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author | Chen Yu <yu.c.chen@intel.com> | 2016-05-03 16:48:39 +0800 |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-05-05 00:13:52 +0200 |
commit | e10cfdc33a0f23dc8449be7267f0a642e96a2a24 (patch) | |
tree | 8eb360b24f377a9c3ec5428b3fb8a1467e419621 /drivers/acpi | |
parent | a707edebadf1230f202000f29b28b7586ada4aa3 (diff) | |
download | linux-stable-e10cfdc33a0f23dc8449be7267f0a642e96a2a24.tar.gz linux-stable-e10cfdc33a0f23dc8449be7267f0a642e96a2a24.tar.bz2 linux-stable-e10cfdc33a0f23dc8449be7267f0a642e96a2a24.zip |
ACPI / osi: Fix default _OSI(Darwin) support
The following commit always reports positive value when Apple hardware
queries _OSI("Darwin"):
Commit: 7bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334
Subject: ACPI: Support _OSI("Darwin") correctly
However since this implementation places the judgement in runtime, it
breaks acpi_osi=!Darwin and cannot return unsupported for _OSI("WinXXX")
invoked before invoking _OSI("Darwin").
This patch fixes the issues by reverting the wrong support and implementing
the default behavior of _OSI("Darwin")/_OSI("WinXXX") on Apple hardware via
DMI matching.
Fixes: 7bc5a2bad0b8 (ACPI: Support _OSI("Darwin") correctly)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=92111
Reported-and-tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/blacklist.c | 23 | ||||
-rw-r--r-- | drivers/acpi/osl.c | 58 |
2 files changed, 74 insertions, 7 deletions
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c index 96809cd99ace..45390a953fb2 100644 --- a/drivers/acpi/blacklist.c +++ b/drivers/acpi/blacklist.c @@ -133,6 +133,11 @@ int __init acpi_blacklisted(void) return blacklisted; } #ifdef CONFIG_DMI +static int __init dmi_enable_osi_darwin(const struct dmi_system_id *d) +{ + acpi_dmi_osi_darwin(1, d); /* enable */ + return 0; +} static int __init dmi_enable_osi_linux(const struct dmi_system_id *d) { acpi_dmi_osi_linux(1, d); /* enable */ @@ -331,6 +336,24 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = { }, }, + /* + * Enable _OSI("Darwin") for all apple platforms. + */ + { + .callback = dmi_enable_osi_darwin, + .ident = "Apple hardware", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + }, + }, + { + .callback = dmi_enable_osi_darwin, + .ident = "Apple hardware", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."), + }, + }, + #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE /* * DELL XPS 13 (2015) switches sound between HDA and I2S diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index f801b59f2a94..1b84e4635ae0 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -135,6 +135,9 @@ static struct acpi_osi_config { unsigned int linux_enable:1; unsigned int linux_dmi:1; unsigned int linux_cmdline:1; + unsigned int darwin_enable:1; + unsigned int darwin_dmi:1; + unsigned int darwin_cmdline:1; u8 default_disabling; } osi_config = {0, 0, 0, 0}; @@ -150,13 +153,12 @@ static u32 acpi_osi_handler(acpi_string interface, u32 supported) } if (!strcmp("Darwin", interface)) { - /* - * Apple firmware will behave poorly if it receives positive - * answers to "Darwin" and any other OS. Respond positively - * to Darwin and then disable all other vendor strings. - */ - acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); - supported = ACPI_UINT32_MAX; + + printk_once(KERN_NOTICE PREFIX + "BIOS _OSI(Darwin) query %s%s\n", + osi_config.darwin_enable ? "honored" : "ignored", + osi_config.darwin_cmdline ? " via cmdline" : + osi_config.darwin_dmi ? " via DMI" : ""); } return supported; @@ -1783,6 +1785,44 @@ void __init acpi_osi_setup(char *str) } } +static void __init set_osi_darwin(unsigned int enable) +{ + if (osi_config.darwin_enable != enable) + osi_config.darwin_enable = enable; + + if (enable) { + acpi_osi_setup("!"); + acpi_osi_setup("Darwin"); + } else { + acpi_osi_setup("!!"); + acpi_osi_setup("!Darwin"); + } +} + +static void __init acpi_cmdline_osi_darwin(unsigned int enable) +{ + /* cmdline set the default and override DMI */ + osi_config.darwin_cmdline = 1; + osi_config.darwin_dmi = 0; + set_osi_darwin(enable); + + return; +} + +void __init acpi_dmi_osi_darwin(int enable, const struct dmi_system_id *d) +{ + printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); + + if (enable == -1) + return; + + /* DMI knows that this box asks OSI(Darwin) */ + osi_config.darwin_dmi = 1; + set_osi_darwin(enable); + + return; +} + static void __init set_osi_linux(unsigned int enable) { if (osi_config.linux_enable != enable) @@ -1870,6 +1910,10 @@ static int __init osi_setup(char *str) acpi_cmdline_osi_linux(1); else if (str && !strcmp("!Linux", str)) acpi_cmdline_osi_linux(0); + else if (str && !strcmp("Darwin", str)) + acpi_cmdline_osi_darwin(1); + else if (str && !strcmp("!Darwin", str)) + acpi_cmdline_osi_darwin(0); else acpi_osi_setup(str); |