From 871f62c376bb4b6095d16277384e267bca02b4f4 Mon Sep 17 00:00:00 2001 From: Iru Cai Date: Thu, 24 Sep 2020 21:18:40 +0800 Subject: 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 Reviewed-on: https://review.coreboot.org/c/coreboot/+/45693 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons --- Documentation/mainboard/lenovo/t440p.md | 1 - 1 file changed, 1 deletion(-) (limited to 'Documentation/mainboard') 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 -- cgit v1.2.3