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Neither me nor Ariff have access to any of this hardware, so all tests have been made by Konstantin and Artem. Commit message mostly written by Konstantin. envy24: - Add test code to support rear line-in input on 'Terratec DMX 6fire' audio card. This code is also intended to be used in the future for support of cards, that have I2C-to-GPIO expanders wired between the control line of the audio codec and the Envy24, however such cards are too complex and i can't add that support without hardware sample of such board, i've already tried and failed. envy24ht: - Add support for 'AudioTrak Prodigy HD2'. - Add support for 'AudioTrak Prodigy 7.1 XT'. - Add support for 'ESI Juli@' (Works ok, DAC volume is hard-coded for the time being, so 'mixer vol ...' doesn't work, only 'mixer pcm ...' works). [1] - Fix bug in the init data for M-Audio Revolution 5.1, that results in distorted sound. - Add software volume control (now 'mixer pcm' works, thanks to Ariff). - Add support for more samples rates - 176.4kHz and 192kHz. - Fix problem with the 192kHz samples rate playback when 24.576MHz crystal is used on the board instead of 49.152MHz crystal. spicds: - Add support for Asahi Kasei flagship DAC - AK4396 (used in AudioTrak Prodigy HD2). Submitted by: Konstantin Dimitrov <kosio.dimitrov@gmail.com> Tested by: Artem Antonov [1] Reviewed by: ariff
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