[PATCH] Fix Terratec Grabby AC97 codec detection

From	Matthieu Rogez <matthieu.rogez@gmail.com>
Newsgroups	linux.kernel
Subject	[PATCH] Fix Terratec Grabby AC97 codec detection
Date	2016-03-04 22:40 +0100
Message-ID	<r95C1-4Cy-7@gated-at.bofh.it> (permalink)
References	<r8Fey-21e-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Thanks Mauro for commenting on my work.
With respect to first version, I've:
* added a timeout mecanism as requested
* added an extra check to avoid cases when the same value is constantly
returned no matter which register is accessed.

---

To test this:
* modprobe em28xx-alsa
* connect Grabby
* mplayer tv:// -tv driver=v4l2:width=720:height=576:device=/dev/video1:input=0:fps=25:norm=SECAM-L:alsa:adevice=plughw.2:audiorate=48000:forceaudio:amode=1:immediatemode=0 -nocache -fps 60

NOTE: for some unknown reason, if em28xx-alsa is not loaded when Grabby is
connected, there will be no sound.
NOTE2: if Grabby is connected without loading em28xx-alsa first, just deconnect
the Grabby and reconnect it.

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[PATCH] Fix Terratec Grabby AC97 codec detection Matthieu Rogez <matthieu.rogez@gmail.com> - 2016-03-04 22:40 +0100

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