linux-toradex.git/drivers/acpi, branch v2.6.27.16

ACPI: video: Fix reversed brightness behavior on ThinkPad SL series

2009-02-12T17:31:19+00:00

commit 935e5f290ec1eb0f1c15004421f5fd3154380fd5 upstream.

Section B.6.2 of ACPI 3.0b specification that defines _BCL method
doesn't require the brightness levels returned to be sorted.
At least ThinkPad SL300 (and probably all IdeaPads) returns the
array reversed (i.e. bightest levels have lowest indexes), which
causes the brightness management behave in completely reversed
manner on these machines (brightness increases when the laptop is
idle, while the display dims when used).

Sorting the array by brightness level values after reading the list
fixes the issue.

http://bugzilla.kernel.org/show_bug.cgi?id=12037

Signed-off-by: Zhang Rui 
Tested-by: Lubomir Rintel 
Signed-off-by: Len Brown 
Signed-off-by: Thomas Renninger 
Signed-off-by: Greg Kroah-Hartman

ACPICA: Add function to dereference returned reference objects

2009-02-12T17:31:14+00:00

commit bbc241340681557a16982f4d1840f00963bc05b4 upstream.

Examines the return object from a call to acpi_evaluate_object.
Any Index or RefOf references are automatically dereferenced in
an attempt to return something useful (these reference types
cannot be converted into an external ACPI_OBJECT.)
Lin Ming, Bob Moore.

http://bugzilla.kernel.org/show_bug.cgi?id=11105

Signed-off-by: Lin Ming 
Signed-off-by: Bob Moore 
Signed-off-by: Andi Kleen 
Signed-off-by: Len Brown 
Signed-off-by: Thomas Renninger 
Signed-off-by: Greg Kroah-Hartman

ACPICA: Copy dynamically loaded tables to local buffer

2009-02-12T17:31:13+00:00

commit f0e0da8a6cca44396c7a711e308d58084e881617 upstream.

Previously, dynamically loaded tables were simply mapped, but on some machines
this memory is corrupted after suspend. Now copy the table to a local buffer.
For OpRegion case, added checksum verify. Use the table length from the table header,
not the region length. For Buffer case, use the table length also.

http://bugzilla.kernel.org/show_bug.cgi?id=10734

Signed-off-by: Dennis Noordsij 
Signed-off-by: Bob Moore 
Signed-off-by: Lin Ming 
Signed-off-by: Andi Kleen 
Signed-off-by: Len Brown 
Signed-off-by: Thomas Renninger 
Signed-off-by: Greg Kroah-Hartman

ACPI: Skip the first two elements in the _BCL package

2009-02-12T17:31:09+00:00

commit 0a3db1cec5d476804185114ff5d1845aed3936b3 upstream.

According to the Spec the first two elements in the _BCL package won't be

regarded as the available brightness level. The first is the brightness when
full power is connected to the box(It means that the AC adapter is plugged).
The second is the brightness level when the box is on battery.
    If the first two elements are still used while finding the next brightness
level, it will fall back to the lowest level when keeping on pressing
hotkey. (On some boxes the brightness will be changed twice when hotkey is
pressed once. One is in the ACPI video driver. The other is changed by sys I/F.
In the ACPI video driver the first two elements will be used while changing
the brightness. But the first two elements is skipped while using sys I/F.
In such case there exists the inconsistency).
    So he first two elements had better be skipped while showing the available
brightness or finding the next brightness level.

http://bugzilla.kernel.org/show_bug.cgi?id=12450

Signed-off-by: Zhao Yakui 
Signed-off-by: Len Brown 
Signed-off-by: Greg Kroah-Hartman

ACPI: proc_dir_entry 'video/VGA' already registered

2009-02-12T17:31:08+00:00

commit f3b39f1393d5cebe56f43a584ef47efbebd2702c upstream.

eliminate the duplicate the name of "VGA"

http://bugzilla.kernel.org/show_bug.cgi?id=12514

Signed-off-by: Zhao Yakui 
Signed-off-by: Len Brown 
Signed-off-by: Greg Kroah-Hartman

ACPI: disable ACPI cleanly when bad RSDP found

2009-02-12T17:31:06+00:00

commit 9e3a9d1ed8cc8db93e5c53e9a5b09065bd95de8b upstream.

