[alsa-devel] HDA Firmware file question

[Takashi Iwai]

At Thu, 17 Nov 2011 10:37:32 +0100,
David Henningsson wrote:
> 
> Hi,
> 
> 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.


thanks,

Takashi