From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ondrej Zary <linux@rainbow-software.org>
Subject: 7.1 surround channels missing on CS46xx
Date: Thu, 16 May 2013 12:55:26 +0200
Message-ID: <201305161255.26607.linux@rainbow-software.org>
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Hello,
I got a Hercules Fortissimo 7.1 sound card (CS4624 + two CS4294) but 
snd-cs46xx driver supports only 6 channels (front, rear, center/lfe). The 
surround output (7&8) is not supported - as seen in dsp_spos_scb_lib.c:

       case DSP_PCM_S71_CHANNEL:
                /* TODO */
                snd_BUG();
                break;

Tried to add a code for this, mostly copying the center/lfe code but I miss 
some data:
 - which slots (ACOSV_SLVx) should be used (maybe 10 and 12?)
 - what are the channel_disp and fifo_addr values for
   cs46xx_dsp_create_codec_out_scb() function
 - what values should S71_MIXER_SCB_ADDR and S71_CODEC_SCB_ADDR be (maybe
   0x1b0 and 0x1c0?)

-- 
Ondrej Zary