[alsa-devel] [PATCH] ALSA : hda - bug fix on checking the supported power states of a codec

[Takashi Iwai]

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 at intel.com>

Hm, it's still sent in quoted-printable format, so can't be fed to
git am...


Takashi