hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ACPI: resource: skip IRQ override on AMD Zen platforms 

IRQ override isn't needed on modern AMD Zen systems.
There's an active low keyboard IRQ on AMD Ryzen 6000 and it will stay
this way on newer platforms. This IRQ override breaks keyboards for
almost all Ryzen 6000 laptops currently on the market.

Skip this IRQ override for all AMD Zen platforms because this IRQ
override is supposed to be a workaround for buggy ACPI DSDT and we can't
have a long list of all future AMD CPUs/Laptops in the kernel code.
If a device with buggy ACPI DSDT shows up, a separated list containing
just them should be created.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=216118
Suggested-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Acked-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: XiaoYan Li <lxy.lixiaoyan@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Chuanhong Guo 2022-07-12 10:00:58 +08:00 committed by Rafael J. Wysocki
parent ff6992735a
commit 9946e39fe8
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/acpi/resource.c
View File

@ -416,6 +416,16 @@ static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
{
int i;
#ifdef CONFIG_X86
/*
* IRQ override isn't needed on modern AMD Zen systems and
* this override breaks active low IRQs on AMD Ryzen 6000 and
* newer systems. Skip it.
*/
if (boot_cpu_has(X86_FEATURE_ZEN))
return false;
#endif
for (i = 0; i < ARRAY_SIZE(skip_override_table); i++) {
const struct irq_override_cmp *entry = &skip_override_table[i];