Add a patch fixing touchscreens on HP AMD based laptops (rhbz#1644013)
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0001-ACPI-platform-Add-SMB0001-HID-to-forbidden_id_list.patch
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0001-ACPI-platform-Add-SMB0001-HID-to-forbidden_id_list.patch
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From 5afcaee5ee71ba730fde8f66da7e320fb7e674d2 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Mon, 19 Nov 2018 17:38:59 +0100
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Subject: [PATCH 4.20 regression fix] ACPI / platform: Add SMB0001 HID to
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forbidden_id_list
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Many HP AMD based laptops contain an SMB0001 device like this:
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Device (SMBD)
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{
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Name (_HID, "SMB0001") // _HID: Hardware ID
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Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings
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{
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IO (Decode16,
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0x0B20, // Range Minimum
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0x0B20, // Range Maximum
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0x20, // Alignment
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0x20, // Length
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)
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IRQ (Level, ActiveLow, Shared, )
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{7}
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})
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}
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The legacy style IRQ resource here causes acpi_dev_get_irqresource() to
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be called with legacy=true and this message to show in dmesg:
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ACPI: IRQ 7 override to edge, high
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This causes issues when later on the AMD0030 GPIO device gets enumerated:
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Device (GPIO)
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{
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Name (_HID, "AMDI0030") // _HID: Hardware ID
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Name (_CID, "AMDI0030") // _CID: Compatible ID
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Name (_UID, Zero) // _UID: Unique ID
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Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
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{
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Name (RBUF, ResourceTemplate ()
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{
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Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,, )
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{
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0x00000007,
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}
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Memory32Fixed (ReadWrite,
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0xFED81500, // Address Base
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0x00000400, // Address Length
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)
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})
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Return (RBUF) /* \_SB_.GPIO._CRS.RBUF */
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}
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}
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Now acpi_dev_get_irqresource() gets called with legacy=false, but because
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of the earlier override of the trigger-type acpi_register_gsi() returns
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-EBUSY (because we try to register the same interrupt with a different
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trigger-type) and we end up setting IORESOURCE_DISABLED in the flags.
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The setting of IORESOURCE_DISABLED causes platform_get_irq() to call
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acpi_irq_get() which is not implemented on x86 and returns -EINVAL.
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resulting in the following in dmesg:
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amd_gpio AMDI0030:00: Failed to get gpio IRQ: -22
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amd_gpio: probe of AMDI0030:00 failed with error -22
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The SMB0001 is a "virtual" device in the sense that the only way the OS
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interacts with it is through calling a couple of methods to do SMBus
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transfers. As such it is weird that it has IO and IRQ resources at all,
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because the driver for it is not expected to ever access the hardware
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directly.
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The Linux driver for the SMB0001 device directly binds to the acpi_device
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through the acpi_bus, so we do not need to instantiate a platform_device
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for this ACPI device. This commit adds the SMB0001 HID to the
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forbidden_id_list, avoiding the instantiating of a platform_device for it.
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Not instantiating a platform_device means we will no longer call
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acpi_dev_get_irqresource() for the legacy IRQ resource fixing the probe of
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the AMDI0030 device failing.
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BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1644013
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BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=198715
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BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199523
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Reported-by: Lukas Kahnert <openproggerfreak@gmail.com>
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Tested-by: Marc <suaefar@googlemail.com>
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Cc: stable@vger.kernel.org
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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drivers/acpi/acpi_platform.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
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index eaa60c94205a..1f32caa87686 100644
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--- a/drivers/acpi/acpi_platform.c
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+++ b/drivers/acpi/acpi_platform.c
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@@ -30,6 +30,7 @@ static const struct acpi_device_id forbidden_id_list[] = {
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{"PNP0200", 0}, /* AT DMA Controller */
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{"ACPI0009", 0}, /* IOxAPIC */
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{"ACPI000A", 0}, /* IOAPIC */
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+ {"SMB0001", 0}, /* ACPI SMBUS virtual device */
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{"", 0},
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};
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--
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2.19.1
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@ -606,6 +606,9 @@ Patch501: Fix-for-module-sig-verification.patch
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# rhbz 1431375
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Patch502: input-rmi4-remove-the-need-for-artifical-IRQ.patch
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# rhbz 1644013, patch pending upstream
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Patch503: 0001-ACPI-platform-Add-SMB0001-HID-to-forbidden_id_list.patch
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# END OF PATCH DEFINITIONS
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%endif
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@ -1880,6 +1883,7 @@ fi
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%changelog
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* Tue Nov 20 2018 Hans de Goede <hdegoede@redhat.com>
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- Turn on CONFIG_PINCTRL_GEMINILAKE on x86_64 (rhbz#1639155)
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- Add a patch fixing touchscreens on HP AMD based laptops (rhbz#1644013)
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* Mon Nov 19 2018 Jeremy Cline <jcline@redhat.com> - 4.20.0-0.rc3.git0.1
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- Linux v4.20-rc3
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