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ec/lenovo/h8/acpi: Support pulsing LEDLOGO on Haswell ThinkPads

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The name LEDLOGO comes from schematics. It's the red indicator, embedded
in the dot of the 'i' of the ThinkPad logo on laptop's lid.

In vendor firmware, this led starts fading in-and-out, or, in other
words, pulsing, when laptop is put to S3. It helps to determine whether
the laptop is in S3 just by taking a look at the logo.

As of now, coreboot doesn't do anything with this particular indicator,
it's always in enabled (on) state, which is not very convenient.

This patch fixes it.

Tested on T440p.

Change-Id: I85fb69c8c1bed8635a1b31e9b8385c7036bb46dd
Signed-off-by: Evgeny Zinoviev <me@ch1p.io>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80437
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Nicholas Chin <nic.c3.14@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Evgeny Sorokin
2024-02-10 03:32:41 +03:00
committed by Felix Singer
parent 60a68295b8
commit d48d72c9ce
3 changed files with 21 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/ec/lenovo/h8/Kconfig
View File

@@ -52,6 +52,10 @@ config H8_HAS_PRIMARY_FN_KEYS
bool
default n
config H8_HAS_LEDLOGO
bool
default n
config THINKPADEC_HKEY_EISAID
string
default "IBM0068"

16
src/ec/lenovo/h8/acpi/systemstatus.asl
View File

@@ -12,6 +12,10 @@ Scope (\_SI)
\_SB.PCI0.LPCB.EC.TLED(0x00)
/* suspend TLED off */
\_SB.PCI0.LPCB.EC.TLED(0x07)
#if CONFIG(H8_HAS_LEDLOGO)
/* logo TLED off */
\_SB.PCI0.LPCB.EC.TLED(0x0a)
#endif
}
If (Arg0 == 1) {
@@ -21,6 +25,10 @@ Scope (\_SI)
\_SB.PCI0.LPCB.EC.TLED(0x80)
/* suspend TLED off */
\_SB.PCI0.LPCB.EC.TLED(0x07)
#if CONFIG(H8_HAS_LEDLOGO)
/* logo TLED on */
\_SB.PCI0.LPCB.EC.TLED(0x8a)
#endif
}
If (Arg0 == 2) {
@@ -30,6 +38,10 @@ Scope (\_SI)
\_SB.PCI0.LPCB.EC.TLED(0x80)
/* suspend LED blinking */
\_SB.PCI0.LPCB.EC.TLED(0xc7)
#if CONFIG(H8_HAS_LEDLOGO)
/* logo TLED on */
\_SB.PCI0.LPCB.EC.TLED(0x8a)
#endif
}
If (Arg0 == 3) {
@@ -39,6 +51,10 @@ Scope (\_SI)
\_SB.PCI0.LPCB.EC.TLED(0xa0)
/* suspend TLED on */
\_SB.PCI0.LPCB.EC.TLED(0x87)
#if CONFIG(H8_HAS_LEDLOGO)
/* logo TLED pulsing */
\_SB.PCI0.LPCB.EC.TLED(0xaa)
#endif
}
}
}