23 Mar, 2011
1 commit
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There may be multiple ways of controlling the backlight on a given
machine. Allow drivers to expose the type of interface they are
providing, making it possible for userspace to make appropriate policy
decisions.Signed-off-by: Matthew Garrett
Cc: Richard Purdie
Cc: Chris Wilson
Cc: David Airlie
Cc: Alex Deucher
Cc: Ben Skeggs
Cc: Zhang Rui
Cc: Len Brown
Cc: Jesse Barnes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Nov, 2010
1 commit
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backlight_device_register has been expecting a const "ops" argument, and using
it as such, since 9905a43b2d563e6f89e4c63c4278ada03f2ebb14. Let's make the
remaining backlight_ops instances const.Inspired by hunks of the grsecurity patch, updated for newer kernels.
Signed-off-by: Lionel Debroux
Acked-by: Ingo Molnar
Signed-off-by: Jiri Kosina
17 Mar, 2010
1 commit
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Values such as max_brightness should be set before backlights are
registered, but the current API doesn't allow that. Add a parameter to
backlight_device_register and update drivers to ensure that they
set this correctly.Signed-off-by: Matthew Garrett
Signed-off-by: Richard Purdie
09 Feb, 2010
1 commit
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machine is compatible is an OF-specific call. It should have
the of_ prefix to protect the global namespace.Signed-off-by: Grant Likely
Acked-by: Michal Simek
13 Mar, 2008
1 commit
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The PMU backlight code would kick in during sleep/resume even on
machines that use a different backlight method. This breaks
sleep on some PowerBooks.This fixes it by adding a flag to indicate whether the backlight
is controlled by the PMU, and testing that before trying to use
the PMU to turn off the backlight during sleep.Signed-off-by: Benjamin Herrenschmidt
Signed-off-by: Paul Mackerras
21 Dec, 2007
1 commit
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This fixes a few issues with via-pmu based backlight control.
First, it fixes a sign problem with the setup of the backlight
curve since the `range' value there -can- (and will) go negative.Then, it reworks the interaction between this and the via-pmu sleep
code to properly restore backlight on wakeup from sleep.Signed-off-by: Benjamin Herrenschmidt
Signed-off-by: Paul Mackerras
20 Feb, 2007
4 commits
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Per device data such as brightness belongs to the indivdual device
and should therefore be separate from the the backlight operation
function pointers. This patch splits the two types of data and
allows simplifcation of some code.Signed-off-by: Richard Purdie
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Move the setting/unsetting of pmac_backlight into the
backlight core instead of doing it in each driver.Signed-off-by: Richard Purdie
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backlight_device->sem has a very specific use as documented in the
header file. The external users of this are using it for a different
reason, to serialise access to the update_status() method.backlight users were supposed to implement their own internal
serialisation of update_status() if needed but everyone is doing
things differently and incorrectly. Therefore add a global mutex to
take care of serialisation for everyone, once and for all.Locking for get_brightness remains optional since most users don't
need it.Also update the lcd class in a similar way.
Signed-off-by: Richard Purdie
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Remove uneeded owner field from backlight_properties structure.
Nothing uses it and it is unlikely that it will ever be used. The
backlight class uses other means to ensure that nothing references
unloaded code.Based on a patch from Dmitry Torokhov
Signed-off-by: Richard Purdie
31 Dec, 2006
1 commit
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Signed-off-by: Andreas Schwab
Cc: "Yu, Luming"
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Sep, 2006
1 commit
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The uninitialised pmu_backlight_lock causes the current Fedora test kernel
(which has spinlock debugging enabled) to panic on suspend.This is suboptimal, so I fixed it.
Signed-off-by: David Woodhouse
Acked-by: Benjamin Herrenschmidt
Acked-by: Michael Hanselmann
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Sep, 2006
2 commits
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Fix some more problems (inverted use of semaphores in some places). He
also moved my checks into within the protected section which is better.Signed-off-by: Michael Hanselmann
Signed-off-by: Benjamin Herrenschmidt
Cc: "Antonino A. Daplas"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The via-pmu backlight code (introduced in 2.6.18) has various design issues
causing crashes on machines using it like the old Wallstreet powerbook
(Michael, the author, never managed to test on these and I just got my hand
on one of those old beasts).This fixes them by no longer trying to hijack the backlight device of the
frontmost framebuffer (causing that framebuffer to crash) but having it's
own local bits instead. Might look weird but it's better that way on those
old machines, at least as a last-minute fix for 2.6.18. We might rework
the whole thing later. This patch also changes the way it gets notified of
sleep and wakeup in order to properly shut the backlight down on sleep and
bring it back on wakeup.Signed-off-by: Benjamin Herrenschmidt
Cc: "Antonino A. Daplas"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Aug, 2006
1 commit
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This patch fixes several problems:
- The legacy backlight value might be set at interrupt time. Introduced
a worker to prevent it from directly calling the backlight code.
- via-pmu allows the backlight to be grabbed, in which case we need to
prevent other kernel code from changing the brightness.
- Don't send PMU requests in via-pmu-backlight when the machine is about
to sleep or waking up.
- More Kconfig fixes.Signed-off-by: Michael Hanselmann
Cc: Benjamin Herrenschmidt
Cc: "Antonino A. Daplas"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jun, 2006
1 commit
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This patch contains a total rewrite of the backlight infrastructure for
portable Apple computers. Backward compatibility is retained. A sysfs
interface allows userland to control the brightness with more steps than
before. Userland is allowed to upload a brightness curve for different
monitors, similar to Mac OS X.[akpm@osdl.org: add needed exports]
Signed-off-by: Michael Hanselmann
Acked-by: Benjamin Herrenschmidt
Cc: Richard Purdie
Cc: "Antonino A. Daplas"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds