On Thu, 04 Feb 2021 09:07:09 +0100, Kai Vehmanen wrote:
Hi,
On Thu, 4 Feb 2021, Kai Vehmanen wrote:
To support more fine-grained control of link power, this patch implements new helper functions for codec drivers to turn codec links up and down. The HDA common suspend/resume code is modified to use the new functions. This allows to fully reuse the driver code both for plain and extended HDA controllers.
Takashi and others, this patch is a follow-up to the earlier thread about hdac link management: https://mailman.alsa-project.org/pipermail/alsa-devel/2021-January/179715.ht...
We have absolutely no calls from sound/pci/hda/ to hdaudio_ext.h before this patch, so I'm wondering if this is the right approach to take.
An obvious drawback by this patch is that it'll make the hda-ext code always loaded whenever it's enabled, no matter whether it's really used or not.
Maybe adding a new callback (link) in hdac_bus_ops can help?
It does seem to be the natural path forward and mimics what was done in e.g. hdac_hdmi. But we want to keep reusing driver code for all HDA implementations, so adding hdac-ext support to codec drivers seem like the best path.
Yes, I find we're heading to the right direction.
thanks,
Takashi