At Fri, 22 Aug 2008 15:20:09 -0700,
John L. Utz III wrote:
>
> ac97_patch.c provides two helper functions that wrap the channel_mode
> variable, but they only take you out to 5.1 Audio:
>
> static inline int is_surround_on(struct snd_ac97 *ac97)
> {
> return ac97->channel_mode >= 1;
> }
>
> static inline int is_clfe_on(struct snd_ac97 *ac97)
> {
> return ac97->channel_mode >= 2;
> }
>
>
> For 7.1 Audio, i think there needs to be a test for 'Surround Back' or
> 'Back Surround'
>
> static inline int is_surback_on(struct snd_ac97 *ac97)
> {
> return ac97->channel_mode >= 4;
> }
>
>
> Am i correct? or am i mistaken? agreement or corrections appreciated!
It's correct. The code for 7.1-audio capability was added recently.
Takashi
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