Commit Graph

14 Commits

Author SHA1 Message Date
Michael Karcher ed764e7ca0 ACPI / Video: Probe for output switch method when searching video devices.
This patch reverts one hunk of 677bd810ee
"ACPI video: remove output switching control", namely the removal of
probing for _DOS/_DOD when searching for video devices.

This is needed on some Fujitsu Laptops (at least S7110, P8010) for the
ACPI backlight interface to work, as an these machines, neither ROM nor
posting methods are available, and after removal of output switching,
none of the caps triggers, which prevents the backlight search from
being entered.

Tested on a Fujitsu Lifebook S7110 and Fujitsu Lifebook P8010.
This probably fixes https://bugzilla.kernel.org/show_bug.cgi?id=27312
for the people who have no entry in /sys/class/backlight.

This is the complete list of public (starting with "_") methods implemented
on the S7110, BIOS rev 1.34:

\_SB_.PCI0.GFX0._ADR
\_SB_.PCI0.GFX0._DOS
\_SB_.PCI0.GFX0._DOD
\_SB_.PCI0.GFX0.CRT._ADR
\_SB_.PCI0.GFX0.CRT._DCS
\_SB_.PCI0.GFX0.CRT._DGS
\_SB_.PCI0.GFX0.CRT._DSS
\_SB_.PCI0.GFX0.LCD._ADR
\_SB_.PCI0.GFX0.LCD._BCL
\_SB_.PCI0.GFX0.LCD._BCM
\_SB_.PCI0.GFX0.LCD._BQC
\_SB_.PCI0.GFX0.LCD._DCS
\_SB_.PCI0.GFX0.LCD._DGS
\_SB_.PCI0.GFX0.LCD._DSS
\_SB_.PCI0.GFX0.LCD._PS0
\_SB_.PCI0.GFX0.LCD._PS3
\_SB_.PCI0.GFX0.TV._ADR
\_SB_.PCI0.GFX0.TV._DCS
\_SB_.PCI0.GFX0.TV._DGS
\_SB_.PCI0.GFX0.TV._DSS
\_SB_.PCI0.GFX0.DVI._ADR
\_SB_.PCI0.GFX0.DVI._DCS
\_SB_.PCI0.GFX0.DVI._DGS
\_SB_.PCI0.GFX0.DVI._DSS

Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2011-02-12 01:40:16 +01:00
Zhang Rui 677bd810ee ACPI video: remove output switching control
Remove the ACPI video output switching control as it never works.

With the patch applied,
ACPI video driver still catches the video output notification,
but it does nothing but raises the notification to userspace.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-12-14 00:04:52 -05:00
Zhang Rui e9f74c489c ACPI video: fix a poor warning message
Fix a vague warning message.

https://bugzilla.kernel.org/show_bug.cgi?id=16599

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-09-28 21:38:01 -04:00
Kamal Mostafa eeb4bcb477 ACPI: video: fix acpi_backlight=video
Make "acpi_backlight=video" param enable ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO
as intended, instead of incorrectly enabling video output switching.

BugLink: http://bugs.launchpad.net/bugs/573120

Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: <stable@kernel.org>
Acked-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-05-20 01:31:00 -04:00
Linus Torvalds 3067e02f8f Merge branch 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPICA: Update version to 20091112.
  ACPICA: Add additional module-level code support
  ACPICA: Deploy new create integer interface where appropriate
  ACPICA: New internal utility function to create Integer objects
  ACPICA: Add repair for predefined methods that must return sorted lists
  ACPICA: Fix possible fault if return Package objects contain NULL elements
  ACPICA: Add post-order callback to acpi_walk_namespace
  ACPICA: Change package length error message to an info message
  ACPICA: Reduce severity of predefined repair messages, Warning to Info
  ACPICA: Update version to 20091013
  ACPICA: Fix possible memory leak for Scope ASL operator
  ACPICA: Remove possibility of executing _REG methods twice
  ACPICA: Add repair for bad _MAT buffers
  ACPICA: Add repair for bad _BIF/_BIX packages
2009-12-09 19:57:06 -08:00
Thadeu Lima de Souza Cascardo 94e2bd6888 tree-wide: fix some typos and punctuation in comments
fix some typos and punctuation in comments

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-12-04 15:39:48 +01:00
Lin Ming 2263576cfc ACPICA: Add post-order callback to acpi_walk_namespace
The existing interface only has a pre-order callback. This change
adds an additional parameter for a post-order callback which will
be more useful for bus scans. ACPICA BZ 779.

Also update the external calls to acpi_walk_namespace.

http://www.acpica.org/bugzilla/show_bug.cgi?id=779

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-11-24 21:31:10 -05:00
Stefan Bader 3a1151e3f1 ACPI: video: Loosen strictness of video bus detection code
BugLink: http://bugs.launchpad.net/bugs/333386

Currently a video bus device must (beside other criteria) define _DOD and
_DOS methods to be considered a video device.
Some broken BIOSes prevented working backlight control by only defining both
for one (non-existing bus) and only _DOD for the rest. With this patch in
place the other bus definitions were considered too and backlight control
started to work again.

Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-10-13 02:50:38 -04:00
Len Brown a192a9580b ACPI: Move definition of PREFIX from acpi_bus.h to internal..h
Linux/ACPI core files using internal.h all PREFIX "ACPI: ",
however, not all ACPI drivers use/want it -- and they
should not have to #undef PREFIX to define their own.

Add GPL commment to internal.h while we are there.

This does not change any actual console output,
asside from a whitespace fix.

Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 19:57:27 -04:00
Alexander Chiang 1e4cffe78e ACPI: video: convert to acpi_get_pci_dev
Now that acpi_get_pci_dev is available, let's use it instead of
acpi_get_physical_pci_device()

Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Alex Chiang <achiang@hp.com>
Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-17 23:32:23 -04:00
Zhang Rui 98758faffc ACPI video: add a warning message if _BQC is not found
ACPI backlight control w/o _BQC support is kinda firmware bug.
Add a warning if _BQC is not implemented.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-27 22:37:22 -04:00
Roel Kluin 8a383ef0be ACPI: ec.c, pci_link.c, video_detec.c: static
Sparse asked whether these could be static.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-12-30 23:27:04 -05:00
Len Brown f398778aa3 Merge branch 'video' into release
Conflicts:
	Documentation/kernel-parameters.txt

Signed-off-by: Len Brown <len.brown@intel.com>
2008-11-11 21:15:50 -05:00
Thomas Renninger c3d6de698c ACPI video: if no ACPI backlight support, use vendor drivers
If an ACPI graphics device supports backlight brightness functions (cmp. with
latest ACPI spec Appendix B), let the ACPI video driver control backlight and
switch backlight control off in vendor specific ACPI drivers (asus_acpi,
thinkpad_acpi, eeepc, fujitsu_laptop, msi_laptop, sony_laptop, acer-wmi).

Currently it is possible to load above drivers and let both poke on the
brightness HW registers, the video and vendor specific ACPI drivers -> bad.

This patch provides the basic support to check for BIOS capabilities before
driver loading time. Driver specific modifications are in separate follow up
patches.

"acpi_backlight=vendor"
	Prever vendor driver over ACPI driver for backlight.
"acpi_backlight=video" (default)
	Prever ACPI driver over vendor driver for backlight.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-11-07 23:57:55 -05:00