Re: [PATCH] platform/x86/amd/pmc: Add LG Ultra PC 16U70Q to quirks list
From: Mario Limonciello
Date: Fri Oct 30 2026 - 10:15:18 EST
On 10/29/26 18:24, Carlos Baiget Orts via B4 Relay wrote:
From: Carlos Baiget Orts <asinfreedom@xxxxxxxxx>
The LG Ultra PC 16U70Q (Ryzen 7 5825U) spends ~5 seconds in the noirq
resume phase on every s2idle resume. This is the same NVMe SMI handler
issue seen on other Cezanne systems. Skipping it with s2idle_bug_mmio
brings it down to ~32 ms.
As on the other Cezanne systems, the entry must also keep the spurious
IRQ1 (8042) wakeup workaround. Otherwise the system wakes up immediately
from s2idle, so use quirk_s2idle_spurious_8042.
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/6021
Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Carlos Baiget Orts <asinfreedom@xxxxxxxxx>
---
Reviewed-by: Mario Limonciello (AMD) <superm1@xxxxxxxxxx>
Tested on the 16U70Q (BIOS L2UG0160) with a locally built amd_pmc
carrying this entry: noirq resume drops from ~5.2 s to ~32 ms, and
s2idle no longer wakes up immediately from spurious IRQ1 events.
---
drivers/platform/x86/amd/pmc/pmc-quirks.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
index fed6c51879..ca188d815c 100644
--- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
+++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
@@ -386,6 +386,15 @@ static const struct dmi_system_id fwbug_list[] = {
DMI_MATCH(DMI_BOARD_NAME, "WUJIE Series-X5SP4NAG"),
}
},
+ /* https://gitlab.freedesktop.org/drm/amd/-/issues/6021 */
+ {
+ .ident = "LG Ultra PC 16U70Q",
+ .driver_data = &quirk_s2idle_spurious_8042,
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "16U70Q"),
+ }
+ },
{}
};
---
base-commit: c339f4010dea8b0d754f84ace70cd1b089878ef8
change-id: 20261029-lg-16u70q-quirk-fae864db4054
Best regards,