10 Aug
2012
10 Aug
'12
10:35 a.m.
At Fri, 10 Aug 2012 10:18:57 +0000, Lin, Mengdong wrote:
The return value of snd_hda_param_read() is -1 for an error, otherwise it's the supported power states of a codec.
The supported power states is a 32-bit value. Bit 31 will be set to 1 if the codec supports EPSS, thus making "sup" negative. And the bit 28:5 is reserved as "0". So a negative value other than -1 shall be further checked.
Please refer to High-Definition spec 7.3.4.12 "Supported Power States", thanks!
Signed-off-by: Mengdong Lin mengdong.lin@intel.com
Hm, it's still sent in quoted-printable format, so can't be fed to git am...
Takashi