[PATCH] ALSA: hda/realtek: Add quirk for Lenovo Ideapad S740

[Takashi Iwai]

On Fri, 16 Apr 2021 10:47:32 +0200,
Jaroslav Kysela wrote:
> 
> Dne 16. 04. 21 v 10:12 Takashi Iwai napsal(a):
> > Lenovo Ideapad S740 requires quite a few COEF setups to make its
> > speakers working.  The verb table was provided from Ryan Prescott as
> > the result of investigation via qemu:
> >   https://github.com/ryanprescott/realtek-verb-tools/wiki/How-to-sniff-verbs-from-a-Windows-sound-driver
> 
> [Cc: to Kailang / Realtek]
> 
> I believe that this sequence contains I2C writes to amplifier chips. It would
> be really helpful, if Realtek can provide more information for the I2C master
> interface for their codecs (describe basic I2C I/O).

Indeed.  Already a few drivers need the initialization of the chip
behind HD-audio, and it'd be good if we have some standard interface
for that.


thanks,

Takashi