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authorTakashi Iwai <tiwai@suse.de>2021-08-23 10:37:22 +0300
committerTakashi Iwai <tiwai@suse.de>2021-08-23 11:59:23 +0300
commit4a1672d183cc0bbf26292390ced0bbcb7e810ee1 (patch)
treeae0a450def15c46735f80c7adf5ace819eaabc42 /Documentation/sound
parenta235d5b8e550fac7520410440bcc8003fb4cf8d0 (diff)
downloadlinux-4a1672d183cc0bbf26292390ced0bbcb7e810ee1.tar.xz
ALSA: hda: Update documentation for aliasing via the model option
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>
Diffstat (limited to 'Documentation/sound')
-rw-r--r--Documentation/sound/alsa-configuration.rst6
-rw-r--r--Documentation/sound/hd-audio/notes.rst11
2 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/sound/alsa-configuration.rst b/Documentation/sound/alsa-configuration.rst
index f148b58502c0..e61edd1295fc 100644
--- a/Documentation/sound/alsa-configuration.rst
+++ b/Documentation/sound/alsa-configuration.rst
@@ -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
diff --git a/Documentation/sound/hd-audio/notes.rst b/Documentation/sound/hd-audio/notes.rst
index cf4d7158af78..d118b6fe269b 100644
--- a/Documentation/sound/hd-audio/notes.rst
+++ b/Documentation/sound/hd-audio/notes.rst
@@ -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
----------------------------