On Thu, Feb 12, 2009 at 12:41:11PM +0800, Wu Fengguang wrote:
> static const char *channel_name[MAX_CHANNELS] = {
> /* 0 */ N_("Front Left"),
> /* 1 */ N_("Front Right"),
> /* 2 */ N_("Rear Left"),
> /* 3 */ N_("Rear Right"),
> /* 4 */ N_("Center"), /* wav file is "Front Center.wav" */
> /* 5 */ N_("LFE"), /* wav file is "Rear Center.wav" */
> /* 6 */ N_("Side Left"),
> /* 7 */ N_("Side Right"),
>
> Whereas the HDMI channel mapping selected for 6-channel playback is
>
> { .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } },
>
> Here the two mappings disagree on channels other than Front Left/Right.
>
> In theory the channel mapping should be adjusted via AC_VERB_SET_HDMI_CHAN_SLOT.
> However I found that verb takes no effect for G35/G45. So I'm afraid
> there's no trivial ways we can adjust the channel mapping.
If the driver can't reorder the channels to what ALSA
needs, is it possible to do it somewhere else like
HDA-Intel.conf and use the routing plugin somehow to
reorder things. Say for plughw:0,3 or modify the
surround51 device?
I don't know much about this interface but it looks like
channel routing is possible here.
Shane
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