When ACPI is disabled in the BIOS of this VIA C3 box,
it invalidates the RSDP, which Linux notices:

ACPI Error (tbxfroot-0218): A valid RSDP was not found [20080926]

Bug Linux neglected to disable ACPI at that stage,
and later scribbled on smp_found_config:

ACPI: No APIC-table, disabling MPS

But this box doesn't run well in legacy PIC mode,
it needed IOAPIC mode to perform correctly:

http://lkml.org/lkml/2009/2/5/39

So exit ACPI mode cleanly when we first detect
that it is hopeless.

Signed-off-by: Len Brown 
Signed-off-by: Greg Kroah-Hartman

ACPICA: Fix table entry truncation calculation

2009-02-12T17:31:05+00:00

commit 386e4a8358239f90275e1f93d5ad11cdc93c6453 upstream.

During early boot, ACPI RSDT/XSDT table entries are gathered into the
'initial_tables[]' array.  This array is currently statically defined (see
./drivers/acpi/tables.c).  When there are more table entries than can be
held in the 'initial_tables[]' array, the message "Truncating N table
entries!" is output.  As currently implemented, this message will always
erroneously calculate N as 0.

This patch fixes the calculation that determines how many table entries
will be missing (truncated).

This modification may be used under either the GPL or the BSD-style
license used for Intel ACPI CA code.

Signed-off-by: Myron Stowe 
Signed-off-by: Andrew Morton 
Signed-off-by: Len Brown 
Signed-off-by: Greg Kroah-Hartman

ACPI: dock: Don't eval _STA on every show_docked sysfs read

2009-02-12T17:30:59+00:00

commit fc5a9f8841ee87d93376ada5d73117d4d6a373ea upstream.

Some devices trigger a DEVICE_CHECK on every evalutation of _STA. This
can also be seen in commit 8b59560a3baf2e7c24e0fb92ea5d09eca92805db
(ACPI: dock: avoid check _STA method).  If an undock is processed, the
dock driver sends a uevent and userspace might read the show_docked
property in sysfs. This causes an evaluation of _STA of the particular
device which causes the dock driver to immediately dock again.

In any case, evaluation of _STA (show_docked) does not necessarily mean
that we are docked, so check with the internal device structure.

http://bugzilla.kernel.org/show_bug.cgi?id=12360

Signed-off-by: Holger Macht 
Signed-off-by: Len Brown 
Signed-off-by: Greg Kroah-Hartman

ACPICA: Allow multiple backslash prefix in namepaths

2009-02-06T22:00:45+00:00

commit d037c5fd7367548191eab2b376a1d08c4ffaf7ff upstream.

In a fully qualified namepath, allow multiple backslash prefixes.
This can happen because of the use of a double-backslash in strings
(since backslash is the escape character) causing confusion.
ACPICA BZ 739 Lin Ming.

http://www.acpica.org/bugzilla/show_bug.cgi?id=739

Signed-off-by: Lin Ming 
Signed-off-by: Bob Moore 
Signed-off-by: Len Brown 
Cc: Thomas Renninger 
Signed-off-by: Greg Kroah-Hartman

ACPI suspend: Blacklist HP xw4600 Workstation for old code ordering

2009-02-06T22:00:44+00:00

commit 4fb507b6b764195bb7821cf2baa988f6eb677d30

HP xw4600 Workstation is known to require the "old" (ie. compatible
with ACPI 1.0) suspend code ordering, so blacklist it for this
purpose.

Signed-off-by: Rafael J. Wysocki 
Tested-by: John Brown 
Signed-off-by: Len Brown 
Cc: Thomas Renninger 
Signed-off-by: Greg Kroah-Hartman