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media: vidtv.rst: update it to better describe the frequencies 

The virtual driver has now a minimal set of frequencies for a
single transponder to be found by each DVB standard.

Document it, and update related information about the
simulated LNBf.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2020-09-15 09:18:32 +02:00
parent 9ec6f4bb60
commit 2cf846b1f3
1 changed files with 11 additions and 3 deletions
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14
Documentation/driver-api/media/drivers/vidtv.rst
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@ -62,6 +62,14 @@ When compiled as a module, run::
That's it! The bridge driver will initialize the tuner and demod drivers as That's it! The bridge driver will initialize the tuner and demod drivers as
part of its own initialization. part of its own initialization.
By default, it will accept the following frequencies:
- 474 MHz for DVB-T/T2/C;
- 11,362 GHz for DVB-S/S2.
For satellite systems, the driver simulates an universal extended
LNBf, with frequencies at Ku-Band, ranging from 10.7 GHz to 12.75 GHz.
You can optionally define some command-line arguments to vidtv. You can optionally define some command-line arguments to vidtv.
Command-line arguments to vidtv Command-line arguments to vidtv
@ -86,13 +94,13 @@ mock_tune_delay_msec
Simulate a tune delay. Default 0. Simulate a tune delay. Default 0.
vidtv_valid_dvb_t_freqs vidtv_valid_dvb_t_freqs
Valid DVB-T frequencies to simulate. Valid DVB-T frequencies to simulate, in Hz.
vidtv_valid_dvb_c_freqs vidtv_valid_dvb_c_freqs
Valid DVB-C frequencies to simulate. Valid DVB-C frequencies to simulate, in Hz.
vidtv_valid_dvb_s_freqs vidtv_valid_dvb_s_freqs
Valid DVB-C frequencies to simulate. Valid DVB-S/S2 frequencies to simulate at Ku-Band, in kHz.
max_frequency_shift_hz, max_frequency_shift_hz,
Maximum shift in HZ allowed when tuning in a channel. Maximum shift in HZ allowed when tuning in a channel.