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78f1699659
We discovered that at least one machine (HP Envy), methods in the DSDT attempt to call external methods defined in a dynamically loaded SSDT. Unfortunately, the DSDT methods we are trying to call are part of the EC initialization, which happens very early, and the the dynamic SSDT is only loaded when a processor _PDC method runs much later. This results in namespace lookup errors for the (as of yet) undefined methods. Since Windows doesn't have any issues with this machine, we take it as a hint that they must be evaluating _PDC much earlier than we are. Thus, the proper thing for Linux to do should be to match the Windows implementation more closely. Provide a mechanism to call _PDC before we enable the EC. Doing so loads the dynamic tables, and allows the EC to be enabled correctly. The ACPI processor driver will still evaluate _PDC in its .add() method to cover the hotplug case. Resolves: http://bugzilla.kernel.org/show_bug.cgi?id=14824 Cc: ming.m.lin@intel.com Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
/*
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* acpi/internal.h
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* For use by Linux/ACPI infrastructure, not drivers
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*
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* Copyright (c) 2009, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#define PREFIX "ACPI: "
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int init_acpi_device_notify(void);
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int acpi_scan_init(void);
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int acpi_system_init(void);
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#ifdef CONFIG_ACPI_DEBUG
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int acpi_debug_init(void);
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#else
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static inline int acpi_debug_init(void) { return 0; }
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#endif
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/* --------------------------------------------------------------------------
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Power Resource
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-------------------------------------------------------------------------- */
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int acpi_power_init(void);
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int acpi_device_sleep_wake(struct acpi_device *dev,
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int enable, int sleep_state, int dev_state);
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int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state);
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int acpi_disable_wakeup_device_power(struct acpi_device *dev);
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int acpi_power_get_inferred_state(struct acpi_device *device);
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int acpi_power_transition(struct acpi_device *device, int state);
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extern int acpi_power_nocheck;
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int acpi_wakeup_device_init(void);
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void acpi_early_processor_set_pdc(void);
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/* --------------------------------------------------------------------------
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Embedded Controller
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-------------------------------------------------------------------------- */
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int acpi_ec_init(void);
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int acpi_ec_ecdt_probe(void);
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int acpi_boot_ec_enable(void);
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/*--------------------------------------------------------------------------
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Suspend/Resume
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-------------------------------------------------------------------------- */
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extern int acpi_sleep_init(void);
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#ifdef CONFIG_ACPI_SLEEP
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int acpi_sleep_proc_init(void);
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#else
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static inline int acpi_sleep_proc_init(void) { return 0; }
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#endif
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