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authorIru Cai <mytbk920423@gmail.com>2020-09-24 21:18:40 +0800
committerPatrick Georgi <pgeorgi@google.com>2020-09-30 10:13:48 +0000
commit871f62c376bb4b6095d16277384e267bca02b4f4 (patch)
tree16f17481146c6f0c9ce2b689b3407013604822a0 /Documentation/mainboard
parentfbdab90b57160b85e6b9b860235bcebc28c13eb6 (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')
-rw-r--r--Documentation/mainboard/lenovo/t440p.md1
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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