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mb/google/trulo/var/kaladin: Mute speaker amp to prevent pop noise on reboot

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This change mutes the amplifier by updating the HDA verb table boot beep
section, which is configured at boot time. The amplifier will be unmuted when
generating a dev beep to preserve that functionality.

After entering OS, the kernel will reset the drivers and re-enable the
speaker.

BUG=b:457933720
TEST=Play audio in the OS and reboot the device. Verify that no pop
noise is heard from the speakers.
TEST=Verify devbeep function

Change-Id: I19ef19533d8ed7522e638787c8179ae0fdbf1ebb
Signed-off-by: Terry Cheong <htcheong@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90238
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Terry Cheong 2025-11-26 16:50:22 +08:00 • committed by Matt DeVillier
commit fecf05c4f2
1 changed files with 1 additions and 1 deletions
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2
src/mainboard/google/brya/variants/kaladin/hda_verb.c
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@ -114,7 +114,7 @@ const u32 pc_beep_verbs[] = {
0x02050010,
0x02040020,
/* Dos beep path - 2 */
0x0143B000,
0x0143B080,
0x01470740,
0x01470C02,
0x01470C02,