[AppleALC] alc-verb doesn't work correctly

[WingLim]

Since 61e2bbf is applied to AppleALC, we could send hda-verb command through AppleALC by adding alcverbs=1.

But there has a weird problem, my computer using ALC255 and I use the layout-id 66, then everything work except the headset micphone.

The I find a patch in patch_realtek.c#L5026 which can make micphone work with VerbStunb.kext something like CodecCommander.

Use hda-verb execute the patch I mention above.

0x500 is SET_COEF_INDEX
0x400 is SET_PROC_COEF

hda-verb 0x20 0x500 0x45
hda-verb 0x20 0x400 0xd489

hda-verb 0x20 0x500 0x1b
hda-verb 0x20 0x400 0x0c2b

hda-verb 0x57 0x500 0x03
hda-verb 0x57 0x400 0x8ea6

But I can not use alc-verb to execute above patch, It only work by remove the verb 00 like this:

alc-verb 0x20 0x500 0x45
alc-verb 0x20 0x4d4 0x89 # here

alc-verb 0x20 0x500 0x1b
alc-verb 0x20 0x40c 0x2b # here

alc-verb 0x57 0x500 0x03
alc-verb 0x57 0x48e 0xa6 # and here

I try to read the AppleALC source code, but stop at kern_alc.cpp#L332:22

IOReturn AlcEnabler::IOHDACodecDevice_executeVerb(void *hdaCodecDevice, uint16_t nid, uint16_t verb, uint16_t param, unsigned int *output, bool waitForSuccess){
	DBGLOG("alc", "IOHDACodecDevice::executeVerb with parameters nid = %u, verb = %u, param = %u", nid, verb, param);
	return FunctionCast(IOHDACodecDevice_executeVerb, callbackAlc->orgIOHDACodecDevice_executeVerb)(hdaCodecDevice, nid, verb, param, output, waitForSuccess);
}

Don't know how AppleALC execute verb command, and why the problems arise.

[vit9696]

The code is provided to us by AppleHDA, so it is not open-source. We are not sure either, perhaps there is a difference in argument format or Apple implementation is more limited. As long as you have a workaround, this will probably be it.

cc @black-dragon74

[mikebeaton]

This was resolved by the commit above, and alc-verb now accepts exactly the Linux format without any parameter edits needed.