At Thu, 28 Jul 2011 17:21:06 +0300, Tatulea, Dragos wrote:
Hi,
I'm in the process of enabling pm runtime pm for the hda_intel driver, not being sure if this is a sane task :). Noticed that CONFIG_SND_HDA_POWER_SAVE disables codecs and chip when they are not in use, but the power gain is not noticeable on my hw. On the other hand, a full suspend (azx_suspend) does save a few hundred mW's. I am aware that this is hw specific, but I would like to take advantage of the full suspend. Suspend/resume latency is below jiffy resolution.
Hm, it's strange. Basically the current power-save does almost equivalent with the normal suspend/resume, i.e. the codec is suspended and azx_stop_chip() is called. Make sure that the power-saving is really kicked in during your test.
Takashi