linear equation
is not right. I should probably be splitting it into 0.5 dB
linear segments, in order to get a higher precision, just like
it is done on mb86a20s, but that would force me to add some
attenuators, in order to get dB levels below -35dBm, which is,
btw, strong enough to get signal lock.

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Acked-by: Patrick Boettcher <pboettcher@kernellabs.com>
2013-12-19 08:17:45 -02:00
..
common [media] media_tree: Fix spelling errors 2013-12-09 14:50:50 -02:00
dvb-core [media] it913x: Add support for Avermedia H335 id 0x0335 2013-12-18 10:27:53 -02:00
dvb-frontends [media] dib8000: estimate strength in dBm 2013-12-19 08:17:45 -02:00
firewire
i2c Merge branch 'upstream-fixes' into patchwork 2013-12-13 05:04:00 -02:00
mmc
parport
pci Merge branch 'upstream-fixes' into patchwork 2013-12-13 05:04:00 -02:00
platform [media] s5p-jpeg: Adjust g_volatile_ctrl callback to Exynos4x12 needs 2013-12-18 11:51:47 -02:00
radio [media] radio-raremono: add support for 'Thanko's Raremono' AM/FM/SW USB device 2013-12-18 11:30:32 -02:00
rc [media] mceusb: Add Hauppauge WinTV-HVR-930C HD 2013-12-10 15:33:52 -02:00
tuners [media] media_tree: Fix spelling errors 2013-12-09 14:50:50 -02:00
usb [media] it913x: Add support for Avermedia H335 id 0x0335 2013-12-18 10:27:53 -02:00
v4l2-core [media] v4l: of: Drop endpoint node reference in v4l2_of_get_remote_port() 2013-12-18 06:26:20 -02:00
Kconfig
Makefile
media-device.c
media-devnode.c
media-entity.c [media] media: Check for active links on pads with MEDIA_PAD_FL_MUST_CONNECT flag 2013-12-04 15:03:45 -02:00