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| author |   Tomas Espeleta <tomas.espeleta@gmail.com> | 2019-08-09 16:37:54 +0200 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2019-08-09 16:57:31 +0200 |
| commit | a2ef03fe617a8365fb7794531b11ba587509a9b9 (patch) | |
| tree | 6b73fb3c113fcfa6110be29f3065669ce2d8b855 /Documentation/sound | |
| parent | ALSA: hda - Inform too slow responses (diff) | |
| download | linux-dev-a2ef03fe617a8365fb7794531b11ba587509a9b9.tar.xz linux-dev-a2ef03fe617a8365fb7794531b11ba587509a9b9.zip | |
ALSA: hda - Add a quirk model for fixing Huawei Matebook X right speaker
[ This is rather a revival of the patch Tomas sent in months ago, but
applying only with the quirk model option -- tiwai ]
Hard coded coefficients to make Huawuei Matebook X right speaker
work. The Matebook X has a ALC298, please refer to bug 197801 on
how these numbers were reverse engineered from the Windows driver
The reversed engineered sequence represents a repeating pattern
of verbs, and the only values that are changing periodically are
written on indexes 0x23 and 0x25:
0x500, 0x23
0x400, VALUE1
0x500, 0x25
0x400, VALUE2
* skipped reading sequences (0x500 - 0xc00 sequences are ignored)
* static values from reverse engineering are used
NOTE: since a significant risk is still considered, this is provided
as an experimental fix that isn't applied as default for now. For
enabling the fix, you'll have to choose huawei-mbx-stereo via model
option of snd-hda-intel module.
If we get feedback from users that this works stably, we may apply it
per default.
[ Some coding style fixes and replacement with AC_VERB_* by tiwai ]
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=197801
Signed-off-by: Tomas Espeleta <tomas.espeleta@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
| -rw-r--r-- | Documentation/sound/hd-audio/models.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/sound/hd-audio/models.rst b/Documentation/sound/hd-audio/models.rst index 7d7c191102a7..11298f0ce44d 100644 --- a/Documentation/sound/hd-audio/models.rst +++ b/Documentation/sound/hd-audio/models.rst @@ -260,6 +260,9 @@ alc295-hp-x360 HP Spectre X360 fixups alc-sense-combo Headset button support for Chrome platform +huawei-mbx-stereo + Enable initialization verbs for Huawei MBX stereo speakers; + might be risky, try this at your own risk ALC66x/67x/892 ============== |