[ModemManager] Alternating AT and QCDM during port probing?

[Aleksander Morgado <aleksander lanedo com>]

Hi Dan & list,

Would it be a good idea to alternate QCDM port probing along with the AT
port probing?, something like:
 * Try AT command(s)
 * If timeouts, try QCDM
 * If timeouts, try again AT command(s)
 * If timeouts, trya gain QCDM
 * If timeouts, try again AT command(s)
 * If timeouts, failed probing.

In this way, QCDM ports would be detected after just 1 timeout ideally,
and not after the 3 timeouts of the AT ports. Or even worse, as in the
ZTE plugin for example, which needs 6 AT command timeouts before
starting QCDM probing (3 ATE0+CPMS? and 3 AT+GCAP?).

Or is there a good reason to leave QCDM probing always for after AT
probing?

Cheers,

-- 
Aleksander