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[0/3] media: si2157: fix bandwidth set/get, add DVB-C Annex C

Message ID trinity-597c1df9-5f5a-4de5-9a5f-82b0fc8069c3-1641509290301@3c-app-gmx-bap68 (mailing list archive)
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Series media: si2157: fix bandwidth set/get, add DVB-C Annex C | expand

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Robert Schlabbach Jan. 6, 2022, 10:48 p.m. UTC 
The si2157 driver was recently broken so that trying to tune to channels
with a bandwidth of less than 7MHz always resulted in an error. Getting
the bandwidth after digital tuning has always returned erroneous values.
Furthermore, tune requests for DVB-C Annex C were rejected with -EINVAL,
although it should work with the same settings as for DVB-C Annex A.

The following three patches address all these issues.

With all three patches applied, the driver has been verified with a
Si2157-A30 to successfully:

- accept tune requests for DVB-C Annex A/B/C, DVB-T/T2 and ISDB-T
- receive actual 8MHz DVB-C Annex A, DVB-T and DVB-T2 signals

I do not have any DVB-C Annex B/C nor ISDB-T signals available.

Tested-by: Robert Schlabbach <robert_s@gmx.net>
Signed-off-by: Robert Schlabbach <robert_s@gmx.net>