From: Hui Wang hui.wang@canonical.com
[ Upstream commit 892a012699fc0b91a2ed6309078936191447f480 ]
After the commit 0ec4e55e9f57 ("ACPI: resources: Add checks for ACPI IRQ override") is reverted, the keyboard on Medion laptops can't work again.
To fix the keyboard issue, add a DMI-based override check that will not affect other machines along the lines of prt_quirks[] in drivers/acpi/pci_irq.c.
If similar issues are seen on other platforms, the quirk table could be expanded in the future.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=213031 BugLink: http://bugs.launchpad.net/bugs/1909814 Suggested-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Reported-by: Manuel Krause manuelkrause@netscape.net Tested-by: Manuel Krause manuelkrause@netscape.net Signed-off-by: Hui Wang hui.wang@canonical.com [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/resource.c | 49 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 47 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index ee78a210c6068..7bf38652e6aca 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -16,6 +16,7 @@ #include <linux/ioport.h> #include <linux/slab.h> #include <linux/irq.h> +#include <linux/dmi.h>
#ifdef CONFIG_X86 #define valid_IRQ(i) (((i) != 0) && ((i) != 2)) @@ -380,9 +381,51 @@ unsigned int acpi_dev_get_irq_type(int triggering, int polarity) } EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
+static const struct dmi_system_id medion_laptop[] = { + { + .ident = "MEDION P15651", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), + DMI_MATCH(DMI_BOARD_NAME, "M15T"), + }, + }, + { } +}; + +struct irq_override_cmp { + const struct dmi_system_id *system; + unsigned char irq; + unsigned char triggering; + unsigned char polarity; + unsigned char shareable; +}; + +static const struct irq_override_cmp skip_override_table[] = { + { medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0 }, +}; + +static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity, + u8 shareable) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(skip_override_table); i++) { + const struct irq_override_cmp *entry = &skip_override_table[i]; + + if (dmi_check_system(entry->system) && + entry->irq == gsi && + entry->triggering == triggering && + entry->polarity == polarity && + entry->shareable == shareable) + return false; + } + + return true; +} + static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, u8 triggering, u8 polarity, u8 shareable, - bool legacy) + bool check_override) { int irq, p, t;
@@ -401,7 +444,9 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, * using extended IRQ descriptors we take the IRQ configuration * from _CRS directly. */ - if (legacy && !acpi_get_override_irq(gsi, &t, &p)) { + if (check_override && + acpi_dev_irq_override(gsi, triggering, polarity, shareable) && + !acpi_get_override_irq(gsi, &t, &p)) { u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;