• Peter Zubaj's avatar
    ALSA: emu10k1: Emu10k2 32 bit DMA mode · 7241ea55
    Peter Zubaj authored
    Looks like audigy emu10k2 (probably emu10k1 - sb live too) support two
    modes for DMA. Second mode is useful for 64 bit os with more then 2 GB
    of ram (fixes problems with big soundfont loading)
    
    1) 32MB from 2 GB address space using 8192 pages (used now as default)
    2) 16MB from 4 GB address space using 4096 pages
    
    Mode is set using HCFG_EXPANDED_MEM flag in HCFG register.
    Also format of emu10k2 page table is then different.
    Signed-off-by: 's avatarPeter Zubaj <pzubaj@marticonet.sk>
    Tested-by: 's avatarTakashi Iwai <tiwai@suse.de>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: 's avatarTakashi Iwai <tiwai@suse.de>
    7241ea55
emu10k1.h 89.2 KB