diff options
| author | Iru Cai <mytbk920423@gmail.com> | 2020-09-24 21:18:40 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-09-30 10:13:48 +0000 |
| commit | 871f62c376bb4b6095d16277384e267bca02b4f4 (patch) | |
| tree | 16f17481146c6f0c9ce2b689b3407013604822a0 /Documentation/mainboard/lenovo | |
| parent | fbdab90b57160b85e6b9b860235bcebc28c13eb6 (diff) | |
lenovo/t440p: Add HDA verbs from the OEM firmware
To get the HDA verbs from the OEM firmware, open the firmware with
UEFITool, search for the existing HDA verbs, extract the UEFI module
and look for the verbs. Copy the consecutive 4 dword sets that look
like HDA verbs.
It is tested to make audio output from both the speaker and headphone
work.
Change-Id: Ie359fdf6785b1c0be8dc201cd76176c0a7fe7942
Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45693
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'Documentation/mainboard/lenovo')
| -rw-r--r-- | Documentation/mainboard/lenovo/t440p.md | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/Documentation/mainboard/lenovo/t440p.md b/Documentation/mainboard/lenovo/t440p.md index 08df76fdca..f364f07784 100644 --- a/Documentation/mainboard/lenovo/t440p.md +++ b/Documentation/mainboard/lenovo/t440p.md @@ -30,7 +30,6 @@ the laptop able to power on. ## Known Issues -- No audio output when using a headphone - Cannot get the mainboard serial number from the mainboard: the OEM UEFI firmware gets the serial number from an "emulated EEPROM" via I/O port 0x1630/0x1634, but it's still unknown how to make it work |