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ALSA: hda: Update documentation for aliasing via the model option

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The previous patch allowed user to specify the aliasing of SSID via
model option for applying a quirk.  Update the documentation
accordingly.

Link: https://lore.kernel.org/r/20210823073722.14873-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2021-08-23 09:37:22 +02:00
parent a235d5b8e5
commit 4a1672d183
2 changed files with 17 additions and 0 deletions
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6
Documentation/sound/alsa-configuration.rst
View File

@ -1059,6 +1059,12 @@ The model name ``generic`` is treated as a special case. When this
model is given, the driver uses the generic codec parser without
"codec-patch". It's sometimes good for testing and debugging.
The model option can be used also for aliasing to another PCI or codec
SSID. When it's passed in the form of ``model=XXXX:YYYY`` where XXXX
and YYYY are the sub-vendor and sub-device IDs in hex numbers,
respectively, the driver will refer to that SSID as a reference to the
quirk table.
If the default configuration doesn't work and one of the above
matches with your device, report it together with alsa-info.sh
output (with ``--no-upload`` option) to kernel bugzilla or alsa-devel

11
Documentation/sound/hd-audio/notes.rst
View File

@ -215,6 +215,17 @@ There are a few special model option values:
* when ``generic`` is passed, the codec-specific parser is skipped and
only the generic parser is used.
A new style for the model option that was introduced since 5.15 kernel
is to pass the PCI or codec SSID in the form of ``model=XXXX:YYYY``
where XXXX and YYYY are the sub-vendor and sub-device IDs in hex
numbers, respectively. This is a kind of aliasing to another device;
when this form is given, the driver will refer to that SSID as a
reference to the quirk table. It'd be useful especially when the
target quirk isn't listed in the model table. For example, passing
model=103c:8862 will apply the quirk for HP ProBook 445 G8 (which
isn't found in the model table as of writing) as long as the device is
handled equivalently by the same driver.
Speaker and Headphone Output
----------------------------