On Fri, 16 Apr 2021 18:05:17 +0200, Pierre-Louis Bossart wrote: > > > > On 4/16/21 3:47 AM, 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). > > The biggest problem is to figure what address/value pairs to write > with I2C into the amplifiers, and here the catch is that those I2C/I2S > amplifiers may or may not be sourced from Realtek, and it'd be > difficult for Realtek to provide documentation on their competition, > wouldn't it? Sure, that's another problem. But currently it's not clear even how to communicate via I2C/whatever to the underlying chip, as it's done via the vendor-specific COEF verb. At least this could be opened, I hope. Takashi
