linux-kernel - Re: [RFC 0/4] Don't do tuning zigzag using the very same frequency

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Message-ID: <20200617210755.1138caa2@coco.lan>
Date:   Wed, 17 Jun 2020 21:07:55 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Linux Media Mailing List <linux-media@...r.kernel.org>
Cc:     Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        Brad Love <brad@...tdimension.cc>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-kernel@...r.kernel.org, Sean Young <sean@...s.org>,
        devel@...verdev.osuosl.org,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Subject: Re: [RFC 0/4] Don't do tuning zigzag using the very same frequency

Em Wed, 17 Jun 2020 20:52:10 +0200
Mauro Carvalho Chehab <mchehab+huawei@...nel.org> escreveu:

> Marc reported on IRC that the zigzag code is trying to tune several times using
> the same frequency with si2168. Well, this is not how this would be supposed
> to do: it should try with different frequencies each time.
> 
> Change the core to use the one-shot mode if the frontend doesn't report a
> frequency step. This will default to the current behavior, except that tuning
> should be faster.
> 
> Yet, probably the right thing to do is to implement a frequency shift at such
> frontends, as otherwise  tuning may have problems. So, produce a warning
> on such cases, in order for the FE driver to be fixed.
> 


> Mauro Carvalho Chehab (4):
>   media: atomisp: fix identation at I2C Kconfig menu
>   media: atomisp: fix help message for ISP2401 selection

Those two patches are unrelated. Please ignore it on the context of this RFC.


Thanks,
Mauro