[alsa-devel] HDA Firmware file question
tiwai at suse.de
Thu Nov 17 16:13:41 CET 2011
At Thu, 17 Nov 2011 10:37:32 +0100,
David Henningsson wrote:
> As seen in the "Early Patching" section of the "More notes on HD-Audio
> driver" document, you're supposed to activate it like this:
> options snd-hda-intel patch=on-board-patch,hdmi-patch
> But how do we know the order here? The pci bus is probed in parallel
> (right?) so could this be racy, that on every other boot, the hdmi card
> is probed first instead?
IIRC, the probing order in the driver is serialized, so it doesn't
vary, just depending on the PCI slots. In practice, I've never seen
any order changes.
> Also, since the patch file specifies a [codec] section, you could
> actually use the same patch file for almost all cases. I guess the case
> of having two card instances with the same codec at the same address is
> pretty unusual, right?
Right. You must specify the codec SSID, and this should be unique
enough for identify each instance.
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