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b5cc169919
The _STA method of the Venue 11 Pro 7130 touchscreen has this ugliness:
Method (_STA, 0, NotSerialized) // _STA: Status
{
If ((SDS1 & One) == One)
{
If (RST1 == Zero)
{
Return (0x0F)
}
ElseIf (RST2 == Zero)
{
RST2 = One
TMRV = Timer
}
Else
{
Local0 = ((Timer - TMRV) / 0x2710)
If (Local0 > TMRI)
{
RST2 = Zero
RST1 = Zero
}
}
}
Else
{
Return (Zero)
}
}
Whereby RST1 gets set by _SB.PCI0.GFX0.LCD.LCD1._ON, this means that
after RST1 has been set first _STA must be called to set TIMER and
then after enough time has elapsed _STA must be called twice more, once
to clear RST1 and once to finally return 0xf before the touchscreen will
show up. Which is just crazy.
This commit adds an always_present_ids entry for the SYNA7500 touchscreen
ACPI node, together with a DMI match for the Venue 11 Pro 7130, fixing the
touchscreen not working on this device.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
/*
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* X86 ACPI Utility Functions
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*
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* Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
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*
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* Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
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* Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/acpi.h>
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#include <linux/dmi.h>
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#include <asm/cpu_device_id.h>
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#include <asm/intel-family.h>
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#include "../internal.h"
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/*
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* Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because
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* some recent Windows drivers bind to one device but poke at multiple
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* devices at the same time, so the others get hidden.
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*
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* Some BIOS-es (temporarily) hide specific APCI devices to work around Windows
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* driver bugs. We use DMI matching to match known cases of this.
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*
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* We work around this by always reporting ACPI_STA_DEFAULT for these
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* devices. Note this MUST only be done for devices where this is safe.
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*
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* This forcing of devices to be present is limited to specific CPU (SoC)
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* models both to avoid potentially causing trouble on other models and
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* because some HIDs are re-used on different SoCs for completely
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* different devices.
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*/
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struct always_present_id {
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struct acpi_device_id hid[2];
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struct x86_cpu_id cpu_ids[2];
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struct dmi_system_id dmi_ids[2]; /* Optional */
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const char *uid;
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};
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#define ICPU(model) { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, }
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#define ENTRY(hid, uid, cpu_models, dmi...) { \
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{ { hid, }, {} }, \
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{ cpu_models, {} }, \
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{ { .matches = dmi }, {} }, \
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uid, \
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}
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static const struct always_present_id always_present_ids[] = {
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/*
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* Bay / Cherry Trail PWM directly poked by GPU driver in win10,
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* but Linux uses a separate PWM driver, harmless if not used.
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*/
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ENTRY("80860F09", "1", ICPU(INTEL_FAM6_ATOM_SILVERMONT1), {}),
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ENTRY("80862288", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {}),
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/*
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* The INT0002 device is necessary to clear wakeup interrupt sources
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* on Cherry Trail devices, without it we get nobody cared IRQ msgs.
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*/
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ENTRY("INT0002", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {}),
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/*
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* On the Dell Venue 11 Pro 7130 the DSDT hides the touchscreen ACPI
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* device until a certain time after _SB.PCI0.GFX0.LCD.LCD1._ON gets
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* called has passed *and* _STA has been called at least 3 times since.
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*/
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ENTRY("SYNA7500", "1", ICPU(INTEL_FAM6_HASWELL_ULT), {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
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}),
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};
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bool acpi_device_always_present(struct acpi_device *adev)
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{
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u32 *status = (u32 *)&adev->status;
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u32 old_status = *status;
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bool ret = false;
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unsigned int i;
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/* acpi_match_device_ids checks status, so set it to default */
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*status = ACPI_STA_DEFAULT;
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for (i = 0; i < ARRAY_SIZE(always_present_ids); i++) {
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if (acpi_match_device_ids(adev, always_present_ids[i].hid))
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continue;
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if (!adev->pnp.unique_id ||
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strcmp(adev->pnp.unique_id, always_present_ids[i].uid))
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continue;
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if (!x86_match_cpu(always_present_ids[i].cpu_ids))
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continue;
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if (always_present_ids[i].dmi_ids[0].matches[0].slot &&
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!dmi_check_system(always_present_ids[i].dmi_ids))
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continue;
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if (old_status != ACPI_STA_DEFAULT) /* Log only once */
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dev_info(&adev->dev,
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"Device [%s] is in always present list\n",
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adev->pnp.bus_id);
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ret = true;
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break;
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}
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*status = old_status;
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return ret;
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}
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